Acer AL513 Manuale di servizio - Pagina 28
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AL512/513 Service Manual
10.2. NO DISPLAY
Dark
Check Power
region
Refer to NO POWER
trouble shoot flow char
No
Display
Amber
Check LED Color
Amber & Green
Check X100 Crystal
Green
12MHz is working?
Press Power key
No
ON/OFF is OK ?
(See LED is green or
dark.)
Yes
No
Press "1" key if OSD
menu is on display ?
Yes
Check I001 MVZ if
No
RST Pin#155 have
pin#24 send reset ?
reset pulse ?
Yes
Yes
No
Check X101 Crystal
12MHz is working ?
Yes
No
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
-27-
Yes
Check IO cable is
Check I/P signal is in
connect OK ?
pwr saving state?
Check I002 is OK ?
Yes
Yes
Check uP I105
Reset is Ok ?
No
Check Reset circuit
Check Keypad
pcb is OK ?
Yes
No
Check if
Inverter is Ok ?
Check uP I105
pulse ?
Change X101
Change I001 LCD
controller IC
No
Change
I105
Q113,D113
Change
Inverter
9/20/2002