ricoh ft-7950 service manual

fiSERVICE MANUAL

PN: RCSMA246

A246/A247/A248

fi

fi

RICOH GROUP COMPANIES

SE

RV

ICE

MA

NU

AL

A2

46

/A2

47

/A2

48

RICOH GROUP COMPANIES

fi

fi

fi

A246/A247/A248SERVICE MANUAL

PN:RCSMA246

It is the reader's responsibility when discussing the information contained within thisdocument to maintain a level of confidentiality that is in the best interest of RicohCorporation and its member companies.

NO PART OF THIS DOCUMENT MAY BE REPRODUCED IN ANYFASHION AND DISTRIBUTED WITHOUT THE PRIOR

PERMISSION OF RICOH CORPORATION.

All product names, domain names or product illustrations, including desktop images,used in this document are trademarks, registered trademarks or the property of theirrespective companies.They are used throughout this book in an informational or editorial fashion only and forthe benefit of such companies. No such use, or the use of any trade name, or website is intended to convey endorsement or other affiliation with Ricoh products.

2000 RICOH Corporation. All rights reserved.

The Service Manual contains informationregarding service techniques, procedures,processes and spare parts of office equipmentdistributed by Ricoh Corporation. Users of thismanual should be either service trained orcertified by successfully completing a RicohTechnical Training Program.Untrained and uncertified users utilizinginformation contained in this service manual torepair or modify Ricoh equipment risk personalinjury, damage to property. or loss of warrantyprotection.

Ricoh Corporation

WARNING

LEGENDPRODUCT CODE COMPANY

GESTETNER RICOH SAVINA246 2851 FT7950 2050A247 2860 FT7960 2060A248 2870 FT7970 2070

DOCUMENTATION HISTORYREV. NO. DATE COMMENTS

* 12/98 Original Printing

A24

6/A2

47/A

248

and

A17

5/A

176/

A177

Prod

uct C

ompa

rison

Cha

rt

SM1

A246

/A24

7/A2

48

1.

THE

FOLL

OW

ING

TA

BLE

SHO

WS

THE

MAJ

OR

DIF

FER

ENCE

S BE

TWEE

N TH

E A2

46/A

247/

A248

AN

D A1

75/A

176/

A177

SERI

ES C

OPI

ERS.

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

Dup

lex

copy

co

ntro

l has

bee

n re

vised.

Th

edu

plex

co

py pr

odu

ctivi

ty ha

s be

en in

crease

din

the

simpl

ex to

du

plex

m

ode

. Be

fore

th

ela

st sh

eet o

f copy

pa

per

is s

tack

ed in

the

dupl

ex tra

y, th

e next

job

will

start

from

the

botto

m st

ack

ed

shee

t in

simpl

ex to

du

plex

mode

.

Afte

r th

e la

st s

heet

of

co

py pa

per

is st

ack

edin

the

dupl

ex tra

y, th

e next

job

will

start.

1

Dup

lex

copy

produ

ctivi

ty

A246

G50

7.W

MF

Ref

er to

SM

, pg

. 2-

113

for

deta

iled

info

rmatio

n.

2Ta

nde

m LC

TTh

e ta

nde

m LC

T (ca

paci

ty:

1,55

0 x

2) is

the

1st t

ray

for

easi

er pa

per

repl

enish

ment.

The

tande

m tra

y (ca

pacit

y: 50

0 x

2) is

the

1st

tray

for

(A17

6/A1

77/A

191/

A192

cop

iers

).Re

fer

to SM

, pg

. 2-

85/8

9fo

r de

taile

d in

form

atio

n.

Last

sh

eet

Last

sh

eet

Firs

t dup

lex

shee

t

Last

sh

eet

Firs

t dup

lex

shee

t

SM2

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

3

Toner

re-cy

cling

syst

emTh

e to

ner

fro

m th

e dr

um

cle

anin

g unit

and

transf

er

belt

unit

is co

llect

ed

and

the

filter

ing

equ

ipm

ent

m

ech

anism

se

para

tes

the

re-

usa

ble

toner

and

unusa

ble

mate

rial (b

lock

ed

toner

and

pape

r du

st). T

he r

e-usa

ble

toner

isre

turn

ed

to th

e to

ner

tank

and

the

unusa

ble

mate

rial i

s co

llect

ed

in th

e use

d to

ner

colle

ctio

n bo

ttle.

Ab

out 3

% of

to

ner

isco

llect

ed

in th

e use

d to

ner

co

llect

ion

bottl

e.

The

est

imate

d pe

riod

befo

re th

e to

ner

colle

ctio

n bo

ttle

is fu

ll ha

s be

en ext

ende

dfro

m 24

0 k

to 1,

500

k co

pies

.

Around

10%

of

to

ner

is c

olle

cted

to th

e use

dto

ner

colle

ctio

n bo

ttle w

ithou

t tra

nsf

err

ing

the

toner

to th

e co

py pa

per.

Refe

r to

SM

, pg

. 2-

31/3

5fo

r de

taile

d in

form

atio

n.

To im

prove

the

transf

er

belt

funct

ion,

acle

anin

g bi

as ro

ller a

nd

a b

ias

rolle

r bla

deha

ve b

een

adde

d to

th

e tra

nsf

er

belt

unit.

Even if

th

e to

ner

is no

t rem

ove

d co

mpl

etely

by th

e tra

nsf

er

belt

clean

ing

blad

e du

e to

th

epa

per d

ust s

tuck

on

the

transf

er be

lt cle

anin

gbl

ade,

th

e to

ner

is

attr

act

ed

to th

e neg

ativ

ech

arge

d cle

anin

g bi

as ro

ller.

The

bias

rolle

rbl

ade

scra

pes

off t

he to

ner

on

the

clea

ning

bias

rolle

r.4

Tran

sfer

be

ltcle

anin

g bi

asro

ller

A246

G50

0.W

MF

Refe

r to

SM

, pg

. 2-

65/6

7fo

r de

taile

d in

form

atio

n.

The

A229

(dig

ital c

opi

er)

does

not

hav

e a

transf

er

belt

clean

ing

blad

e.R

easo

n:If

the

toner

on th

e tra

nsf

erbe

lt w

ere

sc

rape

d by

a

clean

ing

blad

e, s

ome of

the

norm

ally

nega

tively

char

ged

toner

could

be

char

ged

posit

ively

byfri

ctio

n.

The

posit

ively

char

ged

toner

then

co

uld

not

be

rem

ove

d by

th

e cl

eani

ngbi

as ro

ller.

Clea

ning

Bi

as R

olle

r

Bias

Rol

ler B

lade

Tran

sfer

Be

lt Cl

eani

ng Bl

ade

SM3

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

5

Opt

ics/S

canner

retu

rn sp

eed

(70CP

M m

ach

ine)

To re

duce

th

e m

ach

ine

vibra

tion

while

the

scanner

is re

turn

ing

to th

e ho

me

posit

ion

for

70 c

pm m

ach

ines

, the

app

ropr

iate

retu

rnsp

eed

for

each

repr

odu

ctio

n r

atio

is a

dapt

ed

so th

at th

e vib

ratio

n of

th

e m

ach

ine

isre

duce

d (to

th

e 60

cpm

m

achi

ne le

vel).

Refe

r to

SM

, pg

. 2-

37 fo

rde

taile

d in

form

atio

n.

6O

pera

tion

pane

lFo

r easie

r ope

ratio

n, th

e LC

D on

the

ope

ratio

n pa

nel h

as

been

enla

rged

to 64

0 x

240

dots

. Fo

r eas

ier k

ey

ope

ratio

n,

the

layo

ut

of th

e ke

ys ha

s be

en ch

ange

d.

The

size of

th

e LC

D on

th

e ope

ratio

n p

anel

is

320

x 24

0 do

ts.

Refe

r to

th

e O

pera

ting

Inst

ruct

ions

.

7

Ope

ratio

nIm

prove

ments

re

sultin

g fro

m exp

erie

nce

with

A175

/A17

6/A1

77 m

ach

ines

have

be

enin

corp

orate

d to

fa

cilita

te m

ach

ine

oper

atio

n.

1) Th

e ke

y to

p fo

r th

e UP

mode

ha

s be

enadd

ed fo

r easi

er acc

ess

in th

e UP

m

ode

.

2) Ad

ditio

nal o

rigin

als

can

be s

et o

n th

e AD

Fta

ble

durin

g co

pyin

g and

the

copy

ope

ratio

n is

contin

ued

(tota

lly 10

0orig

inal

s).3)

A sa

mpl

e co

py ke

y is

adde

d to

th

eope

ratio

n pa

nel.

