14
TROUBLESHOOTING
3. VIDEO circuit
1. In case of no EE screen
In case of no
EE Screen
Is there video input
signal at pin
9,19,12,14,18,20 of IC304 ?
YES
YES
YES
NO
NO
NO
NO
YES
YES
Is there oscillating clock at pin
6,7 of IC304?
Case A.
PVR S-Video output/ DVD S-Video output
Pin12:Inspect C367 (Tuner,
Scart1, Scart2 input)
Is there signal at pin
1,3,28 of IC109?
Inspect C389,R196, R676,
R678,R686,R687,C651,C652
NO
NO
NO
Pin10:Inspect C392
(DVD input)
Is there signal at pin
7,9,11,13,14,15 of P505
Inspect power of
P822
NO
NO
NO
Pin20:Inspect C369
(Front input)
Inspect 3.3V of the power
Inspect IC303 and
peripheral circuit
Inspect C400,C401 and
X301
Case B.
PVR CVBS output/DVD CVBS output
Case C.
PVR RGB output/DVD RGB output
Inspect R722,R726,
D701,D702
Inspect FFC cable of the
loader
Pin14,18:Inspect C393,C395,
R352,R353(S-Video input)
Inspect IC109
Is there 3.3V at pin 1,8,25, 33, 43, 51,
58, 68,75,83,93 of IC304?
NO
Is there 3.3V at pin 11,17,23 of
IC304?
NO
YES
YES
Содержание DHD-4000D
Страница 30: ...29 BLOCK DIAGRAM VIDEO BLOCK ...
Страница 32: ...31 BLOCK DIAGRAM TUNER BLOCK ...
Страница 40: ...39 SCHEMATIC DIAGRAM ...
Страница 44: ...43 SCHEMATIC DIAGRAM SCHEMATIC DIAGRAM ...
Страница 45: ...44 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW ...
Страница 49: ......
Страница 66: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp ...