Yamaha R-500 Receiver

lamovt · 4th March 2010, 07:56 PM

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.
Louis

Bigred · 5th March 2010, 05:15 AM

Datasheet can be found HERE

Bigred · 5th March 2010, 05:35 AM

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.

mltube · 12th April 2010, 06:48 AM

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
mltube
These are excellent recievers, and the last of the analog yamahas.

sakis · 12th April 2010, 01:49 PM

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

RicardoMartiga · 3rd March 2011, 09:22 PM

hi friend !! i have the same receiver but i lost the amp IC 303. this IC is stk3042II ? thanks .

Bigred · 5th March 2011, 09:19 AM

NO, IC303 is the STK2040 output module.

4th March 2010, 07:56 PM	#1
lamovt diyAudio Member Join Date: Feb 2010	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. Louis

12th April 2010, 01:49 PM	#5
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	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 __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

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5th March 2010, 05:15 AM	#2
Bigred diyAudio Member Join Date: Jul 2007	Datasheet can be found HERE

5th March 2010, 05:35 AM	#3
Bigred diyAudio Member Join Date: Jul 2007	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.

12th April 2010, 06:48 AM	#4
mltube diyAudio Member Join Date: Feb 2010 Location: Fergus Falls, MN	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 mltube These are excellent recievers, and the last of the analog yamahas.

3rd March 2011, 09:22 PM	#6
RicardoMartiga diyAudio Member Join Date: Mar 2011	hi friend !! i have the same receiver but i lost the amp IC 303. this IC is stk3042II ? thanks .

5th March 2011, 09:19 AM	#7
Bigred diyAudio Member Join Date: Jul 2007	NO, IC303 is the STK2040 output module.

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