Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Luxman D-105  Sled won't park.
Luxman D-105  Sled won't park.
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
Thread Tools Search this Thread
Old 10th January 2011, 05:49 PM   #1
pdlemen is offline pdlemen  United States
diyAudio Member
Join Date: Jan 2011
Default Luxman D-105 Sled won't park.

An oldie but a goodie from 1989. It is basically a Sony CD player with tube outputs. It plays discs fine with no skipping. If the
stop button is pushed anywhere from imediately after play is pushed,to half way through a disc,the sled drive moves back towards the parking position and does not stop. The sled drive worm wheel clicks against the optics rack gear a few times and then stops. The position sense switch closes properly when the rack gear hits it and that is seen happening on pin 22 of the CXA1082BS servo chip. If pin 22 is shorted right to ground after stop is pushed,it acts the same way so it is not the switch.(This IC also provides the sled drive output on pin 20) Interestingly enough,if the disc is allowed to play more than half way through or it is advanced past 1/2 way,stop is pushed and it finds the correct parking position without overdriving. Looking at the non-inverse and inverse inputs pins 19 & 21,they are the normal. This servo chip was replaced with no fix. The only other thing I saw was that the Sense input on pin 24 was going to a positive dc level only for the duration of the sled overdrive. This pin outputs FZC,AS,TZP,SSTOP(the limit switch on/off signal detection pin for disc inner periphery detection) and 'Busy Through Command From CPU'. This sense output goes to pin 37 on the main micro and pin 18 of the CXD1135QZ Dig Control IC. Pin 18 of this IC shows that this sense signal is an output from this IC. It uses data from the micro as inputs on pins 13,14,15 which are 'busy' during the overdrive event. As soon as the data stops on these pins,the sled stops driving. This IC also uses an input on pin 17 from the CXA1082BS called CNIN. It is input to pin17 where it goes to a portion labeled Tracking Counter and then onto the CPU Interface block which is the same as previously mentioned,pins 13,14,15,and Sense output,pin 18. Sure seems like a glitch in the data but after going round on this, I can't isolate why this data stream is active and driving the sled too far. These were really rare units and we only sold 2 or three of them so I don't hope for much of a response from this but hey.A man can try. Thanks for taking a look.
  Reply With Quote
Old 11th January 2011, 04:27 AM   #2
singa is offline singa  Singapore
diyAudio Member
Join Date: Apr 2004
Location: near
Send a message via AIM to singa Send a message via MSN to singa Send a message via Yahoo to singa
Hi, Nothing wrong with trying and since a person with your experience and
knowledge can't make any headway,it's best to let go because it's not worth
the time and money.Salvage the tube section ,power transformer and whatever goodies if you're a diyer.Stick to simple business of buy and sell
if you are the boss of the shop. Regards.
  Reply With Quote


Luxman D-105  Sled won't park.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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Luxman Lv-105 Valerio Solid State 81 29th July 2013 01:54 PM
Schematic Luxman CDplayer D 105 zabaltegi Digital Source 5 30th October 2007 03:54 PM
FS: Luxman LV-105 Ron_Phelps Swap Meet 1 16th April 2006 11:35 AM
alpine/luxman LV-105 TonyTecson Solid State 0 13th March 2004 05:54 AM
Luxman LV-105 bra Solid State 1 7th July 2003 07:26 AM

New To Site? Need Help?

All times are GMT. The time now is 08:19 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio