Service Manual
41
3. Power (include IF +5Vand +3.3V) supply normal but LED
off and no display
4. 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 but LED
function ok 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 ST2010 - 20" LCD Monitor
Страница 1: ...Service Manual 0 Service Manual LCD Monitor ST2010 ...
Страница 20: ...Service Manual 19 ...
Страница 21: ...Service Manual 20 8 Key Parts Pin Assignments 8 1 U105 TSUMU58EDJ LF ...
Страница 22: ...Service Manual 21 ...
Страница 23: ...Service Manual 22 ...
Страница 24: ...Service Manual 23 ...
Страница 27: ...Service Manual 26 Chapter 4 Disassembly Assembly 1 Exploded Diagram ...
Страница 30: ...Service Manual 29 3 ST2010 Assembly Block ...
Страница 32: ...Service Manual 31 ...
Страница 60: ...Service Manual 59 Attachment 2 Schematic 1 Interface board schematic ...
Страница 68: ...Service Manual 67 power board schematic 1 ...
Страница 69: ...Service Manual 68 ...
Страница 70: ...Service Manual 69 ...
Страница 72: ...Service Manual 71 Attachment 3 PCB Layout Power inverter board Top Layer ...
Страница 73: ...Service Manual 72 Bottom Layer ...
Страница 74: ...Service Manual 73 I F board Top Layer Bottom Layer ...
Страница 75: ...Service Manual 74 Keypad ...
Страница 76: ...Service Manual 75 ...