Acer AL512 AL512 Monitor Service Guide - Page 29

AL512/513 Service Manual 10.3. NO SOUND Speaker No Sound Earphone no sound Check Volume No Control Pin 1&7 Voltage 0.4~0.85V ? Yes Adjust OSD Volume control to Max. and Check Pin 1&7 Voltage >0.4V No Yes Check Q010 Collector has PWM output ? Yes Check if I601 Pin 4 No Vp=12V ? Check R602 & R605 is OK ? Check if Speaker is OK ? Yes Yes Change I601 TDA7057AQ Yes -28- 9/20/2002