rg200 - schematic a
DESCRIPTION
Randall Amp RG200 Schematic ATRANSCRIPT
-
12
34
56
78
ABCD
87
65
43
21
D C B A
RG200-A
IC1b
IC2b
IC1a
IC4a
IC4b
IC5b
IC6b
IC3a
R1 15K
R4 15K
R2 510K
R14
1K
R3 510K
R5 5K1
R6 6K8
C1 472
C2 472
C11
22U
/25VC1
333
3C12
333
R15
22K
R16
22K R
17 8K2
R19
3K3
R18
47K
R20
3K3
R12
2K2
R10
220K
R11
7K5
R26
680R
R13
100K
R27
47K
R8 22K
C14
333
C15
100P
C16
224
VR5
30C5
0K
C17
0U47
/50V
Q3 K30A Q4 K30A
VR7
C250
K
C22
220P
C24
0U47
/50V
C23
NP0
U47
/50V
C3 250P
VR3
B50K
VR1
A50
K
VR2
A5K
C4
NP0U47/50V
C5 224
R9 180K
C7 100P
C9 102
C8 683
C10
22U
/25V
VR4
B50K
Q12
K30
A
C36
47P
R43
680K
R44
1K
R132
1M
R131
1M
C38
1U/5
0V
C43
22U
/25V
R45
10K R
4622
0K
R49
47K
22K
R133
1M
R29
180K
R28
3K3
R41
220K
R32
1K
Q2 K30A
C31
220P
R33
47K
R34
47K
C32
104
C35
224
C33
152R3
62K
2C2
756
0P
VR1
1A
50K
C29
473
VR1
0B5
0K
C28
473
R39
220K
C30
333
R38
62K
R37
22K
C76
473
C34
NP0U47/50V
C73
473
R40
430R
R35
1K
VR1
2B5
0K
VR9
B100
K
R134
1MC3
94U
7/50
V
C48
10U
/25V
Q5 K30A
R53
1K
JK1
INPUT
C64U
7/50
V
TRE BASS
MID
LEV
EL
GA
IN2
IC2a
IC3b
R21
470K
R22
220K
R24
47K
R23
1KR2
5
47K
LED
1RE
D
LED
2RE
D
C18
680P
C19
473
C20
223
C21
473
VR6
B50K
C74
473
C75
473
CONT
OUR
C25
10U
/25V
C37
22U
/25V
LEV
EL
VR8
B50K
MID
TRE
BASS
JK2
JK3
VR1
3B1
00K
SEN
DRE
TURN
C42
223
C45
100P
C47
104
C46
104
C51
470P
C49
302
C50
822
C57
104
C59
102
R50
47K
R52
15R
R51
22K
I/PO
/PCN
4CN
3IC
6a
IC11
b IC11
a
IC5a
IC10
bIC
10a
IC7a
IC7b
R55
2K2
R54
100K
R56
100K
R60
10K
R61
10K
R78
220K
R59
10K
R81
47K
R74
1M
R90
220K
R94
100K
VR1
4B5
0K
20C20K
VR16
C1M
VR1
5
GA
IN1
S.LEV
R.LEV
VOL
LAST
C52
1U/5
0V
C61
100U
/16V
C62
2U2/
50V
C54
1U/5
0V
C53
4U7/
50V
C66
10U
/25V
C70
10U
/25V
R80
100K
R79
82K
Q10
2SC1
815G
R
Q92S
C181
5GR
R73
33K
R721K2
R69
510K
R67
15K
R71
4K7
R77
150K
R70
1K2
R68
1K2
R63
10K
R64
10K
C56
103
C55
47P
R65
100K
+9V
5
1
37 8
26
4
24
86 3
57
1
BL32
07
BL31
02
REVERB
R91
47K
R92
47K
R93
47K
R97
100K
R95
100K
R140
1M
R99
100K
C63
560P
C79
473
C65
