yamaha a-s2100 dream/repair

[smithie]

Do you know how old it is ? ,
I am NO expert but with most things HIFI people start by replacing ageing capacitors

hi
no idea but im pretty sure these never came out till around 2014/2015,the four main 22000 are HUGE,they could be tricky to source as there a yamaha part but early days yet to think along those lines,the rest seem to indicate that yamaha have shares in nichicon

[Audio Al]

hi
no idea but im pretty sure these never came out till around 2014/2015,the four main 22000 are HUGE,they could be tricky to source as there a yamaha part but early days yet to think along those lines,the rest seem to indicate that yamaha have shares in nichicon

OK , Also it may pay you to spray the connectors with detoxit when you pull them of and re seat as this will clean the pins and connector sockets

[smithie]

if i end up "tackling it" then i shall use and pay attention to all the advice and tips given,thanks for the heads up and advice.

regards
smithie

[Beobloke]

I am NO expert but with most things HIFI people start by replacing ageing capacitors

Yamaha use decent quality capacitors and the unit is only a few years old. All that changing them will achieve is to lighten the wallet unnecessarily and introduce the possibility of circuit board damage when extracting the old ones!

[smithie]

Yamaha use decent quality capacitors and the unit is only a few years old. All that changing them will achieve is to lighten the wallet unnecessarily and introduce the possibility of circuit board damage when extracting the old ones!

lol
rest assured ive already lightened my wallet more then enough already and wont be replacing anything that doesn't need to be replaced to get it up and running...slow and steady is the way i will go,as much as i would love to have it up and running and sitting in my system playing i have no critical need to get it up and running yet,i have a denon 350se doing sterling sound and service in my very modest system at the moment.
like ive said.."slow and steady" and at lowest cost to repair as possible

regards
smithie

[Edward]

Been googling a bit more on this magnificent amp. The service manual is available and goes into a lot of detail. For example a detailed strip down via exploded diagrams but also how to temporarily disable protection mode to get into the diagnostic modes to pin point where a fault may be. Also it is possible to update the firmware of this amp - which is essentially a microprocessor controlled amp.

Any self respecting electronic engineer should narrow down where the fault is. Personally, if this amp was mine, I would at a minimum dig into the diagnostic modes to see what there is to see. No need to open the amp up - it can all be done via the front panel.

[smithie]

Been googling a bit more on this magnificent amp. The service manual is available and goes into a lot of detail. For example a detailed strip down via exploded diagrams but also how to temporarily disable protection mode to get into the diagnostic modes to pin point where a fault may be. Also it is possible to update the firmware of this amp - which is essentially a microprocessor controlled amp.

Any self respecting electronic engineer should narrow down where the fault is. Personally, if this amp was mine, I would at a minimum dig into the diagnostic modes to see what there is to see. No need to open the amp up - it can all be done via the front panel.

hi edward
and that's exactly what i did when i first got it.
couldn't believe my luck to just be able to get the service manual off the net free of charge and so easily and as you say its shows you everything including the in depth diagnostics etc.
as mentioned this setup is telling me via the two flashes on the front panel that it is a power supply mainboard 3 problem,and certainly where i shall be looking first...its just the strip down that might take awhile,and finding a bit of room to work on it in bits....its a big-un
as always thanks for the thoughts,ideas and advice...always helpful.

regards
smithie

[smithie]

did i mention how cramped and tight it was inside this amp? way dusty to

[Beobloke]

To be honest, it's most likely that one or more of your output transistors are toast, which you can check with a multimeter.

[smithie]

To be honest, it's most likely that one or more of your output transistors are toast, which you can check with a multimeter.

cheers adam
i may be having someone popping over wednesday with the brains and talent and skills to shed some light on the matter....here's hoping as im so keen to have a listen to it!!