Question about Panasonic DMR-E55 DVD Recorder

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No 7.5V supply to fan

After replacing IC001 machine functions perfectly (using temporary cooling)
Circuit Info required re source of 7.5 fan supply.

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Re: No 7.5V supply to fan

Palmbeach has the correct diagnosis. The heat sink fitted to the IC001 is not adequate. I have removed screw and fitted an additional heat sink to the FRONT of the IC. The original heat sink is fitted to the BACK. Put a spot of thermal compound on the front and back of the IC.The additional heat sink is made from a piece of aluminium strip 30 mm wide and cut to 65mm (or there abouts) long. Cut two slots to clear the original heat sink where it is bent round at either end. The strip is 2.5 mm thick. Remove the self tapping screw and replace with a longer machine cut screw and a nut. This allows you to get the correct tightness. You will have to drill out the hole in the present heat sink slightly so be very careful.
When testing the repair put the cover back on so that you get the correct air flow from the front of the case out through the fan.
As Palmbeach has said the fan is thermostatically switched and does not run all of the time. This mod can be done with the minimum of change to the original. About 20 minute task if you have the tools. Thank you Palmbeach

Posted on Feb 06, 2008

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Re: No 7.5V supply to fan

I agree with Palmbeach - The PSU board contains a number of Thermistors which are devices that change their resistance with temperature, therefore when the unit gets warm enough to warrant the use of the fan it will power up !...Revieski

Posted on Jan 09, 2008

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Re: No 7.5V supply to fan

Further to my first posting, my brother has the previous modele recorder his fan comes on as soon as the unit is switched on I was assuming the later model would do the same, can anyone confirm this ?

Posted on Dec 26, 2007

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Re: No 7.5V supply to fan

Before pulling out components, take into consideration that the fan does not necessarily operate as soon as the unit is powered. It should operate when the unit has been switched on for a while. Regarding IC001, I have long felt that this component should be bolted to a proper heatsink and fixed to the inside of the cabinet with a suitable insulator. DO NOT DO THIS WITHOUT A SUITABLE INSULATOR. The cabinet would make reasonable heatsink and IC001 would only get marginly warm.

Posted on Dec 26, 2007

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Unable to either use the remote or the buttons on the player to operate the player. The light is red, replaced battery, and still will not function. Isn't the light supposed to change to green?

The power board inside the DVD is burned/ damaged.You need to take it to the service center to replace the power unit.

If you know what to do, you can open the DVD case, then replace the power board.To locate it, simply follow the power cord, power cord attached to the power board.
Replace with same type of boards.

Mar 07, 2010 | Cyberhome CH-DVD 300 DVD Player


Cyberhome CH-DVD300 DVD Player

Symptom: Unit will not power up at all. Power indicator doesn't work.
or after inserting disk, screen says "loading disk" but then
says "bad disk".
Solution: This problem is usually caused by a bad 5Volt power supply.
Check the 5V output of the power supply board. The output
plug is clearly marked. If this 5V is less than 4V, the unit will
not operate. This is caused by defective filter capacitors in the
5V supply. These caps are easily identified. Replace these
two with the same values and the 5V should return to normal.
Note: Because of the confined spaces on the board, only use caps
that are of the same physical size. Capacitors are made in a
varity of hights and diameters with the same electrical
specifications. Do not try to pigtail a larger cap in circuit. The
circuit will not work correctly. I can supply these if you can not
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on Mar 28, 2010 | Cyberhome CH-DVD 300 DVD Player

4 Answers

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

1 Answer

My dmr e85h display "hold" for 5 sec and turn off

The power supply board on the DMR-E85H has problems. The earlier boards suffered from leaking capacitors and the later boards from voltage regulator problems. If your machine is now dead, the fuse on the power supply board has also blown.Go to the following links for details and photos on how to fix: Replacing capacitors: Replacing the voltage regulator: Hope this helps. My machine had the later ps board and the voltage regulator replacement worked perfectly.

