Lenovo LXM-L19BH
Page 31 of 44
8.2.3 POWER/INVERTER BOARD
1.) No power
Check to CN102 pin12 = 12V
Check Interface board
OK
Check AC line volt 120V or 220V
NG
Change F901; check BD901, Q903, and IC901
Check start voltage for the pin3 of IC901
Check the auxiliary voltage is smaller than 20V
2) Check Q901, Q902…OVP circuit
Check D910, D912, IC902, IC903
NG
Содержание LXM-L19BH
Страница 12: ...Lenovo LXM L19BH Page 12 of 44 5 BLOCK DIAGRAM 5 1 SOFTWARE FLOW CHART h t t p w w w w j e l n e t ...
Страница 13: ...Lenovo LXM L19BH Page 13 of 44 h t t p w w w w j e l n e t ...
Страница 16: ...Lenovo LXM L19BH Page 16 of 44 Power Block Diagram h t t p w w w w j e l n e t ...
Страница 25: ...Lenovo LXM L19BH Page 25 of 44 7 PCB LAYOUT 7 1 MAIN BOARD h t t p w w w w j e l n e t ...
Страница 26: ...Lenovo LXM L19BH Page 26 of 44 7 2 Power Inverter Board h t t p w w w w j e l n e t ...