Question about Panasonic DMR-E80H DVD Recorder

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I have an error message U81. The DVD recorder

I have an error message U81. The DVD recorder will go on to standby but when I press power the error message comes up.

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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.

Posted on Feb 05, 2010

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1 Answer

What does U81 mean


It could mean there is a fault on one of the circuit boards. See
http://www.avforums.com/threads/panasonic-dmr-ex75-85-u81-error-repaired-solved.1486954/

Aug 25, 2014 | Panasonic DMR-EX75EB-S DVD Recorder/HDD...

1 Answer

Panasonic dmr-ex79 u81 fault


It appears the hard disk is either faulty or it needs reformatting.
I suggest to get a TV serviceman to fix this problem.

Mar 03, 2013 | Televison & Video

1 Answer

Dmr-ex85 shows u81 code and is not functioning at all, says please wait but eventually just goes onto error code. no buttons will function?


Physically unplug power from the unit for a minute or two.
Connect power cord to unit and Simultaneously Press & Hold
both the [STOP] and Channel UP [^] for 5 seconds. This will
force Eject the DVD tray. Remove any disc if present.
Cycle the power again if necessary and wait for the unit to
go through its self check cycle. If after several attempts, and
you continue to get this error, then your Ram drive may need
to be replaced.

Jul 12, 2011 | Panasonic DMR-EX85EB-S DVD Recorder/HDD...

1 Answer

U81 is permanently on the screen, I cant get the TV listing menu, nor can I get it to record, can you help?


U81 error literally means 'Microprocessor Communication Error on the Universal asynchronous receiver/transmitter'.

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.

If you turn the unit off for 30 minutes it should reset the fault.

At this point to need to check what version of firmware you have installed and then check the Panasonic website for your country for the latest version.

Jul 02, 2011 | Panasonic DMR-EX75EB-S DVD Recorder/HDD...

1 Answer

U81 error up Do I have to take it to a electrical repairer or is there anything i can do ?


I posted a suggestion a couple of months ago about a similar Panasonic DVD recorder (model DMR-EX78EB) with this exact problem:

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.

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; and you should not need to purchase a new unit. Go with the quote first - then decide on a further course of action.

May 24, 2011 | Panasonic DMR-EX85EB-S DVD Recorder/HDD...

2 Answers

I have a Panasonic DMR-EZ47VEB and after recording overnight next morning dicovered the machine had swiched off with the word"Hello" on the front display. When switched on the unit displayed the...


U61 is a common fault in the Panasonic DVD recorders. It is generally a failure of the DVD-RAM drive and/or the digital controller board (in some cases it is both and both must be replaced together as a module). Unfortunately these are not repairable at individual component level; they would most likely need to be replaced and fitted by a qualified technician in an authorised Panasonic service centre. The only trouble here is the potential cost(s) involved (such as labour, the DVD drive, etc) - could be expensive and/or uneconomical. However, you can always submit your unit to a repair shop for a quote and a second opinion (on the costs of the replacement part(s) as well as estimated labour charges and the extent of the problem - this allows you to make an informed decision afterwards to get this fixed, but it is up to you.

The cost of a new DVD-RAM drive (if that is the actual problem, and not the board it is connected to) is quite high; anywhere between $130 US (for XVY1961 to suit DMR-ES35V/DMR-EZ47V models) up to $450 AU for the same device plus labour costs should you choose to have it replaced.

I assume you like your unit and want it working properly. If you do decide to deal with an authorised Panasonic service centre, ensure that when the work is completed they provide a detailed report, and some sort of warranty on that repair, especially if it involved replacing the DVD drive. Unless you have an extended manufacturer's warranty on this; which means it won't cost you anything to have it assessed and repaired fully.

Apr 21, 2011 | Panasonic DMR-EZ47V DVD Recorder/VCR

2 Answers

Error code U81 onDMR-EX75EB Unit will not power up, keeps shutting down


I have posted advice on the possible cause behind this error code (as well as other members on FixYa) for this model DVD recorder previously. For you I will re-iterate:

The U81 error code is a common problem
with many Panasonic DVD recorders of the DMR-EX series.

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

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 (if available) 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.

(sometimes unplugging the unit from the power point for up to 30 minutes, then reconnecting resets it completely and clears the error code with no further remedial action required)

Usually when this error occurs, and persists, the unit cannot be reset by the user. In your case, the constant shutdown may also likely be a fault in the switchmode power supply as well as a problem with the microprocessor. It may or may not prove an expensive exercise.

Certainly worth investigating at least.
It's up to you as to what you decide to do from here.
I hope I have shed some light on the subject for you and similar people who have experienced this particular error display.

Apr 03, 2011 | Panasonic DMR-EX75EB-S DVD Recorder/HDD...

1 Answer

DVD recorder DMR-EX78EB - Keeps showinf error message 'U81' on display. This means that it does not perform set recordings. What causes this please and how can we fix it as I am fed up with finding...


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.




Mar 24, 2011 | Panasonic DMR-EX85EB-S DVD Recorder/HDD...

1 Answer

My DMR EX75EB it fails to operate and a code of U81 comes up.


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.

Mar 14, 2011 | Panasonic DMR-EX75EB-S DVD Recorder/HDD...

2 Answers

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


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.

Jun 02, 2010 | Panasonic DMR-EZ47V DVD Recorder/VCR

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