Television 1 Jess UEAB 2006 Television Horizontal Section

Television 1 Jess UEAB 2006 Comparison o f a black and white television Horizontal section Booth drive sawtooth signal that runs to the deflection yoke. Booth drive sawtooth signal that runs to the deflection yoke. Booth have high voltage about 30,000V and about 20,000 for black and white. Booth have high voltage about 30,000V and about 20,000 for black and white. Picture tubes that uses high voltage electrostatic focus requiring approximately 6,000 volts Picture tubes that uses high voltage electrostatic focus requiring approximately 6,000 volts Booth have the output stage Booth have the output stage For colored it requires anti-pincushioning circuits these are not found In a B & W For colored it requires anti-pincushioning circuits 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 UEAB 2006 Horizontal Output Amplifier Colored Television horizontal output is just the same as the Black and white Flyback function Flyback function Flyback acts as step down transformer between horizontal amplifier and the yoke Flyback acts as step down transformer between horizontal amplifier and the yoke Act as stepdown transformer supply AC voltage for the picture tube heater and rectifier. Act as stepdown transformer supply AC voltage for the picture tube heater and rectifier. Supplies retrace pulses for the use of other sources. (AGC, AFC and horizontal retrace blanking Supplies retrace pulses for the use of other sources. (AGC, AFC and horizontal retrace blanking

Television 1 Jess UEAB 2006 Horizontal Scanning Center to the right Supply is given to the electron beam of the picture tube Supply is given to the electron beam of the picture tube Retrace Retrace

Television 1 Jess UEAB 2006 Controls in the horizontal Section Horizontal Hold Horizontal Hold Horizontal line Horizontal line Focus Focus Horizontal width Horizontal width High voltage adjust High voltage adjust

Television 1 Jess UEAB 2006 Problems Picture width Picture width Blurred picture Blurred picture Horizontal line Horizontal line Picture rolling sideways Picture rolling sideways Distorted pictures Distorted pictures

Television 1 Jess UEAB 2006 Typical Horizontal output Amplifier Black and White

Television 1 Jess UEAB 2006 Horizontal Output Stage

Television 1 Jess UEAB 2006 Horizontal deflection illustration

Television 1 Jess UEAB 2006 Voltage and current relationship

Television 1 Jess UEAB 2006 Horizontal output amplifier

Television 1 Jess UEAB 2006 Horizontal output used in color

Television 1 Jess UEAB 2006 Flyback

Effect of open balancing

Television 1 Jess UEAB 2006 Narrow raster due to shorted Turns in flyback

Television 1 Jess UEAB 2006 Horizontal keystone

Television 1 Jess UEAB 2006 Horizontal Output Amplifier Controls

Television 1 Jess UEAB 2006 Basic High Voltage Circuit

Television 1 Jess UEAB 2006 Split high voltage flyback Transformer

Television 1 Jess UEAB 2006

High Voltage Focus power supply

Television 1 Jess UEAB 2006 High-Voltage Divider Focus

Television 1 Jess UEAB 2006 High voltage hold-down circuit used in transistor

Television 1 Jess UEAB 2006 Horizontal frequency hold-Down circuit

Television 1 Jess UEAB 2006 Horizontal Output With High Voltage

Television 1 Jess UEAB 2006 Block Diagram Zenith Horizontal Deflection

Television 1 Jess UEAB 2006 Zenith Self-regulation system

Television 1 Jess UEAB 2006

Using SCR in deflection associated with waveform

Television 1 Jess UEAB 2006 Vacuum Tube Horizontal output

Television 1 Jess UEAB 2006