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Pioneer SK-21 repair?


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#1 Kmulkey

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Posted 24 April 2013 - 04:35 PM

I have a Pioneer SK-21 that I'd like to get repaired. I'm near Chicago in case anyone's close. Tapes will sometimes play for 10-15 seconds, then stop, or slow down. Sometimes the pinch roller doesn't engage but the capstan does turn. Also, the right hub either moves slow or doesn't move at all.
Thanks in advance.

#2 baddboybill

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Posted 24 April 2013 - 04:39 PM

I have a Pioneer SK-21 that I'd like to get repaired. I'm near Chicago in case anyone's close. Tapes will sometimes play for 10-15 seconds, then stop, or slow down. Sometimes the pinch roller doesn't engage but the capstan does turn. Also, the right hub either moves slow or doesn't move at all. <br /><br />Thanks in advance.
<br /><br />I'm in Reddick maybe 60 miles south of Chicago and I can work on this for you. PM me ;-)

#3 baddboybill

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Posted 02 May 2013 - 11:42 AM

I have refurbished Kieths Pioneer and here is a quick explanation. I took back cover off and detached 2 antenna wires and hot and ground wires. Then I took all knobs off and took screws holding tuner/amp board in. Then took screws out holding in deck, speakers and a few other things. I removed everything carefully not to do any damage. I had to blow off all dust and dirt from everything. Took off grills and washed all plastic parts. Clean all switches and pots including record bar. Took deck apart to clean all dust and dirt and remove old grease. Clean heads and all tires. Demagnetize tape head. Clean good belts and replace bad ones. Put back together and hook up power to test deck. Adjust motor speed and azimuth if needed. Put new longer screw in amp board where post was slightly cracked. Put new screw in amp chip holding the heat sink to it. Dry all parts and put everything back together. Test all functions this is just a very simple explanation. It took approximately 8-9 hours and that's only because I had to take back apart to readjust motor speed on deck. Most deck motors face back of unit to easily adjust when back is off. But not pioneer and usually in better built boxes all wires are plugged for easy removal. But not pioneer, they are all soldered anyway her are some before and after pics :-) Attached File  ImageUploadedByTapatalk1367516335.579882.jpg   238.27K   23 downloads Attached File  ImageUploadedByTapatalk1367516351.634480.jpg   191.53K   24 downloads Attached File  ImageUploadedByTapatalk1367516365.136990.jpg   148.18K   24 downloads Attached File  ImageUploadedByTapatalk1367516388.852436.jpg   206.61K   22 downloads Attached File  ImageUploadedByTapatalk1367516404.007594.jpg   185K   21 downloads Attached File  ImageUploadedByTapatalk1367516426.000869.jpg   210.29K   21 downloads Attached File  ImageUploadedByTapatalk1367516473.335214.jpg   214.73K   22 downloads Attached File  ImageUploadedByTapatalk1367516488.990667.jpg   187.75K   24 downloads Attached File  ImageUploadedByTapatalk1367516505.963261.jpg   175.61K   26 downloads Attached File  ImageUploadedByTapatalk1367516533.947304.jpg   164.67K   19 downloads

#4 baddboybill

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Posted 02 May 2013 - 11:47 AM

More pics:-) Attached File  ImageUploadedByTapatalk1367516608.603443.jpg   182.71K   25 downloads Attached File  ImageUploadedByTapatalk1367516631.304221.jpg   208.03K   23 downloads After pics Attached File  ImageUploadedByTapatalk1367516658.552735.jpg   172.84K   24 downloads Attached File  ImageUploadedByTapatalk1367516673.575222.jpg   170.48K   26 downloads Attached File  ImageUploadedByTapatalk1367516727.395684.jpg   227.77K   21 downloads Testing and adjusting deck Attached File  ImageUploadedByTapatalk1367516765.669208.jpg   207.41K   25 downloads Attached File  ImageUploadedByTapatalk1367516789.151585.jpg   148.96K   25 downloads Clean parts Attached File  ImageUploadedByTapatalk1367516812.263095.jpg   160.35K   24 downloads Attached File  ImageUploadedByTapatalk1367516827.037962.jpg   185.56K   31 downloads Attached File  ImageUploadedByTapatalk1367516845.293683.jpg   188.53K   24 downloads

#5 baddboybill

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Posted 02 May 2013 - 11:48 AM

And finished :thumbsup: Attached File  ImageUploadedByTapatalk1367516920.421988.jpg   189.18K   24 downloads

#6 Sazeus

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Posted 02 May 2013 - 12:19 PM

Good job, I need to take a leaf out of your book.

#7 baddboybill

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Posted 02 May 2013 - 04:34 PM

Good job, I need to take a leaf out of your book.
Thanks :-)

#8 oldskool69

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Posted 02 May 2013 - 07:58 PM

I have an SK-21 and have saved this for reference. :-D



#9 baddboybill

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Posted 03 May 2013 - 12:08 AM

I have an SK-21 and have saved this for reference. :-D
The downfall is all wires are soldered in but it's not very big so it's pretty simple to pull it all out at once without desoldering ;-)

#10 Kmulkey

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Posted 15 May 2013 - 09:41 AM

Baddboybill does great work! Very nice to have this working like new! Thanks Bill!

 

Keith



#11 baddboybill

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Posted 15 May 2013 - 10:13 AM

Baddboybill does great work! Very nice to have this working like new! Thanks Bill!

Keith


Thanks Kieth, glad your enjoying it fully :thumbsup:

#12 Shortstuff

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Posted 06 January 2018 - 04:54 AM

To add to this I have a project box coming, got it for 45.00 needs a good cleaning inside & out + tape deck not working. I have taken soldering class and was certified now I need my own station!