Question about Panasonic RX-D12 Cassette/CD Boombox

3 Answers

Error code U01

Dear all. The Panasonic RX-D12 have on display error code U01 and doesn't work in any option. I've found transistor Q308 but I haven't service documentation therefore apply to you If you could help me to identify type of this transistor (PNP or NPN and parameters). Best regards

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  • Tomhas1 Sep 09, 2007

    Could you please send me this manual?
    Thank you

    Best regards

  • Tomhas1 Sep 10, 2007


    Thank you

  • Georges38 Jan 20, 2008

    I have identical problem: on power up, a Panasonic RX-D21 CD-Tuner-Cassette player shows code U01, does not respond as Tuner or CD player. It can read audio cassettes but vith very low volume output.

    Does the code mean anything?

    I could download a manual from

    but it does not mention the error codes.

  • Georges38 May 11, 2010

    Addressing TVtechmaniac:

    I saw your proposal of Sept 09, 2007 to Tomhas1 to send the service manual for Panasonic RX-D12. What I have is a Panasonic RX-D21 CD-Tuner-Cassette player (see my post of Jan 20, 2008). Do you think that the service manual for RX-D12 could help me? I do not dare to hope that you also have the service manual for RX-D21.

    In any case, my Email address is

    With all my best wishes, and a great hurrah for such a site and forum to exist.



3 Answers

Hi TVtechmaniac Thank you very much for posting the ref of transistor and to propose the service manual. My Email address is: It replaces the one I gave earlier. I would really enjoy getting the tech. manual.

Posted on Oct 02, 2008

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Q308 is KRA102MTA


Posted on Oct 01, 2008

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  • 140 Answers

The part# for Q308 is KRA102MTA I have the service manual if you want it

Posted on Sep 09, 2007

  • David Makowski
    David Makowski Sep 09, 2007

    I need an email address to send you the pdf file


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These error codes apply to many HP & Panafax machines
001 recording paper jam
002 recording paper jam
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015 out of ink
017 wrong paper size
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039 during dialing, STOP was pressed
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061 a cover or door is open
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405 during initial handshake a comm error occurred
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409 remote side confirmation of previous page is illegible
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417 received data has too many errors
418 received data has too many errors
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427 interface is not compatible
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434 comm error occurred while receiving
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492 comm error occurred while receiving
493 comm error occurred while receiving
494 comm error occurred while receiving
495 telephone line disconnected
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541 comm error occurred while transmitting
542 comm error occurred while transmitting
543 comm error occurred while transmitting
544 comm error occurred while transmitting
550 telephone line disconnected
552 comm error occurred while receiving
553 comm error occurred while receiving
554 comm error occurred while receiving
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