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Old 26th October 2010, 07:05 PM   #1
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Join Date: Jun 2009
Unhappy Technics SL-15 problem

Although all functions operate on my SL-15 there are two things that should be addressed:
1. When the arm lowers itself onto the record, it practically drops down and does'nt show any damping in the movement. Is this an electrical thing or is something slipping too easily without any friction?
2. The "plop" when the stylus comes into contact with the record is audible, so the muting circuitry does'nt do it's job.
Can anyone tell me how to remedy these shortcomings?
I do have the Service Manual.
Looking forward to any suggestions!
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Old 29th October 2010, 09:12 PM   #2
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Join Date: Jun 2009
Default Technics SL-15 problem

There must be someone who can give me some advice or can tell me
who to turn to.....??
Thanks for looking!
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Old 1st November 2010, 09:15 AM   #3
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stoN_Cold's Avatar
Join Date: Mar 2004
Location: Belgrade RS
See step 2 in Adjustment procedure!

Regards zeoN_Rider
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Old 1st November 2010, 11:40 AM   #4
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Sadly, step 2 only refers to the adjustment of the tone arm height and the arm lift in relation to each other.
It does'nt say anything about my problem. The lift rod flicks down and that swift movement causes the arm to drop instead of slowly descending. Is the lift rod supposed to act so uninhibited or should it move very slowly as to let the arm down gently. If so, how can I adjust the speed of movement of the lift rod?
Second question: where is the problem if the contact between record and arm/cartridge is not muted, as it should be?
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Old 1st November 2010, 12:07 PM   #5
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kevinahcc20's Avatar
Join Date: Apr 2009
Location: Farmington Hills, MI USA
Have you searched the forums at VinylEngine - best source for answering problems like yours.
Kevin(ahcc20)...I'd rather have a bottle in front of me than a frontal lobotomy!
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Old 1st November 2010, 01:25 PM   #6
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Join Date: Jun 2009
Thanks Kev, haven't done that but will give it a go!
If in the mean time anyone could serve me with advice here...
please do!
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Old 6th November 2010, 05:05 PM   #7
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Can anybody tell me if the muting relay is normally closed or normally open?
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Old 7th November 2010, 07:19 PM   #8
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Join Date: Nov 2004
Location: Italy
The relay is normally close with the arm in the rest position or when the turntable is off.
You should find the output shorted since the relay is not in the signal path but is shorting the output for the muting.
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Old 7th November 2010, 09:01 PM   #9
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Thanks redpepper!
So when normally closed, it is a bit strange that the muting does'nt work. Must be some unwanted voltage on the relay that keeps it open or, less likely, relay is stuck in "open" position or both contacts fail to short the output.
This seems a bit odd to me.
Have to figure out what causes the relay to remain activated (or stuck) in open position.
Surgery required! After Christmas....!
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