Fender Passport Pa goes into protect

scottyd · 8th April 2007, 03:52 AM

SO the band Im in have been using this little Fender Passport PA for practice with good results until recently it stopped working.
When powered on the protect light just lights up and no sound comes out. It does this with nothing plugged in as well (speakers mics). What would be a good starting point to try and repair it?
Thanks!

Nigel Goodwin · 8th April 2007, 02:53 PM

Measure the voltage on the output of the amplifier (before the relay), this should be zero volts, I suspect it's not - and the amplifier has 'blown' - and will require transistors replacing.

John Audio · 21st April 2007, 03:21 PM

This product has a switched mode PSU - which will probably be the cause of the fault.........

8th April 2007, 03:52 AM	#1
scottyd diyAudio Member Join Date: Jan 2007 Location: Tx	Fender Passport Pa goes into protect SO the band Im in have been using this little Fender Passport PA for practice with good results until recently it stopped working. When powered on the protect light just lights up and no sound comes out. It does this with nothing plugged in as well (speakers mics). What would be a good starting point to try and repair it? Thanks! __________________ Easy Does It!

8th April 2007, 02:53 PM	#2
Nigel Goodwin diyAudio Member Join Date: Jul 2005 Location: North Derbyshire	Measure the voltage on the output of the amplifier (before the relay), this should be zero volts, I suspect it's not - and the amplifier has 'blown' - and will require transistors replacing. __________________ Nigel Goodwin

21st April 2007, 03:21 PM	#3
John Audio diyAudio Member Join Date: Mar 2003 Location: Exeter	This product has a switched mode PSU - which will probably be the cause of the fault......... __________________ John Audio

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