Question about Panasonic DMR-E85H DVD Recorder

1 Answer

Frozen up with please wait read out on unit

I was watching a recording on the HDD when suddenly screen went dark , with a flashing white screen about once a second - read out on unit reads PLEASE WAIT - which I did , but nothing happened - The unit does not obey any commands - from remote or directly on unit - When I hit power button 2 small lines light up shortly on both sides of the PLEASE WAIT - but nothing happens - unit remains frozen ----- I have unplugged unit and waited, but no reset - I also disconnected cable line in, but nothing has helped - The day before this problem , I had recieved a signal from my cable company to activate a digital cable box I had just rented from cable company - I wonder if this signal sent damaged my dvd recorder, which was connected to cable TV at the time ?

Posted by Paul Sandella on

  • 1 more comment 
  • Paul Sandella
    Paul Sandella Oct 09, 2007

    My fuse on power supply board checked out good, and there are no visible signs on any capaciter shorts on power board----------- - an earlier solution on this site for a similar problem pointed to the faliure of 2 caps on power supply board - according to solution, these failures were visible to the servive person - does anyone know what caps these were ? c1126 + c1127 perhaps ? although mine look good - also, is there anywhere a power supply circuit board can be purchased ? I'll just shotgun the problem with board replacement if financially wise - Thanks all !!

  • Paul Sandella
    Paul Sandella Oct 09, 2007

    can you tell me what caps are the filtering caps ? are they c1126 and c1127, and do thay have to be removed from circuit to be tested ?

  • Paul Sandella
    Paul Sandella Oct 09, 2007

    I can't work on it today, I will contact you regarding this as soon as I can - thanks - Paul

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Hello MrBrokeit, Shotgunning works sometimes, but the effort spent is often not worth the time spent. Let me explain if your power supply is defective then shotgunning will produce results, however if the problem is elsewhere you will never know it. I would suggest troubleshooting the unit, to determine where the problem really is. For this task I would suggest that you get a schematic diagram of the unit, a multimeter, and an oscilloscope. use the schematic to find the various test points, use the multimeter to measure the voltages at the test points, and then use the oscilloscope to measure the signals at the test points. Troubleshooting in this fashion will produce better results than as with the shotgun method. I would suggest checking for ripple voltage in the DC path. This voltage is due to AC bleed over from poor regulation by malfunctioning filter capacitors. you will not see physical signs of the problem but a quick check of the capacitors will let you know if the is the problem. Also check to see if the DC voltage across the positive terminal of the capacitor is held at the level it should be at. Then check all points on the power supply and compare them to the schmatic. Thank you, Shuttle83

Posted on Oct 09, 2007

  • Anonymous Oct 09, 2007

    in fact you can measure them in circuit since you are actually measuring the voltage across them to determine if there is too much ripple riding on the DC level (use an oscilloscope for this). The filter caps will be the largest ones i the unit. if C1126 and C1127 are the largest then measuer across those.

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