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Post by Ron Rich on Mar 7, 2022 19:45:05 GMT
Hi Cedric,
Be sure the contacts are biased correctly-- the top blade contact MUST, push down and move the bottom blade about 15 thousands of an inch. Ron Rich
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Post by cedric on Mar 8, 2022 1:43:06 GMT
Hi Ron,
Yes, I'll check it. I'll let you know.
Thanks Ron.
Cedric.
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Post by cedric on Mar 8, 2022 15:09:11 GMT
Hi Ron,
Well, I've check all contact. Straighten some, retest again and again. They work well.
But, evidently, it doesn't work. Here's what's going on:
I turn on the juke for the first time of the day. I make a selection with wallbox. I can clearly hear stepper working.
I try to make another selection with wallbox, OR, I push directly on the number step magnet. Nothing is happening.
I turn off the juke for 2 hours.
I try again. It works, but one time only.
It's like if something can be energizing only one time for few hours...
I've try 3 differents 2D21. Nothing change.
What can I test ?
Thanks in advance.
Cedric.
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Post by Ron Rich on Mar 8, 2022 15:17:11 GMT
Hi Cedric, When you can make a selection--do you get the correct, or nearly the correct selection ? Look carefully at the step-up wheels (ratchet & shaft)-- Are both wheels returning to their "home" position after the selection is made-- sounds as if one or more is not-for awhile ?? Ron Rich P.S. I have seen cases where the reset magnet armature is magnetized and stays down --causing this problem-- check that it is not the problem !
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Post by cedric on Mar 8, 2022 15:52:39 GMT
Hi Ron,
In fact, cart never move, even if I can hear stepper working (I left this other prob to attack it after the 1st (information: if I press on the timing relay 2, cart makes his 2 round trips ))
Both wheels return to their home perfectly. I've try them 20 times minimum.
Reste magnet armature is free.
As I say in french: C'est difficile...
Thanks Ron.
Cedric.
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Post by Ron Rich on Mar 8, 2022 16:49:11 GMT
Hi Cedric,
Send me a video of it trying to work--maybe I can see something ? With audio !!
Ron Rich
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Post by jukenorman on Mar 9, 2022 13:20:40 GMT
Hi Cedric,
If I understand you correctly, the letter and number steppers are advancing OK but you are making no selection and the carriage doesn't start. A lot happens in a very short time after the final (number) pulse - TR1 and TR2 both drop out on time delays to make the selection and start the carriage and all that happens before the reset magnet drops out on its time delay to reset the steppers.
Maybe the reset magnet is dropping out too early - are R36 (18ohms) and C24 (300uF) both good? These components enable the time delay for the reset magnet.
Norman.
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Post by cedric on Mar 9, 2022 16:35:22 GMT
Hi Normand,
Thanks for your help too. I disassembled the tsr and brought it to a friend who knows a lot more than me (Ron, I don't have yet the video)
In fact, if I can resume simply, now, when I push on the letter or number contact (when I make a selection at wallbox, now nothing happens so I need to push directly manually on the coil to try) it active the reset magnet but one time or max 2 times. After, there is no longer enough energy (movement is weak than nil)
If I wait a long time, I can again have one or two movement of the reset coil.
Today, we've see with that the new C24 was not good (470uf) so we've try with a good value (300uf) but no change.
We have also see that R36 is actually a 22ohms and not a 18 ohms, but we don't have enough time to continue the work. We'll change it maybe tomorow.
With my simples words, I could say that a component strongly slows down or prevents the good energisation.
Thanks, Cedric.
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Post by Ron Rich on Mar 9, 2022 18:45:19 GMT
Hi Cedric,
"C-24" is a 300 mfd-- do not use anything higher then 330 mfd there, or you risk changing the timing-- Yes-- 22 ohms is just a little too high for R-36-- Let me know what you find -- How is the "rectangular" boxed 5.0 cap ? Ron Rich
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Post by cedric on Mar 9, 2022 19:13:48 GMT
Hi Ron,
Rectangular box was changed (not by me) and I don't know value. I'll check it also.
Could you tell me the reference of this rectangular cap in the schematic diagram?
Thanks, Cedric.
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Post by jukenorman on Mar 9, 2022 21:31:23 GMT
Hi Ron,
Increasing the value of C24 has no real impact on the stepper operation, but it will add a fraction of a second at the end of the sequence. I have a stepper where I have substantially increased the value of C24. I had to do this because I replaced a failed TR1 coil with a coil that was very slightly smaller hoping it would work. What then happened was that although I could see TR1 coming in at the first number pulse, the reset magnet was dropping out before it fully pulled in - so I stopped that by upping C24. Works fine and has done so for years! I'm not so sure about increasing R36 though, that might be a concern.
Norman.
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Post by Ron Rich on Mar 10, 2022 1:23:32 GMT
Hi Cedric,
C-18-- 5uf/300 (270 will work--go no lower !)( motor run cap) Ron Rich
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Post by Ron Rich on Mar 10, 2022 1:25:11 GMT
Hi Norman,
I dono-- In commercial use, I would not ont to increase the "down time" of the phono, or other wall-boxes for even one micro-second ___
Ron Rich
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Post by cedric on Mar 10, 2022 5:32:21 GMT
Hi Ron, Norman,
Thanks for your adivces. I'll check today and let you know.
Have a nice day.
Cedric.
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Post by cedric on Mar 17, 2022 13:47:35 GMT
Hi Ron, Hi Norman,
Sorry for long delay, lot of work actually.
Well, we've work on TSR. Now, what's happend: stepper works, but letter step takes all of the impulsions (letter + number)
I don't understand why number step doesn't work.
Have you an idea ?
Thanks and have a nice day.
Cedric.
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