LG PF-43A20, Service Manual

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NO PICTURE/NO SOUND
(RASTER OK)
Does the Auto search
operate normal?
Is the CVBS signal at
Pin 4 of P101A normal?
GO TO
NO PICTURE Block
NO SOUND Block
Check the voltage
of Tuner (33V, 5V)
Check pins 20,21,
22,39 of IC1
Check/Replace
ZD101, ZD102,
R106, R108
Check IF Board
No
OK
OK
NG No
Yes
Yes
NO RASTER
(SOUND OK)
Check the voltage of
CPT Heater
Check the voltage of
CPT,HV, SCREEN
Check/Replace
CPT Board
Check the Heater pulse
at pin 3 of P45PR
Check/Replace
Connector, FR402
Check/Replace
T401
Check/Replace
T401
Abnormal
Normal
Abnormal
Abnormal
Normal
Normal