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Trouble Shooting Chart
No Video
Signal present at
some of resistors
Check CVBS jacks, S-video jacks,
Y/ Pb /Pr jacks
Solution:
?
if not any signal at all resistor
Replace U1 (ALI M3351)
Check if any poor contact between
34 and Cn503
Solution: Replace if Q6,Q7, Q4,
Q5 damaged
NO
Audio output is normal
but no Video
Check point:
R87, RP2, RP5, RP6 On the main board
Observe: Is there any video output signal
Board is shot circuit manually.
Check point:
L12, L11, L6,L4,L9,L7 on main board
Observe: open circuit
Check point: pin2,4,5,6,7,8
Of Cn503 on power board
Observe: open happen
NO
NO
YES
YES
4-4
GO
CVBS(R96 point) waveform
Содержание DVD590M
Страница 30: ...FRONT BOARD Top Side 7 3 7 3 FRONT BOARD Bottom Side ...
Страница 35: ...KARAOKE ECHO BOARD 8 4 KARAOKE AMPLIFIER BOARD 8 4 ...
Страница 39: ...POWER AV BOARD 9 3 9 3 ...
Страница 41: ...MAIN ENCASING EXPLODED VIEW 10 1 ...
Страница 43: ...Version 1 0 Initial release REVISION LIST 11 1 ...