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 September 2010, 04:52 PM   #21
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by Audioenthusiastic View Post
Hi tiefbassuebertr,

I can bring you some clarifications about a few various mechanisms/modules you mentioned:

VAM1201/VAM1202: the VAM1201 had been officially discontinued a long time ago. The VAM1202 had been officialy discontinued a few years ago. It might be possible to find some copy of these mechanisms with very poor performances in terms of reliability compared to the original mechanisms.

VAM1210: there is no VAM1210: you probably refer to the L1210, a complete module (loader+ servo board without DAC section) that makes use of the VAM1202: Officialy discontinued

VAM1250: Philips mechanism which is still in production (look at the latest Vincent CD player)

VAM1205: as far as I know, it had been discontinued a while ago

VAU1252 = CD-Pro, previous version of the CD-Pro2LF (VAU1254/31LF)

CD-Pro, CD-Pro2, CD-Pro2M, CD-Pro2LF/ All the pevious version of the CD-Pro. The latest version is the CD-Pro2LF and is still in production and used by many manufacturers. You can have a look to this link to check the history of this module:
FAQ


I hope it is helpful for you
Thank you for this informations. Now for me the question is, which company produce the VAM1250 and the CD-Pro2LF. If I know this, I can ask there, where selling this company the hologram diode successors from Sharp, that must be automaticlly also still in production (but not by Sharp).
The reason to start this thread was actually the fact, that I get still poor quality concerning CDM12.4 heads (RF-unit TDA1302 integrated) (China copy). If I would get top quality hologram laser diodes in TO-outline, all problems are away for me.
Unfortunately VAM1250 and CD-Pro2LF uses by their laser heads TZA versions (CDRW compatible RF amps). Therefore it is not compatible.
  Reply With Quote
Old 27th September 2010, 11:45 AM   #22
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by tiefbassuebertr View Post
about the URL
Google Nachricht
original URL:
http_www_diyplus.net/phpBB3/viewtopic.php?f=3&t=576&start=40
[B][U]

the mentioned URL
http_www_diyplus.net/phpBB3/viewtopic.php?f=3&t=576&start=40
from post 8 is death. The new URL must be
图解CDpro以及CDM12系列激光头中的全息激光管 中国DIY俱乐部

I still hope to get informations about the currently manufacturer of the successor typ from Sharp's LTOH30PA. The CDpro2LF is still in production. Thus also hologram laser diodes must be in production. I am surpriced, how hard to find out it is despite this and various other threads here arround this matter. Where are the experts from Japan, China, Korea, Taiwan and Hongkong?
Especially the suppliers of spare parts from this countries must actually find out this very easy.

Last edited by tiefbassuebertr; 27th September 2010 at 11:54 AM.
  Reply With Quote
Old 31st December 2010, 09:14 AM   #23
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Who can start this topic of this thread about follow threads ?
中国DIY俱乐部 - Powered by VeryCMS
HIFIDIY论坛 - Powered by Discuz!
「「DIYPlus「「
HKDG - Powered by Discuz!
If this is done, I am sure to get most of the wanted informations.
  Reply With Quote
Old 6th January 2011, 07:22 PM   #24
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default Most Sharp Hologram Devices in this Online Overview

I have found an URL consist of 36 pages about vintage Sharp optical devices and HF/RF modules
Sharp Electrionic Components electronic components, download datasheet | HTML.datasheet
Only the LTOH30/LToH30 series unfortunately not listed. Maybe cause special made for CDM12/VAM12xx ??
All hologram laser diode devices obsolete by Sharp. Who is the successor manufacturer?

Last edited by tiefbassuebertr; 6th January 2011 at 07:24 PM.
  Reply With Quote
Old 13th January 2011, 10:20 AM   #25
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Any experiences about this supplier ??
HK LRF COMPONENTS INC LTD
Phone: 86-755-8398 6170 86-755-8398 0086
Fax : 86-755-8398 6172
Email:fenny@lrfcomponents.com
MSN:lrffenny@hotmail.com ICQ:636560389
LRF | Home
  Reply With Quote
Old 24th February 2011, 07:29 PM   #26
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
any news ??
  Reply With Quote
Old 25th February 2011, 07:58 PM   #27
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default Different Sharp's LDGU (hologram Laser Diode) Types - LTOH30PA vs. LTOH30PF

