|HP 97 card reader|
Message #1 Posted by Davd F on 21 Nov 2011, 11:07 a.m.
I picked up an "untested" HP97 on Ebay, and have just finished cleaning it up. It had an "old electronics" smell, and was loaded with insect droppings and some insect parts. I disassembled it down to the last screw and thoroughly cleaned it. I am powering it via a 5V supply to the terminals (thanks Dave for including the polarity in your pics on the battery page!)
So far, The calculator works beautifully, and I can advance paper, but have to buy some calc paper to test the printer out. During the cleaning, I repaired the gummy card reader wheel, and removed all the gunk (mixed with bug parts and droppings--ugh.) Now, when I insert a card, there is no response, but when I push the card far enough, I get an ERROR message on the display. I am unfamiliar with the apparatus, but would guess it's either a motor or card sensor problem. I did remove the little foil spring contact on the reader, which I am guessing is the sensor for card progress through the slot. It has four little balls and 5 screws, three of which are accessible with the assembly cover in place. Am I right in guessing that there is a proper process for setting the tension on the foil via those screws, and that I probably messed it up when I disassembled it? Any suggestions on what might be happening?
I have read the prior posts, and understand that sometimes some of the caps on the assembly cause problems. However, I hate to just start replacing parts without knowing for sure what is wrong. I used to have the DVD with all the manuals, but can't find it anywhere. I just ordered a new set, but it looks like I won't have this before the holidays:-( So anything that might point me in the right direction would be most appreciated!
For those celebrating Thanksgiving, have a great holiday!