another pin problem

its an ami ti2 and it jumps the pins on the search unit the thing is now and again it will stop for a second or so the transfare motor starts then it will jump the pin just crn't put my finger on it switches click as they should do ect ect any help would be great thanks"derek"

Derek,
"Clicking" (Micro) switches mean nothing ! To check them you must use an "Analog" meter of good quality (with the power off, an the switch dis-connected), on the "Rx1" setting. Ron Rich

thanks ron i will get out my old avo

Hello Derek,

Have you checked that the pin is fully out when the stop plate jumps over the pin? I have seen it when a pin that is slightly seized only pushes out about halfway out and the stop plate jumps over it.
I would also check the soldered connections on the stop plate where thee micro switches are soldered to the slip rings.
The annuciator if wired incorrectly can cause a similar fault also can the diodes such as D2, D4 and D5 (note these diodes are connected to a circuit board on the R-74 and R-80 behind the molex plug, on mechanism's on earlier models they are connected to tag strips behind the molex plug).

Please let us know how you get on.

Regards
Alan Hood
ami-man
UK

just had another quick look changed relay 1 /search unit /& stop switch assembly with some i know is working no difference' still jumps pins i have noticed
that when the magazine scans now and again the 30 volt trip trips out. not got to the diodes just yet but they look a right prat to get out