Question about Pioneer DVR-520H DVD Recorder

2 Answers

My DVR 520H will not power up. If I turn it on it will display "Power on" for a while, then try to shut itself down for a second, then try to restart and display "Power on" again, and continue to repeat the process. While this is going on, the Timer icon blinks continuously (as it does when the machine is simply plugged in with the machine off). None of the buttons on the machine function in this state. I can only shut it down by holding down the On/Standby button for 10 sec. Before this prob, the DVR was failing to burn full programs to DVD, burning 2/3's to 1/2 of the show. Is it worth repairing, or should I just buy a new DVR? Thanks for your help.

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  • pdsf Mar 22, 2011

    Opened DVD tray only way I could by using paper clip into hole by tray door. Saw no foreign objects/blockage. I can't access/reach the optical unit thru the tray door (or after taking off the unit cover). I don't have equipment to check the voltages of the drivers or processor.



    I saw a post (a few yrs old) where someone had my same problem, but no one replied with an answer. Any other ideas? If it's a driver/processor problem, is it worth repairing?

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  • Master
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HI pdsf,
This is an indication of faulty power supply or the main board. Check the power supply first if there is an out of regulation which dropped the output voltage from normal. If you have a multimeter check it, you're reference voltage is printed in the board itself. If you found one, this is caused by leaky/dried electrolytic capacitor in that section. If the output voltages is quite normal, the fault is in the main board. The problem is, this board is not repairable. Only way to solve the problem is to get the exact replacement board from your local Pioneer service center. If you don't have necessary tools and test instrument I would advice you to send it to Pioneer repair shop. You may ask first an estimate for service fee plus parts to have an idea whether to send it for repair or buy another unit.
Hope I helped you. Have a nice day! Thanks for using Fixya.

Posted on Mar 22, 2011

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  • Pioneer Master
  • 17,129 Answers

This is a error indication as the main processor does not get the feedback from the circuit and so shuts off. the fault can be from a number of reasons;
please check on the following tips.
1. Possible block or mechanical jamming of the drive-both loading/eject- as the half position of the mode is trying to get the motor to reset to parking condition and having failed is cutting off.
2. Please check for foreign odjects that can block the drive.

3. Possible failure of the optical unit, try to attempt a cleaning of the lens drive.
4. possible fault in the drivers or the processor.

Check the voltages and confirm.

Posted on Mar 22, 2011

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Power supply unit failure


It could be the IC101 (MR2920) and the zener D104 both failed, or IC1 (MD5001T) failed as well, here is the link where I've descrived how I fix the issue on my DVR-520H, it is in italian but you can translate it with Google: http://www.plcforum.it/f/topic/181344-riparazione-guasto-alimentatore-pioneer-dvr-520h-dvr-520h-failure/

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No power, display or functions at all? It is likely that one or more components in the power supply are short-circuit, leaky and/or open-circuit. The trouble with switchmode power supplies is usually caused by (but not limited to) electrolytic capacitors - these fail in all sorts of ways including leaking or drying out due to their proximity to parts with heatsinks, such as IC regulators. The cost of repair depends on which service centre you take the recorder to, who you deal with, and the combined replacement parts/labour involved.

If you are prepared to spend a small fortune in getting this unit fixed, go ahead, get a quote for the likely repair cost FIRST; then you can make a decision afterwards based on the information from the repair shop as to whether this is economical to repair or not. You may or may not be charged a fee for the quote on repairs.

It is up to you. If you feel it might not be economical or cost-effective to fix this one, get the second opinion from the service centre first, then maybe later on consider a new machine if nothing else.

These days, products become cheaper to buy, but more expensive to repair.

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My Pioneer DVR-520H DVD Player works fine but sometimes when it is powered off the power just goes completely. When this happens I plug it into a different socket or just pull out the power cable from the...


Hi,
It seems problem with power supply board in Pioneer DVR-520H, possible causes for that symptoms are few dried up/ leaky capacitors, cold/ dry solder joints on circuit board or chip resistors would be devalued.
Local repair shop will help you to replace bad capacitors, chip resistors in power supply board to solve this issue if you are not familiar with soldering work in circuit board.
Hope these info will help you.
Let me know if you have additional question.
Thanks.

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I actually got the same problem.
Did you succeeded to solve it ?

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Hi All,

This is a power supply problem.... the MR2920 stanby IC miss behaved, it power off and fail to power back on.

Solution, get pioneer power supply replacement or take the dvd recorder to your local electronic service repair to take a look at the power supply circuit.

Best of luck
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1 Answer

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in the manual it says the DVR will shut down after 3 hours of inactivity . The DVR should put up a message to " press enter " to reset .

hope , it helps .

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Hi Saturn et al,
I had similar issues with my Pioneer DVR-520H. It completely went off for quite a while when it should be going to standby after a timer session. At the start it would come good after a few days. Eventually it went off altogether and nothing would bring it back.
With my father-in-law being an electronics person we investigated with the help of the service manual which I found on the net. The finger was duly pointed at the power IC (MR2920) on the power supply board (Pioneer will sell only the complete board). I ordered the IC from the UK (nikko-electronics.co.uk) GBP8.99 which was the only place I could find it online and soldered it in myself (easy, if you can solder).
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