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.

Laser Adjustments: KSS-151A in TEAC VRDS-10 vs TASCAM CD-401 MkII
Laser Adjustments: KSS-151A in TEAC VRDS-10 vs TASCAM CD-401 MkII
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 20th April 2019, 04:29 PM   #1
Malefoda is offline Malefoda  France
diyAudio Member
Malefoda's Avatar
Join Date: Jun 2006
Send a message via MSN to Malefoda
Default Laser Adjustments: KSS-151A in TEAC VRDS-10 vs TASCAM CD-401 MkII

Hi guys,

I adjusted my VRDS-10 years ago and it still works flawlessly.
Owner of a spare player, a TASCAM CD-401 Mk II with a KSS-151A laser, I've looked for the FSM in vain. I've decided to use the VRDS-10 FSM, as the servo circuit seems to be the same. ICs and TP are the same.

All the adjustments can be done properly, they all match and behaviour like in the VRDS-10 but the Focus Gain only. Tracking Gain is fine.
When OK, the signals measured from the player are -90 phase shift. Sounds a bit odd as in the FSM just say a "phase is 90" but works fine, guess they want a 90 between and that's all.
But no way for the FG in the TASCAM, 90 can be achieved by the pot turned in full, nonsense for a pot, and then the player is noisier than a jet plane but works fine anyway. That's not the proper adjustment. The only way to get it at the point it just become silent is when I look for a 45 phase shift. Or said in another way, somewhere with the pot closer to the middle, if I choose 45 (a pure guess) then it's quite silent and works fine. A tad "less" pot turning and it becomes noisy (one can hear the sine wave injected), a bit "more" and it will spins like crazy.

FSM, tech tips or experience to share anyone?

edit: I have played with toys and once things went right, don't know why, maybe the signal gen (cheap eBay thing), maybe the player (setting or such with power on/off?) maybe the scope... user!
If any idea I'll have a look, else I'll check again to see what (who) went wrong and that's it
Attached Images
File Type: png Capture décran 2019-04-20 à 17.45.05.png (82.3 KB, 40 views)
Thorens TD-318/Ortofon Super OM 20, Teac VRDS-10, Buffalo II/NTD1, Allo DigiOne/Moode, UcD400, JBL 4313Ti

Last edited by Malefoda; 20th April 2019 at 05:40 PM.
  Reply With Quote


Laser Adjustments: KSS-151A in TEAC VRDS-10 vs TASCAM CD-401 MkIIHide 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
Wadia 8 VRDS Sony KSS-151A Laser parameters zabrzeski Digital Source 9 9th March 2019 09:24 AM
TEAC VRDS-T1 Laser replacement HELP NEEDED!! vodz Everything Else 7 4th April 2011 11:48 PM
Laser replacement for TEAC VRDS 10 Pani Digital Source 1 20th July 2009 12:18 PM
Replacing the laser assembly (KSS-151A) on a VRDS-10 DavidY80 Digital Source 2 25th August 2004 12:27 PM
Teac VRDS-7 Laser Diode Check coliny Digital Source 2 4th February 2004 09:49 AM

New To Site? Need Help?

All times are GMT. The time now is 11:25 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio