Question about Panasonic DMR-EX75EB-S DVD Recorder/HDD Recorder
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Posted on Jan 02, 2017
SOURCE: Total lock up
The reason your dvd recorder keeps self checking is because there is a faulty regulator on the power board.
I have listed full instructions on how to fix this, but you will need to be able to use a soldering iron and exercise care. Alternatively you may be able to pass the instructions to someone who can repair it for you.
Do not listen to anyone telling you the laser is faulty, DVD drive unit is kaput, it requires firmware, software or any other useless upgrade, or that Panasonic will do it for the price of a small car! It is easy to fix..
I won't repeat the instructions here but if you look at my profile and search my DMR E55 solutions you will find it.
The regulator gets very hot during normal operation and it will eventually fail on all DMR E55s after a couple of years or so.
It was probably on its last legs and when you put the lead back in, you probably didn't disconnect the plug from your power socket and this caused a power surge which has finally killed it.
If you know what you're doing it's an easy fix.
It definitely does not need a software reboot.
I would be reluctant to use it again until it has been fixed because if the regulator overheats further, it could short circuit and cause other components to fail which would make the repair more difficult.
To check to see if there is a disc inside, unplug the unit from the mains, remove the two large silver screws, one on each side, then the three black screws on the back of the lid which can then be easily removed.
Next, remove the four small phillips screws that hold the top cover on the dvd drive. This is a large black plastic cover in the middle of the unit. The cover can then be taken off and disc removed if there is one inside. DO NOT TOUCH ANYTHING ELSE. replace the cover and screws, then repair the unit.
Posted on Feb 29, 2008
I had the same problem! I have the singnal connected to a digital converter box, to the recorder, and then to the tv. the digital channels work ok on the tv from the converter box. However, they do not work on the recorder.
Posted on Jun 03, 2008
Is your recorder hooked up to the new convert box for digital antenna reception?
I am currently researching the convert boxes for my dvd recorder. I found that some dvd recorders already have digital converter boxes already installed. This might be the case for you.
Posted on Sep 28, 2008
Dry joint - faulty capacitor on the PC board of the decoder. Found by wiggling the components and resoldering
Posted on Apr 18, 2010
SOURCE: My DMR EX75EB it fails
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:-("
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