4) Th

e ra

nge

of

th

e ID

le

vel h

as b

een

wid

ened

from

7

to 9.

The

num

ber

ofpr

ogra

ms

has

been

in

crease

d fro

m 5

to10

. The

di

gits

of t

he u

ser

code

has

be

enin

crease

d fro

m 6

to 8.

5) Th

e units

(in

ch o

r m

m) c

an b

e ch

ange

d by

SP m

ode

.

The

ope

rato

rs ha

ve to

in

put 2

act

ions

of th

eke

y ope

ratio

n to

ent

er

the

UP m

ode

(Cle

arm

ode

key

and

Clea

r/Sto

p ke

y).Ad

ditio

nal o

rigin

al c

an be

set

on

ADF

tabl

edu

ring

copy

ing

but t

he c

opy

ope

ratio

n is

not

contin

ued

Refe

r to

th

e O

pera

ting

Inst

ruct

ions

8

Proce

ss c

ontro

lauto

sta

rt m

ode

The

proce

ss co

ntro

l auto

st

art m

ode

ca

n b

ese

lect

ed

in S

P m

ode

(D

efa

ult:

sele

cted).

To

main

tain

opt

imum

co

py qu

alit

y, pr

ocess

contro

l occ

urs

eve

ry 24

hou

rs eve

n if

th

em

ain

swi

tch

is n

ot tu

rned

off.

The

proce

ss c

ont

rol o

nly

starts

w

hen

the

fusi

ng

tem

pera

ture

is

low

. If

the

main

sw

itch

of th

e co

pier

is

not

tu

rned

off d

urin

g 24

ho

urs,

the

fusi

ng te

mpe

ratu

re d

oes

not

go

do

wn to

100

C. Pr

oce

ss co

ntro

l can

not

be c

arr

ied

out.

Refe

r to

SM

, pg

. 4-

8 and

SP 1

-12-

1 fo

r de

taile

din

form

atio

n.

SM4

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

9D

rive

for

the

regi

stra

tion ro

ller

An in

depe

nden

t ste

ppin

g m

oto

r dr

ives

the

regi

stra

tion r

olle

r to

ensu

re go

od

copy

qual

ity.

Whe

n th

e re

gist

ratio

n c

lutc

h tu

rns

on,

th

em

ain

m

otor

ro

tatio

n m

ay

som

etim

es

besh

ocke

d. J

itter

m

ay

app

ear a

t 80

mm

fro

mth

e le

adin

g ed

ge on s

mall f

ine d

otte

d im

ages.

Refe

r to

SM

, pg

. 2-

99 fo

rde

taile

d in

form

atio

n.

10

Dup

lex

To ensu

re go

od

stack

ing

in th

e du

plex

unit,

the

follo

win

g m

odi

ficatio

n h

as be

en app

lied.

1) Th

e du

plex

po

sitio

ning

ro

ller r

otatio

nsp

eed

has

incr

ease

d 1.

6 tim

es fr

om th

eA1

77 s

o th

at th

e po

sitio

ning

ro

ller d

elive

rsth

e pa

per

to th

e du

plex

se

para

tion

sect

ion

whi

le th

e pa

per g

uid

e is

down

.2)

The

posit

ioni

ng ro

ller o

n ti

min

g ca

n be

chan

ged

by SP

mode

(1-

9-1).

It ta

kes

longe

r to

de

liver

seve

rely

cu

rled

pape

r such

as

recy

cled

pap

er or

pape

r whi

chw

as

fed

as

far

as

the

dupl

ex se

para

tion

sect

ion

in th

e du

plex

unit.

In

la

tter

case

, the

pape

r guid

e is

alre

ady

up

for

next

sh

eet o

fpa

per.

The

pape

r gu

ide

cannot g

uid

e th

epa

per.

To so

lve th

e pr

obl

em, a

prog

ram

in

SP m

ode

has

bee

n add

ed.

Refe

r to

SM

, pg

. 4-

16 fo

rde

taile

d in

form

atio

n.

11

Exte

rior/F

ront

door

sO

pera

tors

ca

n ope

n an

d cl

ose

eith

er th

eco

pier

or

the

sorte

r st

apl

er do

or fir

st be

cause

the

copi

er do

or sw

ing

to th

e rig

ht.

For e

xit jam

re

mova

l, it

is ne

cess

ary

to ope

nth

e so

rter

stapl

er do

or fir

st a

nd th

en th

eco

pier

fro

nt d

oor.

Also

, it i

s ne

cess

ary

to

close

the

copi

er fro

nt d

oor f

irst a

nd th

en th

eso

rter

stapl

er do

or.

12

Dev

elo

per

New

de

velo

per i

s us

ed to

st

abi

lize th

etri

boel

ectri

c ch

arge

afte

r a

long

cop

y ru

n(30

0 k).

Th

e ne

w de

velo

per m

ain

tain

s th

etri

boel

ectri

c ch

arge

abilit

y ove

r a lo

ng ti

me.

This

redu

ces

the

poss

ibilit

y of l

ow im

age

dens

ity or

dirty

ba

ckgr

ound.

The

PM cy

cle fo

r re

plac

ing

deve

lope

r is

eve

ry12

0 k.

Dev

elo

per,

Type

9ED

P Co

de: 8

8779

7

Toner

, Ty

pe 6

105

EDP

Code

: 887

801

To pr

eve

nt t

he dr

um

te

mpe

ratu

re fro

min

creasi

ng in

the

cont

inuo

us d

uple

x m

ode

,

the

drum

ha

s 12

ho

les

in e

ach

dru

m fla

nge.

The

new

ty

pe d

rum

ca

n be

inst

alle

d in

the

A175

/A17

6/A1

77 m

ach

ines

.

13

Dru

m

A246

G50

3.W

MF

See

illust

ratio

n.

Ref

er to

SM, pg

. 2-

21 fo

r de

taile

din

form

atio

n.

A175

/A17

6/A1

77A2

46/A

247/

A248

SM5

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

The

key

counte

r ho

lder

is

inst

alle

d at

th

eco

pier

rig

ht fro

nt po

sitio

n fo

r easie

r ope

ratio

n.

The

key

counte

r ho

lder

is

inst

alle

d at

th

eco

pier

rig

ht re

ar

posit

ion.

14

Key

counte

r

A246

G50

4.W

MF

See

illust

ratio

n.

Refe

r to

SM

, pg

. 3-

16/1

7fo

r de

taile

d in

form

atio

n.

15

Verti

cal t

ransp

ort

guid

eTh

e upp

er and

lowe

r tra

nsp

ort g

uid

es ha

vebe

en c

ombi

ned

into

one

part

for

easi

erope

ratio

n of

jam

re

mova

l. Th

e ope

n an

gle

ofth

e up

per

guid

e is

the

sam

e as

that

of

th

elo

wer

guid

e.

Whe

n re

movin

g m

isfed

pape

r in

the v

erti

cal

transp

ort s

ect

ion,

it

is n

ecess

ary

to

ope

n th

eupp

er and

lowe

r ve

rtica

l tra

nsp

ort g

uid

es.

The

ope

n an

gle o

f the

upp

er ve

rtica

ltra

nsp

ort g

uid

e is

narr

ow

er

than

that

of t

helo

wer

verti

cal t

ransp

ort g

uid

es.

Refe

r to

SM

, pg

. 2-

91 fo

rde

taile

d in

form

atio

n.

16

Char

act

er

Thin

Line

Adju

stm

ent

(Gener

atio

n C

opy

Mode

)

Verti

cal t

hin

line

may

be th

icker

than

orig

inal

afte

r ge

ner

atio

n c

opy

. Ve

rtica

l thi

n lin

es c

an

be m

ade

th

inne

r by

lowe

ring

the

toner

dens

ity in

the

deve

lopm

ent u

nit.

V P da

ta ca

nbe

com

pens

ate

d by

SP

mode

(S

P1-13

-4). L

:Th

icker,

N

: Nor

mal,

H: T

hinn

er, H

H: M

uch

Thin

ner

V ID

B =

V P

+

300(V

)

Refe

r to

SM

, pg

. 4-

18 fo

rde

taile

d in

form

atio

n.

Key

Coun

ter

Hol

der

SM6

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

The

press

ure le

vers

se

curin

g m

etho

d ha

sbe

en c

hang

ed.

The

leve

rs ar

e h

ooke

d by

th

esh

aft a

nd h

oles

, and

2 re

tain

ing

rings

hav

ebe

en e

limin

ated.

Thu

s, it

is not

nece

ssary

to

rem

ove

th

e co

nnect

or

brac

ket w

hen

repl

acin

g th

e pr

ess

ure ro

ller a

nd

its be

arin

gsw

ithou

t rem

ovin

g th

e ho

t rolle

r.

