Haier 21F99, Service Manual

Page: 27 / 45

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