Hi
I have an ASR33 that is similar. I've just not had time
to tinker with it.
When I got it=2C it seemed to be missing the power board
for the reader. I finally made one with a piece of
vector board.
I had the machine and stand shipped in two packages.
I'd not opened the stand because I had't finished
fiddling with the unit.
I needed to make a little more space and guess
what I found in the box for the stand. you guessed
it=2C the supply board for the tape reader.
That's probably becuase in the standard configuration, the reader power
supply is mounted in the stand, not in the main unit.
Be warned that the reader power supply does not contain a transformer.
The reader solenoid, and the trip contacts at the rear right of the
typing unit are thus 'hot'.
-tony