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TECH: Rock-Ola 1438 Selection Problem



 
 
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  #1  
Old March 9th 04, 11:58 PM
Hassell Castle
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Default TECH: Rock-Ola 1438 Selection Problem

Hi all,

Having a problem with a Rock-Ola 1438 I recently picked up.

Problem:
I make a selection and the selector pin moves to the "selected"
position on the pin bank. Record Carriage rotates around looking for
"selected" pin, however as the Selection Assembly moves along the Pin
Bank, it goes right past the pin that has been "selected", NOT
stopping and picking up the record. I've verified while looking
closely at the underside of the Selection Assembly while it rolls over
the "selected" pin that it does make good contact with the Selection
Assembly...however nothing. Record Carriage continues to go back and
forth looking for selection. Not until I manually put the "selected"
pin back into the "unselected" position will the carousel stop
rotating.

From what I can understand in the manual. It looks to me like this
might have something to do with the Interlock "Trip" relay not
engaging. However...why won't it engage?

I've noticed that while the Record Assembly is rotating around
searching for a selection, if I manually trip the Interlock "trip"
relay the carousel will immediately stop where ever it is and the
Gripper Motor Assembly will go about placing a record onto the
turntable and play the record. Once played back to the record carriage
it goes.

Any suggestions on why the Interlock "trip" Relay is not engaging?
This seems to be where my problem lays.

Thanks,
Craig Hassell

P.S. All fuses checked good with multimeter.
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  #2  
Old March 10th 04, 06:43 AM
Hassell Castle
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Posts: n/a
Default

Problem solved.

Luckily to my advantage my parents still own the beautiful Rock-Ola
1455 I sold them a little while back and I was able to compare the
machines and look for differences.

Bingo problem found. Looks as if the Selection Assemblies wiring that
comes from the Reverse Record Carousel switch stacks on the far left
of the jukebox had somehow gotten pinched and broke clean off the
switch stacks. It was hard to find this problem as the wires made a
clean break and had gotten caught under the mech assembly and were
almost impossible to see...but there they were. 5 wires had come loose
(black, green, red, orange and white insulated wires). Made some
extensions for these wires with some new 18 gauge wire soldered them
to the existing wires, heat shrink tubed them to help secure them and
then resolder the new wire leads to the existing switch stacks.

Juke is back to life and playing records for the most part. Just need
to do some basic clean up and some minor cosmetic work and this juke
will be in tip top shape.

Craig

oOn 9 Mar 2004 14:58:45 -0800, (Hassell
Castle) wrote:

Hi all,

Having a problem with a Rock-Ola 1438 I recently picked up.

Problem:
I make a selection and the selector pin moves to the "selected"
position on the pin bank. Record Carriage rotates around looking for
"selected" pin, however as the Selection Assembly moves along the Pin
Bank, it goes right past the pin that has been "selected", NOT
stopping and picking up the record. I've verified while looking
closely at the underside of the Selection Assembly while it rolls over
the "selected" pin that it does make good contact with the Selection
Assembly...however nothing. Record Carriage continues to go back and
forth looking for selection. Not until I manually put the "selected"
pin back into the "unselected" position will the carousel stop
rotating.

From what I can understand in the manual. It looks to me like this
might have something to do with the Interlock "Trip" relay not
engaging. However...why won't it engage?

I've noticed that while the Record Assembly is rotating around
searching for a selection, if I manually trip the Interlock "trip"
relay the carousel will immediately stop where ever it is and the
Gripper Motor Assembly will go about placing a record onto the
turntable and play the record. Once played back to the record carriage
it goes.

Any suggestions on why the Interlock "trip" Relay is not engaging?
This seems to be where my problem lays.

Thanks,
Craig Hassell

P.S. All fuses checked good with multimeter.


 




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