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Also looking for a AM871B transformer! Please help!

Hi, my power supply also burned through. Has anyone been able to find a place where you can get one? Or any fix? Please please Email me at: So many thanks!

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SOURCE: Transformer

The Power supply was made to fail on this model. I would recommend using a Regular Computer Power Supply. It would cost $20 to $30 dollars for a brand new supply if you don't already have one to use.

Posted on Mar 27, 2007

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I have no power to the unit. I took off the cover and nothing is moving. Fan twitches but does not spin. No lights or response from anything else.

Hello StretchGT hi, you have power supply problems, check first the fuse, that the only thing you can do. Locate the Power Supply section (usually with big capacitors and transformer., Smell for burned parts? Well if its a fuzz for you, buy a new DVD its cheap nowadays, cyberdyers_1.jpg

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Hi had my sony dvp s725d from new 1999 and loved it, the problem is it switched off during playback, i thought it was a blown fuse but umpteen fuses later i came to the conclusion that it hadn't blown at...

First check the power supply after it has reduced the voltage and DC supply. That circuit is at fault & change it if available.......................sodeep

Sep 24, 2009 | Sony DVP-S725D DVD Player

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No power when plugged in. On off button stays dark, nothing works

Everyone has problems with SMPSs; mine started in 1971 when IBM was first using them; they were literally blowing up and throwing molten copper several feet.
Anyhow, if you have the benefit of a capacitance meter with DF function, check the main filter caps all of the smaller caps. The quality and durability of electrolytics is bad and getting worse and once one of these fails anywhere in a feedback path, the supply will not start. HF is hell on electrolytics.
The (ferrite) transformer in a switcher measures very low on the Ohms scale; depending on power handling and service frequency, primary <<100 Ohms, secondary from 0.? - 10 Ohms between taps, because they operate at higher frequencies. The 50 volts from the diode bridge is way too low; you probably have failed 100-200 uFd. electrolytics right close to them although this is fairly rare since they are only working with 120 Hz. From a 120 VAC line, you should have ~ 160-170 DC volts at no load if the caps are still working as they should and you have no notable resistance between the AC and the diodes.
Well-designed switchers are wonderfully efficient and very reliable if the maker didn't cheat on component quality. I've repaired literally thousands as a sideline in a now retired business and after studying them and adding a ceramic cap.or two and better quality electrolytics, they will run for decades. At one time, I had standard repair prices on ~ 70 different models.
My guarantee was 'lifetime' and that was limited only because I retired.

Aug 20, 2009 | Toshiba SD-K760 DVD Player

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DVDR05 Power Supply Board: No output, top blown

Try a small sledge hammer for some up close and personal work.

Feb 21, 2009 | iLO DVDR05 DVD Recorder

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The power supply of my pioner dvd was burn


check all semiconductor in the power board and look for a shorted and open parts! then replaced the defective parts.


Dec 05, 2008 | DVD & Blu-Ray Players

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I own a panasonic dmr-e85hp

possibly a bown fuse. Please check that first, got warranty on it?

Sep 25, 2008 | Panasonic DMR-E85H DVD Recorder

2 Answers


The Power supply was made to fail on this model. I would recommend using a Regular Computer Power Supply. It would cost $20 to $30 dollars for a brand new supply if you don't already have one to use.

Aug 24, 2006 | Apex Digital DRX-9200 DVD Recorder

2 Answers

Dvd player is completely dead.

First thing to check is the power cord with it unpluged. Do you get a resistance there or is it open?? If its no reading at all then the power transformer or fuse or current limiter resistor is open. If you do get a reading then you know your power transformer primary is good. Next measure the AC volts comming from the secondary of the transformer. AC volts? Good! Now Find pin 1 or the end pins on the microprocessor. 5 volts present?? No theres your problem get a schematic and troubleshoot the power supply. Yes 5 volts? Measure the display any volts on it?? Ok im sure by now your gonna say no to one of these and like I said get a schematic and conferm all the voltages are present in the power supply. Most common dead problem in dvd/cd players is the power supply ie transformer,regulator, ic, ect, ect. Good Luck

May 10, 2006 | LG DVD 5183 DVD Player

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