RE: 1526 printer - repair(able) or not?

From: Hoffmann-Vetter, Martin <>
Date: Sun, 6 Apr 2014 14:11:36 +0200
Message-ID: <013901cf5191$5c078c20$1b09a8c0@mhvnb10>
Hello Ville,

> Also I am wondering that there is a brown cable coming out from the
> primary side of the mains transformer. It's not connected (the end of
> the wire is taped and it's hanging loose) to anywhere. Could it be a
> connection for wiring the transformer for 230V operation? That would
> ease testing of this a great deal.

You can measure the voltage between the brown wire and the other wires. If
the transformer has a 230V connection you must measure to one other wire
115V and to the other one 230V. So you can use the wires where you measure
230V for input with 230V. Then if you look at the wire with 115V, you must
find a junction for two wires out of the transformer. The 115V / 230V
transformer has two 115V coils. One i used for 115V input, both are used for
230V input.

> I have put some pictures of the board here:
> Any ideas?

Have you checked the /RES signal for the CPU? At the picture i see an EPROM.
The content of an EPROM can be non-permanent over more than ten years. You
can compare it!

The CPU needs RAM. This RAM is into the 6532. There are two 6532. Swap these
chips! The 6532 have no internally programming!


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Received on 2014-04-06 13:00:03

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