Question about Panasonic DMR-EZ47V DVD Recorder/VCR

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The error message U81 comes on everytme I turn on the player. It also want play DVD's or allow me to change modes?

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U81 is an error message indicating a microprocessor communications error/problem. This can be from a host of issues; probably time to take the unit in for service.

Posted on Jun 02, 2010

  • Demonic-2011
    Demonic-2011 Feb 11, 2011

    The error code itself does not 'mean' anything, because the corruption could be a result of any one of a number of causes. U81 simply suggests a microprocessor communication error which prevents the unit starting up normally.
    Your best option is to have an authorised Panasonic agent check the PSU and all relevant PCBs within the whole device to eliminate any possible causes of corruption to the microprocessor. This is not a repair you should undertake yourself. Either way, this IC will need to be replaced if corrupted.

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I was hoping for a simple "Do It Yourself " fix. I hate wasting time and money on services which may not even fix the problem. I have tried the countless temp fixes like pressing the off button, simply unplugging the machine, pressing the eject buttons or pressing the stop and channel up buttons simultaneously or pressing the channel down and stop buttons simultaneously or pressing the eject and stop buttons simultaneously but none of these work anymore. My DVD//Video machine number is DMR-EZ47V.

Posted on Apr 07, 2016

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1 Answer

What does U81 mean


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http://www.avforums.com/threads/panasonic-dmr-ex75-85-u81-error-repaired-solved.1486954/

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This error can be caused by a number of different reasons but one of the most common is a software / firmware problem relating to the Freeview part of the unit.

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The cost to fix this unit depends where you go and whom you deal with. It is up to you, but be warned; if the unit needs a new DVD drive, this could prove expensive.

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This is one of several error codes generated by the main microprocessor IC which are tripped by corruption, preventing proper operation and which may require the processor to be reset (where practical) or replaced.

The U81 and U80 codes don't mean anything in particular because the corruption error(s) could be caused by a number of different reasons. It does not point to any specific one fault. This is where the confusion sets in as to the origin of the 'error codes' in any device.

U81 means (in technical terms) 'microprocessor communication malfunction' on the universal asynchronous receiver/transmitter' or 'microprocessor feedback information error'.

This is not something the user should undertake to repair themselves; it should really go to an authorised Panasonic repair centre. The cost depends on the parts used and the labour, however, it is not unfixable. You can always get a quote on this and a second opinion, then decide for yourself if it is economical or not.

I posted this 'advice' for this (and a similar) model previously. The DMR-EX series of models are prone to U81 - which is a common (and extremely irritating) error code. As I said, it is not unfixable, if you are prepared to spend a fair amount of money on the repairs by a qualified service technician in a fully equipped workshop with access to all the required components and service manuals.

Certainly worth investigating at least.




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This is one of several error codes generated by the main microprocessor IC which are tripped by corruption, preventing proper operation and which may require the processor to be reset (where practical) or replaced.

The U81 and U80 codes don't mean anything in particular because the corruption error could be caused by a number of different reasons. It does not point to any specific one fault. This is where the confusion sets in as to the origin of the 'error code' in any device.

U81 means (in technical terms) 'microprocessor communication malfunction' on the universal asynchronous receiver/transmitter' or 'microprocessor feedback information error'.

This is not something the user should undertake to repair themselves; it should really go to an authorised Panasonic repair centre. The cost depends on the parts used and the labour, however, it is not unfixable. You can always get a quote on this and a second opinion, then decide for yourself if it is economical or not.

I posted this 'advice' for this model previously. The DMR-EX75 and DMR-EX85 are prone to U81 - which is a common error code.

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I have an error message U81. The DVD recorder


These are error codes generated by the main microprocessor which are tripped by corruption, preventing it's operation and which requires the processor to be reset.

The codes do not actually mean anything at all because the corruption error potentially has a great many possible causes.
It does not point to any specific fault as such.

U81 error literally means 'Microprocessor Communication Error on the Universal asynchronous receiver/transmitter' but I dare say if Panasonic told you that , you would be no further forward.

Corruption can arise for many different reasons .. and is not surprising in a box that has an aerial feeding endless streams of complex data into it, has a mains connection with interference on it, has two internal data storage and retrieval systems, either of which can be problematic... and sits permanently bathed in electrical and radio frequency fields of varying intensity.

Causes can be difficult to identify and may be internal or external.
Such problems may be exacerbated during the transitional phase of the DSO [ Digital Switch Over ]

In practice, all one can do is follow good practices:
Don't stack gear - or give it plenty ventilation if you do.
Ensure good clean mains supplies.
Ensure a properly installed aerial system with sound connectors and adequate screening.... etc.

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and still if the problem presist install VLC player its an subsitute to windows mediaplayer.
for further troubleshooting i need your computer details like modle,make,operating system.

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