Whe

n re

plac

ing

the

press

ure

rolle

r and

itsbe

arin

gs w

ithou

t rem

ovin

g th

e ho

t rolle

r, it

isnece

ssary

to

re

move

th

e pr

ess

ure

le

vers

,

reta

inin

g rin

gs, and

connect

or

brack

et.

17

Fusi

ng/P

ress

ure

rolle

r

A246

G50

1.W

MF

See

illust

ratio

n.

18Fu

sing

Hig

h du

rabi

lity ru

bber

is

use

d fo

r th

epr

ess

ure

ro

ller (

450

k).Th

e PM

cy

cle fo

r re

plac

ing

the

press

ure ro

ller

is e

very

24

0 k.

Refe

r to

SM

, pg

. 5-

2 fo

rde

taile

d in

form

atio

n.

19En

ergy

st

ar

com

plia

ntTh

e Eu

rope

an ve

rsio

n m

ach

ine

meet

s th

eEn

ergy

St

ar gu

idel

ines

for

energ

y ef

ficie

ncy

as

well

as U

S ve

rsio

n m

ach

ines

.

The

Ener

gy St

ar

com

plia

nt, U

S ve

rsio

n on

ly.R

efer

to

SM

, pg

. 2-

115

for

deta

iled

info

rmatio

n.

20

Exte

rior

cove

rsTh

e le

ft and

right

cov

ers

ca

n be

rem

ove

din

depe

nden

tly. Th

e num

bers

of

sc

rew

sre

quire

d fo

r re

movin

g fo

llow

ing

cove

rs ha

vebe

en re

duce

d.O

pera

tion

pane

l (-4),

Up

per c

ove

r (-4

), Rig

htupp

er co

ver

(-4), L

ower

left

& rig

ht c

over

(-2),

Lowe

r re

ar

cove

r (-4

)

To re

move

th

e rig

ht or

the

left

cove

r, it

isnece

ssary

to

re

move

th

e oth

er pa

rts (fr

ont

cove

r, re

ar co

ver,

and

inne

r cove

r).Re

fer

to SM

, pa

ges

6 1

to6-

9 fo

r de

tails

.

Ret

ain

ing

Rin

g

Leve

r

Ret

ain

ing

Rin

g

SM7

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

The

bias

term

inal

(dev

elo

pment r

olle

r sha

ft)do

es n

ot ro

tate

bu

t the

out

side

of t

hede

velo

pment r

olle

r sha

ft ro

tate

s. It

is n

otnece

ssary

to

lu

bric

ate

the

deve

lopm

ent b

ias

term

inal

.

The

bias

term

inal

in th

e de

velo

pment r

olle

rro

tate

s in

the

bias

rece

ptacle

. The

bi

aste

rmin

al m

ust

be

lu

brica

ted.

21

Dev

elo

pment/B

ias

term

inal

lubr

icatio

n

A246

G50

2.W

MF

See

illust

ratio

n.

22

Dup

lex/

Sepa

ratio

nbe

ltTh

e num

ber

of se

para

tion

belts

ha

s be

enre

duce

d fro

m 3

to 1

.

Thre

e s

epa

ratio

n b

elts

are

use

d fo

r du

plex

sepa

ratio

n.Th

e tw

o ty

pes

of be

lt ar

enot i

nter

chan

geabl

e. T

hetw

o ty

pes

of du

plex

unit

are

also

not

in

terc

hang

e-abl

e be

caus

e of

th

edi

ffere

nt c

onne

ctor

s.

A175

/A17

6/A1

77

A246

/A24

7/A2

48

SM8

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

As th

e dr

um

gr

oundi

ng te

rmin

al, a

co

ndu

ctive

brush

and

a c

ondu

ctive

be

arin

g ar

e u

sed.

Itis

not

nec

ess

ary

to

re

plac

e th

ese

parts

at

regu

lar

PM.

The

drum

gr

oundi

ng p

late

co

nta

cts

the

drum

shaf

t rot

ate

d. R

epla

cem

ent a

nd lu

brica

tion

eve

ry 1.

2 M

are

nece

ssary

.

23

Dru

m gr

oundi

ngte

rmin

al

A246

G50

5.W

MF

A246

G50

6.W

MF

See

illust

ratio

n.

A175

/A17

6/A1

77D

rum

G

roundi

ng P

late

A246

/A24

7/A2

48

Brush

Bear

ing

Brush

SM9

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

24

Sorte

r st

apl

er/G

ripTh

ere ar

e 2

m

otors

in

the

grip

ass

embl

y. O

ne

is u

sed

for

ope

ning

and

clo

sing

the

grip

arm

s,in

stead

of so

leno

ids.

The

oth

er (G

rip m

otor)

is us

ed fo

r m

ovin

g th

e gr

ip a

rms.

Th

is re

duce

the

oper

atio

n n

ois

e in

sta

ple

mode

.

Ther

e a

re 2

so

leno

ids

in th

e gr

ip a

ssem

bly.

One is

use

d fo

r ope

ning

and

closin

g th

e gr

iparm

s. Th

e oth

er is

use

d fo

r m

ovin

g th

e gr

iparm

s. Th

e gr

ip m

otor

is us

ed fo

r m

ovin

g th

egr

ip arm

s.

Refe

r to

SM

, pg

. 9-

19/2

1fo

r de

taile

d in

form

atio

n.

25

User

prog

ram

/Thr

ee

stapl

e po

sitio

n

In add

ition to

th

e 4

stapl

e po

sitio

ns (to

p,bo

ttom

, sla

nt, 2

st

apl

e), th

e ope

rato

r ca

nse

lect

eith

er th

e 2

or

3 st

apl

e po

sitio

n b

y use

rpr

ogra

m. W

hen

the

3 st

apl

e po

sitio

n is

sele

cted,

the

indi

catio

n o

n th

e ope

ratio

npa

nel w

ill be

cha

nged

from

2-

stapl

e to

3-

stapl

e.

The

ope

rato

r ca

n s

ele

cts

4 st

apl

e po

sitio

ns(to

p, bo

ttom

, sla

nt, 2

st

apl

e).Re

fer

to SM

, pg

. 4-

52 fo

rde

taile

d in

form

atio

n.

26

Sorte

rst

apl

er/P

unch

wast

e co

llect

ion

box

The

capa

city

of th

e pu

nch

wast

e c

olle

ctio

nbo

x ha

s be

en in

creas

ed.

20 k

sh

eets

(2

hole

s/sh

eet)/1

3 k

shee

ts (3

hole

s/sh

eet)

The

capa

city

of th

e pu

nch

colle

ctio

n bo

x is

as

follo

ws:

7 k

shee

ts (2

hole

s/sh

eet) 5

k s

heet

s (3

hole

s/sh

eet)

Refe

r to

SM

, pg

. 9-

25 fo

rde

taile

d in

form

atio

n.

27

Sorte

rst

apl

er/O

rigin

altra

y

For e

asie

r ope

ratio

n of

th

e ne

xt jo

b or

in th

epl

aten m

ode

, th

e orig

inal

tray

is ad

ded

to th

eto

p of

th

e pr

oof

tra

y in

the

sorte

r st

apl

er.

28So

rter

stapl

er/P

roof

exit

rolle

r

To ensu

re go

od

copy

qu

alit

y in

pro

of m

ode

,

the

proof

exit

ro

ller (

drivi

ng

side)

cont

act

s th

ere

ar

side

(non-

imag

e si

de) to

de

liver

the

copy

pape

r.

In th

e pr

oof

m

ode

th

e pr

oof

exit

ro

ller (

drivi

ng

side

) cont

act

s th

e fr

ont

si

de (im

age

side

) tode

liver

the

copy

pa

per.

Refe

r to

SM

, pg

. 9-

8 fo

rde

taile

d in

form

atio

n.

29

Sorte

rst

apl

er/lim

itles

sso

rt fu

nct

ion:

softw

are

Whe

n m

akin

g m

ore

th

an 2

0 se

ts of

co

pies

,ope

rato

rs ju

st in

put t

he num

ber o

f sets

and

press

the

star

t key.

Th

e ope

rato

r m

ust

then

rem

ove

eve

ry 20

set

s of

co

pies

sta

cked

inth

e 20

bi

ns. T

hen

rese

t the

orig

inal

s, a

ndpr

ess

the

star

t key

again

. The

ope

rato

r ca

nha

ve m

ore

th

an 20

set

s of

co

pies

.

Whe

n m

akin

g m

ore

th

an 2

0 se

ts of

co

pies

,ope

rato

rs h

ave to

di

vide

the

job. T

heope

rato

r als

o ha

s to

in

put t

he s

ettin

gs af

ter

each

20

sets

of

co

pies

is fi

nis

hed.

