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Hitachi C15 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 
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