amiga

From: Gary Hildebrand <ghldbrd_at_ccp.com>
Date: Sun Oct 27 13:33:00 2002

Well it looks like your 12v line is a shade low, which could be due to
several things. One, if your drives are fed through several power "y"
cables, there may be losses in the connectors. Two, if the current draw
is excessive, the voltage may drop as well. Take out any extra y cables
and try again, and squeezing the pins of the connectors with a needle
nose pliers to tighten the connection may help too.

The PS in the Amigas are notoriously light, and with all the
peripherals, it may just be marginal enough not to deliver the full 12
volts needed to spin the drives at the right speed, hence booting
errors.

Try powering the hard drive from another power supply, and move the
floppy to it as well, and see what happens. If everything works okay
from there then the internal PS is just not pulling the load as it
should.

The DSDD drive should work in place of the stock DSHD drive (should be a
Chinon FZ357A) with the proper jumpers. Since most Amiga software is
standardized on the DSDD drive and 880k capacity; this shouldn't be much
of a problem, unless you want to transfer files from a PC using
CrossDOS.

You'll enjoy working with your A4000, but beware, parts are virtually
non-existant, and repairs done by others can get pretty pricey. I have
11 Amigas in my stable so far, all the models except the 4k and the 600.

Gary Hildebrand
St. Joseph, MO


Garo Alexanian wrote:
>
> I found your great web site. Would you please give me some advice? My A4000 with a Cyberscsi I module does not always boot from the floppy or the hard drive (let alone from external hard drives). I'm certain I've got proper end termination and a good cable. When it does not boot from either the hard drive or the floppy it does not even check in with the floppy as it should. I was wondering if you knew the proper voltages on the hard drive power connector. Mine gave 5.0 volt and 11.77 volt. But my A200 give 5.0 and 11.23 (it also boots intermittantly). Also, whether a low density floppy would work in place of the high density it comes with. I have a spare low density in case it is the floppy which is intermittant. THanks for any comments. I bought all these and am having nightmares
Received on Sun Oct 27 2002 - 13:33:00 GMT