Picture Does Not Appear Normally. (Ext. Input); Picture Does Not Appear Normally. (Tuner Input) - Philips 42PFL3704D/F7 Service Manual

FLOW CHART NO.3

Picture does not appear normally. (EXT. input)

Are the video signals inputted to each pin of IC401?
IC401 3PIN VIDEO-IN 1
IC401 1PIN Y-IN 1
IC401 9PIN C-IN 1
IC401 7PIN VIDEO-IN 2
IC401 5PIN Y-IN 2
IC401 11PIN C-IN 2
IC401 43PIN COMPONENT-Y-IN
IC401 47PIN COMPONENT-Pb-IN
IC401 52PIN COMPONENT-Pr-IN
Are the video signals outputted to each pin of IC401?
IC401 38PIN CVBS/Y/S-Y-IN
IC401 36PIN Pb-IN
IC401 34PIN Pr/S-C-IN
Replace Digital Main CBA Unit or LCD Module
Assembly.
FLOW CHART NO.4

Picture does not appear normally. (Tuner input)

No
Yes
No
Yes
No
Yes
Check the line between video input terminal and
each pin of IC401.
→ JK703
IC401 3PIN
→ JK702
IC401 1PIN
→ JK702
IC401 9PIN
→ JK707
IC401 7PIN
→ JK706
IC401 5PIN
→ JK706
IC401 11PIN
→ JK717
IC401 43PIN
→ JK718
IC401 47PIN
→ JK719
IC401 52PIN
Is 5V voltage supplied to the Pin(2, 29, 33, 39, 44) of IC401?
Is 8.2V voltage supplied to the Pin(12) of IC401?
Yes
Replace IC401.
8-5
VIDEO-IN 1
Y-IN 1
C-IN 1
VIDEO-IN 2
Y-IN 2
C-IN 2
COMPONENT-Y-IN
COMPONENT-Pb-IN
COMPONENT-Pr-IN
No
A91H2TR