See

Ope

ratin

gIn

stru

ictio

ns

SM10

A246

/A24

7/A2

48

No.

Sect

ion

/Item

A246

/A24

7/A2

48A1

75/A

176/

A177

Rem

arks

30

Opt

ics/

APS

senso

rTh

e AP

S se

nsor

em

its 2

beam

s (ul

tra re

dlig

ht LE

D) to

sc

an

the

orig

inal

size

. To

dist

ingu

ish

betw

een

LT and

LG pa

per

size

s,anoth

er A

PS s

enso

r (us

ual r

efle

ctive

ty

pe) is

inst

alle

d in

the

US ve

rsio

n.

Ther

e a

re th

ree

refle

ctive

ty

pe s

enso

rs to

dete

ct th

e orig

inal

size

in

pla

ten m

ode

.

Refe

r to

SM

, pg

. 2-

48/4

9fo

r de

taile

d in

form

atio

n.

31

By-pa

ss tr

ay/

Thick

pape

r mode

Whe

n th

e by

-pa

ss pa

per f

eed

key

is pr

ess

ed

twic

e, th

e co

pier

ent

ers

th

e th

ick

pape

r m

ode

.In

th

is m

ode

the

by-pa

ss fe

ed

clut

ch tu

rns

on

twice

, the

fusin

g te

mpe

ratu

re is

co

ntro

lled

ina h

ighe

r th

an n

orm

al m

ode

, the

contin

uous

copy

sp

eed

is re

duce

d, a

nd h

ighe

r tra

nsf

er

curr

ent i

s app

lied

to th

e tra

nsf

er be

lt.

Refe

r to

SM

, pg

. 2-

95 fo

rde

taile

d in

form

atio

n.

SM i A246/A247/A248

TABLE OF CONTENTS

OVERALL INFORMATION

1. OVERALL MACHINE INFORMATION ........................................ 1-11.1 SPECIFICATION ...................................................................................... 1-11.2 MACHINE CONFIGURATION .................................................................. 1-6

1.2.1 COPIER OVERVIEW....................................................................... 1-61.2.2 SYSTEM OVERVIEW...................................................................... 1-6

1.3 COPY PROCESS AROUND THE DRUM................................................. 1-81.4 MECHANICAL COMPONENT LAYOUT................................................. 1-101.5 DRIVE LAYOUT ..................................................................................... 1-121.6 PAPER PATH......................................................................................... 1-13

1.6.1 STANDARD COPYING.................................................................. 1-131.6.2 MULTIPLE 2-SIDE COPYING ....................................................... 1-14

1.7 ELECTRICAL COMPONENT DESCRIPTION........................................ 1-15

DETAILED DESCRIPTIONS

2. DETAILED SECTION DESCRIPTIONS....................................... 2-12.1 PROCESS CONTROL.............................................................................. 2-1

2.1.1 OVERVIEW ..................................................................................... 2-12.1.2 PROCESS CONTROL DATA INITIAL SETTING............................. 2-42.1.3 LATENT IMAGE CONTROL ............................................................ 2-52.1.4 IMAGE DENSITY CONTROL ........................................................ 2-12

2.2 DRUM UNIT............................................................................................ 2-182.2.1 OVERVIEW ................................................................................... 2-182.2.2 OPC DRUM CHARACTERISTICS................................................. 2-192.2.3 DRUM CHARGE............................................................................ 2-202.2.4 ERASE........................................................................................... 2-232.2.5 CLEANING..................................................................................... 2-252.2.6 QUENCHING................................................................................. 2-30

2.3 DRUM CLEANING AND TONER-RECYCLING...................................... 2-312.3.1 TONER TRANSPORT ................................................................... 2-312.3.2 FILTERING .................................................................................... 2-322.3.3 PUMP MECHANISM...................................................................... 2-332.3.4 DRIVE MECHANISM ..................................................................... 2-342.3.5 TONER COLLECTION BOTTLE.................................................... 2-35

2.4 OPTICS .................................................................................................. 2-362.4.1 OVERVIEW ................................................................................... 2-362.4.2 SCANNER DRIVE ......................................................................... 2-372.4.3 VERTICAL LENS DRIVE ............................................................... 2-382.4.4 HORIZONTAL LENS DRIVE.......................................................... 2-392.4.5 HORIZONTAL LENS POSITIONING ............................................. 2-402.4.6 3RD SCANNER DRIVE ................................................................. 2-42

A246/A247/A248 ii SM

2.4.7 OPTICS CONTROL CIRCUIT........................................................ 2-432.4.8 AUTOMATIC IMAGE DENSITY CONTROL SYSTEM (ADS)........ 2-442.4.9 MANUAL IMAGE DENSITY CONTROL ........................................ 2-462.4.10 UNEVEN LIGHT INTENSITY CORRECTION.............................. 2-472.4.11 ORIGINAL SIZE DETECTION IN PLATEN MODE...................... 2-482.4.12 HALF TONE MODE ..................................................................... 2-50

2.5 DEVELOPMENT..................................................................................... 2-512.5.1 OVERVIEW ................................................................................... 2-512.1.2 DEVELOPMENT MECHANISM..................................................... 2-522.1.3 DRIVE MECHANISM ..................................................................... 2-532.1.4 CROSSMIXING ............................................................................. 2-542.1.5 DEVELOPMENT BIAS................................................................... 2-552.1.6 TONER SUPPLY ........................................................................... 2-60

2.6 IMAGE TRANSFER................................................................................ 2-642.6.1 PRE-TRANSFER LAMP ................................................................ 2-642.6.2 IMAGE TRANSFER AND PAPER SEPARATION OVERVIEW ..... 2-652.6.3 IMAGE TRANSFER AND PAPER SEPARATION MECHANISM... 2-662.6.4 TRANSFER BELT UNIT LIFT MECHANISM ................................. 2-682.6.5 PAPER TRANSPORTATION AND BELT DRIVE MECHANISM.... 2-692.6.6 TRANSFER BELT CLEANING MECHANISM................................ 2-702.6.7 TONER COLLECTION MECHANISM............................................ 2-712.6.8 TRANSFER ANTI-CONDENSATION HEATER............................. 2-72

2.7 PAPER FEED......................................................................................... 2-732.7.1 OVERVIEW ................................................................................... 2-732.7.2 FRR FEED SYSTEM ..................................................................... 2-742.7.3 SLIP CLUTCH MECHANISM......................................................... 2-762.7.4 FRR FEED DRIVE MECHANISM .................................................. 2-772.7.5 SEPARATION ROLLER RELEASE MECHANISM ........................ 2-792.7.6 PAPER RETURN MECHANISM.................................................... 2-802.7.7 PAPER SKEW PREVENTION MECHANISM ................................ 2-812.7.8 PAPER LIFT MECHANISM............................................................ 2-822.7.9 PAPER NEAR END/PAPER END DETECTION............................ 2-852.7.10 TANDEM FEED TRAY................................................................. 2-862.7.11 PAPER SIZE DETECTION .......................................................... 2-902.7.12 VERTICAL TRANSPORT MECHANISM ..................................... 2-912.7.13 TRAY POSITIONING MECHANISM ............................................ 2-922.7.14 BY-PASS FEED TABLE .............................................................. 2-952.7.15 PAPER REGISTRATION............................................................. 2-982.7.16 REGISTRATION DRIVE MECHANISM ....................................... 2-992.7.17 GUIDE PLATE RELEASE MECHANISM................................... 2-100

2.8 IMAGE FUSING.................................................................................... 2-1012.8.1 OVERVIEW ................................................................................. 2-1012.8.2 FUSING ENTRANCE GUIDE ...................................................... 2-1022.8.3 FUSING DRIVE MECHANISM..................................................... 2-1032.8.4 FUSING LAMP CONTROL .......................................................... 2-1042.8.5 INVERTER AND PAPER EXIT .................................................... 2-1052.8.6 INVERTER AND EXIT DRIVE MECHANISM............................... 2-106

2.9 DUPLEX ............................................................................................... 2-1072.9.1 OVERVIEW ................................................................................. 2-107

SM iii A246/A247/A248

2.9.2 DRIVE MECHANISM ................................................................... 2-1082.9.3 DUPLEX ENTRANCE TO DUPLEX TRAY .................................. 2-1092.9.4 DUPLEX STACKING ................................................................... 2-1102.9.5 DUPLEX PICK-UP ROLLER MECHANISM................................. 2-1112.9.6 DUPLEX PAPER FEED............................................................... 2-112

2.10 ENERGY STAR COMPLIANT MACHINES(ALL THE DESTIMATIONS)............................................................... 2-115

