DMR-ES30VEB when copying VHS onto DVD, works for about 20 minutes, then whole unit suddenly shuts down, plus display goes off. Functions gradually return after about 20/30 mins. Thought it was bad discs,...
Shutdown? sounds like a power supply problem to me, and one of the likely causes would be the IC regulator (IC1) within it. The IC would have 3 to 5 pins on it, is probably marked as STRxxxxx (the x represents its type number), and probably has intermittent partial internal failure, causing the symptoms you describe. With the whole combo unplugged from the wall, remove the top cover, locate this little device, note its type/part number, find out cost of the part, replace it, observing its pin orientation on the PCB.
You might also like to check all of the electrolytic capacitors on this board too to be sure - and replace every one of them. Capacitors are one of the biggest troublemakers in any power circuit, especially electrolytic types located near components which emit heat (such as ICs and transformers). You may need to (carefully) remove the DVD drive to gain access to the power sub-board underneath. Once the sub-board is out, you can examine it more closely, and do as above. The IC regulators in this series were usually rated around 12V or so, and for the most part, were reliable. Caps are cheap enough - just note the values of the originals before buying new ones, perhaps uprate the working voltages of some to be safe. Electrolytics have a negative stripe on one side of the 'cylinder' or 'can' - so observe their polarity when replacing - the positive (+) of the cap must match the (+) point on the board.
The good news is that this may not be a really expensive repair for an otherwise functioning DVD recorder, and at this stage, is confined to one circuit. However, this is just advice from my experience. Your best option is to order the correct part number for the IC due to its voltage rating and the internal components in it. The part cost will depend on who you deal with. Don't forget to check the power sub-board for dry soldering, cracks, burn marks around components, etc. Worth saving.
Feb 18, 2011 |
Panasonic DMRES30V DVD Recorder/VCR Combo