100P
C64
182
CHO
RUS
LAST
+9V
R102
100K
R96
100K
R98
100KR1
0151
KR1
0310
0K
C67
47P C
68 47P
R100
100K
R107
47K
R106
47K
R108 1K R109
1K
R104
1K R105 1K
LAST
REV
ERB
CHO
RUS
LAST
REV
ERB
CHO
RUS
C69
10U
/25V
C95
2200
U/2
5V
C94
2200
U/2
5V
C72
10U
/25V
C71
10U
/25V
B50K
X 2
VR1
7
Q14
A10
15GR
Q15
A10
15GR
Q13
A10
15GR
R115
220K
R110
6K2
R112
12K
R116
22K
R113
100K
LED
4G
REEN
LED
3RE
D
R114
22K
R111
100K
SW2
SW1
+15
-15
JK5
GA
IN S
EL
CN1
Q17
A10
15GR
Q18
A10
15GR
Q16
A10
15GR
R122
220K
R118
6K2
R119
12K
R123
22K
R120
100K
LED
6
GRE
EN
LED
5RE
D
R121
22K
R117
100K
+15
SW3
CHO
RUS
BD1
BR36
C88
104
C93
104
C92
104
C90
220U
/25V
C91
220U
/25V
C89
104
LED
7Y
EL
Q21
A10
15GR
R129
100K
R130
22K
R128
15K
Q20
A10
15GR
R125
100K
R127
22K
R126
6K2
+15
V
-15
V
-15
V
CH.S
EL
LINE OUT
TO AMP
-15
V
+15
V
Q7A
1015
GR
R137
100K
R138
22K
R136
15K
-15
V+
15V
R135
1M
Q6 K30A
C77
473
R42
1M
ON
DRI
VE
ON
CL. O
FF
GAIN1 OFF
GAIN2 ON
REV
.ON
CHO.ONCHO
.ON
ONCL
.OFF
DR.
ON
GA
IN2
ON
GA
IN1
OFF
C78
473
R139
1M
Q8K
30A
REV
. ON
FROM TRANS.
7815
7915
C40
22P
C41
22U
/25V
R47
15K
R48
10K
RATE
DEPTH
MA
STER
JK6
IC12
IC13
IC8
IC9
R7 1KC8
010
4
123
5 67
C81
104
12 3
5 67
C82
104
C83
104
123
123
56
7
5 67
3 21
C84
104
R58
C85
104
123
123
C86
104
567
12 3
12 3
L R
756
C26
100P
R30
33K
R31
3K9
Q1K
30A
C44
102
R57
22K
Q19
A10
15GR
R124
100K
CL.OFF
R62
47K
+9V
R89
56K
2 3 41
1 2 3 4 5
+15
V
-15
V
+15
V
8
8
4
-15
V4
78
5 6+15
V
+15
V 8-15
V 4
+15
V
-15
V
84
12 3
SCN
6
CN5
CN7
CN8
+15
V-15
V
-15
V4
-15
V4
+15
V8
+15
V8
4
-15
V
756
REV
./CH
O.
CH./G
AIN
Del
ete
the
boar
d fo
r R
G-7
5
68
7
45
R66
100K
+9V
HA
1735
8
HA17358
+9V
R82
220R
78L0
9IC
14
C60
100U
/16V
+15
V+
9V
R76
820R
R75
5K6
C58
100U
/16V
D11
D12
1N41
48 X
2
D10
D9
1N41
48 X
2
D1
D2
1N41
48 X
2
D3
D4
1N4148 X 2
D14 D
151N
4148
X 2
D8
D7
1N41
48 X
3
D16
D13
D17
1N4148 X 2
1N41
48D
19
1N41
48D
18
D6
D5
1N41
48 X
2
D20
D1N
4004
R83
33R/
2W
C87
330U
/25V
CN10
TO F
AN
R14
22K
7
1 of
207
/05/
2002
RX
24K
CX 104