2.11 ENERGY SAVING INFORMATION .................................................... 2-1172.11.1 ABOUT THE ENERGY SAVING FEATURES OF

THIS COPIER............................................................................ 2-117

INSTALLATION

3. INSTALLATION PROCEDURE ................................................... 3-13.1 INSTALLATION REQUIREMENTS .......................................................... 3-1

3.1.1 ENVIRONMENT .............................................................................. 3-13.1.2 MACHINE LEVEL ............................................................................ 3-13.1.3 MINIMUM SPACE REQUIREMENTS.............................................. 3-23.1.4 POWER REQUIREMENTS.............................................................. 3-2

3.2 COPIER (A246/A247/A248)...................................................................... 3-33.2.1 ACCESSORY CHECK..................................................................... 3-33.2.2 INSTALLATION PROCEDURE........................................................ 3-43.2.3 GUIDANCE ROM INSTALLATION

(OPTION: EUROPE VERSION ONLY)......................................... 3-143.2.4 PLATEN COVER (OPTION) INSTALLATION................................ 3-153.2.5 KEY COUNTER HOLDER INSTALLATION (OPTION).................. 3-163.2.6 ORIGINAL TRAY INSTALLATION (OPTION)................................ 3-18

3.3 UNIVERSAL TRAY (TRAY 2) ................................................................. 3-193.4 550 SHEETS PAPER TRAY (TRAY 3) ................................................... 3-203.5 TANDEM FEED TRAY PAPER SIZE CHANGE (TRAY 1) ..................... 3-223.6 DUAL JOB FEEDER (A610) ................................................................... 3-25

3.6.1 ACCESSORY CHECK................................................................... 3-253.6.2 INSTALLATION PROCEDURE...................................................... 3-26

3.7 SORTER STAPLER (A821).................................................................... 3-293.7.1 ACCESSORY CHECK................................................................... 3-293.7.2 INSTALLATION PROCEDURE...................................................... 3-303.7.3 SORTER ADAPTER INSTALLATION (OPTION)........................... 3-34

3.8 20 BIN SORTER STAPLER (A658) (A246 ONLY) ................................. 3-363.8.1 ACCESSORY CHECK................................................................... 3-363.8.2 INSTALLATION PROCEDURE...................................................... 3-37

3.9 LCT (A822) ............................................................................................. 3-413.9.1 ACCESSORY CHECK................................................................... 3-413.9.2 INSTALLATION PROCEDURE...................................................... 3-423.9.3 PAPER SIZE CHANGE ................................................................. 3-46

3.10 TRANSPORTATION REMARKS .......................................................... 3-493.10.1 TONER RECYCLING TUBE CLEANING..................................... 3-493.10.2 OTHER OPERATIONS................................................................ 3-49

A246/A247/A248 iv SM

SERVICE TABLES

4. SERVICE TABLES...................................................................... 4-14.1 GENERAL CAUTIONS ............................................................................. 4-1

4.1.1 DRUM .............................................................................................. 4-14.1.2 DRUM UNIT..................................................................................... 4-14.1.3 CHARGE CORONA......................................................................... 4-24.1.4 OPTICS ........................................................................................... 4-24.1.5 ERASE LAMP.................................................................................. 4-34.1.6 DEVELOPMENT UNIT .................................................................... 4-34.1.7 TRANSFER BELT UNIT .................................................................. 4-34.1.8 CLEANING SECTION...................................................................... 4-44.1.9 PRE-TRANSFER LAMP .................................................................. 4-44.1.10 PAPER FEED ................................................................................ 4-44.1.11 FUSING UNIT ................................................................................ 4-44.1.12 USED TONER ............................................................................... 4-5

4.2 SERVICE PROGRAM MODE................................................................... 4-64.2.1 SERVICE PROGRAM MODE OPERATION.................................... 4-64.2.2 SERVICE PROGRAM MODE TABLES ........................................... 4-84.2.3 INPUT CHECK............................................................................... 4-454.2.4 OUTPUT CHECK........................................................................... 4-48

4.3 USER PROGRAM .................................................................................. 4-514.3.1 HOW TO ENTER AND EXIT UP MODE........................................ 4-514.3.2 UP MODE TABLE.......................................................................... 4-51

4.4 TEST POINTS/DIP SWITCHES/LEDS ................................................... 4-534.4.1 DIP SWITCHES............................................................................. 4-534.4.2 TEST POINTS ............................................................................... 4-534.4.3 FUSES........................................................................................... 4-544.4.4 LEDS ............................................................................................. 4-54

4.5 SPECIAL TOOLS AND LUBRICANTS ................................................... 4-544.5.1 SPECIAL TOOLS........................................................................... 4-544.5.2 LUBRICANTS ................................................................................ 4-54

4.6 TOUCH PANEL DISPLAY POSITION ADJUSTMENT ........................... 4-55

PREVENTIVE MAINTENANCE

5. PREVENTIVE MAINTENANCE SCHEDULE............................... 5-15.1 PM TABLE................................................................................................ 5-15.2 PM PROCEDURE .................................................................................... 5-5

5.2.1 CLEARING PM COUNTER.............................................................. 5-55.2.2 PM PROCEDURE............................................................................ 5-6

REPLACEMENT AND ADJUSTMENT

6. REPLACEMENT AND ADJUSTMENT........................................ 6-16.1 EXTERIOR AND INNER COVER REMOVAL........................................... 6-1

6.1.1 FRONT COVER............................................................................... 6-1

SM v A246/A247/A248

6.1.2 REAR SIDE...................................................................................... 6-26.1.3 INNER COVER................................................................................ 6-36.1.4 RIGHT SIDE .................................................................................... 6-66.1.5 LEFT SIDE....................................................................................... 6-76.1.6 OPERATION PANEL ....................................................................... 6-86.1.7 UPPER COVER............................................................................... 6-9

6.2 PAPER FEED......................................................................................... 6-106.2.1 PAPER TRAY UNIT REMOVAL .................................................... 6-106.2.2 PAPER TRAY REMOVAL.............................................................. 6-136.2.3 PAPER FEED ROLLERS REPLACEMENT................................... 6-166.2.4 PAPER FEED TIMING ADJUSTMENT.......................................... 6-176.2.5 PAPER FEED CLUTCH REMOVAL

(1ST TRAY PAPER FEED CLUTCH)........................................... 6-206.2.6 REAR FENCE RETURN SENSOR REPLACEMENT .................... 6-246.2.7 REAR FENCE HP SENSOR REPLACEMENT.............................. 6-256.2.8 BOTTOM PAPER SENSOR REPLACEMENT............................... 6-266.2.9 BY-PASS FEED TABLE REMOVAL .............................................. 6-276.2.10 BY-PASS FEED ROLLERS REPLACEMENT ............................. 6-286.2.11 BY-PASS PAPER SIZE SENSOR REPLACEMENT ................... 6-296.2.12 BY-PASS FEED CLUTCH AND GUIDE PLATE SOLENOID

REMOVAL ................................................................................... 6-316.2.13 REGISTRATION MOTOR REMOVAL ......................................... 6-336.2.14 PAPER DUST CLEANER CLEANING......................................... 6-346.2.15 REGISTRATION SENSOR CLEANING....................................... 6-356.2.16 UNIVERSAL TRAY SIZE SWITCH REPLACEMENT .................. 6-366.2.17 550-SHEET TRAY SET SWITCH REPLACEMENT .................... 6-376.2.18 LIFT MOTOR REMOVAL............................................................. 6-386.2.19 PAPER FEED MOTOR REMOVAL ............................................. 6-396.2.20 COPIER FEED UNIT REMOVAL................................................. 6-406.2.21 BOTTOM PLATE LIFT WIRE REPLACEMENT........................... 6-426.2.22 550 SHEETS PAPER TRAY (TRAY 3) ........................................ 6-446.2.23 TANDEM FEED TRAY PAPER SIZE CHANGE .......................... 6-46

6.3 OPTICS .................................................................................................. 6-496.3.1 EXPOSURE GLASS REMOVAL.................................................... 6-496.3.2 EXPOSURE LAMP REPLACEMENT ............................................ 6-506.3.3 OPTICS THERMOSWITCH REPLACEMENT ............................... 6-526.3.4 SCANNER HP SENSOR REPLACEMENT ................................... 6-536.3.5 ADS SENSOR REMOVAL............................................................. 6-546.3.6 SCANNER DRIVE MOTOR ........................................................... 6-556.3.7 SCANNER DRIVE WIRES REPLACEMENT................................. 6-566.3.8 THIRD SCANNER REMOVAL....................................................... 6-726.3.9 THIRD SCANNER DRIVE MOTOR/HP SENSOR

