Hello Thank you for this detailed procedure. I have used the technique of cutting pins off a chip and soldering a DIL holder onto the stubs but with only one or two chips. Suspect I will need to check that the increased height does not interfere with the other board when they fit together. I have a ...

Hello I have identified that it is the smaller board that is faulty - the one which is mainly populated with 4000 series chips. There are no visible faults. Could you please advise a procedure from identifying faulty components - or - is a case of trial and error. Are you aware of any particular chi...

Hello

Thanks I'll do this swap and let you know the result. Of the four LED's that are mounted vertically the top one is green (not on) - it is the second LED from the top that is on when the machine is powered up. Yes I do have a compressor!

Regards

Tim

Hello Thank you for the replies - all are very helpful. The boards I have are the same as that shown in the photograph. The label shows: Prod. No. CD20 Mfg. no. 1245-029 Serial no. R3-957P/47 The Tested label shows 4.4.84 so I assume that this board has been repaired previously. I have separated the...

Hello Everything on my 1983 ORAC lathe, rescued from a skip, works except the X axis CD 20 driver board which has the first red LED down from the top on. I've swapped the X and Z boards and this gets the X axis working but the fault is then on the Z axis. I've checked for dry joints etc. but not man...

Has anyone got a spare Digiplan CD20 driver board for my 1983 ORAC lathe? I would like to keep it in its original condition.
Hope someone can help.

Regards

Tim Lewis