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5.
Check RAGC item of IC bus is
set "00".
YES
Use the remote controller and
enter S-MODE and adjust
RAGC to near 2D
6.
YES
Replace V622 or joint.
RASTER OK, NO PICTURE, NO SOUND
Whether there are noise dots?
NO
Check picture IF channel
and V231, V212, N201
YES
Aerial system or tuner
breaks down.
Check if V622 is rosin joint or break?
YES
Check V621, R621
Maintenance Service and Trouble shooting
Whether there are voltages in
every pin of tuner
NO
NO red
Check the voltage of pin 1 at XS602
Check the circuit between pin 18 at N201 and
pin 3 at XS261
20
YES
Check the circuit between
CPU and tuner.
NO
NO
NO
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