nyjb
Junior Member
Posts: 54 
|
Post by nyjb on Apr 10, 2019 23:17:38 GMT
I have a Rock-ola 474 that developed a problem during testing.
I had manually moved the pins to the selected position and wanted to make sure all selections were being picked up. When each record plated, I rejected it. For the first time that I noticed, it was skipping over some of the selections. There didn't seem to be a pattern; it happened on A & B sides.
I let it continue to see if it would stop for the passed-over selections, and soon thereafter it stopped picking up any selections at all. It makes a little pop sound through the speakers when the read-out assembly goes over a selected pin.
FWIW, I had adjusted the read-out carriage to properly center the carousel shortly before the problem emerged. Not sure how that would cause this. Also, until this go-round, I had made all selections through the selection buttons, and let each record play through instead of rejecting it.
Any ideas?
|
|
|
|
Post by Hildegard on Apr 16, 2019 20:47:39 GMT
Hello nyjb,
Not sure if my thoughts will be helpful.
I'd say you should recall the adjustment procedure you did. Did you make it like it is described in the manual?
If I understand right, though the selection pin is activated (manually), no selection gets found.
Check as well the adjustment of the write-in assembly. I wonder if the wipers are set wrong, bend or so by accident.
Check your manual on pages 65, 66 etc.
The copper slideways (not sure if that is the right translation) should be clean too, not dirty or so.
The service manual offers as well the sequences of operaion to understand what happens electrically. Those might help too to find the fault.
I am not sure if it is right that a "pop sound" can be heard when a selected pin gets passed. Maybe somebody else knows.
Hildegard
|
|
|
|
Post by computronic2040 on Jul 30, 2021 16:18:42 GMT
|
|
|
|
Post by Ron Rich on Jul 30, 2021 18:18:08 GMT
This makes no sense to me-- got a new question, ask it, in a new post in the correct category -- Ron Rich
|
|
