rockola capri 100, magazine motor.

[jukenorman]

After the play control relay power is routed through No. 2 micro switch, interlock relay (next to the reversing relay) and No. 1 micro switch. Yes, the problem muzt be before the motor.

Norman.

[carlos48]

Hi Norman;


Maybe, I,m doing something wrong or missed something... after play control, i have cleaned interlock relay, and checked three switches, and no.1 and no.2 work fine... in number 3 have same measurement in both sides, I mean, look likes is "on position" all time, ( i,m not 100% sure, because of connections)

is this switch no.3 routing the scan circuit?

[jukenorman]

The power for the magazine motor is routed through #2 and #1 micro switch but not #3. When you operate the scan switch, you should be able to see DC voltage (28V) at two of the three connections on these switches provided the switches are good.

Norman.

[carlos48]

Hi Norman, thank you for your cooperation, I appreciate.

I,m finishing the possibilities.


In that case, I guess the switches could be also ok.

Today, Im going to disassemble the control box, to properly clean contacts' interlock relay, due to the access to it is quite difficult.

[carlos48]

Hi Norman, I have checked the control box, and everything seems to work fine also.( reversing relay resistor a little bit low measurement, 200 instead 680, but this device is not envolved in the procedure, is it? )

I,m not electronic technician, I,m amateur, but I think according to n11 page circuit scheme ( not 100% sure) the "home switch" al wobble plate is envolved in the scan procedure for the magazine motor, isnt it?


I don,t have it very clear? could you confirm, please?


.... I,m still investigating... By the way MERRY CHRISTMAS FOR EVERYONE... AND THANKS AGAIN FOR THE OFFERED HELP.

[jukenorman]

Hi Carlos,
In normal operation (when selections are made) the wobble switch and home switch are part of the magazine motor circuit but they are overridden when the scan switch is operated. To go back, when you operate the scan switch, is the play control relay pulling in OK?

Norman.

[carlos48]

I understand now...


...When I operate the scan switch the control relay wont pull in, I mean, I noticed there are four relay connections in that relay... They all four, are in "down" position and they wont come up or pull in... "they wont move at all", yesterday what I did, was checked all the control relay components and clean the contacts properly in order to make good contacts.

The motor still receiving 3,5 volts when operating scan switch... but thats all, I have read something about armature motor, but i dont have that clear either... I still investigating.

Thanks again for clearing up my question and informing the steps to follow

[jukenorman]

Hi Carlos,
When you operate the scan switch, the play control relay should operate and move the contacts. One of these contacts - the Y contact shown on the schematic - routes power to the magazine motor via a series of switches and relay contacts. If the play control relay does not operate when you operate the scan switch, then we are falling at the first hurdle and that needs to be resolved.

Possibilities
1 The scan switch is faulty.
2 The play control relay is faulty (coil open circuit?).
3 The -28VDC is failing when load is applied.
4 There is a bad connection on one of the above items.

All your concentration has to be on the play control relay, it must pull in when the scan switch is operated.

Best of luck, Norman.

[carlos48]

Thank you Norman for the help, I know theres nothing much more to inform, by your side, and you did it as much as you can.. Now I will inform the steps I,m following, just if you feel to give some tip, I,m not electronic technician, only amateur learner, but I do I best as I can also... I dont give up...

From the socket to the power supply comes 35 vcc volts, they arrive to shocket of distributor box, and goes directly to back of the control box, at that point, ( before energizing the control box)

the power cames down to 3.5 vcc volts, so according with you information, for any reason I think the option n3 could be a possibility "35vcc is failing when apliying the load for any reason...

I have read the selenium rectifier has a short life working, and it,s not very reliable, maybe the voltage falls down when the circuit is closed because of it, I,m not sure, but I,ll make some

checkings and ill try to get more info through google also before give another step... changing it for a bridge rectifier if i dont find more options

I know is not easy inform without having the machine in front of you, but your help is been absolutely useful

[carlos48]

Some steps I followed;

Only from power supply comes 35 volts dc, after that theres no power current, micro switch n2 wont get power current

Could be a ground or earth  chassis problem?

Micros tested and work fine.
Scan Switch tested and work fine.


"After the play control relay power is routed through No. 2 micro switch, interlock relay (next to the reversing relay) and No. 1 micro switch. Yes, the problem muzt b"

[jukenorman]

Hi Carlos,
I think we are at the stage where it's getting difficult to guide you further as things stand. I'm not actually convinced that the selenium bridge rectifier is good, the fact that the picture you posted of the rectifier clearly shows damage has to be a bit of a concern. Have you got something like two 12V light bulbs you could connect in series to load the power supply in isolation (no jukebox circuits connected) to check whether the DC voltage holds up?

Norman.

[carlos48]

Hi Norman;

I have better news now.

The fact is, after operating the socket at distribution box for measuring at that point, the magazine motor started to rotate. That could mean a bad connection on the socket, "in fact very subtle issue" due to machine is not in very good condition.

Your help has been invaluable andI can get a jukebox lesson myself now;

- be always patient.
- do not underrated any part of the circuit.
- it could be sometimes easier than it seems...

In the other hand I have made a good review of the circuit.


I going to procedure with restoration now... cleaning and oil some more parts and make a mech review, before operating the complete cycle to avoid any damage due to machine is in a quite a bad condition...

I can attache more pics if you like...

[jukenorman]

Hi Carlos,
I am very pleased to see that you have made a breakthrough! I hope that you will keep us informed of how you are progressing.

Norman.

[carlos48]

Its very slow and patient job... I,ll put some pics when I made more improvements

Thank you Norman, and users who make "work this forum", at Ron Rich's Memory whom I met here and his value was  essential for the forum also.