Eeyore wrote:

robb wrote:


hello,

i am trying to repair a fault with an user interface circuit (UIC) board and
control board out of an old 1987's computerized programmable Pfaff sewing
machine (made in Western Germany).

a for fun project for me , a challenge

programming consists of storing values in memory locations using keys ( +/-
buttons) on UIC board

PROBLEM : a group of 3 (+/-) *momentary switch* buttons on UIC board used
to change memory values do not make any changes when pressed.


They're probably worn out.

Graham

THat's just like you Mr. Ham. Open up before you read the rest of his
post! or did you do that intentionally? He stated that these 3 buttons
were tested via an ohm meter and appear to be working.


--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5