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Good picture- no -color -- b/w only

Discussion in 'Electronic Repair' started by Scott, Mar 17, 2005.

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  1. Scott

    Scott Guest

    A friend gave me his Mitsubishi 35 inch color TV CS3504R.

    I get great picture on all channels, all inputs- cable, antenna, VCR but
    only black and white.

    I get no color.

    I have changed the tint and color controls from the menu- no change.

    Also, the menu IS in COLOR!?!! so I know the color part works just great.

    I am scratching my head. I don't know enough about TVs to figure out why
    I cannot get over the air color but can get internal color.

    ?
     
  2. b

    b Guest

    loose connections on the xtal in the chroma decoder
    -Ben
     
  3. Barry Hobbs

    Barry Hobbs Guest

    may sound obvious, but if youre using a scart lead, make sure that is in
    properly at noth ends.
     
  4. Barry Hobbs

    Barry Hobbs Guest

    sory ignore me, should have read the question properly ('all inputs')
     
  5. Do you have good color on the monitor output?

    Check these tips also :

    ---------------------------------------------------------------
    Text pasted from WinSTIPS 2.0
    http://www.ServiceSoftware.com
    ---------------------------------------------------------------

    MITSUBISHI CS3504R

    Color No Chroma

    From Mitsubishi

    Check The Value Of C7224(.047uf 50v Np).Located On The Digital-Pcb At Pin 4
    Of Ic7104.

    ---------------------------------------------------------------

    MITSUBISHI CS3504R

    Color No Chroma

    From Mitsubishi

    May Be Intermittent. Suspect Vr7100 (50k). Located On Pcb-Digital At Ic7104
    Pin 4.

    ---------------------------------------------------------------

    MITSUBISHI CS3504R

    Color No Chroma Main Or Pip

    From Mitsubishi

    Color And Luminance Ok From Monitor Output. Confirm Chroma Into Ic7104 Pin5.
    If Ok Confirm Chroma Out Of Ic7104 Pin 3. If Missing Check C7198 ( Pin 6
    Ic7104) For Leaky/Shorted. Located On Pcb-

    ---------------------------------------------------------------

    MITSUBISHI CS3504R

    Color No Chroma Main Or Pip

    From Mitsubishi

    Suspect Following Components On Pcb-Digital: C7103 1000uf 16v At
    Ic7100 Pin 19

    ---------------------------------------------------------------

    MITSUBISHI CS3504R

    Color No Chroma Main Or Pip

    From Mitsubishi

    Suspect Defective C7119 (0.1uf/ 25v). Located On Pcb-Digital At Ic7101 Pin
    9. * Note - Voltage At Pin 9 May Check Correctly, But Capacitor Is
    Defective. Replace.

    ---------------------------------------------------------------

    MITSUBISHI CS3504R

    Color No Chroma Main Or Pip

    From Mitsubishi

    Suspect Defective 3.58mhz Crystal X601. Not Free Running Osc. If Chroma
    Signal Low, X601 Will Drift Off Freq. Replace. Located On Pcb-Main At
    Ic201 Pin 25. Pt# 285p015010

    ---------------------------------------------------------------

    MITSUBISHI CS3504R

    Digital No Color On Pip

    From Mitsubishi

    Color And Luminance Ok From Monitor Output. Confirm Chroma Into Ic7104 Pin
    5. If Ok Confirm Chroma Out Of Ic7104 Pin 3. If Missing Check C7198 ( Pin
    6 Ic7104) For Leaky/Shorted. Located On Pcb-

    ---------------------------------------------------------------



    --
    ==========================
    Jeff Stielau
    Shoreline Electronics Repair
    344 East Main Street
    Clinton,CT 06413
    860-399-1861
    860-664-3535 (fax)

    ========================
     
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