Yamaha Amp

Dynsdale · 26th September 2005, 08:43 AM

Hello all,
I recently bought a Yamaha A-760 stereo amplifier in a second hand shop, it was cheap and thought I'd gine it a go to get it fully working.
After a bit of fiddling I got it working, all that's wrong now is that the panel lighis do not work.
Does anyone know fo a schematic for this amp or know anything about it.
Your help would be appreciated.
Cheers
CB

dudu · 26th September 2005, 01:42 PM

Hi
Go to: www.eserviceinfo.com
After - login , search - Yamaha
Dudu

jaycee · 26th September 2005, 06:28 PM

It's possible the lights are wired in series, so if one bulb has blown then none of them will light. Do a simple continuity check over each bulb.

audio3000 · 26th September 2005, 07:43 PM

That's very likely the case. My CA410 is wired in series.

anatech · 26th September 2005, 07:44 PM

Hi Dynsdale,
The lamps may be burned out - that's normal for this age. Did you check if there is voltage across them? Sometimes Yamaha will use the lamp to perform another function. Like the muting circuit in some of their receivers.

-Chris

Dynsdale · 29th September 2005, 08:32 PM

Thanks to all, sorry about the late reply, been out the house.
I will give your suggestions a try.
Many thanks,
CB

26th September 2005, 08:43 AM	#1
Dynsdale diyAudio Member Join Date: Aug 2005 Location: Simon's Town, Cape Town.	Yamaha Amp Hello all, I recently bought a Yamaha A-760 stereo amplifier in a second hand shop, it was cheap and thought I'd gine it a go to get it fully working. After a bit of fiddling I got it working, all that's wrong now is that the panel lighis do not work. Does anyone know fo a schematic for this amp or know anything about it. Your help would be appreciated. Cheers CB

26th September 2005, 01:42 PM	#2
dudu diyAudio Member Join Date: Jul 2005 Location: Tal-el (galil)	Yamaha A-760 Hi Go to: www.eserviceinfo.com After - login , search - Yamaha Dudu

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26th September 2005, 06:28 PM	#3
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	It's possible the lights are wired in series, so if one bulb has blown then none of them will light. Do a simple continuity check over each bulb.

26th September 2005, 07:43 PM	#4
audio3000 diyAudio Member Join Date: Jun 2005 Location: Canada	That's very likely the case. My CA410 is wired in series.

26th September 2005, 07:44 PM	#5
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Dynsdale, The lamps may be burned out - that's normal for this age. Did you check if there is voltage across them? Sometimes Yamaha will use the lamp to perform another function. Like the muting circuit in some of their receivers. -Chris

29th September 2005, 08:32 PM	#6
Dynsdale diyAudio Member Join Date: Aug 2005 Location: Simon's Town, Cape Town.	Thanks to all, sorry about the late reply, been out the house. I will give your suggestions a try. Many thanks, CB

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