CDX no sound -griplets?

17 replies
GA
Offline
Garten47
Bronze
Posted November 15, 2015 at 20:18 GMT
#2203452

Hi all,

Had my CDX suddenly stop outputting sound, everything is normal as before, spinning, lid, changing tracks...all is fine... just no goddam sound...

Did the regular forum searches and seems the via's (griplets) are the usual suspects for motor/spining problems,.. but as the servo pcb isn't involved in sound output, could it be as easy as griplest on the decoder board?

I read that there was a muting relay that could also be problematic? (like the beocenter 9500?) could I diagnose that in any non destructive way?

I know I can just open it up and sort the via's as a first measure...but i'd like to get some advice on alternate diagnosis before i heat up the ol' iron. ....decoder PCB caps?..or would they cause bad sound.,, and not my situation, which is NO sound whatsoever...

many thanks

/g

L(
Offline
leeshep (archived2)
Bronze
Posted November 15, 2015 at 21:27 GMT
#2203453
This post seems to have a few suggestions. The muting relay could well be the issue.

/forum/general-discussion-and-questions/beogram-cdx
C(
Offline
chartz (archived2)
Bronze
Posted November 15, 2015 at 21:44 GMT
#2203454

Yes, the muting reed relay itself or its solder joints is the first thing to check. 

Not doing the vias is calling for trouble anyway, so do that too to avoid future problems.

GA
Offline
Garten47
Bronze
Posted November 21, 2015 at 15:13 GMT
#2203455

Worked on the said griplets with wire and iron on the decoder PCB only, BAM! sound again!!

Couldn't find the reed relay...but as further analysis wasn't needed I will now sit back and enjoy with my 1974 Beomaster 2000, match made in heaven!

Many thanks you all!, here are some pics!

 

 

 

GA
Offline
Garten47
Bronze
Posted November 21, 2015 at 15:14 GMT
#2203456

 

 

 

 

 

 

S(
Offline
smokinglegges (archived2)
Bronze
Posted December 31, 2018 at 18:41 GMT
#2203457

Hi,

I had this exact same problem and shelved my CDX for years until I read this. Did the same, just heated up the giblets. Then no sound on one channel. I had crimped the output wire in putting it back together. Re and re and it sounds incredible. Thank you so much for this post, I am one happy guy. Still use the same system I purchased in 1985.  

B(
Offline
Blaing (archived2)
Bronze
Posted October 13, 2019 at 18:53 GMT
#2203458

Did that work for resolving your “no audio” issue? I’m having the exact same problem. How difficult was it to replace them yourself?

B(
Offline
beonix (archived2)
Bronze
Posted October 13, 2019 at 20:32 GMT
#2203459

to be absolutely honest, I simply bridged the relay contacts on the muting relays...

BR
Offline
brianlaing
Gold
Posted October 18, 2019 at 17:20 GMT
#2203460

Then you didn't replace the reed switches? Is there any effect from the relay contacts being bridged?

Would you still recommend Farnell type 240-9213 glass reed switches if I were to do that?

DI
Offline
Dillen
BronzeModeratorFounder
Posted October 19, 2019 at 07:43 GMT
#2203461

The relays are there to prevent noise in standby.
In some decks they are also used to prevent "unpredictable audio signals" going to the amplifier while reading TOC etc.

Why bodge it like that? - Why not just do a proper repair and replace the reed elements?

Martin

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