Datasheet needed - 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 28th January 2003, 10:47 AM   #11
diyAudio Member
 
tortello's Avatar
 
Join Date: Jul 2001
Location: Genoa (ITALY)
Hello all, thanks for your help.
The Cd player is a Denon 1520, it was a good machine - with fine mechanical construction and D/A converters - but

that's true, this is an old machine (1990!!).
The laser pick-up had been changed in the 1996, the CD player could not read few discs, then more, then all of them.
So the (very expensive) replacement.
Now the behaviour is different, but I don't know if the cause is different too.
When I insert a disc in, the player sometimes refuses to read it, the rotation motor doesn't move absolutely (there are only few millivolts between the two poles, and

the motor is OK, not shorted), even if the pick up tries to focus the trace - I can see the lens movement.
When time to time it decides to work, the player work perfectly, all the discs can be read, even the mastered ones.
It seems that there is a sort of correlation between the chip freezing and the operating condition.
I'm not a digital guy, every help will be appreciated!
Thanks again
Marcello
  Reply With Quote
Old 28th January 2003, 12:08 PM   #12
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Tortello

Check if the cd runs free (move it by hand) when it is inserted in the player. If it doesn't change a rubber: Denon part number 4620083005. If cd runs free i would suspect the laser unit. I think itís a KSS151A. You can try the following: on the unit there is a small trim pot. Mark it, so you can bring it in the same position afterwards. Turn it a little (i think counterclockwise) and try to play a cd. Try a few cd's. If they start playing better now, it's definitely the laser unit. 1990-1996 is 6 years. 1996-2003 is also 6 years. If you play a lot of cd's...

/Hugo -
  Reply With Quote
Old 28th January 2003, 12:14 PM   #13
diyAudio Member
 
tortello's Avatar
 
Join Date: Jul 2001
Location: Genoa (ITALY)
Thanks, I'll try this evening.
Marcello
  Reply With Quote
Old 29th January 2003, 06:20 AM   #14
hifiZen is offline hifiZen  Canada
diyAudio Member
 
hifiZen's Avatar
 
Join Date: May 2001
Location: Mountain View, CA
hmm... actually, if the disc just isn't spinning, it very well could be either the motor or motor driver IC. You should observe the signal going to the motor to see what's happening. If the focus seems to work, then most likley the laser and photodiodes are just fine.
__________________
- Chad.
  Reply With Quote
Old 1st February 2003, 12:06 AM   #15
hifiZen is offline hifiZen  Canada
diyAudio Member
 
hifiZen's Avatar
 
Join Date: May 2001
Location: Mountain View, CA
also, check this website for spare parts:

http://products.sel.sony.com/semi/
and
http://servicesales.sel.sony.com/

you never know...
__________________
- Chad.
  Reply With Quote
Old 25th March 2007, 11:35 AM   #16
hueser is offline hueser  Germany
diyAudio Member
 
Join Date: Mar 2004
Location: Hannover
Default EFM Signal Specification

Hi,

I seem to have a problem in my CD player either with the EFM signal coming from the CXA1081 or with a processor chip (CXD 1135) sending the data signal to the DAC (PCM 56). The output of both PCM 56 is dead whereas the inpupt signal is permanently high. The EFM output of the CXA1081 has a low level of 1,5 V which does not seem to be right. The high level is approx. 4,8 V. A datasheet for the CXA1081 would be great, too. Does anybody know the specs of an EFM signal ?

Cheers

Marc
  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
Datasheet of CXD1165P needed beauty_divine Digital Line Level 0 29th August 2008 04:41 PM
Sony CXD2510Q datasheet needed Johnpang Digital Source 1 18th September 2006 05:06 PM
UPC2506v Datasheet Needed hotwaterwizard Chip Amps 0 4th March 2004 02:21 AM
sony CXD2510Q datasheet needed hifi Digital Source 1 11th September 2003 07:46 AM
ROHM Transistors datasheet needed grataku Solid State 1 30th May 2001 09:10 PM


New To Site? Need Help?

All times are GMT. The time now is 08:07 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