REPLACEMENT............................................................................ 6-736.3.10 LENS HORIZONTAL DRIVE HP SENSOR REPLACEMENT...... 6-756.3.11 LENS HORIZONTAL DRIVE MOTOR REPLACEMENT ............. 6-776.3.12 APS SENSOR ADJUSTMENT (SENSITIVITY DOWN) ............... 6-796.3.13 ARS SENSOR ADJUSTMENT .................................................... 6-80

6.4 TONER RECYCLING ............................................................................. 6-816.4.1 TONER RECYCLING UNIT REMOVAL......................................... 6-81

A246/A247/A248 vi SM

6.4.2 TONER RECYCLING CLUTCH REPLACEMENT ......................... 6-826.5 DEVELOPMENT AND TONER SUPPLY................................................ 6-83

6.5.1 DEVELOPMENT UNIT REMOVAL................................................ 6-836.5.2 DEVELOPER REPLACEMENT ..................................................... 6-856.5.3 DEVELOPMENT ROLLERS REPLACEMENT .............................. 6-876.5.4 TONER DENSITY SENSOR REPLACEMENT.............................. 6-896.5.5 TONER BOTTLE DRIVE MOTOR REPLACEMENT ..................... 6-906.5.6 DEVELOPMENT FILTER AND PRESSURE RELEASE FILTER

REPLACEMENT............................................................................ 6-916.5.7 DEVELOPMENT ROLLER SHAFT CLEANING............................. 6-92

6.6 DRUM UNIT............................................................................................ 6-936.6.1 DRUM UNIT REMOVAL AND OPC DRUM REPLACEMENT........ 6-936.6.2 QUENCHING LAMP REPLACEMENT .......................................... 6-946.6.3 GRID PLATE/CHARGE WIRE/WIRE CLEANER

REPLACEMENT............................................................................ 6-956.6.4 ERASE LAMP AND DRUM POTENTIAL SENSOR

REPLACEMENT............................................................................ 6-976.6.5 CLEANING BLADE REPLACEMENT ............................................ 6-986.6.6 CLEANING BRUSH REPLACEMENT ........................................... 6-996.6.7 PICK-OFF PAWL REPLACEMENT ............................................. 6-1006.6.8 OZONE FILTER REPLACEMENT............................................... 6-1016.6.9 PRE-TRANSFER LAMP REMOVAL............................................ 6-102

6.7 TRANSFER BELT UNIT ....................................................................... 6-1036.7.1 TRANSFER BELT UNIT REMOVAL/INSTALLATION ................. 6-1036.7.2 TRANSFER BELT REPLACEMENT............................................ 6-1056.7.3 CLEANING BLADE REPLACEMENT .......................................... 6-107

6.8 FUSING UNIT....................................................................................... 6-1086.8.1 FUSING UNIT REMOVAL ........................................................... 6-1086.8.2 FUSING THERMISTOR REPLACEMENT................................... 6-1096.8.3 FUSING THERMOFUSE REPLACEMENT ................................. 6-1106.8.4 FUSING LAMP REPLACEMENT................................................. 6-1116.8.5 OIL SUPPLY/CLEANING ROLLER REPLACEMENT.................. 6-1136.8.6 OIL SUPPLY CLEANING BRUSH REPLACEMENT ................... 6-1146.8.7 HOT ROLLER REPLACEMENT .................................................. 6-1156.8.8 PRESSURE ROLLER AND BEARING REPLACEMENT ............ 6-1176.8.9 FUSING STRIPPER PAWL REPLACEMENT.............................. 6-1196.8.10 FUSING PRESSURE ADJUSTMENT........................................ 6-1206.8.11 PAPER EXIT UNIT REMOVAL.................................................. 6-1216.8.12 EXIT SENSOR AND FUSING EXIT SENSOR

REPLACEMENT........................................................................ 6-1236.8.13 DUPLEX PAPER GUIDE SENSOR AND DUPLEX

TRANSPORT SENSOR REPLACEMENT................................. 6-1246.8.14 PRESSURE ROLLER CLEANING ROLLER

REPLACEMENT........................................................................ 6-1256.9 DUPLEX UNIT ...................................................................................... 6-126

6.9.1 FEED ROLLER REPLACEMENT ................................................ 6-1266.9.2 SEPARATION BELT REPLACEMENT ........................................ 6-1286.9.3 DUPLEX UNIT REMOVAL........................................................... 6-131

SM vii A246/A247/A248

6.9.4 SEPARATION CLUTCH/TRANSPORT CLUTCH REMOVAL ......6-1326.9.5 JOGGER MOTOR REPLACEMENT ............................................6-133

6.10 COPY QUALITY ADJUSTMENT.........................................................6-1386.10.1 SP ADJUSTMENT MODE ..........................................................6-1386.10.2 SIDE-TO-SIDE REGISTRATION ADJUSTMENT.......................6-1406.10.3 UNEVEN EXPOSURE ADJUSTMENT.......................................6-1416.10.4 IMAGE DENSITY ADJUSTMENT...............................................6-1436.10.5 SCANNER HEIGHT ADJUSTMENT...........................................6-1446.10.6 APS SIZE CALIBRATION...........................................................6-1456.10.7 FUSING EXIT COVER MAGNET POSITIONING

ADJUSTMENT ...........................................................................6-146

TROUBLESHOOTING

7. TROUBLESHOOTING ................................................................ 7-17.1 SERVICE CALL CONDITIONS .................................................................7-1

7.1.1 SUMMARY .......................................................................................7-17.1.2 EXPOSURE......................................................................................7-37.1.3 SCANNER........................................................................................7-57.1.4 LENS MAGNIFICATION...................................................................7-87.1.5 OPTICS THERMISTOR..................................................................7-107.1.6 CHARGE CORONA UNIT ..............................................................7-107.1.7 DEVELOPMENT ............................................................................7-117.1.8 PROCESS CONTROL SENSORS .................................................7-127.1.9 TRANSFER CURRENT..................................................................7-157.1.10 DRUM...........................................................................................7-157.1.11 PAPER FEED...............................................................................7-167.1.12 DUPLEX .......................................................................................7-197.1.13 FUSING ........................................................................................7-207.1.14 SYSTEM CONTROL ....................................................................7-227.1.15 DUAL JOB FEEDER.....................................................................7-237.1.16 SORTER STAPLER .....................................................................7-247.1.17 OTHERS.......................................................................................7-28

7.2 ELECTRICAL COMPONENT DEFECTS ................................................7-307.2.1 SENSORS ......................................................................................7-307.2.2 SWITCHES.....................................................................................7-347.2.3 FUSES............................................................................................7-35

7.3 FIRMWARE HISTORY ............................................................................7-36

DUAL JOB FEEDER A610

1. OVERALL MACHINE INFORMATION........................................ 8-11.1 SPECIFICATIONS.....................................................................................8-11.2 COMPONENT LAYOUT............................................................................8-2

1.2.1 MECHANICAL COMPONENT LAYOUT...........................................8-21.2.2 ELECTRICAL COMPONENT LAYOUT............................................8-3

1.3 ELECTRICAL COMPONENT DESCRIPTION...........................................8-4

Rev. 10/2000

A246/A247/A248 viii SM

2. DETAILED DESCRIPTION.......................................................... 8-62.1 ORIGINAL PICK-UP MECHANISM .......................................................... 8-62.2 SEPARATION AND FEED MECHANISM................................................. 8-72.3 FRICTION BELT DRIVE MECHANISM .................................................... 8-82.4 ORIGINAL SIZE DETECTION.................................................................. 8-92.5 TRANSPORT MECHANISM................................................................... 8-11

2.5.1 BASIC OPERATION...................................................................... 8-112.5.2 THIN/THICK ORIGINAL MODES................................................... 8-13

2.6 ORIGINAL FEED-OUT MECHANISM..................................................... 8-142.7 TRANSPORT BELT LEVELING MECHANISM ...................................... 8-152.8 LIFT MECHANISM ................................................................................. 8-162.9 SPECIAL FEATURES............................................................................. 8-17

2.9.1 PRESET MODE............................................................................. 8-172.9.2 TWO-SIDED ORIGINAL FEED (AUTO REVERSE) MODE........... 8-182.9.3 COMBINE TWO ORIGINALS MODE............................................. 8-19

2.10 TIMING CHARTS WITH ORIGINAL MISFEED DETECTION............... 8-222.10.1 A4 SIDEWAYS: ONE-SIDED, TWO ORIGINALS........................ 8-222.10.2 COMBINE TWO ORIGINALS MODE........................................... 8-232.10.3 A4 SIDEWAYS: TWO-SIDED, TWO ORIGINALS ....................... 8-24

