To the help desk,
I bought a 67 with a gummy wheel card reader. I replaced the gummy wheel with fuel tubing off the same section of which I repaired two 97's. The 97's worked perfectly with over 50 cards without error but the 67 does not work well at all. The problem is even with the cam adjusted to max grip the card is slipping. Its not the clutch. On the 97's the cam was adjusted about 1/2 way and with the calc off its firm to insert a card, with the 67 its quite soft and the card can be pushed in easily.
Any Ideas - it seems like the 67 reader is a different beast.
Second problem is the "A" and "B" and "E" keys only work when you push the key towards the top left of the calc.
Is this a cold solder joint or just a clean?
When measuring continuity with a digital volt meter is there any danger with the cmos circuitry or is this a no no.
(I haven't tried measuring as yet)
Any help appreciated.
Thanks Malcolm