Lazy Sony cdp950

Calamaro · 5th June 2008, 01:47 PM

Just bought an old Sony cdp950 with nice TDA1541A inside.
It works and reads discs but the transport makes a strange noise

. If I skip the tracks it seems to loose energy, the motor turns slower and slower...
Can someone suggest me some repair?
Thanks in advance

kevinkr · 5th June 2008, 03:54 PM

I'm confused, does it not play disks correctly or are you just observing the change in spindle motor speed that occurs during normal disk play from the inside of the disk to the outer edge.. (Constant linear velocity IIRC)

The noise may be an indication of a need for lubrication depending on where it comes from. Possibly a motor needs replacement at this point as well.

Calamaro · 5th June 2008, 07:20 PM

Kevin, thanks for your reply. Oh I feel so naif

So the motor speed changes... I've opened the player because a very loud noise (the clamp? the motor?) and I've noticed also this variable speed. Ok, I've lubricated the transport and the clamp with teflon grease, now it's better. I cleaned the lens with isopropyl alcohol but sometimes the disc still skips mostly on the first track. Can I adjust the laser without oscilloscope? I own a Sony service manual and it seems that I definitely need it.

5th June 2008, 01:47 PM	#1
Calamaro diyAudio Member Join Date: Mar 2008	Lazy Sony cdp950 Just bought an old Sony cdp950 with nice TDA1541A inside. It works and reads discs but the transport makes a strange noise . If I skip the tracks it seems to loose energy, the motor turns slower and slower... Can someone suggest me some repair? Thanks in advance

5th June 2008, 03:54 PM	#2
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	I'm confused, does it not play disks correctly or are you just observing the change in spindle motor speed that occurs during normal disk play from the inside of the disk to the outer edge.. (Constant linear velocity IIRC) The noise may be an indication of a need for lubrication depending on where it comes from. Possibly a motor needs replacement at this point as well. __________________ www.kta-hifi.net

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5th June 2008, 07:20 PM	#3
Calamaro diyAudio Member Join Date: Mar 2008	Kevin, thanks for your reply. Oh I feel so naif So the motor speed changes... I've opened the player because a very loud noise (the clamp? the motor?) and I've noticed also this variable speed. Ok, I've lubricated the transport and the clamp with teflon grease, now it's better. I cleaned the lens with isopropyl alcohol but sometimes the disc still skips mostly on the first track. Can I adjust the laser without oscilloscope? I own a Sony service manual and it seems that I definitely need it.

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