From: Nicolas Welte; address is valid for replies (Re:) only! (welte_spam_at_freenet.de)
Date: 2003-02-14 00:10:39
While testing the mechanical compatibilty of my 6502 Flash device with the
1541-II, I tried to mount it in all 1541-II drives I have here.
I found one that I never saw mentioned before:
http://people.freenet.de/x1541/nonamedrive.jpg
Unfortunately it does not have a proper label with a manufacturer or model
name on it, just a serial number label. It also looks very cheap, lots of
plastic were used for it. The only part that lists a manufacturer is the
stepper motor from Japan Servo Co. Did anyone ever see this type of drive?
I also found that there exist two different types of Newtronics D500 mechs in
the 1541-II:
First type, similar to the one in the 1541 and 1551: has a spindle motor
control board based on the LAG570 chip, has a three pin header for the
spindle motor and a four pin header for the WP LED and sensor. The shaft for
the closing lever is shaped like a reverse "D" when closed. Serial number is
S/N 40903250.
Second type: has a spindle motor control board based on the BA6301 chip, has
a combined five pin header for both the spindle motor and the WP sensor (the
WP LED is connected to the spindle motor control PCB). The shaft for the
closing lever is shaped like a reverse "D" when open! Serial number is S/N
80001731. (80 on this drive and 40 on the other is printed in a slightly
different font than the other numbers, making me think this might be a fixed
model number).
I learnt about the differences when I tried to repair a 1551 with broken R/W
head by simply installing a replacement drive (of type 2) that I had from a
1541-II in very bad shape. Of course the lever of the 1551 wouldn't fit...
Nicolas
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