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 Al
ALPUG60
Member
Last Activity: 12-13-2020, 02:31 PM
Joined: 02-05-2018
Location: NEW HYDE PARK N.Y.
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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 ALLeave a 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 AlLeave a 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 AlLeave a 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 AlLeave a comment:
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Re: Panasonic DMR ES30V Power supply problem
The half of board with ac cord ...gets power the other side does not...Leave a 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 AlLeave a comment:
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Panasonic DMR ES30V Power supply problem
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 -
Re: RCA VCR MODEL VMT-400 Problem
I checked voltage to capstan motor...and none is present. Harness to drum motor has 12 pins...getting 10.6 v on 3 of them nothing on others. Mode switch is working properly. Do you think anyone might have schematic? If not, it might be time to say good-bye. In any event thanks TJ for all your help and stay safe!
ALLeave a comment:
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Re: RCA VCR MODEL VMT-400 Problem
Yes, you were correct. The P/S came out with 2 screws. I measured AC going in (120v) and out of transformer are 9 pins. They all show DC current measuring from 28v-10v. So it seems the DC is going out. Unlike schematic, there are no voltages noted on circuit board. Thanks ALLeave a comment:
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Re: RCA VCR MODEL VMT-400 Problem
The lamp is infrared...impossible to tell if lit. But if the lamp was burnt out I don't think the tape up rollers would pull the tape to the head. The 3 power line fuses all check good. I traced harness from video head motor to circuit board, and no bulging caps. Do you believe the capstan motor would not function if the video head don't turn? It is very difficult to check voltages from power supply, without pulling half the set apart. Where would I find the mode switch? Thanks AlLeave a comment:
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Re: RCA VCR MODEL VMT-400 Problem
The video drum does not rotate. The loading motor is the only motor working...The tape up rollers go all the way up ( belts are good) When rewind and ff is pressed the clutch moves to proper spindle but does not turn ( since the capstan motor is not functioning) I traced the wires coming to the capstan motor from the circuit board...I was hoping to find some bulging caps ....but all look good. Thanks AlLeave a comment:
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Re: RCA VCR MODEL VMT-400 Problem
Thanks for reply RJ.....All belts are good. Capstan motor on top of large pulley, controls almost everything (play, ff, rew) It is not engaging after tape rollers pull the tape to head..therefore rollers pull back to position and unit goes to STOP.
Two pics enclosed...Thanks Al...Leave a comment:
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RCA VCR MODEL VMT-400 Problem
Hi all this is a shot in the dark...but VCR loads...but no other functions. The main capstan motor which controls most functions does not activate. Motor checks out good. Maybe someone has circuit board location , and common cap problems. Its been a long time without use...Thanks Al -
Re: SAMSUNG UN46D6420UFXZA bad t-con
I guess its a bad panel...and time to e-bay boards. ALLeave a comment:
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Re: SAMSUNG UN46D6420UFXZA bad t-con
The long boards are on bottom of set...I will send pic...Leave a comment:
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Re: SAMSUNG UN46D6420UFXZA bad t-con
I should mention... with both ribbons connected there is a horizontal line about 2 inches wide across bottom of screen. I could barely see menu when pressed, but it is there very blurry. If this makes difference? ALLeave a comment:
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Re: SAMSUNG UN46D6420UFXZA bad t-con
I checked all the caps with meter, and I am getting cap action ...none shorted. Is there a voltage check I can do on caps? Would that pin point problem? Thanks ALLeave a comment:
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Re: SAMSUNG UN46D6420UFXZA bad t-con
Thanks for reply.....The problem is the board can not be removed, the ribbons (3) seem to be laminated on. But can I assume the caps (micro small) are labeled 'C' on circuit board? Thanks ALLeave a comment:
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Re: New Members - please post your introductions here
Hello all....My name is Al, I live in New Hyde Park N.Y. Back in the 70's I was a repairman for Sunbeam. I repaired small appliances like toasters, irons, hair clippers, blenders, hair dryers, mixers etc. Most of these items have been disposable for decades. I have been repairing and restoring antique radio's and phonographs for many years. I enjoy it as a hobby...in between 35 years of law enforcement. Happy to help anyone with problems in my area of knowledge. Happy New Year to all.........ALLeave a comment:
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