Lenovo Service Manual L2021W
16
5.3 Power/ Inverter Board Block Diagram
Fuse
EMI
Rectifier
Smoothing
Capacitor
C907
Transformer
T901
MOS
Q901
IC-PWM
IC901
12V
Rectifier
5V
Rectifier
12V
5V
Sense
resistor
Vcc
Rectifier
regulating
Sampling
PhotoCoupler
Vcc
Open Lamp Protection
12V DC
IC Power Supply
Converter
DC-AC
Transformer
T801
High Voltage
Output
Resonance NET
Switching MOS
Q802-AM9945
AC input
100-240V
2- CCFL
PWM Control IC
IC801-TL494
Current Sampling
Power part
Inverter part
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 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 ...
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Страница 29: ...Lenovo Service Manual L2021W 29 8 2 PowerBoard 715G4174 ...
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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 ...
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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 ...