3. SP MODE .................................................................................. 8-253.1 SERVICE TABLES ................................................................................. 8-25

3.1.1 DIP SWITCHES AND SWITCH ..................................................... 8-253.1.2 VARIABLE RESISTORS................................................................ 8-263.1.3 LEDS ............................................................................................. 8-263.1.4 FUSE ............................................................................................. 8-26

4. REPLACEMENTS AND ADJUSTMENTS ................................. 8-274.1 UPPER COVER REMOVAL ................................................................... 8-274.2 TRANSPORT BELT REPLACEMENT.................................................... 8-284.3 FEED ROLLER REPLACEMENT ........................................................... 8-304.4 FRICTION BELT REPLACEMENT ......................................................... 8-314.5 SENSORS REPLACEMENT .................................................................. 8-32

4.5.1 ORIGINAL SET/FEED, REGISTRATION-1/-2, ANDORIGINAL WIDTH-1/-2/-3 SENSOR REPLACEMENT.................. 8-32

4.6 FEED-OUT UNIT REMOVAL.................................................................. 8-334.7 FEED-OUT MOTOR REPLACEMENT ................................................... 8-344.8 INVERTER SOLENOID REMOVAL AND ADJUSTMENT ...................... 8-354.9 FEED-OUT SENSOR REPLACEMENT.................................................. 8-364.10 INVERTER ROLLER REPLACEMENT................................................ 8-374.11 DF POSITION/APS START SENSOR REPLACEMENT ...................... 8-384.12 BELT DRIVE MOTOR REPLACEMENT............................................... 8-394.13 FEED-IN UNIT REMOVAL.................................................................... 8-404.14 FEED-IN MOTOR REPLACEMENT ..................................................... 8-414.15 FRICTION BELT MOTOR REPLACEMENT......................................... 8-424.16 FEED-IN CLUTCH REPLACEMENT .................................................... 8-43

SM ix A246/A247/A248

4.17 STOPPER SOLENOID REPLACEMENT ............................................. 8-444.18 VERTICAL REGISTRATION ADJUSTMENT ....................................... 8-45

4.18.1 ONE-SIDED THIN ORIGINAL MODE.......................................... 8-454.18.2 TWO-SIDED ORIGINAL MODE................................................... 8-47

4.19 SIDE-TO-SIDE REGISTRATION ADJUSTMENT................................. 8-494.20 ADJUSTIN PLATE REMOVAL ............................................................. 8-50

4.20.1 PREVENTING THE REAR SIDE OF ORIGINALS FROMPBECOMING DIRTY ................................................................... 8-50

SORTER STAPLER A821

1. OVERALL MAHCINE INFORMATION ........................................ 9-11.1 SPECIFICATIONS.................................................................................... 9-11.2 COMPONENT LAYOUT ........................................................................... 9-4

1.2.1 MECHANICAL COMPONENT LAYOUT.......................................... 9-41.2.2 DRIVE LAYOUT............................................................................... 9-5

1.3 ELECTRICAL COMPONENT DESCRIPTION.......................................... 9-6

2. DETAILED DESCRIPTION.......................................................... 9-82.1 BASIC OPERATION................................................................................. 9-8

2.1.1 NORMAL (PROOF MODE) AND SORT/STACK MODE.................. 9-82.1.2 STAPLE MODE ............................................................................. 9-11

2.2 TURN GATE SECTION .......................................................................... 9-132.3 BIN DRIVE MECHANISM....................................................................... 9-142.4 BIN HOME POSITION............................................................................ 9-152.5 JOGGER SECTION................................................................................ 9-162.6 BIN REAR PLATE DRIVE SECTION...................................................... 9-182.7 GRIP ASSEMBLY................................................................................... 9-19

2.7.1 GRIP MOTOR................................................................................ 9-202.7.2 GRIP SHIFT MOTOR .................................................................... 9-21

2.8 STAPLE UNIT......................................................................................... 9-222.8.1 STAPLE UNIT DRIVE MECHANISM............................................. 9-222.8.2 STAPLER ...................................................................................... 9-232.8.3 PUNCH MECHANISM ................................................................... 9-252.8.4 STAPLE UNIT PULLED-OUT MECHANISM ................................. 9-26

2.9 JAM DETECTION................................................................................... 9-272.10 TIMING CHART.................................................................................... 9-28

2.10.1 SORTER/STAPLER TIMING CHART (PROOF MODE) .............. 9-282.10.2 SORTER/STAPLER TIMING CHART (STAPLE MODE) ............. 9-29

3. SP MODE .................................................................................. 9-303.1 SERVICE TABLES (MAIN CONTROL BOARD)..................................... 9-30

3.1.1 DIP SWITCHES............................................................................. 9-303.1.2 PUNCH POSITION........................................................................ 9-313.1.3 TEST POINTS ............................................................................... 9-313.1.4 FUSES........................................................................................... 9-31

A246/A247/A248 x SM

4. REPLACEMENTS AND ADJUSTMENTS ................................. 9-324.1 EXTERIOR COVER REMOVAL ............................................................. 9-324.2 STAPLER REMOVAL AND REINSTALLATION..................................... 9-334.3 JOGGER PLATE REMOVAL AND INSTALLATIOIN.............................. 9-344.4 BINS REMOVAL..................................................................................... 9-354.5 MAIN MOTOR REMOVAL...................................................................... 9-394.6 GRIP ASSEMBLY REMOVAL ................................................................ 9-404.7 UPPER GRIP ASSEMBLY REMOVAL................................................... 9-414.8 GRIP SHIFT MOTOR REMOVAL........................................................... 9-424.9 GRIP MOTOR AND SENSORS REMOVAL ........................................... 9-43

4.9.1 GRIP MOTOR/GRIP MOTOR HP SENSOR/GRIP SHIFT MOTOR HP SENSOR REMOVAL............................ 9-43

4.10 MAIN CONTROL BOARD REPLACEMENT......................................... 9-444.11 STAPLE POSITION ADJUSTMENT..................................................... 9-454.12 PUNCH POSITION ADJUSTMENT STANDARD ................................. 9-464.13 HELICAL WHEELS REMOVAL ............................................................ 9-474.14 PUNCH UNIT REMOVAL ..................................................................... 9-52

20-BIN SORTER STAPLER A658

1. OVERALL MACHINE INFORMATION ...................................... 10-11.1 SPECIFICATIONS.................................................................................. 10-11.2 COMPONENT LAYOUT ......................................................................... 10-2

1.2.1 MECHANICAL COMPONENT LAYOUT........................................ 10-21.2.2 DRIVE LAYOUT............................................................................. 10-31.2.3 ELECTRICAL COMPONENT DESCRIPTION ............................... 10-4

2. DETAILED DESCRIPTION........................................................ 10-52.1 BASIC OPERATION............................................................................... 10-5

2.1.1 NORMAL MODE AND SORT/STACK MODE................................ 10-52.1.2 STAPLE MODE ............................................................................. 10-72.1.3 BIN DRIVE MECHANISM .............................................................. 10-82.1.4 BIN HOME POSITION ................................................................... 10-92.1.5 JOGGER MECHANISM............................................................... 10-102.1.6 GRIP ASSEMBLY........................................................................ 10-112.1.7 STAPLER UNIT ........................................................................... 10-122.1.8 STAPLER SWITCH ..................................................................... 10-132.1.9 PAPER FEED AND MISFEED DETECTION TIMING.................. 10-142.1.10 JAM DETECTION...................................................................... 10-16

3. REPLACEMENT AND ADJUSTEMENT ................................. 10-173.1 EXTERIOR COVER REMOVAL ........................................................... 10-17

3.1.1 FRONT COVER........................................................................... 10-173.1.2 REAR COVER ............................................................................. 10-17

SM xi A246/A247/A248

3.1.3 TOP COVER.................................................................................10-173.1.4 LOWER COVER...........................................................................10-17

3.2 GRIP ARM REPLACEMENT .................................................................10-193.3 BIN REMOVAL ......................................................................................10-203.4 TRANSPORT MOTOR REMOVAL........................................................10-21

LARGE CAPACITY TRAY A822

1. OVERALL MACHINE INFORMATION....................................... 11-11.1 SPECIFICATIONS.................................................................................. 11-11.2 MECHANICAL COMPONENT LAYOUT................................................. 11-21.3 ELECTRICAL COMPONENT DESCRIPTION ........................................ 11-3

2. DETAILED DESCRIPTION......................................................... 11-42.1 MECHANICAL OPERATION .................................................................. 11-42.2 PAPER LIFT MECHANISM .................................................................... 11-52.3 PAPER END DETECTION ..................................................................... 11-7

3. REPLACEMENTS AND ADJUSTMENTS.................................. 11-83.1 EXTERIOR COVER REMOVAL ............................................................. 11-8

3.1.1 FRONT COVER REMOVAL .......................................................... 11-83.1.2 REAR LOWER COVER REMOVAL............................................... 11-83.1.3 TOP COVER REMOVAL ............................................................... 11-8

3.2 PAPER FEED ROLLERS REPLACEMENT............................................ 11-93.3 LCT FEED CLUTCH REMOVAL ...........................................................11-103.4 UPPER COVER SWITCHES REMOVAL ..............................................11-113.5 SIDE-TO-SIDE REGISTRATION ADJUSTMENT..................................11-12

APPENDIX

1.0 DUPLEX JAM TROUBLESHOOTING GUIDE ............................A1

REV. 05/99

SM A246/A247/A248a

IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY1. Before disassembling or assembling parts of the copier and peripherals,

make sure that the copier power cord is unplugged.2. The wall outlet should be near the copier and easily accessible.3. Note that some components of the copier and the paper tray unit are

supplied with electrical voltage even if the main switch is turned off.4. If any adjustment or operation check has to be made with exterior covers off

or open while the main switch is turned on, keep hands away from electrifiedor mechanically driven components.

