Question about Panasonic DMR-EX75EB-S DVD Recorder/HDD Recorder

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

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  • Panasonic Master
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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.

Posted on Mar 14, 2011

Testimonial: "Many thanks for your input, after speaking to Panasonic, you are correct, they tell me it would cost approx £100 to repair so its a bin job:-("

  • 1 more comment 
  • Demonic-2011
    Demonic-2011 Mar 15, 2011

    Sorry about that, but sometimes it happens. These days, DVD/HDD recorders are becoming cheaper to buy while repairs on the same become more expensive. I am relieved that so far it hasn't cost you a penny in repairs, but sad to learn of the outcome (not worth fixing - throw it in the bin). You could always keep its remote - just in case.

  • s_wood83 Mar 15, 2011

    "Thats life" although I am hoping that I can remove the HD and get a friend of mine to retrive the contence

  • Demonic-2011
    Demonic-2011 Mar 15, 2011

    Sounds like a smart idea - retain as much of this as you can. Spare parts in case you get a similar/identical model later which may have a fault or the remote missing. Never throw all of the faulty unit away - salvage parts first - if you can; especially the hard drive and/or the DVD drive too if that's not broken. Best of luck in the hard disk salvage operation.

    Today's technology; cheaper to buy, but more expensive to repair when it breaks down.

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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

Fault A2


Are you SURE it's a fault code, and not the selected AV input? (A1, A2 or A3?

Press the Input Select button on the remote to cycle between AV inputs and Freeview channels

Jun 22, 2014 | Panasonic DMR-EX75EB-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

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

My DVD RECORDER MODEL NO DMR-EX75EB, THE CODE U81 KEEPS COMING UP WHEN I SWITCH ON MY RECORDER, ALSO I CANNOT GET INTO MY SETTINGS TO SEE IF I CAN FIX IT. THANK YOU


This seems to be a common fault 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.

I posted this 'advice' for this (and a couple of similar models) 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.

Because of the malfunction, the user settings and options are inaccessible, and there is no official user-reset option on this or any model of the series to clear this particular error.

Certainly worth investigating at least, as Panasonic usually make great products.
It's up to you as to what you decide to do from here.

Mar 28, 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...

4 Answers

DMR-EX75 error U81 has occurred. an online forum suggests this is an internal software error & unit should be replaced.However, the unit is now working fine (after a bit of off/on shenanigans).With 1 month...


I had this problem when first bought player, and as you checked on forums which suggested software error and said get replacement. Took to approved repairer who had it on test bed for 2 weeks with no problems. Brought it home connected it up and since then (6 months) no error codes. Think my problem was caused by connecting cable to AV1 rather than AV2 as I have now (HDMI cable to television) but could just be a coincidence. Probably a bit simplistsic and you may have already tried this but thought worth mentioning anyway - good luck!

Nov 22, 2007 | Panasonic DMR-EX75EB-S DVD Recorder/HDD...

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