May 21, 2009 | Panasonic DMR-E85H DVD Recorder

1 Answer

Self check

Unfortunately, none of that will fix your machine, as this is a common fault with these units.
Fortunately though, it can be fixed.

In 99% of cases this is caused by a faulty regulator on the main power board.

The power board is located on the right hand side of the unit. The regulator is IC001 which is mounted on a thin metal strip which acts as a totally inadequate heatsink. This means that this component constantly works at temperatures beyond its tolerance.

Because of this it usually lasts a couple of years and then starts causing problems. The Self Checking syndrome is typical. If the regulator burns out completely, it can take other components with it, blow fuses and scorch the circuit board.

If you are competent in using a soldering iron with care, order an STRG 6353 regulator. These can be obtained online from a number of suppliers.

Disconnect your DMR E55 from the power source and remove the lid. Next, remove the fixing screws from the circuit board on the right where the regulator is located. Carefully remove the multi connector on the left side of the board. Remove the screw above the power connector on the rear of the unit. The power board can now be removed from the cabinet.

Using a small pair of wire cutters, clip all five pins from the old regulator as close the the top of the board as possible. Undo the screw securing it to the heatsink and remove the old regulator which can now be thrown away.

Next, using your soldering iron, remove what's left of the pins from the printed board and with desoldering braid, clear the holes ready to accept your new regulator. Be careful because if you over heat the print it can lift away from the board.

Use a little heatsink compound on the back of your new regulator, poke the pins through the circuit board and then secure it to the heatsink. I usually fit an extra heatsink on these units which helps to reduce heat and prolong the life of the new component.

Next, resolder the 5 pins on the print side of the board. Use a magnifying glass and make sure you haven't missed anything or bridged connections in error and caused short circuits.

Now put the board back. This can be a little tricky but it's easy enough if you take care. Refit all the screws and carefully reconnect the multi connector.

If you have followed this correctly, switch the unit back on, pop in a DVD and give it a try. Unless you are very unlucky, Your DMR E55 will no longer repeatedly self check and will operate correctly.

Whilst it saddens me to hear that some of you guys would toss your DMR E55s into the trash can for such an easily repairable problem, please do not attempt this unless you are confident in your own ability.

If anyone tells you the laser is shot or the drive needs replacing, take absolutely no notice of them because they don't know what they are talking about. The above solution WILL fix your machine if you follow the instructions correctly.

Finally, do check that the fan operates but remember it is temperature controlled and will not activate until it is needed. Do not assume it is faulty because you do not see it working straight away. I have repaired lots of DMR E55s and I have never found a single fan or fan control circuit to be faulty. That's not to say it can't fail. good luck

May 22, 2008 | Panasonic DMR-E55 DVD Recorder

4 Answers

Cyberhome CH-DVD 300 DVD - YELLOW light indicator of what problem?

Marlin P Jones & Assoc. Inc.. has a 5V 2.2A /12V 1.5A cord power supply that will fit into the space where the original power supply was! Lists for $6.95 but online price was $2.95. Works great! Connect 12V supply to the yellow lead and the 5V to the red lead of the output connector, black is ground, common to both supplies. Use QC terminals to the power cord input terminals, remove the cable clamp and the power supply will nestle beautifully in the space without need for support. (Remove the old circuit board plastic (3) and rear brass standoffs and use the front brass standoff for the output cable shield ground connection. (Part No. is 15955-PS) I bought two because I have a 2nd Cyberhome CD-DVD 300 which hasn't crapped out yet.

May 15, 2008 | Cyberhome CH-DVD 300 DVD Player

2 Answers

Power on but nothing else

My DVD22 did exactly the same. The solution mentioned by shelompidid not apply to me since my model already had the fix factory fitted.

The other problem mentioned on page 21 of the service manual did the trick for me, although the complaint does not seem to be directly relavant:

"Complaint: Will Not Read Disc; Other Functions May Be Disabled
See h/k service bulletins HK2004-03 and HK2005-02, as the issues covered there involve similar
Probable Cause: EC19 and EC20 (1000μf 16v capacitors) may be defective in the power supply. This can be checked by measuring the +3.3v and +5v voltages that are associated with EC19, 20 to see if they are low (more than 0.1v low). The SPMS output voltages are marked on the PCB adjacent to the large 13 pin header. While there is only one 3.3v pin, there are several +5v pins, and care should be taken to measure the correct one(s), which are either two +5v pins approximately in the center of the header.

I could actually see on the power supply board that these two caps were damaged, although they were not completely popped. An additional cap which was damaged on my board was EC4.

When I measured the voltages the middle D +5V was reading about 4,6V. I did not expect a problem until I read the statement above on page 21 stating it should not be low by more than 0,1V. My A+14 and A-14 voltages also read about +/-17 to +/-18V.

I replaced all three caps: EC4, EC19 and EC20 with 25V caps instead of 16V caps. The voltage for D +5V now read exactly 5,01V! The A+/-14 read +/-16V (some improvement).

My unit is operating fine after replacing these 3 caps! I suspect that the damage to the caps could have been spikes on the AC suppy some stage, maybe due to lightning. Pretty amazing that only the power supply have damage and not the main pcb.

May 06, 2008 | Harman Kardon DVD-22 DVD Player

2 Answers

DMR E55-P will not read DVD-R

Hi Benyto

Thank you for the information. Sorry that you are having such problems.

Nearly all the problems on ths DMR E55 are due to a faulty power board. The greatest load on the power supply is when the unit first reads discs and also when finalizing. Sometimes the unit cannot read discs and sometimes it continuously self checks.

Try replacing IC001 on the power board. This is a 5 pin regulator #STRG6353. This component gets very hot and the heatsink is poor. When I replace these, I use a larger heatsink and some heatsink paste which helps to prolong the life of the component. If you look at the regulator, you will see by the colour of the circuit board that it gets very hot. It fails after two or three years in all DMR E55s.

Be careful when you take the old regulator out because the print can lift away from the circuit board.

I have posted full instructions on how to replace the STRG6353 >HERE<

Hope this helps

Mar 02, 2008 | Panasonic DMR-E55 DVD Recorder

3 Answers

Trouble with my Panasonic DVD recorder DMR-E55EB

Hi Dengle

The heat is caused by IC001 which is a regulator that is mounted on a completely inadequate heatsink on the power board. This component gets very hot during normal operation.

The regulator will usually last a couple of years, depending on how often the machine is used and then start playing up. The symptoms are intermittent operation, continuous self checking and rebooting, not being able to read discs and so on.

Eventually the component can short-circuit, burn out and take other components with it. The on-board fan is thermostatically controlled. It does not operate all the time, only when the unit gets hot enough. By using an external fan, you are keeping the unit cool enough for its own fan never to cut in. The additional cooling is probably squeezing a bit more life out of the regulator and is stopping its own fan from operating.

I have repaired lots of these and have never found a faulty fan, or fan switching fault. There's always a first time of course.

It is more likely that the regulator IC001 is faulty and if you are technically skilled, I would suggest you seriously consider replacing it. Use some heatsink compound and an extra heatsink, and it will probably do the trick. The regulator is an STRG6353. You can get these easily online from a number of outlets. Don't attempt a repair if you are unsure of what you are doing. Regards..

Nov 18, 2007 | Panasonic DMR-E55 DVD Recorder

10 Answers

Powerdown after a few seconds

Amazing - I have exactly the same symptoms on my DMR-E55EB - noticed the dead machine on 19/11/6 - tried several powerdown resets, gained a few tens of seconds operation each time, and after around 6 attempts it died completely. Will open it up and have a look...

Nov 13, 2006 | Panasonic DMR-E55 DVD Recorder

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