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RCA PTK169 chassis repair help

Discussion in 'Electronic Repair' started by [email protected], Nov 9, 2013.

  1. Guest

    I have a CTC169PGA chassis that died suddenly. I replaced the chopper transistor (Q4101) and regulator IC (U4101). When in standby, I am getting 14-15 volts on CR4118 but nothing on CR4116 (B+). Does this mean the supply isworking and there is a short on this line (HV splitter maybe or CR4116 bad)? Or could this still be a power supply issue?

    Jack
     
  2. Guest

    Sounds like 4116 is open. The old 243646. I use the same diode for 4118 actually.

    That power supply operates in like a "burst" mode when turned off. It will not go into "run" mode without horizontal drive.

    The rectifiers can check good on an ohmmeter and be bad.
     
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