Acer AL2021, Руководство по обслуживанию

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2. No Characters , Missing one Color
No Characters
Missing one color
Check 1.8V , 2.5V
, 3.3V Output ?
Check or Change U6 ,U3, U4
Check U1?
Change Inverter
No
Check X’TAL X1
14.318Mhz ?
Check H,V
SYNC ?
Change X1
Check Panel or Change
Connector (30Pin) or Cable
Change VGA Cable
Change U5 or Main board
No
YES
YES
YES
YES
YES
Check CN2 pin Output
From U5 to LCD panel ?
Check Inverter
And CN2 OK ?
No NO
Change U1
NO
No
No
3. No Audio
NO AUDIO
Check Speaker
OK ?
Check Connector
CN6, Cable
Change Speaker
Check
U5 PinAD7 Mute ?
U9 Pin11 Volume ?
Change Cable
Change U5 or U9
Check OSD Control
Mute and Volume ?
Check Input Signal
CN9 OK ?
Check Signal Source
Or change CN9
Change Main Board
OK
OK
OK
OK
OK
NO
NO
NO
NO
Change XU1
NO