Compaq Flat Panel Monitor tft5017m, Service Manual

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13
AUDIO-MODULE Trouble shooting chart
NO VOICE OUTPUT
Use OHM-METER measure U8 pin 3, 5
(channel-A ) is speaker well connected?
Measure U8 pin 16,18 ( channel B) is speaker
well connected ?
Plug-out the DC power , make sure
the monitor is in OFF status .
Check CN7,CN11 is well
connected?
Check is speaker open circuit ?
Plug-in the DC power, set the monitor
ON status .
Check Dc to Dc block 5V
Check U8 pin 4,17 = VDD 5V
Check CN8 pin 1,4 have signal ?
Check U8 pin 3,5,16,18 have
signal ?
Replace U8
no
yes
YES
no
no
yes
yes
yes
Replace Audio Cable
no
yes
Check U8 pin 6,15 have signal ?
End
yes