24" LCD Color Monitor HP LP2475w
42
9.2.2 Power/Inverter Board
1. No Power
Measure CN904 PIN 2/3/4 = 5V
PIN 11/12 = 12V
OK
NG
Disconnect the cable connecting
main board and PWPC board,
check if the 12V and 5V voltage in
PWPC board is normal?
Attention:
1. Be sure the grounding is OK.
2. Cut off the power when soldering.
Check C914 (+) = 300V
NG
CheckF901, NR901, DB901,
D901, Q901
Check the voltage for the PIN 7 of
IC902 is between 16V
NG
Check Q902, IC902
OK
Check the OUTPUT of IC902
OK
NG
Check B+ voltage
Check Q902,
Q906, T902,
D906, D905,
D907,
Replace IC902
OK
Check the main board. (Refer to the
Main board trouble shooting)
Содержание LP2475w - 24" LCD Monitor
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Страница 14: ...24 LCD Color Monitor HP LP2475w 14 4 2 Factory Preset Display Modes ...
Страница 17: ...24 LCD Color Monitor HP LP2475w 17 5 2 Optical Characteristics Ta 25 C VLCD 12 0V fV 60Hz Dclk 154MHz VBR 3 3V ...
Страница 34: ...24 LCD Color Monitor HP LP2475w 34 8 PCB Layout 8 1 Main Board ...
Страница 35: ...24 LCD Color Monitor HP LP2475w 35 8 2 Power Board 8 3Key Board ...
Страница 36: ...24 LCD Color Monitor HP LP2475w 36 8 4 USB Board ...
Страница 50: ...24 LCD Color Monitor HP LP2475w 50 The panel The end ...