Hi all...I hope all are healthy and well. I have this dual vcr/dvd recorder and player. I have had it for many years of good use. I found it dead today with no clock display. While I was testing voltage on one of the caps in power supply, power to unit came back. Can I assume that particular cap is bad...or does this clue us in on other problems? Thanks Al
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Re: Panasonic DMR ES30V Power supply problem
or dry cracked solder joints, or leaking cap juice into through holes. Hard to say without pics. If caps go bad, they are high in ESR when cold. Next time when it does this, plug the VCR in and heat up the caps with a hair dryer to 50C. If it turns itself on, cap problem. -
Re: Panasonic DMR ES30V Power supply problem
I would replace C1108 (33ยตf/35v) That's the vcc cap. in the primary. Now if we knew which cap you were talking about, that might help.Last edited by R_J; 04-16-2020, 05:24 PM.Comment
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Re: Panasonic DMR ES30V Power supply problem
So..lost power again on vcr. I used the hair dryer heat to bring it back, to no avail. Now, my voltage testing does not bring power. C1108 is marked on board, but there is not a cap there.I am getting voltages on one side of board..but not the other. Attached pics of power supply board. thanks AlComment
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Re: Panasonic DMR ES30V Power supply problem
The half of board with ac cord ...gets power the other side does notAttached FilesComment
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Re: Panasonic DMR ES30V Power supply problem
.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Panasonic DMR ES30V Power supply problem
I would do a blanket cap replacement on the power supply board for a start.
I had a friend that was in the trade when these and similar Panasonic's of this era were current and he always stated that they used cheap caps so they wouldn't last ๏ฟฝ๏ฟฝ and from what I've experienced he was right , ironically Panasonic make some of the best caps!! But didn't use them in their own stuff.Comment
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Re: Panasonic DMR ES30V Power supply problem
It might help to upload a larger picture than the thumbnail. Try replacing the cap beside the heatsink in the primary sideAttached FilesLast edited by R_J; 04-18-2020, 02:45 PM.Comment
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Re: Panasonic DMR ES30V Power supply problem
also check the back of the power supply for bad solder joints, specifically on heavy or heat sink mounted parts. And as RJ already said, change that little cap next to the heat sink.Last edited by CapLeaker; 04-19-2020, 05:35 AM.Comment
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Re: Panasonic DMR ES30V Power supply problem
I would also check the solder joints in the area where it has been getting quite hot, by the two large caps and transformer.Willing to help but I'm no expert.Comment
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Re: Panasonic DMR ES30V Power supply problem
I checked all solder joints, and they are OK. I have decided to change all caps (8) of them. Where would you recommend I purchase them? It would be convenient to get them all in one shop. Thanks AlComment
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Re: Panasonic DMR ES30V Power supply problem
DigiKey or a trusted ebay seller, I suppose.Last edited by nomoresonys; 04-20-2020, 02:47 PM.Comment
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Re: Panasonic DMR ES30V Power supply problem
OK...I received all the caps, and first replaced 68uf 35 v next to heat sink. She powered up. I left it on for a few hours then unplugged. When I plugged it back in no power. The heat sink was very hot. My question is...should I replace all the caps, or should I suspect the IC mounted on heat sink? Thanks AlComment
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Re: Panasonic DMR ES30V Power supply problem
since you have them, you might as well...Comment
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Re: Panasonic DMR ES30V Power supply problem
Hi all....I am happy to report that after replacing all caps ( except the 2 250v 100uf) which are on order.....she is working well. I transferred 3 vhs-dvd with out problem. That heat sink still gets very hot, so I hope I'm not looking at future failure. I will keep all posted...Stay safe....thanks AlComment
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Re: Panasonic DMR ES30V Power supply problem
this has been a real help for me too i have a similar issues i have replaced all the electrolytic caps as i had DIM DISPLAY, AND THE UNIT TURNED OF WHEN TRYING TO DUB A VHS TO DVD.
i was told it was the psu and the caps needed doing so all that is done and yes they are all the right way around, and now it wont even power up? there is all the voltages on the 16 pin outs and match up with the service schmatics . so now i am at a loss. any help would be greatfulComment
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Re: Panasonic DMR ES30V Power supply problem
Hello all...My machine is dead again...I replaced all electro caps and voltage divider MR1521 in power supply. Thanks ALComment
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Re: Panasonic DMR ES30V Power supply problem
Just a little more info that might help isolate problem. At one point I had power and stupidly touched metal when putting the P/S back in place, and something shorted out...the main fuse is good. I am getting voltage on half the (16) pins out...but 0 on the rest. The diode on heat sink is putting out voltage from center pin. I am getting voltage on one half of the board...but not the other. All help appreciated....Thanks AlComment
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I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
I did not have any 27uf @ 50 volt capacitors but one nice thing is that it has enough room for two capacitors in parallel a 22uf and a 4.7uf @ 50 volts 22 plus 4.7 equals 26.7uf which so very close to 27uf I will show some pictures of it sometime tomorrow
This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board
After all of... -
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles...
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