odyciv410
New Member
If it works, don't fix it
Posts: 18
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Post by odyciv410 on Nov 14, 2023 20:50:22 GMT
Thank you Marty for keeping me focused and on task.
I recall reading the link you provided some time ago prepping myself for this. It is amazing to me how a 2nd read of what you have already read helps with comprehension.
As for Contact Care:
First, I need to know type and condition before I can use the proper restoration method. My research shows the relay type is an "Open Blade" so I plan to use a standard plastic safe, water based solvent.
As for the contact type, would you know if it a precious metal type that needs special attention? I also am concerned I do not have the eye to adequately determine its condition beyond cleaning. (Pitted, Burned)
I will start with cleaning and research further.
As for Adjustments:
I was reading about Power Relay contact GAP and Pressure adjustments in the service manual. If adjustments were necessary, what specialized tool would be required for those precise measurements?
Thanks again,
Steve
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odyciv410
New Member
If it works, don't fix it
Posts: 18
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Post by odyciv410 on Nov 15, 2023 21:32:20 GMT
Ron Rich on May 12th 2019 @ 9:20 pm posted a tip that helped me get the record ejected. I followed his instruction below. The motor started, followed by record eject.
"If your motor "dies" upon pick up of a 45 rpm record--slightly pull back on the record clamp arm--If it starts the motor then, you ether havea bad 45 TASU-1, or a motor/drive train, "gummed" up. If the 45TASU-1 relay energizes, the problem is not in the 25 volt circuit. Ron Rich"
He also, in his statement, confirms our questionable TASU1. I plan to clean the Power Relay contacts as soon as I have everything I need.
Now my turntable is now spinning continuously.
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Post by jukeboxmarty on Nov 15, 2023 23:26:54 GMT
You can test the basic operation of the relay by watching it... it should open and close with the clamp arm switch. Glad you made some determination based on Ron's post, but it seems that info was already mentioned on this thread!  |
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odyciv410
New Member
If it works, don't fix it
Posts: 18
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Post by odyciv410 on Nov 16, 2023 15:08:10 GMT
Agreed, I had not made the connection between your "clamp arm switch" and the clamp arm itself. I did verify that the power relay does NOT energize when I slightly pull back on the clamp arm. I have been researching the "clamp arm switch" and so far I have only found reference to the Clamp Arm "S" contact.
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Post by jukeboxmarty on Nov 16, 2023 17:10:56 GMT
I'm confused.
You said the pulling back on the clamp arm started your motor. Pulling back on the clamp arm should de-energize the relay.
How did the motor start running if the relay never changed state?
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odyciv410
New Member
If it works, don't fix it
Posts: 18
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Post by odyciv410 on Nov 16, 2023 20:00:24 GMT
Marty, Sorry about the confusion. Maybe this will help. You might need to click the video to enlarge for detail. In this video, you can clearly see me slightly pulling back on the record clamp arm that y'all suggested. The first time I performed this, the motor started, ejected a record, and the motor / TT hasn't stopped spinning since. photos.app.goo.gl/aSrkEfujk9g9gEZ28In this video, it shows the state of the power relay (k751) during the clamp arm pulled back procedure. As you can see in the video, the power relay does not open and close as you pointed out it should. I have not yet witnessed the Power Relay (K751) Energize. Possible trouble with the 24v circuit as Ron pointed out? photos.app.goo.gl/Sxh8dGvRQJus1vgL9I am still unclear on the "Clamp Arm Switch" you refer to. Thanks for your attention, as always it's appreciated. Steve |
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Post by jukeboxmarty on Nov 16, 2023 23:58:18 GMT
Doesn't your manual have a section for the mechanism adjustments?
The clamp arm switch is clearly shown in the "CLAMP ARM SWITCH - CONTACT GAP AND BLADE ADJUSTMENT" section.
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odyciv410
New Member
If it works, don't fix it
Posts: 18
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Post by odyciv410 on Nov 30, 2023 19:09:46 GMT
Marty, I have reviewed the Mechanism Adjustments section pg 2473-2512 and failed to locate "CLAMP ARM SWITCH - CONTACT GAP AND BLADE ADJUSTMENT" Do you have a page number?
I have ordered the Seeburg Mechanism Guide from alwaysjuken.com. I hope to find reference to the "CLAMP ARM SWITCH" in it.
Progress: After cleaning the Power Relay Switch (K751) I found the behavior of the motor has changed. If I manually switch (K751) with my finger I notice the RPM of the motor changes rpm speed but motor never stops spinning.
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Post by jukeboxmarty on Nov 30, 2023 19:28:19 GMT
Try page 2508.
Although the motor power runs through relay K752, this relay does not function to turn the motor on and off. It only serves the change the speed. The behavior you are reporting seems correct. The power to the motor is controlled by the motor control switch in the TCC.
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