Acer AL513 Panduan Servis - Halaman 29

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Acer AL513 Panduan Servis
AL512/513 Service Manual

10.3. NO SOUND

Speaker
No
Sound
Check Volume
Control Pin 1&7
Voltage 0.4~0.85V ?
Yes
Check if I601 Pin 4
Vp=12V ?
Yes
Change I601
TDA7057AQ
Earphone
no sound
Adjust OSD
Volume control
No
to Max. and
Check Pin 1&7
Voltage >0.4V
Check
No
R602 & R605 is
OK ?
Yes
Check Q010
No
Collector has
PWM output ?
Yes
Yes
Check if Speaker is
OK ?
Yes