Panasonic SA-PM71SD Micro HiFi - not comming out of standby

[Nevillet]

Hi All,

I have the above mini HiFi that after powering displays the standby LED and when the power switch is pressed the relay momentarily clicks in then cuts out again.

I've included an image of the power board schematic.



There is 5.9V present on pin 4 of CN507 and when the standby button is pressed 2.6V momentarily appears on pin2 of the same connector.

Any thoughts would be welcome.



The service manual exceeds the Badcaps file size limit but it can be found here:

[stj]

Re: Panasonic SA-PM71SD Micro HiFi - not comming out of standby

the first thing to do is look for cracked solder joints on these stupid designs with boards at angles to each other

[Nevillet]

Re: Panasonic SA-PM71SD Micro HiFi - not comming out of standby

I agree it's a horrible design and they are painfull to work on. Saying that all the solder joints look OK and I've reflowed most on the power & amplifier boards but still no further forwards..

[R_J]

Re: Panasonic SA-PM71SD Micro HiFi - not comming out of standby

There is likely a short somewhere off the S3 S4 line, my first guess would be a defective audio output module.