1. Forum
  2. Usenet
  3. SCI.ELECTRONICS.REPAIR

  • UPDATE: Panasonic VCR, Timer Record Issue

    From jaugustine@verizon.net@21:1/5 to All on Sun Aug 8 18:54:15 2021
    Hi,

    In early June, I posted about Panasonic PV-4800 VCR, Timer record issue (in part below). Note: I do NOT have a SM or schematic..

    I can set a time to make a recording, turn off the VCR and the Timer indicator is lit.
    However, when the time to record arrives, the VCR does NOT record.
    The Timer indicator is still lit.

    I decided to use this old 1988 VCR without the Timer, since I have other VCRs,

    Recently, when I tried to Record directly, the VCR turned off. The
    same thing happened when I tried to Play a tape.

    Based on my experience servicing VCRs, this symptom usually indicates
    a faulty electroylitic(s) in the Power Supply. Note: I never encountered a Timer record issue, until this past June.

    I serviced the power supply and found four faulty electrolytic capacitors (all caps are 105 deg.): C5 4.7/200 ESR about 7 ohms.
    C12 330/18 electrolyte leakage. C13 330/18 electrolyte leakage. C14 4.7/50 electrolyte leakage. Note: UF/Voltage. BTW: I had replaced
    C16 330/6.3 in 2005 with a 25V version. LV (6.3V) caps often became defective before higher voltage types.

    Now I can use this VCR again and the Timer record works!

    I have to assume, Timer record (standby) adds an additional
    load to the power supply when the VCR tries to Record?

    John

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Chuck@21:1/5 to jaugustine@verizon.net on Mon Aug 9 10:45:32 2021
    On Sun, 08 Aug 2021 18:54:15 -0400, jaugustine@verizon.net wrote:

    Hi,

    In early June, I posted about Panasonic PV-4800 VCR, Timer record issue
    (in part below). Note: I do NOT have a SM or schematic..

    I can set a time to make a recording, turn off the VCR and the Timer indicator is lit.
    However, when the time to record arrives, the VCR does NOT record.
    The Timer indicator is still lit.

    I decided to use this old 1988 VCR without the Timer, since I have other
    VCRs,

    Recently, when I tried to Record directly, the VCR turned off. The
    same thing happened when I tried to Play a tape.

    Based on my experience servicing VCRs, this symptom usually indicates
    a faulty electroylitic(s) in the Power Supply. Note: I never encountered a >Timer record issue, until this past June.

    I serviced the power supply and found four faulty electrolytic
    capacitors (all caps are 105 deg.): C5 4.7/200 ESR about 7 ohms.
    C12 330/18 electrolyte leakage. C13 330/18 electrolyte leakage. C14 >4.7/50 electrolyte leakage. Note: UF/Voltage. BTW: I had replaced
    C16 330/6.3 in 2005 with a 25V version. LV (6.3V) caps often became >defective before higher voltage types.

    Now I can use this VCR again and the Timer record works!

    I have to assume, Timer record (standby) adds an additional
    load to the power supply when the VCR tries to Record?

    John

    I was going to suggest the caps except there are usually squiggles in
    the video before there are worse symptoms.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)