Lenovo LXM-L19BH
Page 32 of 44
2.) W / LED, No Backlight
Check CN102 pin12 =12V
NG
OK
Check adapter or MB
Check ON/OFF signal
Check Interface board
NG
OK
Check the pin1 of U201 have saw tooth wave
Check D201(-) have the output of square wave at short time.
Check the resonant wave of pin2 & pin5 for PT201
Check the output of PT201
Check connecter & lamp
OK
NG
Change PT201
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 ...