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HP L1902 Service Manual
Page 34 of 69
2.) W / LED , No Backlight
Check CON1 Pin1 =12V
Check ON/OFF signal
Check IC201 pin5&Pin3=5V
Check the pin7 of IC201=2.5V
Check OVP LOOP (Pin2 of IC201)
Check FB LOOP(Pin9 of IC201)
Check connecter or lamp
Check Pin17 or Pin18 RC OSC LOOP
Check adapter or MB
Check Interface board
Change Q205,Q207,Q206,ZD203
Check IC201
CheckD201,D203,D206,D209,R223,C240
Check R202,D204,D207,D110,R210,R215,
R227 R234,R222,R221
Change R217/C220
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
Check Q204/Q208/Q209/Q210
Change
OK
NG
Summary of Contents for L1902
Page 14: ...HP L1902 Service Manual Page 14 of 69 6 Block Diagram 6 1 Monitor Exploded View ...
Page 18: ...HP L1902 Service Manual Page 18 of 69 Power Block Diagram ...
Page 24: ...HP L1902 Service Manual Page 24 of 69 ...
Page 28: ...HP L1902 Service Manual Page 28 of 69 8 1 2 715L1253 1 2 For AU Panel MST9111B Project ...
Page 29: ...HP L1902 Service Manual Page 29 of 69 8 2 Power Board 715L1142 C LGH ...
Page 32: ...HP L1902 Service Manual Page 32 of 69 B For AU Panel MST9111B Project ...