27" LCD Color Monitor
Dell 2707WFP
67
9.2.2 Power Board
Advert: repair ADPC board, Because PCB is double-face board, it is recommended that dispart the board
from the monitor for repair.
NO POWER
Measure CN903 PIN 7/8/9 = 12V
PIN 14 = 5V
OK
Check the main board. (Refer to the
Main board trouble shooting)
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 C909 (+) = 300V
NG
CheckF901, NR901, DB901,
DB902, Q901
Check the voltage for the PIN 5 of
IC901 is between 16V
NG
Check R904, D902, IC901
OK
Check the voltage for the PIN 12
of IC907 is between 16V
NG
OK
Check the voltage for the PIN 5 of
IC901 is between 16V
Check the wave for the PIN
16/11 of IC907
OK
NG
Check Q902,
IC906, ZD901
Check IC901 Circuit
R904, D902, T901,
ZD905, IC902
OK NG
Check B+ voltage
Replace IC907
OK NG
Check IC905 Circuit,
Q901, D907
Check Q905,
Q906, T902,
D910, D911,
D912, D913
Содержание 2707WFP - UltraSharp - 27" LCD Monitor
Страница 24: ...27 LCD Color Monitor Dell 2707WFP 24 ...
Страница 33: ...27 LCD Color Monitor Dell 2707WFP 33 5 2 Electrical Block Diagram 5 2 1 Main Board ...
Страница 40: ...27 LCD Color Monitor Dell 2707WFP 40 Remove the bezel Remove the Bezel Panel ...
Страница 55: ...27 LCD Color Monitor Dell 2707WFP 55 8 PCB Layout 8 1 Main Board ...
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Страница 57: ...27 LCD Color Monitor Dell 2707WFP 57 8 2 Power Board ...
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Страница 59: ...27 LCD Color Monitor Dell 2707WFP 59 8 3 Key Board 8 4 USB Board ...
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Страница 79: ...27 LCD Color Monitor Dell 2707WFP 79 12 Exploded View ...