Hi,
I'm looking for a copy of the repair/maintenance manual, or at least the circuit diagrams, for the Tektronix 475A/DM44 scope.
The trigger for channel A does not work; the corresponding LED (or is that a lamp?) does not light up as it should. I can only obtain a stable display if _all_ the four buttons of the HORIZ DISPLAY kerys (to the right of the CRT) are out & I use the "B" trigger button to adjust ... ?!
Any idea what might be wrong here (better yet: how to fix it ?)
Please feel free to contact me either via the newsgroup, or per direct mail.
Thanks in advance for any help, and greetings from Lausanne!
- Joerg
[ xpost to s.e.equipment & s.e.repair, f'up to s.e.e. ]