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.

troubleshooting philips cd650
troubleshooting philips cd650
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 16th December 2005, 11:11 AM   #11
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Send a message via AIM to Luke
cap cant be toast or I got ripped off. Its brand new form a forum member
Im not sure where to look for I2S but I think from datasheets of tda1541 I can figure out if its getting signal.
Thanks guido
  Reply With Quote
Old 1st January 2006, 08:52 AM   #12
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Send a message via AIM to Luke
Hi Guido,

hope you had a good xmas, Ive finally managed some time to get back to this little problem.

Quote:
Not really, that's a +5V supply cap. So maybe it's toast.
I changed the cap and still 3V.


Quote:
Use that scope to see if there is anything going on on the I2S lines towards the 7220 and towards the 1541.
Im not sure what Im looking for here, the pins 3 and 4 of saa7220 is the I2S input from what I can tell.
There is a very high frequency square wave that doesnt change with play/stop sequence.

The pins 15 and 16 on this chip have nothing.

Im picking this chip has gone and dragging the rails down, what u say?

If so, where on earth can I get one of these things?
  Reply With Quote
Old 1st January 2006, 10:08 AM   #13
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
troubleshooting philips cd650 troubleshooting philips cd650
Default philips cd650

I think I have a complete motherboard lying around, (worked ok before it was dismantled).
Let me know if you need it, -or parts.

Arne K
__________________
Don't believe everything you think...
  Reply With Quote
Old 1st January 2006, 04:29 PM   #14
guido is offline guido  Netherlands
diyAudio Member
 
guido's Avatar
 
Join Date: Mar 2002
Location: diepe zuiden
Quote:
Originally posted by Luke
Hi Guido,

Im not sure what Im looking for here, the pins 3 and 4 of saa7220 is the I2S input from what I can tell.

1,2,3 actually

There is a very high frequency square wave that doesnt change with play/stop sequence.

on 1 and 2 ?

The pins 15 and 16 on this chip have nothing.

bad.

Im picking this chip has gone and dragging the rails down, what u say?

If so, where on earth can I get one of these things?
Maybe, but if i had to guess it is the tda1541 pulling down the i2s out of the 7220 and also the powersupply) the 7220 still provides the system clock on pen 9 to the 7210, otherwise the i2s in would not have a signal. Or maybe it is partly broken.

Take out the i2s conntection to the dac (15,16,18) and have another look. Think there are some wires near the dac which you can take out (to pen 1,2/4,3).

If that does not help the 7220 is toast. They do breake down, one in my cd80 died. As for replacements, in this parts of the woods it is easy. cdm2/1541 players for 15 euro's everywhere...
__________________
GuidoB
  Reply With Quote
Old 12th January 2006, 07:28 AM   #15
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Send a message via AIM to Luke
Wow this is annoying!
Arne thankyou very much for the saa7220, but sadly it is toast.(alot of toast in this pig).

Guido,

Im getting confused.
Quote:
Take out the i2s conntection to the dac (15,16,18) and have another look.
You mean on the saa7220 right? I thought there are only two I2S connections in saa72202 to tda1541, pins 15 and 16? What is pin 18 for? Maybe I am doing something wrong and thats why I cant see any I2S?

I changed the tda1451a with the original tda1541 which was working and still nothing.

Help please

regards Arthur
  Reply With Quote
Old 12th January 2006, 08:06 AM   #16
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
troubleshooting philips cd650 troubleshooting philips cd650
Default Too bad

will have to send you a new then...

Arne K
__________________
Don't believe everything you think...
  Reply With Quote
Old 12th January 2006, 08:58 AM   #17
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Send a message via AIM to Luke
Hi Arne,

very kind of you Ill post you some funds for postage, that seems only fair.
The disc just spins with this chip in it wont read the disc. The old chip reads the tracks fine. Im wondering if its something upstream, maybe the signal isnt getting to the saa7220? Im not sure what Im loking for on the scope. However, my engineers intuition(which has failed me from time to time) is telling me saa7220.
  Reply With Quote
Old 12th January 2006, 09:04 PM   #18
guido is offline guido  Netherlands
diyAudio Member
 
guido's Avatar
 
Join Date: Mar 2002
Location: diepe zuiden
Quote:
Originally posted by Luke
Wow this is annoying!
Arne thankyou very much for the saa7220, but sadly it is toast.(alot of toast in this pig).

Guido,

Im getting confused.


You mean on the saa7220 right? I thought there are only two I2S connections in saa72202 to tda1541, pins 15 and 16? What is pin 18 for? Maybe I am doing something wrong and thats why I cant see any I2S?

I changed the tda1451a with the original tda1541 which was working and still nothing.

Help please

regards Arthur
Yes at the 7220. i2s is three lines. the player does not need a tda1541 to work. It does need the 7220 for the clock generation to the 7210 and the 7210 itself. If you take out the 1541 and put nothing in return, you leave the opamp input pens floating.
They dont like that and take down the powersupply

So take out the 1541 and connect pen 6 and 25 (outputs) to ground for a moment to connect the opamp input's to ground.

Then try to get the player working with just 7210/7220 (without sound obviously). If you have that working, check the powersupply pens of the dac for the correct voltages and put a working 1541 in there. That should fix it.
__________________
GuidoB
  Reply With Quote
Old 13th January 2006, 12:28 AM   #19
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Send a message via AIM to Luke
Hi Guido,

thanks will try that. Just confirm that "pens" = "pins"

regards Arthur
  Reply With Quote
Old 13th January 2006, 12:43 AM   #20
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
troubleshooting philips cd650 troubleshooting philips cd650
Quote:
Originally posted by Luke

The disc just spins with this chip in it wont read the disc.
Does it spin at a normal speed? Or fast(er)?
Sounds like a failing clock...?

Arne K
__________________
Don't believe everything you think...
  Reply With Quote

Reply


troubleshooting philips cd650Hide 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
Philips CD650 mods SimontY Digital Source 1095 19th October 2014 04:05 PM
Philips CD650 carlosfm Digital Source 35 16th May 2009 12:41 PM
philips cd650 problem kaulagalvis Digital Source 1 13th July 2007 05:46 PM
Help ! Philips CD650 in trouble kiwi_guy Digital Source 2 2nd April 2007 10:07 AM
Problems with Philips CD650 Skorpio Digital Source 2 19th February 2007 11:01 AM


New To Site? Need Help?

All times are GMT. The time now is 01:11 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
Wiki