17" LCD Color Monitor
Dell SE178WFPC
47
No Backlight
Check F801=12V
NG
OK
Check adapter and F801
Check ON/OFF signal
Check Interface board or main board
NG
OK
Check IC801 PIN12=5V
NG
OK
Change on/off circuit
Check IC801 PIN5 have triangle wave
NG
OK
Change IC801
Check Q802 Pin2/4 has the output of square wave at short time.
NG
OK
Check IC801, Q804, Q801, Q812, Q811
Check T801 and Q802
OK
NG
Change T801 and Q802
Check connecter & lamp and feedback circuit
Summary of Contents for SE178WFPC
Page 35: ...17 LCD Color Monitor Dell SE178WFPC 35 8 PCB Layout 8 1 Main Board ...
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Page 38: ...17 LCD Color Monitor Dell SE178WFPC 38 8 2 Power Board ...
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Page 41: ...17 LCD Color Monitor Dell SE178WFPC 41 8 3 Key Board ...
Page 54: ...17 LCD Color Monitor Dell SE178WFPC 54 12 Exploded View ...