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

2 Answers

Error code u80

U 80 keeps coming on display .switching unit off then on solves problem but is annoying when u have set recording and error code is on when u come in ,but has not recorded

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  • Jaymd May 01, 2008

    The screen went blank and error code U80 was displayed. I turned the unit off at the mains, waited a few minutes and on turning back on the faulyt had cleared. Since then I have discovered the following:
    From the Service Manual :-

    "U80 - ST Microprocessor Communication Error on Timer Bus"

    “U80” is displayed till Power Key is pressed"

  • uncletony Jun 09, 2008

    I had the same U80 problem while recording to the HDD - pulling the power plug and waiting a while fixed it temporarily. Eventually the error appeared more often so went to the Panasonic agents who installed new Firmware under warranty. Seems OK now.

  • Anonymous Jan 09, 2009

    I've recently bought DMRex75 and have seen U80 several times while scrolling though the freeview channels. Various posts on the net say it can be cured by a software update from Pannasonic but having called them thay say this is totally untrue !

    Others have suggested it is connected with DVD discs but mine has no disc present. Not sure who is telling the truth here ??

    cheers

  • Anonymous May 05, 2009

    same U80 problem but seems worse if hard drive has a lot of progs recorded. Any suggestions?

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  • 13 Answers

Some say it to do with a limitation of the number of channels the unit can store per mux, and the fault occurs when the unit tries to display the 'new channels available' message, with older firmware:

To prevent this happening you can try the following:

1) Reset the STB by removing the mains power cord and re-connect to mains.

2) Turn off New Service Message by:
a) Press Functions Key
b) Select To Others Menu
c) Select Display Menu
d) New Service Message = OFF


Posted on Mar 31, 2009

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  • 3 Answers

Take It To A Repair Shop And Let Them Put In A Security Code Or Look Through The Manual

Posted on Feb 01, 2008

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Posted on Jan 02, 2017

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RF CH21 simply refers to a channel that the recorder is set to and is the first channel it will display. For example, there is no CH20. Your recorder is trying to find stations on all its channels from CH21 through to around CH70 and when it gets to the end if it doesn't find any stations, it starts the process again. This will often happen when you first unpack the unit from new until it has been set up.

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