CDP-555ES Spindle motor not spinning - Page 2 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 27th June 2013, 11:14 PM   #11
SonyES is offline SonyES  United Kingdom
diyAudio Member
 
Join Date: Jun 2013
Thanks for your inputs so far, awaiting parts currently!
Got the power board components replaced faulty ones but hesitant to test them in case any other parts blow them out as the traffos are hardwired to the mainboard.

bit of a wait on some ICP-F38 x 2 and some TA7256P's in case any have gone after fuses are replaced.

Stu
  Reply With Quote
Old 5th July 2013, 09:02 PM   #12
SonyES is offline SonyES  United Kingdom
diyAudio Member
 
Join Date: Jun 2013
ICP F38 fuses replaced, I have some motor functions back now, namely chucking motor and loading tray, the sled seems to have power but rather than moving inward toward the spindle motor, (I believe this is what it should do when a cd is loading) it seems to be moving outward from powering on the unit.
If I manually move the sled the focus sequence seems to trip making the focus laser bob up and down and I can see the laser dot.
  Reply With Quote
Old 5th July 2013, 09:30 PM   #13
SonyES is offline SonyES  United Kingdom
diyAudio Member
 
Join Date: Jun 2013
I'm starting to think its the TA7256P chips or something to do with them, one of them is so warm to the touch on the heatsink it could burn you, where the other isn't all that hot.
IC203 (temperature now measured its well over 83 degrees centigrade) seems to be the focus tracking coil controller according to the schematics, would it getting hot be something feeding it? or the chip itself telling me its knackered!

Last edited by SonyES; 5th July 2013 at 09:43 PM.
  Reply With Quote
Old 6th July 2013, 03:38 AM   #14
diyAudio Member
 
Join Date: Oct 2006
If the player is sitting doing nothing, none of the TA chips should be more than a tiny bit warm. Under no circumstances is it normal for one to run at 83c.
  Reply With Quote
Old 6th July 2013, 07:18 AM   #15
Mooly is online now Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Its not normal to be hot like that. You need to check all the inputs to the chip and look at what the outputs are doing. For example if its being "told" to drive (say) a motor and that motor is jammed against its end stop then both chip and motor would overheat. If it is powering the motor coils of the pickup and putting high voltage across them then that will damage the pickup very quickly.
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 6th July 2013, 09:36 AM   #16
SonyES is offline SonyES  United Kingdom
diyAudio Member
 
Join Date: Jun 2013
Thanks for your replies, I had a feeling that temp was to hot which is why its only been switched on for a few seconds if that, sounds like I've got some tracing to do.
The sequence of events in the first few seconds of startup it tries to push the pickup back to its resting point then once the player is off it starts to move back toward the spindle, i'll check the input and output points and report back with voltages.

Stu

--------------------------------------------------------------------------------------------------------------------------------------------------------

At each pin as I turn on the unit briefly 3-4 seconds max enough to take a reading

1 -0.03
2 -0.03
3 -0.03
4 -0.03
5 -10.84 when switched off this drops to -0.80v and slowly dissipates probably down to a capacitor id guess?
6 2.52 as above -0.80v when off and drops
7 2.52
8 2.52
9 2.52
10 10.12

Last edited by SonyES; 6th July 2013 at 09:51 AM.
  Reply With Quote
Old 6th July 2013, 12:46 PM   #17
SonyES is offline SonyES  United Kingdom
diyAudio Member
 
Join Date: Jun 2013
Received replacement TA7256P chips today and replaced the running hot one, still getting hot so that's not the cause of it.
It has to be something between CNP202 main transformer power input and CNP301 as if I unplug all other cnp plugs other than this one the chip gets hot, if i remove that plug it stays cool, so its something in that circuit, another chip that seems to be running hot is the CXA1082A focus/tracking/sled servo, this is around 5-10 seconds after the power goes on.
similar story if i remove the plug that feeds this one from the back of the laser rf board.

service manual can be found here if anyone would like to look over the scematic: SONY CDP-555ESD 705ESD SM 1 Service Manual free download, schematics, eeprom, repair info for electronics

Last edited by SonyES; 6th July 2013 at 12:52 PM.
  Reply With Quote
Old 6th July 2013, 01:13 PM   #18
Mooly is online now Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Could this player "have some history" with the original problem of the failed circuit protectors having been caused by some unexplained event having occurred such as short between rails etc that could have zapped some semiconductors.
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 6th July 2013, 01:31 PM   #19
SonyES is offline SonyES  United Kingdom
diyAudio Member
 
Join Date: Jun 2013
its possible, I originally bought the unit off ebay quite cheaply as a bit of a project so if its not to be repaired it can always be used for parts.
Further into the circuit I have found the following.
If I unplug the ribbon cable to the laser diode/sled the large one that goes onto the board on the back of the transport here and plug in the white plug that goes to cnp301, it still heats up one of the chips but not the other, the cxa1082A seems very hot:
Click the image to open in full size.

Completely removed transport only the cxa1082a heats up.

Last edited by SonyES; 6th July 2013 at 01:35 PM.
  Reply With Quote
Old 6th July 2013, 03:16 PM   #20
SonyES is offline SonyES  United Kingdom
diyAudio Member
 
Join Date: Jun 2013
Temps on the CXA1082A reach around 48-50 degrees centigrade.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sony CDP-101 spindle motor hifi_sk Digital Source 40 10th July 2013 09:07 PM
Motor to spindle distance davecooper Analogue Source 0 26th September 2010 02:26 PM
Marantz CD 6000 or Sony CDP X 555ES Xperience Digital Source 1 9th January 2010 04:18 PM
TT motor spindle source BobM Analogue Source 2 8th May 2009 03:36 PM
Source for CDM 4 Spindle Motor auric Digital Source 1 13th November 2008 04:48 PM


New To Site? Need Help?

All times are GMT. The time now is 02:38 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2