Acer AL513 Manual de serviço - Página 28
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AL512/513 Service Manual
10.2. NO DISPLAY
Check Power
region
Refer to NO POWER
trouble shoot flow char
No
Display
Dark
Check LED Color
Green
Press Power key
ON/OFF is OK ?
(See LED is green or
dark.)
Yes
Press "1" key if OSD
menu is on display ?
Yes
Check I001 MVZ if
RST Pin#155 have
reset pulse ?
Yes
Check X101 Crystal
12MHz is working ?
Yes
Check J105,J106
data bus have signal
Yes
Check panel Powers
VDDD=3.3V
VDDA=9.2V
VDDG=18V
VEEG=-6V
Yes
Change LCD panel
Amber
Check IO cable is
connect OK ?
Amber & Green
Check X100 Crystal
12MHz is working?
Yes
No
Check uP I105
Reset is Ok ?
No
No
Check Keypad
pcb is OK ?
Yes
Check if
Inverter is Ok ?
Check uP I105
No
pin#24 send reset ?
pulse ?
Yes
No
Change X101
No
Change I001 LCD
controller IC
Yes
Check I/P signal is in
pwr saving state?
No
Check I002 is OK ?
Yes
Change
I105
Check Reset circuit
Q113,D113
No
Change
Inverter