From: William Levak (wlevak_at_cyberspace.org)
Date: 2002-11-10 06:44:21
It sounds like you have a short on the cassette port. Probably one
of the transistors that drive the port (Q4, Q5, Q6), the voltage
regulator (VR2), or capacitor (C70). Since the operating conditions are
different, a marginal component may behave differently.
There may also be a marginal short on the connector or circuit traces.
Another, simpler possibility is that the connector does not line up
correctly with the card edge.
On Sat, 9 Nov 2002, Marko [iso-8859-1] Mäkelä wrote:
> I recently sold a C2N232 interface to someone in Germany. When he plugged
> it into cassette port #1, the computer crashed and sometimes went to the
> machine language monitor. A normal tape drive works in both ports, but
> the C2N232 only works in port #2. Does anyone have an explanation?
>
> The computer is a North American PET2001N32, and he uses it with a 220->110
> volt transformer that has enough wattage (400 VA). The only electrical
> differences between the C2N232 and the tape drive should be that the C2N232
> takes some power from the +5V line all the time, while the tape drive might
> not, and that the cassette motor power line is not connected to the C2N232.
>
> Marko
>
> Message was sent through the cbm-hackers mailing list
>
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