television 1 jess role @ ueab 2006 television horizontal section
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Television 1 Jess Role @ UEAB 2006
Television Television Horizontal Horizontal
SectionSection
Television 1 Jess Role @ UEAB 2006
Comparison o f a black and Comparison o f a black and white television Horizontal white television Horizontal
sectionsection Booth drive sawtooth signal that runs to the Booth drive sawtooth signal that runs to the
deflection yoke.deflection yoke. Booth have high voltage about 30,000V and Booth have high voltage about 30,000V and
about 20,000 for black and white.about 20,000 for black and white. Picture tubes that uses high voltage Picture tubes that uses high voltage
electrostatic focus requiring approximately electrostatic focus requiring approximately 6,000 volts6,000 volts
Booth have the output stageBooth have the output stage For colored it requires anti-pincushioning For colored it requires anti-pincushioning
circuits these are not found In a B & Wcircuits these are not found In a B & W B & W have less radiation compare to colored B & W have less radiation compare to colored
Television 1 Jess Role @ UEAB 2006
Horizontal Output AmplifierHorizontal Output AmplifierColored Television Colored Television
horizontal output is just the horizontal output is just the same as the Black and same as the Black and
whitewhite Flyback functionFlyback function Flyback acts as step down transformer Flyback acts as step down transformer
between horizontal amplifier and the yokebetween horizontal amplifier and the yoke Act as stepdown transformer supply Act as stepdown transformer supply
AC voltage for the picture tube heater AC voltage for the picture tube heater and rectifier.and rectifier.
Supplies retrace pulses for the use of Supplies retrace pulses for the use of other sources. (AGC, AFC and other sources. (AGC, AFC and horizontal retrace blankinghorizontal retrace blanking
Television 1 Jess Role @ UEAB 2006
Horizontal Scanning Center Horizontal Scanning Center to the rightto the right
Supply is given to the electron beam Supply is given to the electron beam of the picture tubeof the picture tube
RetraceRetrace
Television 1 Jess Role @ UEAB 2006
Controls in the Controls in the horizontal Sectionhorizontal Section
Horizontal HoldHorizontal Hold Horizontal lineHorizontal line FocusFocus Horizontal width Horizontal width High voltage adjustHigh voltage adjust
Television 1 Jess Role @ UEAB 2006
ProblemsProblems
Picture widthPicture width Blurred picture Blurred picture Horizontal lineHorizontal line Picture rolling sidewaysPicture rolling sideways Distorted picturesDistorted pictures
Television 1 Jess Role @ UEAB 2006
Typical Horizontal output Amplifier Black and White
Television 1 Jess Role @ UEAB 2006
Horizontal Output StageHorizontal Output Stage
Television 1 Jess Role @ UEAB 2006
Horizontal deflection Horizontal deflection illustrationillustration
Television 1 Jess Role @ UEAB 2006
Voltage Voltage and and
current current relationsrelations
hiphip
Television 1 Jess Role @ UEAB 2006
Horizontal output Horizontal output amplifieramplifier
Television 1 Jess Role @ UEAB 2006
Horizontal output used Horizontal output used in colorin color
Television 1 Jess Role @ UEAB 2006
FlybacFlybackk
Television 1 Jess Role @ UEAB 2006
Effect of open balancingEffect of open balancing
Television 1 Jess Role @ UEAB 2006
Narrow raster due to Narrow raster due to shorted Turns in flybackshorted Turns in flyback
Television 1 Jess Role @ UEAB 2006
Horizontal keystoneHorizontal keystone
Television 1 Jess Role @ UEAB 2006
Horizontal Output Amplifier Horizontal Output Amplifier ControlsControls
Television 1 Jess Role @ UEAB 2006
Basic High Voltage Basic High Voltage CircuitCircuit
Television 1 Jess Role @ UEAB 2006
Split high voltage flyback Split high voltage flyback TransformerTransformer
Television 1 Jess Role @ UEAB 2006
Television 1 Jess Role @ UEAB 2006
High Voltage Focus power High Voltage Focus power supplysupply
Television 1 Jess Role @ UEAB 2006
High-Voltage Divider High-Voltage Divider FocusFocus
Television 1 Jess Role @ UEAB 2006
High voltage hold-down High voltage hold-down circuit used in transistorcircuit used in transistor
Television 1 Jess Role @ UEAB 2006
Horizontal frequency hold-Horizontal frequency hold-Down circuitDown circuit
Television 1 Jess Role @ UEAB 2006
Horizontal Output With Horizontal Output With High VoltageHigh Voltage
Television 1 Jess Role @ UEAB 2006
Block Diagram Zenith Block Diagram Zenith Horizontal DeflectionHorizontal Deflection
Television 1 Jess Role @ UEAB 2006
Zenith Self-regulation Zenith Self-regulation systemsystem
Television 1 Jess Role @ UEAB 2006
Television 1 Jess Role @ UEAB 2006
Using SCR in deflection Using SCR in deflection associated with waveformassociated with waveform
Television 1 Jess Role @ UEAB 2006
Vacuum Tube Horizontal Vacuum Tube Horizontal outputoutput
Television 1 Jess Role @ UEAB 2006