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HP L1902 Service Manual
Page 33 of 69
9.2.2 Inverter / Power Board
1.) No power
Check to CN902 Pin1
And Pin3=5V
Check Interface board
NG
Check AC line volt 120V
or 220V
NG
OK
Check F901, Check BD901,Q901,IC901
Check the voltage of C905(+)
Check bridge rectified circuit
NG
Check start voltage for the pin3 & pin7 of IC901
Check IC901
NG
Check the auxiliary voltage Is smaller than20V
1) Check IC902,IC903
2) Check Q902,Q903…OVP circuit
NG
OK
Check D910,D911, ZD902,R925,R926,R927
OK
OK
OK
NG
Содержание L1902
Страница 14: ...HP L1902 Service Manual Page 14 of 69 6 Block Diagram 6 1 Monitor Exploded View ...
Страница 16: ...HP L1902 Service Manual Page 16 of 69 6 3 Electrical Block Diagram 6 3 1 Scalar Board Block Diagram ...
Страница 17: ...HP L1902 Service Manual Page 17 of 69 6 3 2 Inverter Power Board Block Diagram Inverter Block Diagram ...
Страница 18: ...HP L1902 Service Manual Page 18 of 69 Power Block Diagram ...
Страница 24: ...HP L1902 Service Manual Page 24 of 69 ...
Страница 28: ...HP L1902 Service Manual Page 28 of 69 8 1 2 715L1253 1 2 For AU Panel MST9111B Project ...
Страница 29: ...HP L1902 Service Manual Page 29 of 69 8 2 Power Board 715L1142 C LGH ...
Страница 32: ...HP L1902 Service Manual Page 32 of 69 B For AU Panel MST9111B Project ...