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Post by Lincoln on Mar 1, 2018 20:40:45 GMT
A stray SPS160 followed me home yesterday. After I got it home and opened up it became apparent that it has been sitting way longer than the seller indicated. I got the mech disassembled, cleaned and put back together. The mech scans and will trip and play beautifully going right to left, but going left to right the motor runs out of power and stops.
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Post by Ron Rich on Mar 1, 2018 22:57:19 GMT
Hi Lincoln,
What didja do--walk in right circles ?? Is the larger half of the motor cap being added during scan ? How did you "clean it --and put it back together" -- did you PROPERLY, oil it with the proper oil ?
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Post by Lincoln on Mar 1, 2018 23:22:18 GMT
I'll check the capacitor. I took every moving part off the mech. Degreasered everything. I used the proper oli. Everything moves free and smoothly. I just thought it odd that it goes one way fine, but struggles going the other way.
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Post by Ron Rich on Mar 1, 2018 23:31:16 GMT
Check thrust bearing adjustments, Did you remove the bearing bracket assemb. on top of the motor ? Did you remove-clean the motor ?--check reversing switch contacts -- Ron Rich
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Post by Lincoln on Mar 2, 2018 0:13:28 GMT
I had the motor out, but did not take it apart to clean it. I'll check the reversing switch. I did have the assembly on top the motor apart and cleaned.
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Post by Ron Rich on Mar 2, 2018 3:52:20 GMT
Did you re-adjust that thrust bearing ? Did yoy remove the worm drive gear under it ? Ron Rich
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Post by Lincoln on Mar 2, 2018 13:45:30 GMT
I did have that worm drive out, and re-adjusted that thrust bearing on top. I cleaned the reversing switch, still same result. I'm leaning toward it being electrical because if I turn the drive coupler by hand it turns effortlessly.
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Post by robnyc on Mar 2, 2018 15:01:38 GMT
. I'm leaning toward it being electrical because if I turn the drive coupler by hand it turns effortlessly. Yep, take a look at the scan assembly and check for burned contacts. Watch to see if they start arching after the first pass that deducts one notch. Check also the contacts on the reversing switch. If they were allowed to arc at the reversing point, they may have become pitted when the paddle is flipped. I've been too busy lately, so late to this one. Apologies is the was already covered. RobNYC |
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Post by Ron Rich on Mar 2, 2018 15:22:11 GMT
As Rob said--check the scan control contacts in the DCC--be sure the .01/1400 kv cap is soldered to that contact set, and it is properly adjusted.Also, if you have a SAS installed in that phono--check the relay contacts on that, and or the power plug/dummy plug on the DCC--
Did you install the motor coupler removing all "up-down" play in the motor shaft ? Are you sure the turn table and clutch thrust bearings are correctly adjusted ? Ron Rich
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Post by Lincoln on Mar 4, 2018 0:15:51 GMT
I think I have traced the problem to the reversing switch. Just looking in the back the contacts appeared to be making contact, but a voltmeter said otherwise. I temporary put a jumper wire across it, and scans the other way fine. I'll pull it out when I get a chance so I can inspect it more closely and determine the problem.
By the way this phono was rescued from a barn, and over all is in about as gooda shape as the bride of Frankenstein. I guess I just like to see them brought back to life.
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Post by Ron Rich on Mar 4, 2018 0:35:12 GMT
Hi Lincoln,
READ our "FAQ's--How to check switches---"
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Post by Lincoln on Mar 6, 2018 3:31:32 GMT
The problem was a pitted contact in the reversing switch. Got it cleaned up and working good. Once again, thank you gentlemen for your helpm
By the way, you will probably be hearing from me again after I pull the dead mice out of the amp.
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