Pioneer PD-75 Cd Player whistling

allanlew25 · 7th May 2006, 09:28 AM

I bought this reference series player in Manchester from new many years ago. It has the Pioneer stable platter mechanism and is in mint condition. It is a wonderful device and looks gorgeous. Even better it sounds gorgeous, that is it did.

From cold it will play a CD for a few minutes. When I eject the CD and insert another. no music, just a whistling sound from the player. The fault symptom persists until I switch off and leave for a few minutes. Then the cycle repeats. I should add that when whistling the palyer is slow to repond to ejecting the CD

Does anyone have any ideas what the problem is as really would like to repair it or have it repaired. iam a novice in this area but with knowledge consider myself reasonably technical competent.

Kind regards, Allan.

Netlist · 7th May 2006, 09:38 AM

I'd have a look at the power supply caps to begin with.
I don't know this particular player but some pioneer models suffered from bad spindle motors.

/Hugo

Ruach · 7th May 2006, 11:43 AM

The whistling sound is probably caused by the platter spinning out of control at high speeds. This also explains why it takes a longer time to eject the platter.

When this happens, one reason could be that the servo circuitry is down or that it is not receiving a proper clock signal.

Do a inspection of the 5V power supplies to the dac chip. I believe that the clock draws its supply from the same rails.

As a last resort, you can always send it back to Pioneer for servicing. Hope this helps.

Audiofanatic · 7th May 2006, 12:00 PM

Hi Guys,

I have two Pioneers in my lab and both had the same problem.
In both cases the laser unit wasn't good (read: dead).

I've replased both and (this is the pain in the b*t part) adjusted the player to factory specs. After that, both played like new and sound better than ever.

I hope this helps.

Best,

Audiofanatic

Ruach · 7th May 2006, 12:10 PM

That could be another reason too though I have yet to encounter it.

Replacing the laser yourself would be very painful

Netlist · 7th May 2006, 12:22 PM

Quote:

Originally posted by Ruach

Replacing the laser yourself would be very painful

Agreed, I tried a few time myself but ended up sending it to Pioneer.

/Hugo

7th May 2006, 09:28 AM	#1
allanlew25 diyAudio Member Join Date: May 2006	Pioneer PD-75 Cd Player whistling I bought this reference series player in Manchester from new many years ago. It has the Pioneer stable platter mechanism and is in mint condition. It is a wonderful device and looks gorgeous. Even better it sounds gorgeous, that is it did. From cold it will play a CD for a few minutes. When I eject the CD and insert another. no music, just a whistling sound from the player. The fault symptom persists until I switch off and leave for a few minutes. Then the cycle repeats. I should add that when whistling the palyer is slow to repond to ejecting the CD Does anyone have any ideas what the problem is as really would like to repair it or have it repaired. iam a novice in this area but with knowledge consider myself reasonably technical competent. Kind regards, Allan.

7th May 2006, 12:00 PM	#4
Audiofanatic diyAudio Member Join Date: Oct 2002 Location: The Netherlands, Utrecht	LASER Unit Hi Guys, I have two Pioneers in my lab and both had the same problem. In both cases the laser unit wasn't good (read: dead). I've replased both and (this is the pain in the b*t part) adjusted the player to factory specs. After that, both played like new and sound better than ever. I hope this helps. Best, Audiofanatic __________________ Be nice to animals.

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7th May 2006, 09:38 AM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	I'd have a look at the power supply caps to begin with. I don't know this particular player but some pioneer models suffered from bad spindle motors. /Hugo

7th May 2006, 11:43 AM	#3
Ruach diyAudio Member Join Date: May 2003 Location: Singapore	The whistling sound is probably caused by the platter spinning out of control at high speeds. This also explains why it takes a longer time to eject the platter. When this happens, one reason could be that the servo circuitry is down or that it is not receiving a proper clock signal. Do a inspection of the 5V power supplies to the dac chip. I believe that the clock draws its supply from the same rails. As a last resort, you can always send it back to Pioneer for servicing. Hope this helps.

7th May 2006, 12:10 PM	#5
Ruach diyAudio Member Join Date: May 2003 Location: Singapore	That could be another reason too though I have yet to encounter it. Replacing the laser yourself would be very painful

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