Service manual

Vertical Deflection
Caution: When you suspect the Vertical Deflection circuitry, please be careful. Because
there is a DC voltage on the vertical deflection, the beam current can damage the CRT
neck, leading to a defective CRT.
The best thing to do is:
1. Interrupt pin 3 of connector 0224 on the CRT panel (diagram F), in order to
remove the 'filament' voltage from the tube (no beam current, so no chance of
destroying the CRT).
2. Measure with a multimeter, or better with an oscilloscope, the functionality of the
Frame stage.
3. After you have found the cause, exchange the defective component (e.g.,
TDA8177), and re-solder the interrupted pin 3.