PV2600 - one channel dead

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   Hi all
Got a PV2600, one channel isn't working as it should. Symptoms below:

Both green channel lights are on, signal light only comes on for working channel
Sound from working channel, only the faintest whisper out of the duff channel
no fault lights on
I've got a scope and multimeter, and know a middling amount about electronics - anyone point me in the right direction for diagnosing the above?

Thanks!

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Zik Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 20 June 2017 Status: Offline Points: 20	Post Options Post Reply Quote Zik Report Post Thanks(0) Quote Reply Topic: PV2600 - one channel dead Posted: 05 March 2018 at 1:51pm
	Hi all Got a PV2600, one channel isn't working as it should. Symptoms below: Both green channel lights are on, signal light only comes on for working channel Sound from working channel, only the faintest whisper out of the duff channel no fault lights on I've got a scope and multimeter, and know a middling amount about electronics - anyone point me in the right direction for diagnosing the above? Thanks!

njw Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 26 March 2010 Location: S. Wales Status: Offline Points: 2700	Post Options Post Reply Quote njw Report Post Thanks(0) Quote Reply Posted: 05 March 2018 at 9:25pm
	Does it work in bridge mode?

Earplug Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7752	Post Options Post Reply Quote Earplug Report Post Thanks(0) Quote Reply Posted: 06 March 2018 at 12:35pm
	Check the voltage on the input board, ie make sure that the ic´s are getting the correct rails. If ok, then inject signal and try tracing the path. Maybe one of the input opamps down?
	Earplugs Are For Wimps!

Zik Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 20 June 2017 Status: Offline Points: 20	Post Options Post Reply Quote Zik Report Post Thanks(0) Quote Reply Posted: 06 March 2018 at 1:21pm
	Chasing an input signal was my first thought - strangely the amp has fixed itself but next time the problem shows up that will be my first port of call. Maybe a loose connection to the input board?

Earplug Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7752	Post Options Post Reply Quote Earplug Report Post Thanks(0) Quote Reply Posted: 06 March 2018 at 4:48pm
	"fixed itself" Now, that would have me even more worried! Sure to fail again at the most inconvenient moment. Could be loose connector, bad solder joint, etc, etc. Do the tracing thing - and tap around the board with a something non-conductive to see if the fault appears again.
	Earplugs Are For Wimps!

Zik Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 20 June 2017 Status: Offline Points: 20	Post Options Post Reply Quote Zik Report Post Thanks(0) Quote Reply Posted: 07 March 2018 at 1:20pm
	You're dead right - will attack it over the weekend. Also planning a stress test which will no doubt amuse my neighbours

Elliot Thompson Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5365	Post Options Post Reply Quote Elliot Thompson Report Post Thanks(0) Quote Reply Posted: 08 March 2018 at 10:18am
	Make sure you have the proper current available for the PV 2600 will not deliver its power if the voltage is too low. Best Regards,
	Elliot Thompson