Rock-Ola 429

[TCW]

A Rock-Ola Starlet 429 came with a burned and shorted armature in the magazine motor and an amp with all the tubes in "Poor" condition and one tube with no vacuum.



I replaced the motor (w/used) and it checked out by using the scan switch.

I went through the amp replacing caps, some resistors and all the tubes.


Back Together: With the switch in the run or operate position, the plater runs continually now but no magazine motor.


I checked the Fuses in the Power Distribution Assembly which are good. I checked the Fuse at the Write-in Unit Assembly which was also OK.


I can select a record though. After selecting record A1, it goes through Sequence 5. Write-in is complete and Lock bar Switches A-1 are released and then nothing.

[jukenorman]

Hi Tom,
If the turntable is operating, then it would be safe to assume that the play control relay is made and -28VDC is present. So you would be looking at the circuit (shown bold) in sequence 10 on manual page 46 through #2 micro, interlock release contact and #1 micro. Not forgetting the contact on the play control relay or the motor itself.

Norman.

[TCW]

So I ran the gripper motor by hand through a complete cycle and the magazine motor went to the home position and the turn table shut off.

I then selected A1 and the write-in carriage wrote correctly. The read-out carriage then found A1 and stopped. That is all it does. No gripper motor and no reset of selection lever. The turn table just spins.

Tom

[jukenorman]

Hi Tom,
That would be you at sequence 5, page 41. Maybe dirty reverse relay contact or the gripper motor requires servicing; have you seen it run? The selection lever doesn't reset until sequence 7 so too early for that!

Norman.

[TCW]

I found an open wire on the brush holder of the gripper motor.................. it did work earlier this week too. The wire cam free from the brush holder.

[TCW]

Having a runability issue and the shaft of the turntable motor is not centered in the hole of the turntable bracket. I believe the turntable motor is mounted in the wrong position on the turntable bracket assembly. I can't seem to find a photo or drawing that helps. On the motor, Two screw holes are at the corner of the hexagon and the third is centered between two corners.

Thanks- Tom

[TCW]

I think I got it, The wire from the motor extends towards the two screws on the turntable mounting bracket.