There is a "service switch" (bypass) that is mounted in the upper left corner (inside) of the title board (lid). It is designed to be moved in the run position when the lid is closed. If yours is still there it may be causing trouble since you moved it. This switch is often removed and covered in a ball of electrical tape and is laying in the bottom of the machine. The operators did this because the switch would frequently fail.
Troubleshooting Proceedure for this problem
1) Power off
the jukebox.
2) Check the black RCA cable that plugs into the DCC (digital control center) this is labeled "Tormat" Just unplug it and plug it back in. There might be 2 more RCA connectors on the side of the mechanism control box (several black switches) Just unplug them and plug them back in. Make sure they ALL make really good connection and are tight. This cable carries the selection signal to the boxes.
3) Unplug the black and gray boxes. Examine these plugs for damage or corrosion and plug them back in again. Make sure that you check the little wire with the bullet plug located between the two plugs for the gray box.
4) After everything is back in place,
power on the jukebox and see if it selects. If no result (continue)
5) On the side edge of the DCC there is a plastic cover that has test points under it. These voltages will need to be checked with a volt meter. With the power ON, touch the BLACK meter lead to the chassis (metal) and touch the RED lead to each of the screws ONE AT A TIME, be careful not to touch 2 or more of them together. Main concern is +27v, -27v, & 13v . Voltages can be + or - 2 volts.
If voltages are missing the power supply board in the DCC needs to be looked at.
If you are within 100 miles of Lancaster PA and would like a reasonably priced service call, Please call me (Ed Gardner) at (717) 333-6933
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