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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. |
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30th Jan 2018, 4:37 pm | #1 |
Heptode
Join Date: Aug 2011
Location: Bristol, UK.
Posts: 538
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Sony WM-D6C speed issues
Hi,
I have the above Walkman which was working fine until a customer fried the servo I.C by getting the polarity of the mains cable wrong. The I.C was a Sony cx20084 which has now been replaced like for like. I now have a problem with the thing playing slowly. Has anyone much experience with these units? Many thanks. |
30th Jan 2018, 7:16 pm | #2 | |
Nonode
Join Date: Jan 2008
Location: Milton Keynes, Bucks. UK.
Posts: 2,552
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Re: Sony WM-D6C speed issues
Quote:
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When I die, please don't let my Wife sell my collection for the amount I told her I paid for it! |
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30th Jan 2018, 10:04 pm | #3 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,637
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Re: Sony WM-D6C speed issues
I suspect he means the DC cable from a mains adapter.
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30th Jan 2018, 11:28 pm | #4 |
Octode
Join Date: Jul 2014
Location: Petersfield, Hampshire, UK.
Posts: 1,043
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Re: Sony WM-D6C speed issues
Hi
Check q601 motor driver transistor and that all the thin wires are still connected to the PC ,they tend to fall off very easily Pin 1 of the chip connects to the speed sensor via one of these thin wires There are some tants which don't like reverse polarity Did you use anti static precautions when changing the chip ? Check tracks from the chip ,they are very thin ! Circuit is available free on line |
30th Jan 2018, 11:29 pm | #5 |
Octode
Join Date: Jul 2014
Location: Petersfield, Hampshire, UK.
Posts: 1,043
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Re: Sony WM-D6C speed issues
Just checking you know there is a speed control pot on the back of the deck ?
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1st Feb 2018, 12:24 am | #6 |
Pentode
Join Date: Nov 2013
Location: Coventry, West Midlands, UK.
Posts: 199
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Re: Sony WM-D6C speed issues
Let me know how you get on and I will send you a 1000hz tape with an android app to readjust the the speed back.
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2nd Feb 2018, 1:39 pm | #7 |
Heptode
Join Date: Oct 2007
Location: Birmingham, West Midlands, UK.
Posts: 615
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Re: Sony WM-D6C speed issues
This may be silly but have you checked the manual speed tune switch at rear is in the auto position?
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