NAD C540 CD Player No Disc - 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 17th April 2010, 01:09 PM   #1
rkay5 is offline rkay5  United States
diyAudio Member
 
rkay5's Avatar
 
Join Date: Dec 2003
Location: LA,CA
Default NAD C540 CD Player No Disc

Hi,
I have a Nad C540 cd player that will not read any cds put a disc and get no disc so is the lens bad and can I fix it?
thanks Robert
  Reply With Quote
Old 17th April 2010, 01:20 PM   #2
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Does the lens bob up and down when the tray is closed with no disc inserted... that's the focus search operation.

During those few seconds can you see the laser lit... dull red glow, view from at least 30cm away.

Is the laser assembly at the correct rest position ? If moved away from that point and then power reapplied does it move back to the rest position ?

Is the turntable free ?

What pickup does it use ?

Has it worked and just suddenly failed or has it "got history" such as off ebay
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 17th April 2010, 03:05 PM   #3
diyAudio Member
 
Join Date: Apr 2010
I have a similar (but different) problem with mine, tray retracts but does not appear to understand when to stop trying to retract - eventually it spits the tray out again. This only happens with a disc in the tray.

Sanyo make (made, at least) rubbish transports, clearly. I'll be more careful next time I spend good money on what has turned out to be unreliable hardware.

Hopefully the new Rotel RA-1520 amp (picked up today!) will last as long as my now defunct Hitachi HA6 amp did - 28 years - with only minor repairs.
  Reply With Quote
Old 17th April 2010, 08:20 PM   #4
rkay5 is offline rkay5  United States
diyAudio Member
 
rkay5's Avatar
 
Join Date: Dec 2003
Location: LA,CA
Yes the lens did all it should but does not light that I can see.The player was working I get home put a CD's in all I get is no disc.So the Lens?
  Reply With Quote
Old 17th April 2010, 08:32 PM   #5
rkay5 is offline rkay5  United States
diyAudio Member
 
rkay5's Avatar
 
Join Date: Dec 2003
Location: LA,CA
Get this now it work playing CDR right now whats up.
Robert
  Reply With Quote
Old 17th April 2010, 11:30 PM   #6
rkay5 is offline rkay5  United States
diyAudio Member
 
rkay5's Avatar
 
Join Date: Dec 2003
Location: LA,CA
And now No Disc again so get a new Lens a SANYO SF-P101N on ebay but is it a 15pin or 16pin?
thanks
  Reply With Quote
Old 18th April 2010, 12:05 PM   #7
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Probably the lens, yes, but I would want to do more tests. Lasers don't usually fail "intermitant" so I would want to confirm it either does or doesn't light.

When it does play is the quality of signal OK, amplitude OK etc for which you need a 'scope.

Without and it's all guesswork
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 19th April 2010, 02:33 AM   #8
diyAudio Member
 
Join Date: Apr 2010
Fixed my problem (not the same as rkay5's issue), seems the tray had become misaligned with the tray drive mechanism. Removing the tray and manually (trial and error) finding the right spot by adjusting where the tray started in relation to the driving gears did the trick.

It turned out that although the tray was fully retracted, the gears hadn't rotated far enough to actuate the mechanism which lifts the lens assembly.
  Reply With Quote
Old 17th September 2010, 05:39 PM   #9
diyAudio Member
 
Join Date: Aug 2004
Location: UK
Send a message via MSN to audio_tony
Reviving an old thread, but thought this info may prove useful.

There is a mod for these players, re discs skipping / no disc errors.

Service Hint

C521/C541
C522/C524
C520/C540

If the customer has a complaint about a CD Player not being able to play a CDR or out of tolerance discs, try replacing these capacitors with the following values. This will also provide a cure on some players for “NO DISC” message.

C520/C521 /C522/C524 C540/C541

C122 is changed to 2.7pF C122 is changed to 2.7pF

C123 is changed to 0.01uF C123 is changed to 0.01uF

C124 is changed to 22pF C124 is changed to 22pF

C311 is changed to 220pF


Production:

This change has been implemented in production from serial number:
G19C52113901 - C521/C
G19C54108101 – C541/AH

G19C54108401 – C541/C
  Reply With Quote
Old 29th November 2012, 08:22 PM   #10
Mayank is offline Mayank  United States
diyAudio Member
 
Mayank's Avatar
 
Join Date: Oct 2004
Location: Falls Church, VA
Default Thanks for the service information!

Hi Tony:

I finally got to a NAD C540 which had been patiently waiting on my "projects-to-do-one-day" shelf for a while. It was in excellent cosmetic condition, but with the infamous "no disk" error.

I replaced the 3 capacitors as per the Service Hint you posted above. It works perfectly now and is now a part of my main living room set up

Thanks for sharing the info.

Rgds
Mayank

PS I also remember reading another thread where one of the members had also recommended upgrading the main power supply capacitor C529 (3300uF/16V) with 10000uF/16V and replacing the 4 diodes D515-517 (1N4001) with faster 3A diodes. I haven't done this as yet.
  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
Need Service Manual nad C540 helios999 Digital Source 0 24th October 2007 01:45 PM
Converting CAL CL10 5 disc player to a single disc player stoolpigeon Digital Source 0 27th May 2007 02:25 PM
nad c540 transport helios999 Digital Source 12 25th September 2005 10:38 PM
CD player not recognizing disc jarthel Digital Source 6 27th March 2005 01:57 AM
CD Player doesn't detect disc sometimes Gartak Digital Source 4 3rd January 2004 12:58 PM


New To Site? Need Help?

All times are GMT. The time now is 11:50 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