Re: C65 keyboard repair

From: Michał Pleban <>
Date: Mon, 10 Oct 2016 12:24:26 +0200
Message-ID: <>

Simon Laule wrote:

> Interesting find.
> Can you check the revision of board and keyboard?
> Afaik all c65 keyboards (including the prototypes/samples) were made by Mitsumi.
> There should be paper sticker with the part number on the back. For the German keyboard this is 50910712.
> Might be that they changed the keyboard during development.
> If needed I can disassemble mine.

My board is rev. 2B.

The production keyboard (with correct pinout) has a sticker which only
says "Mitsumi". Nothing more.

The Ebay keyboard (with incorrect pinout) has a sticker which says:

Model KPR-A77YC
Production-Off-tool SAMPLE
R56-8057 ("8057" is written by hand)
No. 2100-86 (or possibly "4100-86", it's also written by hand)
Date 89.12.20 (written by hand)
Approval (circled by pen)

If you can diassemble yours, it would be awesome if you could check
which pins go to the LEDs. The correct pinout for LEDs is pins 1, 2 and
3 (pin 1 is at the top of the cable). Incorrect pinout is pins 1, 2 and 25.


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Received on 2016-10-10 11:00:02

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