On Saturday, March 23, 2013 11:28:59 PM UTC-5, WLD_Bill wrote:
Pressed power button, unit powers off after 3 seconds.



Bypassed protection mode by holding "Effect" & "Night" buttons while

pressing power button.

Unit displayed the code "PRD PRT 210"



Manual states as follows....



When there is a history of protection function due to abnormal DC

output



PRD PRT:xxx (xxx AD value when the protection function is working)



Cause: DC output of the power amplifier is abnormal.



Supplementary information:

The protection function worked due to a DC voltage appearing at the

speaker terminal.

A cause could be a defect in the amplifier.

If the power is turned on with the abnormality unsolved, the

protection function works in about 3 seconds to turn

off the power.



Ideas where to start? LOL.... DC voltage appearing at the speaker

terminal? None showed

up with a DVM

Checked Q119 (2n5551c) with dvm. I checked ok.