AL512/513 Service Manual
-28-
9/20/2002
10.3. NO SOUND
Speaker
No
Sound
Check Volume
Control Pin 1&7
Voltage 0.4~0.85V ?
Adjust OSD
Volume control
to Max. and
Check Pin 1&7
Voltage >0.4V
Check Q010
Collector has
PWM output ?
No
Check
R602 & R605 is
OK ?
Check if Speaker is
OK ?
Check if I601 Pin 4
Vp=12V ?
No
Yes
No
Yes
Change I601
TDA7057AQ
Yes
Yes
Yes
Earphone
no sound
Yes
Summary of Contents for AL512
Page 19: ...AL512 AL513 9 20 2002 18 9 1 MAIN PCB TOP VIEW 9 PCB LAYOUT ...
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Page 21: ...AL512 AL513 9 20 2002 20 9 3 CON PCB TOP VIEW ...
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Page 23: ...9 5 AUDIO IN PCB TOP VIEW AL512 AL513 9 20 2002 22 ...
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Page 25: ...9 7 POWER PCB TOP VIEW AL512 AL513 9 20 2002 24 ...
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