[Jukebox-list] Rockola 1438 Blown 1.6 Fuse

[Jay Hennigan]

Britt Abbott wrote:
> Well my Rockola 1438 stopped after putting a record back in the magazine. I suspect one of the motors, magazine or gripper motor is pulling to many amps. Sure enough when I checked the 1.6 Amp Slo-Blo for these mech motors,the fuse was blown. I had replaced the old original selenium rectifier with a new silicon bridge rectifier and relocated the 1.6 Amp fuse in between the transformer and the rectifier.
> I have a couple of old replacement motors I can try. Is there anything tricky or is replacing the motors straightforward, ie. just a matter of disconnecting and putting another one in it's place? Can these motors be rebuilt? What component(s) typically fail in the motors?

Brushes in the motors can fail, and are relatively easily replaced. 
They are gearmotors.  The gearbox is packed with grease which may be 
hardened.  Could also be a buildup of crud in the commutator.

However, I would suspect the gripper arm mechanism first.  If you 
haven't gone through it, it is almost certainly gummed up and will put 
quite a strain on the motor, causing it to draw excessive current.  To 
do this right requires taking them apart, clean and re-lube.

Was the blown fuse just melted and pulled apart by the spring or is 
there blackened material on the inside of the class?  If melted and 
pulled apart it is an overload (like a stalled motor).  If blackened 
stuff deposited on the glass, a short (like a bad rectifier).

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Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
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