Service Manual
45
Power(include IF +5Vand +3.3V) supply normal but LED off and no
display
Power(include IF +5Vand +3.3V) supply and display normal only
LED off
Is the frequency 14.318MHz at
#128 of
IF Board U105?
Change crystal X101
NO
Yes
Is the low active reset signal at #108 of
IF Board U105 normal?
NO
Change C164
Yes
Is the serial clock signal at #6 of IF
Board U108 normal when power AC on?
NO
Change U105
Yes
Change U108
NO
Is the keypad cable connective OK
Reassembly or changing
Yes
Is the LED control signal at 123# of
U105high-low convertible when DC on/off
NO
NO
Change Q107
Is the key function OK?
NO
Press power key to DC on the monitor,if
display ok the process is end,if no
display see the no backlight process
Yes
Upgrade Firmware to Serial Flash U108
by VGA port with ISP_Tool V4.100.exe
Yes
Is R165 open?
yes
Change R165
Is Q107 work normal?
NO
Yes
Change U105
NO
Is LED at keypad work OK
Change LED
NO
Yes
END
Change U105
NO
Содержание 2209WA - UltraSharp - 22" LCD Monitor
Страница 1: ...Service Manual 0 Service Manual LCD Monitor 2209WA ...
Страница 25: ...Service Manual 24 8 Key Parts Pin Assignments 8 1 U105 TSUMU58EHJ LF ...
Страница 26: ...Service Manual 25 ...
Страница 27: ...Service Manual 26 ...
Страница 31: ...Service Manual 30 ...
Страница 32: ...Service Manual 31 Chapter 4 Disassembly Assembly 1 Exploded Diagram ...
Страница 36: ...Service Manual 35 Note 1 The arrows point out the direction of assembly ...
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Страница 81: ...Service Manual 80 Attachment 3 PCB Layout power inverter bd inverter board Top Layer Bottom Layer ...
Страница 82: ...Service Manual 81 Main board Top Layer ...
Страница 83: ...Service Manual 82 Bottom Layer ...
Страница 84: ...Service Manual 83 Keypad USB convert board ...
Страница 85: ...Service Manual 84 ...