[GreenKeys] ASR-33 problem

[Charles]

My ASR-33 has an interesting problem. Sometimes it does not "print" a
carriage return, but echoes a dash ("-"). Same for a line feed which
echoes as "*".

The tape punch, however, shows the correct code, so it's not a
distributor problem. Punching a tape with repeated CR's, which I can
see has the proper code, also sometimes returns the carriage several
times in a row, but then will print a dash.

So the problem is somewhere between the codebars and the typewheel,
and looks like a single bit sticking high (mark). Any hints?

thanks
Charles