Sony CMT-SPZ90DB Sound output problem

[spike47]

Hi

I have a Sony CMT-SPZ90DB and there is a problem were there is only sound when I use the headphones, no sound out of the speakers !, any idea what the problem could be ?.



cheers

Spike

 

[muljao]

Most systems cut off speaker sound when headphones are plugged in

 

[gibbsy]

It's a standard set up certainly on all the stereo amps and AV amps with a headphone circuit that I've owned. Not a fault with your Sony.

 

[spike47]

Hi Guys
Thanks for your reply, it only has sound when I plug the headphones in, no sound out of speakers when the headphones are dissconnected !.
cheers
Spike

 

[spike47]

SM for it, just got it now, bit late now will have a look tomorrow.
cheers
Spike

 

[Khazul]

Could be any number of things. C heck the speaker wiring for shorts (stray wires) that may trigger protection. Otherwise could be a problem with the PSU to the power amp stage, or power amp chip died etc...

Unless something trivial, probably not worth fixing. I had an old Sony HT+DVD system blow up (literally load pop and smoke) a few years back - a quick look inside and even with my electronic background - just not worth bothering to try to fix - Sony specific parts, specialized tools needed for soldering SMT part etc and even if I could get the parts (if still even available), cost would have almost paid for a minimal budget AVR on sale etc.

Easiest fix may be buying a second hand unit damaged unit and transferring working work, but likely a damaged unit probably has the same problem.

 

[spike47]

Could be any number of things. C heck the speaker wiring for shorts (stray wires) that may trigger protection. Otherwise could be a problem with the PSU to the power amp stage, or power amp chip died etc...

Unless something trivial, probably not worth fixing. I had an old Sony HT+DVD system blow up (literally load pop and smoke) a few years back - a quick look inside and even with my electronic background - just not worth bothering to try to fix - Sony specific parts, specialized tools needed for soldering SMT part etc and even if I could get the parts (if still even available), cost would have almost paid for a minimal budget AVR on sale etc.

Easiest fix may be buying a second hand unit damaged unit and transferring working work, but likely a damaged unit probably has the same problem.

Hi
Thanks for your reply, I just thought with the ear phones working there wouldn’t be much wrong with it, although when I opened it up, there seems to be a lot more in itthan other Mini Hi-Fi units I have opened up , I will have a look around and see if there is something to be done !.
cheers
Spike

 

[spike47]

Amp board, anything on this to check, is there a protection part on there to check for blown ?.

cheers
Spike

 

[spike47]

4 Brown parts are 9 Z65-105 , the 4 grey parts are ( C100-YS ) have no idea what the latter is !, is there a component on there that would act has a protection/overload ?, there is 2 components top right marked (MF) have no idea also what they are .

 

[spike47]

Hi
All sorted now, there was a factory reset sequence that I have managed to find and all is working good, I am a very happy person today, thanks for all your replies .

cheers
Spike