15" LCD Color Monitor
Dell E157FPc
43
Panel Power Circuit
Inverter Control Relative Circuit
Measured the inverter connector CN402
Pin2 on/off control=3.3V (on)
Pin4 PWM signal control dim 0V-5V
Replace Inverter board to new-one
And check the screen is normal?
OK
Check the BKlt-On relative circuit, R705; in
normal operation, when LED=green, R705
BKlt-On should=3.3V, If BKlt-On no-response
when the power switch turn on-off, Replace
U401
Check NO SCREEN APPEAR block
NG
NG
NG, still no screen
Check C101 should have response from
0V to 5V when we switch the power
switch from on to off
Check the PPWR panel power relative circuit,
Q704, Q706; in normal operation,
When LED =green, V-R725 should =5V
If PPWR no-response when the power switch
Turn on and turn off, replace the U401
OK
NG
Check CN101, if it is not soldered well
Change CN101
Change panel
NG
OK
Содержание E157FPc
Страница 19: ...15 LCD Color Monitor Dell E157FPc 19 5 Block Diagram 5 1 Monitor Exploded View ...
Страница 23: ...15 LCD Color Monitor Dell E157FPc 23 5 3 2 Inverter Power Board ...
Страница 36: ...15 LCD Color Monitor Dell E157FPc 36 8 PCB Layout 8 1 Main Board ...
Страница 37: ...15 LCD Color Monitor Dell E157FPc 37 ...
Страница 38: ...15 LCD Color Monitor Dell E157FPc 38 8 2 Power Board ...
Страница 39: ...15 LCD Color Monitor Dell E157FPc 39 ...
Страница 40: ...15 LCD Color Monitor Dell E157FPc 40 8 3 Key Board ...
Страница 52: ...15 LCD Color Monitor Dell E157FPc 52 Completing the update 1 for Genesis Gprobe 5 0 setup wizard ...
Страница 54: ...15 LCD Color Monitor Dell E157FPc 54 2 Select Commands Batch ...