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Old 4th March 2010, 07:56 PM   #1
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Default Yamaha R-500 Receiver

I just changed the STK3042II voltage amplifier of my Yamaha R-500 receiver, without success. This after the receiver quit sounding and after reading advices on this forum. What else could be broken?. I wonder if any one could e-mail me the electronic spec sheet of the STK3042II, so that I may follow the inputs and outputs of its pins. Thanks.
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Old 5th March 2010, 05:15 AM   #2
Bigred is offline Bigred  Canada
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Datasheet can be found HERE
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Old 5th March 2010, 05:35 AM   #3
Bigred is offline Bigred  Canada
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We need a little more info than my amp quit sounding. That could be caused by more things than I care to count. What made you decide to change the voltage amplifier IC besides reading suggestions on a forum? Is the amp in protection? If so my money is on the STK-2040 output chip. HERE is the datasheet for that.
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Old 12th April 2010, 06:48 AM   #4
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Hi Lamovt,
Today I was given the same Yamaha R-500 for nada.
It also has no audio output, so I will attempt to debug mine tomorrow, and try to give you possible sugestions. Who knows, it could be somthing simple (lets hope) but for now it's late. Need shut eye.
You can send direct Email's if you wish.
Let's get these yammies up to speed again. )
Good night
These are excellent recievers, and the last of the analog yamahas.
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Old 12th April 2010, 01:49 PM   #5
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GENERAL information will be to make sure that soldering is proper ....electrolytics replaced if not all then the ones that are leacky ( and for sure are many ) plus that all pots and switches will need proper cleaning

general information can be found herehttp://www.diyaudio.com/forums/solid-state/136261-vintage-amplifier-repair-upgrade-manual.html

and if you need schematic please email me

regards sakis
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Old 3rd March 2011, 09:22 PM   #6
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hi friend !! i have the same receiver but i lost the amp IC 303. this IC is stk3042II ? thanks .
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Old 5th March 2011, 09:19 AM   #7
Bigred is offline Bigred  Canada
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NO, IC303 is the STK2040 output module.
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