Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Post Reply
 
LinkBack Thread Tools Display Modes
Old 07-24-2013, 08:25 AM   #1
Registered User
 
chipmunk's Avatar
 
Join Date: Jul 2013
Location: Kent, United Kingdom
Posts: 84
Garage
Intermittent CDR-23 Amp problem fixed

Reposted as it was hidden in my original listing

Something that may help all you folks out there who are having intermittent problems with your CDR-23 Systems.

When for the 3rd time, my RH channel stopped working, I decided to take out the amp and see whether I could fix it. On opening it up I found a number of dry solder joints - this is where (usually through heat) the solder around the component wire has cracked.

I got out my trusty Weller solder station and soldered up all the joints that looked suspect. Hey presto - amp working perfectly again.

It's my guess that the power transistors get quite hot and over time bad connections will develop.

Let me know if this works for you.

__________________
2003 Boxster S
chipmunk is offline   Reply With Quote
Old 07-24-2013, 10:49 AM   #2
Registered User
 
Join Date: Jun 2007
Location: Maryland
Posts: 240
I believe I have the same symptoms you described.

Thanks for posting!
Wret is offline   Reply With Quote
Old 07-24-2013, 11:01 AM   #3
Registered User
 
chipmunk's Avatar
 
Join Date: Jul 2013
Location: Kent, United Kingdom
Posts: 84
Garage
Excellent. Hope it helps. Pity you aren't a little closer or you could have popped around.

Inside there is a metal shielding box (covers both side of the circuit board). It's worth removing this carefully, including the internal heat sink that is stuck to the inside of one of the shield covers and replacing the thermal grease to ensure that you have optimal cooling. Thermal grease can be bought from any electrnic shop of from ebay (see link below).

Silver Thermal Compound Grease Paste CPU Heatsink RROD | eBay

Let me know if you need any help.
__________________
2003 Boxster S
chipmunk is offline   Reply With Quote
Old 07-24-2013, 12:14 PM   #4
Registered User
 
Join Date: Jul 2013
Location: Montreal QC Canada
Posts: 222
I have same intermittent problems ! Reading your thread I hoped I had the same but nothing wrong when amps comes opened...
__________________
2003 Boxster S
The French Dude is offline   Reply With Quote
Old 07-24-2013, 02:44 PM   #5
Registered User
 
chipmunk's Avatar
 
Join Date: Jul 2013
Location: Kent, United Kingdom
Posts: 84
Garage
French Dude, what do you mean that nothing was wrong? You can't see a dry joint unless you look closely and even then you might miss it. What you need to do is to resolder (carefully not to overheat the transistors and capacitors) all the major joints you can see and then try it again. Intermittent problems are often caused by bad connections that expand and contract with heat.
__________________
2003 Boxster S
chipmunk is offline   Reply With Quote
Old 08-02-2013, 02:13 PM   #6
Registered User
 
Join Date: Jul 2013
Location: Montreal QC Canada
Posts: 222
Ah ok Chipmunk ! Thank you for information !
But strangely, when I wired the amp in the car I tested the sound and nothings wrong... knock on wood. If mess come again I will do what you tell me !

__________________
2003 Boxster S
The French Dude is offline   Reply With Quote
Post Reply


Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 09:31 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page