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patscc
January 19th, 2009, 07:59 PM
I'm having troubles with an XT drive. I was hoping some could point me in the direction of a schematic for the bugger.
Images are label, top of drive board, bottom of drive board.

Thanks !

patscc

http://i464.photobucket.com/albums/rr2/patscc/Label.png
http://i464.photobucket.com/albums/rr2/patscc/PCB_Top.png
http://i464.photobucket.com/albums/rr2/patscc/PCB_Bot.jpg

channelmaniac
January 19th, 2009, 09:06 PM
Is this the only floppy drive on the cable? If so, that empty socket you see on the board should have a resistor pack in it.

The drive at the end of the cable should have it, the one in the middle of the cable should not.

RJ

patscc
January 20th, 2009, 06:11 AM
channelmaniac said...Is this the only floppy drive on the cable? If so, that empty socket you see on the board should have a resistor pack in it.
The drive at the end of the cable should have it, the one in the middle of the cable should not.
Thanks for the tip. The issue is a bit more complex than that(i.e. not related to termination or drive selection), that's why I was hoping someone could steer me in the direction of a schematic.
patscc

Chuck(G)
January 20th, 2009, 08:57 AM
Thanks for the tip. The issue is a bit more complex than that(i.e. not related to termination or drive selection), that's why I was hoping someone could steer me in the direction of a schematic.
patscc

I might have one--have you checked the O&A?

Chuck(G)
January 20th, 2009, 03:28 PM
I think I've got the one. Is U20 a 3470 and is U8 the drive select/MUX jumper block? I can't really make out much from your photo other than the 1W 300 ohm resistors (R66 and R67 perchance?).

patscc
January 21st, 2009, 05:17 AM
Chuck(G) said...have you checked the O&A?
Still don't have one, unfortunately.

Chuck(G) also said...Is U20 a 3470
Unfortunately they weren't kind enough to number the parts. In the bottom left quadrant of the PCB top picture, there's a 3470 to the right of two TO-5 cans, and above two maroon foil caps.

This would make a great gameshow.

patscc

Chuck(G)
January 21st, 2009, 09:42 AM
I'll scan them anyway and PM you. These things are a pain in the neck to read, as they use the CDC conventions. Good luck.