Philips DVD 580M, Service Manual, Page: 22 / 60

Diagnostic Software, Trouble Shooting and Test Instructions
EN 22 DVD580M 5.
5.3.5 No Analog Audio Output on Cinch
Figure 5-5
Video output is normal but no analogue audio output
Check point:
pins 2, 3, 4, 5 of U5 (6-Channel audio D/A converter)
Observe :
Signal present at those pins but no signal at pin 25,
and 27.
Solution : Replace U5
Yes
Solution :
check the IC U302 at front control board
Check point: Q12 on decoder board
Observe : the voltage presented at collector terminal of
Q12
Check point: U9 at decoder board
Observe : the output voltage of U9
Solution : Replace U9
Solution : check the power supply
circuit
Yes
Signal is presented
No
No
No
Yes
Check point: Q12 on decoder board
Observe : the stable low voltage presented at BASE
terminal of Q12
Yes
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