Philips CD104 tweaks - Page 41 - 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 25th February 2007, 04:10 PM   #401
diyAudio Member
 
Join Date: Feb 2004
Location: GTA
I've read through the majority of this thread, and don't recall anyone having tried this idea. Would it be possible to bypass the output stage in these players as was done with the Sony PS1 or the Toshiba SD3950/60?
  Reply With Quote
Old 25th February 2007, 04:36 PM   #402
poynton is offline poynton  United Kingdom
diyAudio Member
 
poynton's Avatar
 
Join Date: Mar 2005
Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
Quote:
Originally posted by mrskinny
..................... Would it be possible to bypass the output stage in these players as was done with the Sony PS1 or the Toshiba SD3950/60?
I, for one, am not sure what you mean.
Do you mean to take the output direct from the DAC out ??

Andy
__________________
If it ain't broke, break it !! Then fix it again. It's called DIY !
  Reply With Quote
Old 25th February 2007, 04:57 PM   #403
diyAudio Member
 
Join Date: Feb 2004
Location: GTA
Yes, that's what I meant. I'm not sure if the DACs would provide enough output voltage on their own without the opamps for this to work.
  Reply With Quote
Old 25th February 2007, 05:14 PM   #404
poynton is offline poynton  United Kingdom
diyAudio Member
 
poynton's Avatar
 
Join Date: Mar 2005
Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
Quote:
Originally posted by mrskinny
Yes, that's what I meant. I'm not sure if the DACs would provide enough output voltage on their own without the opamps for this to work.
The TDA1540 DAC chips require an i/v stage of some sort.

A tube i/v stage was tried earlier in the thread by JEROENR but I do not know what stage it is at !!!

Andy
__________________
If it ain't broke, break it !! Then fix it again. It's called DIY !
  Reply With Quote
Old 5th March 2007, 05:29 PM   #405
diyAudio Member
 
Join Date: Apr 2005
Location: Xyber
hi ,
found another way to add an extra transformer .just to power analog stage only.
Attached Images
File Type: jpg cimg0579.jpg (97.4 KB, 914 views)
  Reply With Quote
Old 6th March 2007, 08:13 AM   #406
simonov is offline simonov  Bulgaria
diyAudio Member
 
simonov's Avatar
 
Join Date: Aug 2005
Location: PZ
Quite a good idea

This perfoboard is the PSU's filter right? Is it going to be inside the player or outside?
  Reply With Quote
Old 6th March 2007, 06:35 PM   #407
diyAudio Member
 
Join Date: Apr 2005
Location: Xyber
Quote:
Originally posted by simonov
Quite a good idea

This perfoboard is the PSU's filter right? Is it going to be inside the player or outside?
thanks !
no ..tats the discrete 4 transistor output stage..the Psu diode & filter located just behind the cdm transport..+-18volts adj regulator on the big heatsink..
  Reply With Quote
Old 7th March 2007, 08:21 AM   #408
simonov is offline simonov  Bulgaria
diyAudio Member
 
simonov's Avatar
 
Join Date: Aug 2005
Location: PZ
Hi Richardgreat
About that discrete I/V stage. I have a question. Does it still need the standard low pass filter at the output, generally used in the opamp stages?

Regards:
Venci
  Reply With Quote
Old 22nd March 2007, 12:03 PM   #409
simonov is offline simonov  Bulgaria
diyAudio Member
 
simonov's Avatar
 
Join Date: Aug 2005
Location: PZ
And just one more question. Yesterday a played a little with my CD582 and made the non oversampling mode. I found this to be quite a good improvement to the sound. Is it possible to do the same with my CD104? In general is it possible to run the TDA1540 at 0 x oversampling?


Regards:
Venci
  Reply With Quote
Old 2nd May 2007, 11:46 AM   #410
jsuen is offline jsuen  Hong Kong
diyAudio Member
 
Join Date: Sep 2003
Location: Hong Kong
Send a message via AIM to jsuen Send a message via MSN to jsuen Send a message via Yahoo to jsuen
Default requesting serive manual

Hi all,

I finally dig up my CD104 player from my storage room. I bought it from e-bay several years ago, the seller claimed that it worked OK. When I got it, I noticed there was no sound from one of the channel but it played CD alright. Now, I power it on but the error led lights up. No sound! I read through all 41 pages of this thread and take notes. I also download the service manual from the web but later find out that the manual is incomplete. So if anyone has a complete service manual for CD104, would you mind sending it to me? My e-mail address is gundam083hk (AT) yahoo (dot) com

Thanks.

Johnny
  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
Philips CD104 Bob Roberts Digital Source 14 24th September 2004 03:25 PM


New To Site? Need Help?

All times are GMT. The time now is 09:31 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