low volume outpout

[testament999]

good day i have this amp. of mine it used to work just fine.but suddenly the output volume became so low.
what is the problem?? what part of the amp is broke?

[Mick Bailey]

Hi and welcome.

What is the make and model?

[testament999]

its a sony stereo mhc-dx5 amp

[Jazz P Bass]

Good luck with the problem being isolated to 'one part'.



These 'mini hi fi's' are a real hoot to get apart.

If both channels are low in volume, it may be a simple power supply issue, which would involve testing each of the power rails.

The output ic is a STK402 brick. One per channel.

The service manual can be found here:
http://archivos.diagramas.mx/audio/H...0DX5J%20sm.pdf

[testament999]

yes both of the channels volume is low

[drewl]

Lets start simple.
Do the headphones work?
The headphone jack mutes power to the speakers. A bad jack could cause the problem.
Have you tried other speakers?
They could be blown.

[testament999]

headphones volume is low too
and no i didnt try other speakers