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Daewoo Hc 4230 Service Manual

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    							6. Trouble Shooting Guide
    4. AUDIO LINE OUTPUT Abno rmal
    Check if the 
    output of IC501 
    pin121 is ok?
    Replace IC501.
    No
    Ye s
    Check if the 
    output of IC408 
    is ok?No
    Check if the Signal waveform of IC401  is ok?
    Ye s
    Ye s
    Check if
     REC 
    Output of Jack 
    is ok?
    Ye s
    OK
    Audio Abnormal  of 
    Rec Output
    Check if I2S 
    between IC501 
    is ok?
    Check I2S Line.Ye s
    Check if VQ & 
    FILT+ is ok ?
    No
    No
    Check PLL 
    Circuit of IC408.
    Replace DAC, IC408
    Ye s
    No
    Check IC409 Buffer.
    No
    Check Function IC, IC401
    19
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    4. AUDIO LINE OUTPUT Abno rmal
    Check if the 
    output of IC501 
    pin120 is ok?
    Replace IC501.
    No
    Ye s
    Check if the 
    output of IC408 
    is ok?No
    Ye s
    Ye s
    Check i
    f SW 
    Output of Jack 
    is ok?
    Ye s
    OK
    Audio Abnormal  of 
    Subwoofer Output
    Check if I2S 
    between IC501 
    is ok?
    Check I2S Line.Ye s
    Check if VQ & 
    FILT+ is ok ?
    No
    No
    Check PLL 
    Circuit of IC408.
    Replace DAC, IC408
    Ye s
    No
    Check IC411 Pre Amp Circuit.
    20
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    4. AUDIO LINE OUTPUT Abno rmal
    Check if the 
    output of IC501 
    pin124 is ok?
    Replace IC501.
    No
    Ye s
    Check if the 
    output of IC404 
    is ok?No
    Ye s
    OK
    Audio Abnormal  of 
    Optical Output
    Check if Setup 
    is ok?
    Setting for Digital Output onYe s
    Check if IC303 
    is ok?
    No
    No
    Replace Buffer, IC303
    Ye s
    21
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    5. AUDIO  CONTROL  Abnormal
    Check if the 
    I2C waveform 
    of IC201 is ok?
    Check between IC501 to IC201.
    Replace IC201.
    No Ye sCheck if the 
    data of IC501 is 
    ok?No
    Ye s
    OK
    Audio Abnormal  of 
    Volume Control
    Check Input 
    data of volume 
    is ok?
    Check Connection CN701.
    Check Encoder SW. VR701.Ye s
    No
    Replace IC501
    22
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    5. AUDIO  CONTROL  Abnormal
    Ye sCheck if the 
    data of IC501 is 
    ok?No
    OK
    Audio Abnormal  of 
    Remote Control
    Check Input 
    data of RMC is 
    ok?
    Check Connection CN701.
    Check Remote Receiver, RM701.Ye s
    No
    Replace IC501
    23
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    6. VIDEO OUTPUT Abno rmal
    Ye sCheck if the 
    Output of IC501 
    is ok?
    OK
    VIDEO Abnormal  of 
    Component
    Check Setup is 
    ok?
    Setting for RGB Mode.
    Ye s
    No
    Replace IC501
    Check the 
    output of IC601 
    is ok?NoNo
    Check Filter Circuit.
    Check Drive IC, IC601.
    Check the
     
    output of Jack 
    is ok?
    Ye s
    Ye sNo
    Check Filte
    r Circuit. Check Crystal 
    is ok?
    Ye sReplace Cystal, XC501.
    No
    24
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    6. VIDEO OUTPUT Abno rmal
    Ye sCheck if the 
    Output of IC501 
    is ok?
    OK
    VIDEO Abnormal
     of S-VIDEO
    Check Setup is 
    ok?
    Setting for S-VIDEO Mode.
    Ye s
    No
    Replace IC501
    Check the 
    output of IC601 
    is ok?NoNo
    Check Filter Circuit.
    Check Drive IC, IC601.
    Check the
     
    output of Jack 
    is ok?
    Ye s
    Ye sNo
    Check Filte
    r Circuit. Check Crystal 
    is ok?
    Replace Crystal, XC501.
    No
    25
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    6. VIDEO OUTPUT Abno rmal
    Ye sCheck if the 
    Output of IC501 
    is ok?
    OK
    VIDEO Abnormal  of 
    Composite
    Ye s
    Replace IC501
    Check the 
    output of IC602 
    is ok?NoNo
    Check the 
    output of Jack 
    is ok?
    Ye s
    Ye sNo
    Check Filter Circuit.Check Crystal 
    is ok?
    Replace Crystal, XC501.
    No
    Check the 
    control of 
    Select is ok?
    Check Power Supply Circuit.
    Check Control Line between 
    IC208 : Sel1, Sel
    2
    No
    Replace IC602 Ye s
    26
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    7. MECHA CONTROL Ab normal
    Ye sCheck if the 
    data input of 
    IC501 is ok?
    OK
    Control Abnormal  of 
    Open/Close
    Ye s
    Replace IC501
    Check the
     
    output of IC303 
    pin 1,7 is ok?NoNo
    Ye sCheck VFD 
    data is ok?
    Replace Front PCB Ass’y.
    Check Connection CN701.
    Check data waveforn of 
    VFD_DATA, CLK, CS
    No
    Check the 
    Supplied power 
    is ok?
    Check Powe
    r Supply Circuit.
    No
    Replace IC303 Ye s
    27
    Audio Part
     
    						
    							6. Trouble Shooting Guide
    7. MECHA CONTROL Ab normal
    Ye sCheck if the 
    data input of 
    IC501 is ok?
    OK
    Control Abnormal  of 
    Disc Loading
    Ye s
    Replace IC501
    Check the 
    output of IC302 
    is ok?NoNo
    Ye sCheck VFD 
    data is ok?
    Replace Front PCB Ass’y.
    Check Connection CN701.
    Check data waveforn of 
    VFD_DATA, CLK, CS
    No
    Check the 
    Supplied power 
    is ok?
    Check Powe
    r Supply Circuit.
    No
    Replace IC302 Ye s
    Check the 
    interface da
    ta is 
    ok?
    Check data between IC501.
    No
    Ye s
    28
    Audio Part
     
    						
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