denon amp protection circuit

ronm · 25th March 2004, 03:26 PM

my son spilled a coke into a denon 810 amp. the panel indicates the protection circiut is active. i suspect there is one or more blown output transistor. i need help figuring out which ones. i have the service manual, i can't figure out how the proctection circuit works.

help?

ron

chris ma · 25th March 2004, 03:47 PM

Unless you are very experienced I would recommend this to a certified techie/service. It also depends on how much liquid went in as well. If there is a lot then it may be cheaper to relpace the whole board than the cost of checking each part on the board.

Sorry to hear about the accident.
Chris

PS: Was the amp powered on when it happened. If not then you should not try to turn it on until you have clean the inside and make sure it is dry before power up.

dimitri · 25th March 2004, 04:03 PM

At first put the amp in the bath, put plastic packet on trafo, try to close holes in switches, rotary switches, potentiometers, then wash PCBs carefully with water(shower) and put on your bright Californian sun until it dry. Coke conducts electricity and the protection circuit can sense the dc output. If it willn't work you can contact me.

25th March 2004, 03:26 PM	#1
ronm diyAudio Member Join Date: Mar 2004 Location: california	denon amp protection circuit my son spilled a coke into a denon 810 amp. the panel indicates the protection circiut is active. i suspect there is one or more blown output transistor. i need help figuring out which ones. i have the service manual, i can't figure out how the proctection circuit works. help? ron

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25th March 2004, 03:47 PM	#2
chris ma diyAudio Member Join Date: Sep 2001 Location: Pickering, Canada	Unless you are very experienced I would recommend this to a certified techie/service. It also depends on how much liquid went in as well. If there is a lot then it may be cheaper to relpace the whole board than the cost of checking each part on the board. Sorry to hear about the accident. Chris PS: Was the amp powered on when it happened. If not then you should not try to turn it on until you have clean the inside and make sure it is dry before power up.

25th March 2004, 04:03 PM	#3
dimitri diyAudio Member Join Date: Oct 2002 Location: retired	At first put the amp in the bath, put plastic packet on trafo, try to close holes in switches, rotary switches, potentiometers, then wash PCBs carefully with water(shower) and put on your bright Californian sun until it dry. Coke conducts electricity and the protection circuit can sense the dc output. If it willn't work you can contact me.

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