DAC not working after polarity change by mistake

[amit11]

Hi FMs,

By mistake when connecting 12v power supply to my DAC, i reversed the polarity.

Now my dac is not powering on.

Regards,
amit.

 

[OM_2K19]

You might have smoked it. Not sure if this unit has a protection diode in its DC path to protect against reverse polarity.

 

[amit11]

You might have smoked it. Not sure if this unit has a protection diode in its DC path to protect against reverse polarity.

On visibility i could not find any particular damage.
I also removed one silver capacitor near to DC jack. It was showing shorted in multometer (before removing). So i thought it would be the culprit and removed it.
But again same problem. Some short is somewhere.

 

[amit11]

You might have smoked it. Not sure if this unit has a protection diode in its DC path to protect against reverse polarity.

Thanks a lot.
After few days of testing with multimeter, the short was found and it was the diode which you mentioned. I removed the diode and now it is back working.