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#1
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ROCKOLA 468 PLAY PROBLEM
When I select a record, the read out carriage finds it OK but the hammer
does not strike. The gripper motor picks up the record and starts the transfer. Just before it gets to the turntable it blows the circuit breaker. I keep resetting the breaker until it drops the record and it plays OK. It then runs through the rest of the sequence OK. I have bought the manual and checked all the fuses. All the relays have been checked by an electrician. I'm at the point of buying a 10lb hammer and getting rid of some aggression!! Can anyone help please. I'm new to jukeboxes so If its something obvious to you it wont be to me. Thanks. |
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#2
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Charlie will probably be able to give better advice, but it sounds to
me like your readout coil (the coil that activates the hammer that cancels the selected pin) is shorted out. Does it looked burned? Try unsoldering the wire to the coil and then making a selection. If the coil is bad, it won't trip the breaker (nor will it cancel the selection). If it still trips the breaker, start looking at the wiring to the coil. Thomas gary smith wrote: When I select a record, the read out carriage finds it OK but the hammer does not strike. The gripper motor picks up the record and starts the transfer. Just before it gets to the turntable it blows the circuit breaker. I keep resetting the breaker until it drops the record and it plays OK. It then runs through the rest of the sequence OK. I have bought the manual and checked all the fuses. All the relays have been checked by an electrician. I'm at the point of buying a 10lb hammer and getting rid of some aggression!! Can anyone help please. I'm new to jukeboxes so If its something obvious to you it wont be to me. Thanks. |
#3
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Does it have a diode across the coil terminals? If so maybe it is
shorted. I've ran into this on Wurlitzers but I am not familiar with this model. Thomas Teeter wrote: Charlie will probably be able to give better advice, but it sounds to me like your readout coil (the coil that activates the hammer that cancels the selected pin) is shorted out. Does it looked burned? Try unsoldering the wire to the coil and then making a selection. If the coil is bad, it won't trip the breaker (nor will it cancel the selection). If it still trips the breaker, start looking at the wiring to the coil. Thomas gary smith wrote: When I select a record, the read out carriage finds it OK but the hammer does not strike. The gripper motor picks up the record and starts the transfer. Just before it gets to the turntable it blows the circuit breaker. I keep resetting the breaker until it drops the record and it plays OK. It then runs through the rest of the sequence OK. I have bought the manual and checked all the fuses. All the relays have been checked by an electrician. I'm at the point of buying a 10lb hammer and getting rid of some aggression!! Can anyone help please. I'm new to jukeboxes so If its something obvious to you it wont be to me. Thanks. |
#4
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Questions first? I assume it's the mech breaker tripping, there are
three breakers. Does it fail on both top and bottom record sides? If only one, Thonas is correct, likely the coil itself. With a meter they should read between 25-35 ohms. An easy test is to stop the mech while the record is transfering, slip a dolar bill between the wipers and the rings. Turn the mech back on. If the breaker doesn't trip, you have a bad coil. Number one reason for coil going bad is a bad #3 micro switch. Change it!. Could also be a bad contact in the control box, but rare, or wiring problem. The timing described is a little confusing. The coil is energizes by the #2 micro and released by the #3. The #2 is activated as the tone arm travels to the record, which is after the gripper transfers the record to the turntable. Might also have a bad #2 micro. Check alignment and operation of switches, but #3 is def bad. If coils check good, consider a tightness in the gripper mech tha'ts slowing it down enough to trip the breaker. Charlie Maier |
#5
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Questions first? I assume it's the mech breaker tripping, there are
three breakers. Does it fail on both top and bottom record sides? If only one, Thonas is correct, likely the coil itself. With a meter they should read between 25-35 ohms. An easy test is to stop the mech while the record is transfering, slip a dolar bill between the wipers and the rings. Turn the mech back on. If the breaker doesn't trip, you have a bad coil. Number one reason for coil going bad is a bad #3 micro switch. Change it!. Could also be a bad contact in the control box, but rare, or wiring problem. The timing described is a little confusing. The coil is energizes by the #2 micro and released by the #3. The #2 is activated as the tone arm travels to the record, which is after the gripper transfers the record to the turntable. Might also have a bad #2 micro. Check alignment and operation of switches, but #3 is def bad. If coils check good, consider a tightness in the gripper mech tha'ts slowing it down enough to trip the breaker. Charlie Maier |
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