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Hitachi C15 Lc880snt Service Manual

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    							- 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
    Normal
    Defective
    Defective Normal Check power input system
    1.AC adapter
    *Normal?
    *Connected properly?
    2.U9 has +5V?
    3.U10 has 3.3V?
    4.LED controls electrocircuit?
    5.JD3 and JD2 are connected? Normal
    TV DOES NOT TURN ON Plug in
    Defective 
    						
    							- 12 -SCHEMATIC DIAGRAMS
    Main Diagram-1 
    						
    							- 13 -SCHEMATIC DIAGRAMS
    Main Diagram-2 
    						
    							- 14 -SCHEMATIC DIAGRAMS
    Control Keys Diagram 
    						
    							- 15 -SCHEMATIC DIAGRAMS
    Power Diagram 
    						
    							- 16 -SCHEMATIC DIAGRAMS
    Tuner Diagram 
    						
    							- 17 -SCHEMATIC DIAGRAMS
    Teletext Diagram 
    						
    							- 18 -SCHEMATIC DIAGRAMS
    Video Decoder Diagram 
    						
    							- 19 -SCHEMATIC DIAGRAMS
    Audio And CONN Diagram 
    						
    							- 20 -SCHEMATIC DIAGRAMS
    Lvds_ttl-out Diagram 
    						
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