Hitachi C20 Lc880snt Service Manual
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Page 11
- 11 -TROUBLESHOOTING YesNo No Check LED Replace LED with a new one Is the power cord and DC adapter plugged in? LED lights up Press Power button Yes LED light is green LED light is red Check inverter PWB unit Check MCU(U4) 1.Check MCU (U4) 2.Check CN3 (or CN7) is connected 3.Check U8 has VCC voltage 1.Connect the line of J9and inverter 2.Replace inverter with a newone Replace MCU with a new one Replace DRIVE PWB unit with a new one 1.Replace MCU with a newone. 2.Replace U8 with a newone. Defective...
Page 12
- 12 -SCHEMATIC DIAGRAMS Main Diagram-1
Page 13
- 13 -SCHEMATIC DIAGRAMS Main Diagram-2
Page 14
- 14 -SCHEMATIC DIAGRAMS Control Keys Diagram
Page 15
- 15 -SCHEMATIC DIAGRAMS Power Diagram
Page 16
- 16 -SCHEMATIC DIAGRAMS Tuner Diagram
Page 17
- 17 -SCHEMATIC DIAGRAMS Teletext Diagram
Page 18
- 18 -SCHEMATIC DIAGRAMS Video Decoder Diagram
Page 19
- 19 -SCHEMATIC DIAGRAMS Audio And CONN Diagram
Page 20
- 20 -SCHEMATIC DIAGRAMS Lvds_ttl-out Diagram