23 Jan
2004
23 Jan
'04
10:10 p.m.
> Sorry, I mean Tx on the computer. The 20V
appears on the + side of the
loop
> going to the TTY's printer, whenever the
printer is actually printing.
The
computer
doesn't like it much, either :-).
I guess I'd start by unplugging the 9 pin connector on the selector
magnet driver bracket. If you still get 20V on the loop, then there's a
short somewhere in the wiring on the call control unit (probably on the
relay). If not, then there's a problem in the selector magnet driver.
There aren't that many components in there, so it can't be too hard to
test the lot!