RE: Problem with 9V/12V

From: Baltissen, GJPAA (Ruud) (
Date: 2005-12-09 08:00:09

Hallo Per,

> My 1982 board measures 10/10/17 V. It looks like CR4 could be the
> culprit (likely, unlikely anyone?). It's a PITA to desolder, but at
> least it's cheap to replace...

Sorry for answering that late but I misplaced all the CBM-Hackers emails.

CR4 could be the cause. You can check that with the diode function of a
multi-meter even when it is on board. Otherwise desolder the input pin of
the 7805, C95 and C90 and measure the voltage again. If still 2.1 Volt, then
you are sure it is CR4.

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