Question about Sherwood R-945 Receiver

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What is an output transistor?

My p-965 shuts itself off after 3 secs

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Output tranisister is the transister that give the finial output of sound.
some use a output IC for the same purpose.

Posted on Sep 03, 2008

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1 Answer

Reciever shuts down by itself


Hi, i have similar/same problem, on initial power on, you have after 3 -4 secs an audible click from inside and all is good... if you then try to change inputs either via front panel and or remote, the unit switches off. if you change input prior to audible click, ie within 2-3 secs of power on , all is good and amp works fine, until you change input etc...very painful fault.. i thought it is sensing /checking the speaker outputs and detecting short etc ,so powering off to protect.. but then just my thought, i suspect something else, if anyone has the fix and can repair , please let me know.

Dec 24, 2009 | Yamaha RX-V800 Receiver

1 Answer

My receiver shuts down frequently , wakes back after 2 or 3 sec .


do you have sufficient space around the unit? If it is in an enclosed space, has other components on top, etc, you may be overheating the receiver. Once it gets too hot it can potentially cause the issues you mention above.

If you have other components on top, try moving them to another shelf or below the receiver, and if you have a door on an entertainment center, leave the door open to help with air flow.

Jul 29, 2009 | Yamaha RX-V663 Receiver

2 Answers

No power


disconnect everything from the unit and see if it still does it.
if it does i would check the output transistor (ic).

Jan 25, 2008 | Sherwood R-945 Receiver

1 Answer

Power shuts off after 2 or 3 sec.


please remove all speaker from receiver-volume down and test if the receiver shut down it needs to fix in service center-if not insert speaker one by one until you find the bad one-change its cable first and then change speaker itself.

Nov 29, 2007 | Marantz SR-5200 Receiver

1 Answer

It keeps turning off


The audio output ICs or transistors are blown. Solid state elctronics are not very forgiving when they are shorted. it takes one tiny instantance and the componets will fry. sorry to be the bearer of bad news but you will need to have this unit serviced or replaced, And never ever work on any type of electronics with the power still on. Good Luck

Apr 07, 2007 | Yamaha HTR-5830 Receiver

1 Answer

Shuts off about 5 sec. after i turn it on


The power amp module ( s) have probably "bought the farm"

Post what part numbers you find on them.

Jan 05, 2007 | Harman Kardon AVR 510 Receiver

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