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HP 41 Card reader problem
02-05-2017, 08:53 PM
Post: #2
RE: HP 41 Card reader problem
Software or hardware?

Software:

Easiest to fix but tedious. Try a memory rest of calculator. Then try card reader.

Hardware:

Calculator: When inserting card reader entire shell can flex. With weak screw posts or loose screws the module/battery block connection and to a lesser extent the keyboard PCA connection may become intermittent causing erroneous displays or no display. Lots written up on screw posts in the archives.

Card reader: I take it this reader has a new pinch roller (o-ring or flex tubing). May be a connection on the plug or dirt. Clean contacts on both the male (calculator) and female (card reader module.

This is like a doctor diagnosing over the phone, very iffy at best. Try the above one at a time, starting with machine reset, cleaning modules, checking screw post integrity, cleaning module/battery block contact, PCA contact and keyboard contacts and if good then tightening screws (gently).

Geoff
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Messages In This Thread
HP 41 Card reader problem - Cancuino - 02-05-2017, 08:15 PM
RE: HP 41 Card reader problem - Geoff Quickfall - 02-05-2017 08:53 PM
RE: HP 41 Card reader problem - Cancuino - 02-06-2017, 11:21 AM
RE: HP 41 Card reader problem - Cancuino - 02-05-2017, 09:08 PM
RE: HP 41 Card reader problem - Hans-Peter - 02-05-2017, 09:13 PM
RE: HP 41 Card reader problem - Cancuino - 02-05-2017, 09:54 PM
RE: HP 41 Card reader problem - Cancuino - 02-06-2017, 01:08 AM
RE: HP 41 Card reader problem - rprosperi - 02-06-2017, 01:51 AM
RE: HP 41 Card reader problem - AndiGer - 02-06-2017, 05:00 AM
RE: HP 41 Card reader problem - Cancuino - 02-06-2017, 08:43 AM
RE: HP 41 Card reader problem - Cancuino - 02-18-2017, 11:12 PM
RE: HP 41 Card reader problem - damaltor - 02-20-2017, 11:12 AM
RE: HP 41 Card reader problem - Cancuino - 02-20-2017, 10:33 PM
RE: HP 41 Card reader problem - Cancuino - 02-26-2017, 06:33 PM



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