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Old 22nd January 2006, 08:46 PM   #1
PIY is offline PIY  United Kingdom
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Default Pioneer cd player pots

I've just been given a pioneer PD-8700 cd player. The previous owner had for some reason played around with the pots so the sounds a bit off at the moment and I was wondering if anyone could advise on how to set the pots.

PIY
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Old 22nd January 2006, 08:52 PM   #2
anatech is offline anatech  Canada
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Hi PIY,
The only thing you can do is send it in for service. The tech should be really good at alignment and Pioneer products. Tell them the pots have been played with.

Sorry, it's not the answer you wanted.

To get it closer right now, mark the current positions. If you gently turn the control, there should be a slight indent that you can feel at the factory position. This may or may not work.

Guess what I'm recommending. I can only hope your local service choices are good.

-Chris
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Old 23rd January 2006, 05:38 AM   #3
wa2ise is offline wa2ise  United States
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Get the service manual if avaliable. Then you would know what the adjustments do and how to make them.

Usually I mark the trimpots with a sharp marker pen their orginal positions before playing with them so I can return them to their orginal positions after mucking around witgh them. Pick a point where you can draw a line across the moving part to a stationary part.
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Old 23rd January 2006, 05:24 PM   #4
PIY is offline PIY  United Kingdom
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Thanks for the replies guys. Do you know where I might be able to get a copy of the service manual. Are pioneer helpful for providing these?

thanks

PIY
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Old 23rd January 2006, 08:28 PM   #5
anatech is offline anatech  Canada
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Hi PIY,
Yes they are. They may make you wait.

Do you have any experience with this?

-Chris
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Old 23rd January 2006, 09:48 PM   #6
PIY is offline PIY  United Kingdom
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I've not had any experiance with cd players but have done a fair few other things. Thought I may as well have see if I can have a try myself as i doubt its really worth the cost of getting pioneer to do it.

PIY
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Old 23rd January 2006, 09:55 PM   #7
anatech is offline anatech  Canada
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Hi PIY,
Fair enough. A 'scope with a time base of 0.5uS / div is recommended. The manual of course. I was hoping you'd have a friendly tech by your side to help.

Do not touch the diffraction grating adjustment in the head. It is very touchy. Read the instruction through twice at least. Mark the pot positions.

Good luck.

-Chris
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Old 23rd January 2006, 10:09 PM   #8
PIY is offline PIY  United Kingdom
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Thanks for all the advice Chris, I'll let you know what, if any, luck i have with it

PIY
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Old 23rd January 2006, 10:14 PM   #9
anatech is offline anatech  Canada
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Hi PIY,
If you get confused or unclear on something. Stop and post a question.

-Chris
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Old 23rd January 2006, 11:05 PM   #10
Reina is offline Reina  Germany
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hi piy,

i have a schematic for the pd 9700. please mailing me, if you interested. can tell you more tomorrow...
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