5. The inside and the metal parts of the fusing unit become extremely hot whilethe copier is operating. Be careful to avoid touching those components withyour bare hands.

6. The copier is not attached to the table. Pushing the copier too heard maycause it to drop onto the floor. While moving the copier, push the table.

7. When the main switch is tuned on, the machine will suddenly start turning toperform the developer initialization. Keep hand away from any mechanicaland electrical components during this period.

HEALTH SAFETY CONDITIONS1. Never operate the copier without the ozone filters installed.2. Always replace the ozone filters with the specified ones at the specified

intervals.3. Toner and developer are non-toxic, but if you get either of them in your eyes

by accident, it may cause temporary eye discomfort. Try to remove with eyedrops or flush with water as first aid. If unsuccessful, get medical attention.

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS1. The copier and its peripherals must be installed and maintained by a

customer service representative who has completed the training course onthose models.

CAUTION: The RAM board on the main control board has a lithium batterywhich can explode if replaced incorrectly. Replace the RAM boardonly with an identical one. The manufacturer recommends replacingthe entire RAM board. Do not recharge or burn this battery. UsedRAM board must be handled in accordance with local regulations.

A246/A247/A248 SMb

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL1. Do not incinerate the toner cartridge or the used toner. Toner dust may ignite

suddenly when exposed to open flame.2. Dispose of used toner, developer, and organic photoconductor according to

local regulations. (These are non-toxic supplies.)3. Dispose of replaced parts in accordance with local regulations.4. When keeping used RAM boards in order to dispose of them later, do not put

more than 100 RAM boards per sealed box. Storing larger numbers or notsealing them apart may lead to chemical reactions and heat build-up.

OVERALL INFORMATIONSORTER STAPLER A821

APPENDIX

DETAILED DESCRIPTIONS20 BIN SORTER STAPLER A658

INSTALLATIONLARGE CAPACITY TRAY A822

SERVICE TABLES

PREVENTIVE MAINTENANCE

REPLACEMENT AND ADJUSTMENT

TROUBLESHOOTING

DUAL JOB FEEDER A610

TAB

POSI

TIO

N 2

TAB

POSI

TIO

N 1

TAB

POSI

TIO

N 3

TAB

POSI

TIO

N 4

TAB

POSI

TIO

N 6

TAB

POSI

TIO

N 5

TAB

POSI

TIO

N 8

TAB

POSI

TIO

N 7

Rev. 05/99

OVERALL INFORMATION

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SM 1-1 A246/A247/A248

1. OVERALL MACHINE INFORMATION1.1 SPECIFICATIONConfiguration: ConsoleCopy Process: Dry electrostatic transfer systemToner Supply Control: Fuzzy ControlPhotoconductor: OPC drumOriginals: Sheet/BookOriginal Size: Maximum A3/11" x 17"Original Alignment: Left rear cornerCopy Paper Size: Maximum A3/11" x 17" (Tray & By-pass)

A4/81/2" x 11" (Tandem LCT)Minimum A5/51/2" x 81/2" (Tray)

A4/81/2" x 11" (Tandem LCT)A6/51/2" x 81/2" (By-pass)

Duplex Copying: Maximum A3/11" x 17"Minimum A5/51/2" x 81/2" (Sideways)

Copy Paper Weight: Paper tray: 52 ~ 128 g/m2, 14 ~ 34 lbBy-pass feed table: 52 ~ 200 g/m2, 14 ~ 53 lbDuplex copying: 64 ~ 104 g/m2, 17 ~ 24 lb

Reproduction Ratios: 4 Enlargement and 5 Reduction + Create Margin(93%)

A4/A3 Version LT/LDG Version

Enlargement200%141%122%115%

200%155%129%121%

Full Size 100% 100%

Reduction

82% 75% 71% 65% 50%

85% 77% 74% 65% 50%

SPECIFICATION

A246/A247/A248 1-2 SM

Power Source: 115 V, 60 Hz, more than 20 A (for N.A)220 ~ 240 V, 50 Hz/60 Hz, more than 10 A (forEurope and Asia)

Power Consumption: - A246 copier -Copier only Full system*1

Warm up 1.20 kVA 1.22 kVAStand-by*2 0.22 kVA 0.24 kVA

Low Power mode*2 0.185 kVA 0.205 kVACopying 1.40 kVA 1.40 kVA

Maximum 1.70 kVA 1.75 kVAOff-mode 0.001 kVA 0.001 kVA

- A247 copier -Copier only Full system*1




- A248 copier -Copier only Full system*1




*1Full System:

Mainframe with dual job feeder, sorter staplerand 3,500-sheet large capacity tray

*2: When the anti-condensation heaters are off.

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SM 1-3 A246/A247/A248

Noise Emission: Sound Pressure Level:The measurements are made according toISO7779

- A246 copier -Sound pressure level (The measurements are made according to ISO 7779 at

the operator position.)Copier only

Stand-by Less than 34 dB (A)Copying Less than 57 dB (A) (average)

Sound power level (The measurements are made according to ISO 7779.)Copier only












SPECIFICATION

A246/A247/A248 1-4 SM

Dimensions:Width Depth Height

Copier only 690 mm27.2"

698 mm27.6"

980 mm38.6"

Copier with dual job feeder, sorter stapler,and 3,500-sheet large capacity tray

1,659 mm65.4"

698 mm27.6"

1,113 mm43.9"

Copier with dual job feeder, sorter stapler withpunch, and 3,500-sheet large capacity tray

1,659 mm65.4"

698 mm27.6"

1,113 mm43.9"

Weight: Copier only: (Without the optional platen cover= Approximately 2 kg)

Approximately 175 kgZoom: From 50% to 200% in 1% steps

Copying Speed: A4/LT (sideways) A3/DLT B4/LG

A246 copier51 (A4 others)50 (A4/in France)50 (LT)

26 32

A247 copier 60 31 38A248 copier 70 36 44

Warm-up Time: Less than 5 minutes (A246 copier, 20C)Less than 5.5 minutes (A247/A248 copier, 20C)

First Copy Time:(A4/51/2" x 11" sidewaysfrom the 1st feed station)

3.1 seconds (A246 copier)2.6 seconds (A247/A248 copiers)

Copy Number Input: Number keys, 1 to 999 (count up or count down)Manual Image DensitySelection:

9 steps

Automatic Reset: 1 minute standard setting; can also be set from 1second to 999 seconds or no auto reset.

Copy Paper Capacity: By-pass feed table: approx. 50 sheets Paper tray: approx. 550 sheets Tandem LCT tray: approx. 1,550 x 2=3100

sheetsToner Replacement: 1,160 g/cartridgeDeveloper Replacement: 1 Kg bag, black only.

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SPECIFICATION

SM 1-5 A246/A247/A248

Optional Equipment: Platen cover (A528-04) Dual job feeder (A610) 20 bin sorter stapler (Floor type) (A821-17:

Ricoh, -22: NRG, -15: Savin/Ges U.S.A. 26:Infotec)

3,500-sheet Large capacity tray (A822) Receiving tray (A446-05) Key Counter Bracket D (A509-03) 20 bin sorter Stapler (Floor type) with punch

(A821-57 (3 holes), -67 (2 holes): Ricoh, -62:NRG, -66: Infotec, -55: Savin/Ges U.S.A.)

Guidance ROM KIT Type U (A870) (Language) Editing sheet (spare part) Original Tray type F (A430-07) Sorter Adapter type L (A902-19) 20 bin sorter

ricoh ft-7950 service manual

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