Service Manual
43
Change U105
6. Power (include IF +5Vand +3.3V) supply normal ,key
function OK,but backlight can’t be turned on
Backlight cannot be turned on,is the
on-off control signal come from IF ok?
Is the CN851
inserted CN101 OK?
NO
Yes
Is the on-off control signal #109 of U105
high-low convertible when DC on/off
NO
Yes
Is the
voltage
13Vat T1
PIN3/4
Check
T850 or
F850
NO
Yes
Yes
Check U1
pin2 Voltage
is 5V
Yes
Check U1
pin6Voltage is
High
Check
CN851
NO
YES
Check U1 pin1 and pin2 Oupput
Change Q1
Yes
Check
U1
NO
Содержание ST2010 - 20" LCD Monitor
Страница 1: ...Service Manual 0 Service Manual LCD Monitor ST2010 ...
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Страница 21: ...Service Manual 20 8 Key Parts Pin Assignments 8 1 U105 TSUMU58EDJ LF ...
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Страница 27: ...Service Manual 26 Chapter 4 Disassembly Assembly 1 Exploded Diagram ...
Страница 30: ...Service Manual 29 3 ST2010 Assembly Block ...
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Страница 60: ...Service Manual 59 Attachment 2 Schematic 1 Interface board schematic ...
Страница 68: ...Service Manual 67 power board schematic 1 ...
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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 ...
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