On Tue, May 19, 2020 at 6:47 PM Jeffrey Golas via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
Bill, let me know how you make out but it looks like Duane gave you the info on the Fanuc model.
Duane I saw one of those cases on ebay and thought it was cool! If you have notes/info on the 2702 please pass them along, as its likely the same as the 2701.
On the 2701, one side of the ribbon connector is almost completely ground, on the other side pins 1-5 appear to be control (possibly outputs like strobe), the next 8 pins are bits, the next 3 may be Fwd/reverse control, one after that is ground and not sure about the last 3-4. This is a 40 pin connector.
Mine has a seperate screw terminal on the opposite side for power, although it may take 3 voltages, not sure. Motor is 12v but judging by the MASSIVE ceramic resistor it may be set up for 24v.
Jeff
Jeff, I have everything I need now to get started but I still need to look up how to power the reader hardware definitively. I see where the +5V power input goes. The two power input leads labeled "100B" and"100A". Here is a pic of the board I need to power: https://www.ebay.com/itm/GE-FANUC-Tape-Recorder-Board-A20B-0004-0280-Used-20... Who here specifically has worked with the FANUC A20B-0004 reader or something FANUc from the early 80's? This FANUC 6 manual, which includes this model of tape reader as part of a larger system, references the part numbers found on the reader http://cncmanual.com/download/1646/
From the manual (starting from page 320 or so) it looks like inputs 100A and 100B are both/shared (?) 24V inbound, and the 24V DC is brought down to 18V (?). 1Amp.
I will document the process onto vintagecomputer.net once I have some progress reading tapes. I am thinking I should attach a 24VDC and 5V DC to the board. Bill