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