For Sharp's LDGU devices LT0H30PA and. LT0H30PF there still isn't find a data sheet.
But about
http://contents.driverguide.com/cont...ath=README.TXT
I read follow:

4.2 LASER DIODE INFORMATION
4.2.1 Laser: Semiconductor Laser, 3 Beam type,
LDGU-Sharp, LTOH30PA for max. 16x speed
4.2.2 Wavelength 780nm typ.
4.4 SUPPORTED DISC FORMAT:
CD-DA, CD-ROM, CD-ROM XA, CD-R, VCD, CD-I, PHOTO CD,
I-TRAX Enhanced CD, CD Extra, Mixed Mode CD & Bootable CD-ROM.


and about
http://contents.driverguide.com/cont...ath=README.TXT
I read follow:

4.2 LASER DIODE INFORMATION
4.2.1 Laser: Semiconductor Laser, 3 Beam type,
LDGU-Sharp, LTOH30PF for max 24x speed
4.2.2 Wavelength 780nm typ.
4.2.3 Output Power 0.2 ~ 0.3 mm continuous wave.
4.4 SUPPORTED DISC FORMAT
CD-DA, CD-ROM, CD-ROM XA, CD-R, VCD, CD-I, PHOTO CD,
I-TRAX Enhanced CD, CD Extra, Mixed Mode CD & Bootable CD-ROM.


This means, that the only different between this two hologram laser diodes obviously must be the max possible speed suitability.
Who knows, from which pc cd-rom drive type/model comes this datasheets?

Last edited by tiefbassuebertr; 25th February 2011 at 08:03 PM.
  Reply With Quote
Old 28th March 2011, 05:53 PM   #28
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
any news concerning currently manufacturers?
  Reply With Quote
Old 26th April 2011, 09:38 PM   #29
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
in the attachement the Sharp diodes, from that I need the currently available successor devices in the same outline
Attached Images
File Type: jpg LT0H30PA sharp logo on bulk L.Hang.JPG (376.5 KB, 222 views)
File Type: jpg LT0H30PA=30PAH2ST bottom Ling Hang.JPG (101.3 KB, 218 views)
File Type: jpg LT0H30PA=30PAH2ST top Ling Hang.JPG (112.7 KB, 216 views)
Attached Files
File Type: pdf SHARP LTOH30A_P.pdf (173.9 KB, 28 views)
  Reply With Quote
Old 27th June 2011, 02:27 PM   #30
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
I bought a couple of VAL1250 units from early Philips production series (remaining stock) for remove the Sharp hologram laser tubes (for replace in CDM12.4 heads of various cd player models, because the usually available replacement CDM12.4 laser heads mostly have very bad quality).
This work is considerably more complicated cause additional mechanical and electrical adjustments of the LDGU, but in the moment the only possibility for the customers with faulty CDM12.4 heads - check the pictures there:
Stripdown/Clean of CDM12.4

In most cases the Hologram Laser diodes works fine and very reliable with no interruptions (as it should be), but in any few cases are temperature-dependent dropouts are to observe (by breakdown of RF-signal at the same time) above arround 28 degrees Celsius. One can very clearly see the collapse of the RF signal from 1 Vpp to approximately 100mVss.
If the ambient temperature is below 28 degrees Celsius, a perfect playback of CD's without dropouts is possible.

The effect is independent of the manufacturer of the CD player - I watched it on certain models of Thule Audio, Primare, Cyrus, NAD, T + A and Quad - all models where I replace resurrect CDM12.4 heads (old heads with new equipped VAL1250 hologram laser diodes).

What is the reason for this ??
Was the reliability even by the original Sharp hologram diodes not at highest level
(please note, the costs of the VAL1250 head are arround 120 euros) ??

Last edited by tiefbassuebertr; 27th June 2011 at 02:34 PM.
  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
FS: Brand New CDM12 Industrial !!! cartman Swap Meet 6 12th January 2010 06:42 PM
Philips CDM 9 Pro mech for sale. Triophile Swap Meet 3 11th September 2009 07:23 PM
Sony Laser Mech..Arcam Rare Bird Digital Source 6 25th September 2008 12:43 PM
Help re laser and mech Rotel cd971 HCB Digital Source 13 22nd September 2007 07:04 AM
Replacing the laser in a Philips CDM12.4/05 Phasenoise Digital Source 2 28th August 2007 02:51 PM


New To Site? Need Help?

All times are GMT. The time now is 06:02 AM.


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