Question about Samsung DVD-HR720 DVD Recorder

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Faulty power supply board

Hi, I have just had my recorder checked out as all displays failed while in stand-by. I was told the power supply board had a fault, and was no longer available. Can you suggest any sites for a replacement?

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  • david182 Oct 03, 2008

    Hi, can you tell me what component it was you found to be faulty on the power supply board, it might be worth trying a replacement component rather than scrapping the whole machine.

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1 Answer

I have exactly the same problem. Indeed the power supply was defect. I have repaired it. Now the display is working but it is still not working : It displays LOADING... and that's all. Probably the controller card (the one with the LSI LOGIC chip) is also defect. It is impossible to repair, it has to be replaced.
I think this recorder is not 'CE'.

Posted on Oct 01, 2008

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I have an SR-DVM700EU that would not power up. I have replaced multiple failed components in the switchmode power supply, and it now works. The unit would power up but stop someway through the booting...


Did you replace ALL the electrolytic capacitors in the power supply? Generally, whenever there are several faulty components in this part of any circuit, it is a good idea to replace all of the caps as well as checking for leaky diodes and faulty IC regulators.

My guess is that the SMPS still has an intermittent partial fault, which is preventing the unit from staying on. I would recommend that you check the ICs in that circuit, replace as required (if you haven't already done so). These can be 3-pin or 5-pin regulators, but they are voltage rated, so obtain the correct types for this model if you do decide to replace them.

I hope the fault hasn't spread to the microprocessor on the main board - this can be expensive to replace if faulty. I would recommend that you re-check the power supply again - thoroughly. Touch up potential dry solder joints if necessary.

If the unit still misbehaves after all of this; perhaps it's time to consider submitting it to a workshop, get a quote (and a second opinion) on the likely cost(s) of repairs, then you can make a decision afterwards as to whether or not you wish to go ahead and get this fixed for good. It's up to you.

Mar 11, 2011 | JVC SR-DVM700 DVD Recorder/HDD Recorder

1 Answer

Power supplierd but does not start recorder no


Hello:

If the unit is competely dead, then you may of blown a fuse or the power supply has failed in the unit. If you take off the top of the unit while unpluged check the fuses near where the power cord attaches to the inside of the unit this is the power supply area, If you have indicators lit or the display is coming on then the unit may have a bad power supply or the System control board has failed. It which case its cheaper to just purchase a new unit.

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The unit failed during self check, probably the power regulation board. A check by a qualified TV/VCR repair person is in order.

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1 Answer

Unit will not come on.


check the voltage of power supply,and the voltage to board, if has no reading in board maybe the regulator on power supply is not working

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1 Answer

Drm-2001g turn on says hello that all


If you are comfortable with electronics and using a DMM, you could remove the cover and check the voltage on the power supply. Likely you will find that a few capacitors on the power supply have leaked onto the board, or are bulging on the top. If you can replace them with equivalents, it may bring your machine back to life.
This unit runs extremely hot, and capacitors, electrolytic anyway, will dry out and fail. There is a 'gel' inside that just dries out. That is why the fan blows on the power supply in later models.
You might also have a failed hard drive. You can substitute a known good disk. Make sure the jumper settings are the same. If that is the problem, it will take a few minutes after you power on for the machine to finish setting up the disk.
tom

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1 Answer

Dead power supply.


Faulty power-supply symptoms:

The front panel display and buttons are completely nonfunctional and appear dead. The unit will do nothing more than display the following messages on the TV screen:

Interface error
(and or)
Interface error! Turn off the power

If a DVD or VHS tape was inserted prior to the error occurring, you won't be able to eject either from that point further. They'll remain stuck inside the unit until you've completed the repair detailed below.

Interface error! Turn off the power <--- explains how to completely restore your combo in less than 20 minutes by replacing a $1.59 part on the power-supply board. mikeadams110@yahoo.com

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2 Answers

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I have a solution to power it on again quickly. Unplug the power cable, short out the pins in the power socket in the back of the machine ( NOT THE POWER CABLE ) and plug the power cable back in - it should go into standby mode immediately. I think the problem is caused by a capacitor on the power supply board going faulty with age. I have not had time to open the machine to check yet, but I will do so soon.

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5 Answers

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My dvd DMR-E85H frequently displays self check, then goes blank
for long periods before eventually starting.

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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

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