ACER AL502 (Service Manual)

Сервис мануал и схема монитора Acer AL502​

• 1. No display of screen (Screen is black, color of LED is amber)
• 2. Nothing displays on screen (Screen is black, color of LED is green)
• 3. Checking the back light unit
• 4. Abnormal screen
• 5. No OSD display
• 6. Abnormal plug and play operation
• 6.1 Abnormal DDC2
• 7. Checking the interface circuit of sync signal
• 7.1 Checking the control circuit of horizontal sync pulse
• 7.2 Checking the control circuit ofvertical sync pulse
• 8. Checking the resolution change IC movement
• 9. No power on
• 9.1 No power on (I)
• 9.2 No power on (II)
• 10. Checking theDC/DC converter circuit
• 11. Checking the operation of CPU
• 12. Checking the audiocircuit
• 13. Checking inverterboard circuit