Pioneer PD-75 Repair

hifileslie · 13th December 2008, 06:51 AM

I have just taken my PD-75 out of the attic and it will not read CDs any more. I assumed it might be condensation so tried to take off the top cover to "have a look". I undid the obvious 4 securing screws on the top plate, but the cover would not lift off. Are there other fixings, or do I need to use more force!!!!

jitter · 13th December 2008, 07:05 AM

Can you move it a little, or is it completely stuck?

Are you sure four screws is all? Most of the CD-players I had, had four or six screws on the sides and two or three at the back.

Sometimes the edge of the cover hooks behind the front. To unhook it you have to lift the rear of the cover up before you can pull it away. Usually a 45 degree angle will do.

If the whole thing seems to be stuck solidly together, and you're sure all screws are out, then more force might be needed. Maybe there's some anti-vibration pad between the transport and the cover that has become stuck. I don't know the PD-75, so I'm just guessing here...

Nanook · 13th December 2008, 07:15 AM

the side panels have to come off, then the cover screws. something like 7 of them (4 on the sides, 3 on the back)

hope it helps...

georgehifi · 13th December 2008, 08:09 AM

Quote:

Originally posted by hifileslie
I have just taken my PD-75 out of the attic and it will not read CDs any more. I assumed it might be condensation so tried to take off the top cover to "have a look". I undid the obvious 4 securing screws on the top plate, but the cover would not lift off. Are there other fixings, or do I need to use more force!!!!

Once you get it open be very careful, you may have what has happen to allot of these Pioneer lasers, is that with a bit of humidity the lenses falls out of the laser because they were glued in place with water soluble glue.
So be careful you may find a little lense loose inside somewhere, I was lucky with mine as when the stable platter came out for me to load a disc, the lense was sitting on the platter
Cheers George

jitter · 13th December 2008, 09:04 AM

Now that's what I call a design flaw...

Did you glue it back yourself?

georgehifi · 13th December 2008, 09:48 AM

No I gave it back to Pioneer and got them to replace the whole laser as it was still under warrenty.
They told me about the water based glue and humidity, it happens more with the stable platter ones because the laser faces down and gravity takes over when the glue gets soluable. so the lense falls out.

Cheers George

hifileslie · 13th December 2008, 02:42 PM

I have not tried to take off the top again yet, but noticed that the CD is not spinning after the draw closes. Any thoughts please?

jitter · 13th December 2008, 03:21 PM

Might be the laser. If I put a CD upside down in my CD-player (which, of course, is the right way for a PD-75) it won't spin the disc. It seems that the laser first needs to see a disc before the player decides to spin it. If your's has lost its lens like georgehifi's...

Another option I'm thinking about is oxidation of contacts. No doubt there are lots of connectors inside that might have oxidized during the long stay in the attic. Time to open it up and have a peek inside I'd say...(I already looked up a picture on the internet, looks like it's crowded inside a PD-75).

jitter · 18th December 2008, 02:54 PM

Any luck yet?

hifileslie · 18th December 2008, 03:24 PM

I have had a look inside and there is nothing obvious wrong with it! I have now found someone who has repaired the PD-75/65 before and will take it to him in the New Year.

13th December 2008, 06:51 AM	#1
hifileslie diyAudio Member Join Date: May 2002	Pioneer PD-75 Repair I have just taken my PD-75 out of the attic and it will not read CDs any more. I assumed it might be condensation so tried to take off the top cover to "have a look". I undid the obvious 4 securing screws on the top plate, but the cover would not lift off. Are there other fixings, or do I need to use more force!!!!

13th December 2008, 07:15 AM	#3
Nanook diyAudio Member Join Date: Feb 2004 Location: Chinook Country.Alberta	I have an old PD-54 the side panels have to come off, then the cover screws. something like 7 of them (4 on the sides, 3 on the back) hope it helps... __________________ stew ☮ -"A sane man in an insane world appears insane."

13th December 2008, 09:48 AM	#6
georgehifi diyAudio Member Join Date: Sep 2003 Location: Manly Australia (Jewel of the Pacific)	No I gave it back to Pioneer and got them to replace the whole laser as it was still under warrenty. They told me about the water based glue and humidity, it happens more with the stable platter ones because the laser faces down and gravity takes over when the glue gets soluable. so the lense falls out. Cheers George __________________ Avatar : Production Lightspeed Attenuator www.lightspeedattenuator.com

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13th December 2008, 07:05 AM	#2
jitter diyAudio Member Join Date: Aug 2004 Location: Eindhoven, The Netherlands	Can you move it a little, or is it completely stuck? Are you sure four screws is all? Most of the CD-players I had, had four or six screws on the sides and two or three at the back. Sometimes the edge of the cover hooks behind the front. To unhook it you have to lift the rear of the cover up before you can pull it away. Usually a 45 degree angle will do. If the whole thing seems to be stuck solidly together, and you're sure all screws are out, then more force might be needed. Maybe there's some anti-vibration pad between the transport and the cover that has become stuck. I don't know the PD-75, so I'm just guessing here...

13th December 2008, 09:04 AM	#5
jitter diyAudio Member Join Date: Aug 2004 Location: Eindhoven, The Netherlands	Now that's what I call a design flaw... Did you glue it back yourself?

13th December 2008, 02:42 PM	#7
hifileslie diyAudio Member Join Date: May 2002	I have not tried to take off the top again yet, but noticed that the CD is not spinning after the draw closes. Any thoughts please?

13th December 2008, 03:21 PM	#8
jitter diyAudio Member Join Date: Aug 2004 Location: Eindhoven, The Netherlands	Might be the laser. If I put a CD upside down in my CD-player (which, of course, is the right way for a PD-75) it won't spin the disc. It seems that the laser first needs to see a disc before the player decides to spin it. If your's has lost its lens like georgehifi's... Another option I'm thinking about is oxidation of contacts. No doubt there are lots of connectors inside that might have oxidized during the long stay in the attic. Time to open it up and have a peek inside I'd say...(I already looked up a picture on the internet, looks like it's crowded inside a PD-75).

18th December 2008, 02:54 PM	#9
jitter diyAudio Member Join Date: Aug 2004 Location: Eindhoven, The Netherlands	Any luck yet?

18th December 2008, 03:24 PM	#10
hifileslie diyAudio Member Join Date: May 2002	I have had a look inside and there is nothing obvious wrong with it! I have now found someone who has repaired the PD-75/65 before and will take it to him in the New Year.

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