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Post by prime on Aug 18, 2022 13:04:58 GMT
This morning i selected a song, carriage retuned last record, scanned to the right and just stopped. I tried the service scan, no movement. Seems like a power issue but i dont have a trouble shoot for this model. I checked fuses all are good except there is one fuse with a red top that seems tight. I am not sure if it screws out like the others but i dont want to break it, if someone has removed one of these please give me info on this. thanks pete PS fuses are fine, 5U4G tube fine, it never made it to the reversing paddel so that switch is not the issue, when i toggle the scan switch the play switch moves, All switches have been cleaned most with Deoxit 5 and thick card paper, some with also burnisher. all connections seem tight. I canceled all pins on bank, tried selector again it moves pin but carriage does not move. Light on at carriage and if i use the coupler motor turns easily and carriage moves. Any help troubleshooting greatly appreciated. pete
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Post by prime on Aug 18, 2022 14:36:40 GMT
I have 29 vlts at #2 prong on the 11 prong cable and 29vlts at the #2 prong on the 5 prong cable that goes to the services switch, with service switch engaged i have 0 vlts at the C contact. Should i not have voltage at that switch or any cam switch/
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Post by jukenorman on Aug 18, 2022 14:39:01 GMT
Have you tried toggling the reversing switch to see if the carriage moves in the opposite direction? The diagram for how power is delivered to the main motor is in the manual, there probably isn't a huge amount a trouble shooting guide is going to add.
Norman.
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Post by prime on Aug 18, 2022 14:59:56 GMT
Yes i have tried switch back and fourth but i also get no readings from any of the reversing switches. I checked for continuity between pin 2 of the 11 prong plug and the SC switch, wire is good, if unplug the 11 prong and test # 2 hole i get 29vlts so i figure i should get 29 at the sc switch but i get o...In the manual it shows the power going directly from the #2 to the sc switch.. Im thinking grounding issue or the power supply drawing is missing something pete
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Post by prime on Aug 18, 2022 15:13:11 GMT
Hi Norman, does the play control engage at start up and stay engaged? just wondering
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Post by jukenorman on Aug 18, 2022 16:40:30 GMT
The play control relay operates when it is required to move the mechanism, either by the scan switch or by making a selection. It switches 120VAC to the reversing switch which routes it to both motor windings - depending on the direction desired. See page 1145 of the manual for the diagram, note that there is a fuse between the play control relay contact and the reversing switch.
Norman.
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Post by prime on Aug 18, 2022 18:20:10 GMT
I had checked the fuses but F2 from a distance looked like the push and turn or just screw using the outer edge I tried to move it but it wouldn't budge, i just had a very close look and it needs a standard screw driver to remove. It has allot of black on it and seems to have and loose continuity just by moving. will pick up a few 3amp and hope thats it. thanks pete
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Post by jukenorman on Aug 18, 2022 19:07:52 GMT
Hi Pete,
What do you think Ron would have said at this point? I referred you to a drawing; that drawing indicates the fuse is F2. If you flick through the manual to the WSR section, you fill see the exact location of F2. And with the play control relay energised, you should be seeing 120VAC at F2.
Norman.
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Post by prime on Aug 18, 2022 19:08:50 GMT
Replaced the 3 amp F2 fuse, still no power to motor, i do get 29 vlts going to reverse switch when i turn on unit, after a minute or so 0. Also i engage the play solenoid when using the scan toggle. I do not get voltage at the c switch. On my j unit i get voltage at the c in play mode, unfortunetly the 100c does not have a play mode just on and off and scan toggle. pete
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Post by prime on Aug 18, 2022 20:11:05 GMT
As far as Ron, he would say RTFM and like always he would be right, i have followed the manual and still cant find why i have no power at motor. I have 120 vlt at play switch, i have 120 vlt at F2 fuse so up to there i am fine, I will recheck voltage at #2 pin that goes to C switch and confirm voltage. pete
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Post by jukenorman on Aug 18, 2022 20:37:10 GMT
Back to the schematic - next after F2 is the reversing switch. Remember there are two motor windings so there is a link to a second reversing switch section for the second winding. The AC return is also switched by the reversing switch. And finally there is a section of the motor run capacitor that's switched into circuit in scan to increase the motor torque.
Norman.
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Post by prime on Aug 18, 2022 21:06:47 GMT
Hi Norman as always i am great full for your help. I found the issue, it may take a little to confirm no issue with other parts. I followed the power from main to reverse switch, noticed issues after that. Over many years the wires going to the motor run under the frame at the end of the carriage, due to this when the carriage goes all the way to the right, the wires have been rubbing on the rail. You cant see it from above but they are bare. whoever had this last removed the motor and installed the wires improperly, i never noticed. The wires shorted out and blew a fuse, also fried some smaller wires. I found this by following the feed as you and Ron has mentioned. I will still be checking every wire in the area before reusing the box. And rerouting motor wires properly pete
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