Re: plus4 power supply

From: Gerrit Heitsch <>
Date: Sat, 22 Sep 2012 18:38:54 +0200
Message-ID: <>
On 09/22/2012 06:22 PM, Nicolas Welte wrote:

> It's also interesting, that at least the first C64 PCB came with only
> one of the +5V pins wired internally. There is a note in the service
> manual that a wire is to be installed to connect the second pin. Why
> this was done is a mystery to me, since all C64 power supplies that I
> know, use only a single +5V pin. Even the power supplies that have all 7
> pins physically installed, have only a single +5V pin connected.

Yes, but it's not always the same pin for +5V. I found that out the hard 
way when making a connector for a C64 PSU to check the voltages. Some of 
the brick-type PSUs didn't show any +5V while a C64 connected to those 
PSUs worked. After taking a look at the pinouts I found out why, they 
used the other +5V pin...


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Received on 2012-09-22 17:00:44

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