Lenovo Service Manual L2021W
40
Check flow chart
For the no power
Check CN901
100-240V
?
Check rectified voltage-C907
Check AC supply
Check FuseF901/ BD901
L902/BD901/C901/C902
Check voltage of IC901-3pin
check component R904/R932
Check T901(1-3)out-Vcc
Check D901/R909/C908
Check IC901-drive out
Check MOS-Q901pin(G/D)
Check/replace IC901
Check R910/R938/Q901/T901pri
Around component
Check T901sub rectified out
5V/12V,
Check rectified diode
D906/D908
&fiter capacitor
Check-- open load
Chech opto-couple
IC902&IC903
OK
NG
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
Power Board---
No Power 5V/12V
Содержание L2021 WA
Страница 1: ...Lenovo Service Manual L2021W 1 联想显示器维修手册 Brand Lenovo Model L2021 Wide L2021WA ...
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Страница 10: ...Lenovo Service Manual L2021W 10 ...
Страница 13: ...Lenovo Service Manual L2021W 13 4 3 Electrical Characteristics a TFT LCD module b Backlight unit ...
Страница 14: ...Lenovo Service Manual L2021W 14 4 4 Panel Block Diagroam 4 5 LVDS Connector pin Assignment ...
Страница 26: ...Lenovo Service Manual L2021W 26 7 Explore Views ...
Страница 27: ...Lenovo Service Manual L2021W 27 8 PCB Layout 8 1 MainBoard 715G3327 1 ...
Страница 28: ...Lenovo Service Manual L2021W 28 ...
Страница 29: ...Lenovo Service Manual L2021W 29 8 2 PowerBoard 715G4174 ...
Страница 30: ...Lenovo Service Manual L2021W 30 ...
Страница 31: ...Lenovo Service Manual L2021W 31 8 3 KeyBoard 715G4138 K01 715G4139 K01 ...
Страница 35: ...Lenovo Service Manual L2021W 35 Remove the Lamp connector Remove screws 4 3 Remove the boards ...
Страница 36: ...Lenovo Service Manual L2021W 36 ...
Страница 44: ...Lenovo Service Manual L2021W 44 1 selected ISP RTD2122 as shown in Press the icon to select Note save HDCP key ...
Страница 47: ...Lenovo Service Manual L2021W 47 4 Click Programming started After Programming Appear PASS ...
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Страница 52: ...Lenovo Service Manual L2021W 52 In normal user mode open the menu to restore factory default values ...