13 Oct
2016
13 Oct
'16
10:17 p.m.
Tony's suggestion is the best at this point - look for issues with the
motor start and/or run caps. A shorted (or open..) cap can certainly cause
this issue. Shorted and it draws excess current in the cap, open and it may
prevent motor starting / running which likewise draws excess (stall)
current, but in the motor windings.
Also, it shouldn't be too hard to isolate the motor assy. itself from the
rest of the circuit - lift the correct lead(s) from the AC power
distribution system. It may be much easier if you can deal with the motor /
cap assy. as a single entity, rather than within the rest of the complexity.
This is just generic advice from a guy who's never fixed a 33. But assuming
yours has the standard AC synchronous motor, it should all apply. Motors
only draw excess current for a very few reasons - overload / stall, shorted
windings, bad start / run caps and possibly associated start / run relays.
On Thu, Oct 13, 2016 at 11:34 PM, tony duell <ard at p850ug1.demon.co.uk>
wrote:
The buzzing definitely seems to be coming from
the motor. I put a
plastic
tool to the casing and could feel it vibrating.
However, I can turn it by
hand (clockwise) and see all the gears and striker mechanisms working.
Should the motor be running in the 'Off' positon of the switch, though?
If the motor is buzzing and taking a high current (which blows the fuse),
what about the motor run capacitor (the one on the mechanism chassis
itself, wired to the motor)? Maybe it has failed.
-tony