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- Apr 16, 2012
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I've been working on an AMI G80 Series juke box. It was blowing the Mechanism Fuse (8 tenths of an amp, slow blow).
I pulled the Junction box and no surprise, it still had the Selenium Rectifier it it. I replaced that with a full wave bridge since it had two wires in and two wires out.
When I went to reinstall it, I thought it was time to pull the "wing" screws and remove the record changer. I removed all the records, and then found I had to pull the panel under the record changer to unplug the 16 plugs below there, along with getting the power wire out and the speaker wire.
When I went to remove the power wire, the insulation disintegrated so that may have been part of the problem. I pulled all that apart and replaced the cord. Then I looked up and saw the power wire to the fluorescent fixture was cracked, so I noted I have to replace that one. Finally, the amp had the same problem, although double insulated wires, so I have that in my shop to desolder and resolder in a new power cord.
From the Figure 7 Wiring Diagram, Phonograph Junction Box (Page 14 of the manual), the Mechanism Fuse goes to Pin 3 of the 5 pin connector.
Chasing that to Figure 10, Schematic Diagram, Selection, Credit, Junction Box and Mechanism Circuits, that appears to go to Pin 3 which goes through the DC switch, then the Record Counter Coil, the transfer motor, the carriage switches and associated reset solenoids and selection relay solenoid, the carriage motor and the Reversing Relay.
Which means my list of things to meter out for grounds are:
I pulled the Junction box and no surprise, it still had the Selenium Rectifier it it. I replaced that with a full wave bridge since it had two wires in and two wires out.
When I went to reinstall it, I thought it was time to pull the "wing" screws and remove the record changer. I removed all the records, and then found I had to pull the panel under the record changer to unplug the 16 plugs below there, along with getting the power wire out and the speaker wire.
When I went to remove the power wire, the insulation disintegrated so that may have been part of the problem. I pulled all that apart and replaced the cord. Then I looked up and saw the power wire to the fluorescent fixture was cracked, so I noted I have to replace that one. Finally, the amp had the same problem, although double insulated wires, so I have that in my shop to desolder and resolder in a new power cord.
From the Figure 7 Wiring Diagram, Phonograph Junction Box (Page 14 of the manual), the Mechanism Fuse goes to Pin 3 of the 5 pin connector.
Chasing that to Figure 10, Schematic Diagram, Selection, Credit, Junction Box and Mechanism Circuits, that appears to go to Pin 3 which goes through the DC switch, then the Record Counter Coil, the transfer motor, the carriage switches and associated reset solenoids and selection relay solenoid, the carriage motor and the Reversing Relay.
Which means my list of things to meter out for grounds are:
- Record Counter Coil
- Transfer motor
- Carriage switches (2)
- Carriage Switch reset solenoids (2)
- Selection relay solenoid
- Carriage motor
- Reversing Relay
