Baz A great repair on the Yamaha Amp I old mate upgraded his system and gave the same Amp I was going when I pulled it out I haven’t used it for some Time I did on bench some time ago and still aok He had a good setup with a Pioneer Plasma CTV and Yamaha amp Sadly he developed dementia and forgot how to drive his System and always up to resident to get him out of trouble He owned a footwear company in the city he is deceased now I miss my conversation with him after he passed I knew his wife quite well sadly she developed big C and she passed away on couple years Since he passed,Thanks Baz for revising old time, Ian,
@techobaz55
Ай бұрын
A bit of a sad story but such a lesson to listen to the old timers stories & knowledge before we lose them. Thank you for sharing this story !
@mddawson1
Ай бұрын
I have repaired three Yamaha AVRs over the years and all three were that capacitor. The first one was the easiest as the board was mounted vertically so no need to remove it. The other two needed a similar level of dismantling as the one in this video.
@techobaz55
Ай бұрын
Wow, and this one is my first encounter. Takes the challenge out of the next one though ! I still can't understand the shorted mosfet, your thoughts on this ?
@mddawson1
Ай бұрын
I never checked the mosfet as mine just worked after changing the capacitor. It could have been an unrelated failure but then again I only know enough to be dangerous.
@techobaz55
Ай бұрын
😆
@KS-jy4hl
Ай бұрын
Great video Baz! Not many people bother to check the MOS next to that capacitor 💪 Please do more on the Yamaha receivers, your diagnostic technique is great 👍
@techobaz55
Ай бұрын
Will be doing that down the track. Thanks for your comment.
@elcapitano6470
Ай бұрын
The capacitor was what went in our Yamaha, the only thing I swapped to get it back in action. No more than a couple of bucks to fix but some people would trash a good amp not knowing it's something so simple.
@techobaz55
Ай бұрын
Seeing the Mosfet was shorted as well I guess you wouldn't have been able to put it into standby. Have had that cap problem a few years ago, strange how a poly cap loses it's value in this circuit !
@radio-ged4626
Ай бұрын
Nice straight forward fix Baz, thanks for sharing it.
@techobaz55
Ай бұрын
Thanks
@1mmickk
Ай бұрын
The first person to invent a system that controls every function of these devices by voice wont have to work again. We had a local repair shop once and he had a sign up. Standard repair 30 an hour, youve tried to fix it 60 an hour, want to watch 120 an hour and so on and so forth up to about 500 per hour. Mike Rudd seems to approve of this video! Ive liked and subbed great presentation I like your style young man.
@techobaz55
Ай бұрын
I reckon voice command is compulsory with these bloody units. Main problem, you fiddle with the settings testing when it's repaired, customer takes home then rings & says he can't get it working like it was ! NOT what you need ! Thank you for the comment, like & sub, much appreciated ! Cheers
@vincesnetterton5868
Ай бұрын
yep saw that cap issue straight away. now i just reach in and chop it off long , and put another on the long legs left. 5 mins
@techobaz55
Ай бұрын
Seeing the mosfet was short circuit as well the unit wouldn't go into standby. Had to remove board to do this anyway. I would prefer to show people diagnostic videos, not a 5min known fix, no one learns from these. Cheers
@handsomemann1
Ай бұрын
Wow! This repair deserves a "Family Size" Pizza with 2 large 1.25 litre Coca Cola. Coming your way. Enjoy and a well done repair. Good to see you recovered from the cold and Flu too. See you in the next project for more well earned Pizzas.
@techobaz55
Ай бұрын
Yes please!
@johnbravo7542
Ай бұрын
Thank you Baz I have a slightly older version still works fine,but at least I know what to look for if I encounter a similar problem,Don recomended your channel to his viewers.
@techobaz55
Ай бұрын
Ah, I didn't know, must thank Donny ! These are great units, hope all goes as planned when put together though ! Cheers
@Donno308
Ай бұрын
Hi Baz. This stuff is way outside my experience but it seems you've done a lot of this type of thing and knew just what to look for. Very interesting watching something different. Hope your speaker repair is going ok. Cheers
@techobaz55
Ай бұрын
Well Don, glad you enjoyed it, it helped me distract myself from THAT speaker ! But today is the day, I have a plan, hope it works ! Cheers Mate
@ShadowsOnTheScreen
Ай бұрын
An excellent video that provided good advice. Thank you! Dan
@techobaz55
Ай бұрын
Cheers Dan, thank you for your comment & for watching
@frankd.b.9233
Ай бұрын
Cool a 2007 mod.
@techobaz55
Ай бұрын
Thanks for watching 🙂
@Jammerk40
Ай бұрын
My friend has a six channel Amp by Yamaha and he never turns it off and by gosh she's been running for twenty years of its life. Amazing. They say that you keep them on all the time and they last longer. Go figure.
@techobaz55
Ай бұрын
Might be the answer, costs money these days to have them running full time though ! The joys of power bills . . .
@1mmickk
Ай бұрын
I have the RXV3900 they do not like the Aussie heat. The removable plastic shield on the top was fitted to comply with some EU safety rules re fingers. They get a lot of dust in them too. They do however shut down when they get too hot which is good IMHO.
@mdzacharias
Ай бұрын
C2508 is a known problem on 240V models. Also I have posted a Yamaha tutorial on how these supplies work. kzitem.info/news/bejne/xK2h3mWkrqx5qJw
@techobaz55
Ай бұрын
Oh ok, I have repaired quite a few of these over the years with amp & front panel probs but not this fault. Thank you so much for providing more info on these supplies. I'm sure this will help everyone here. Cheers 🍻
@mdzacharias
Ай бұрын
@@techobaz55 You did a great job! I never knew about that cap issue until I heard about it from other techs in 240 volt regions. To my knowledge it hasn't happened on 120V versions (I'm in the U.S.)
@techobaz55
Ай бұрын
@mdzacharias thanks, think a few of us are learning stuff from this, well I hope anyway 😀
@eivindamundsen7090
Ай бұрын
That auxiliary/standby PSU board is "unique." I wonder what the requirements it was for building it. Throw as many unnecessary components you can on a PCB to make it look complicated . The 4013 flip-flop is basically a small signal transistor, and it could be replaced by a resistor. The whole board could be omitted, because there is a 250v AC (2.5A )? Power button at the front that could drive the tiny iron core ? (Reset (pin 4)of the 4013 is connected to GND, it pull a 50Hz/60Hz (AC) clock (pin 3 - over R2512) from the capacitive dropper (C2508) that also powering the circuit via the 10V zener diode (D2507) rectified over the D2 diode. The FET driving the iron core transformer is pulsed (50/60Hz) by the pin 1 of the flip-flop if D (pin 5) is high. Pin 5 of the 4013 flip-flop is pulled high by IC253 (optocoupler) if/when the D2511 (9.1V ) zener kicks in its limiting the output voltage to 10 - 10.5V (?) ) Anyways thanks for an interesting and entertaining video. Good work.
@techobaz55
Ай бұрын
Thanks for a good exlplation of this over engineered supply. I haven't dealt with these before. Cheers
@robertjianu7434
Ай бұрын
3850 nu este mosfet
@techobaz55
Ай бұрын
Data search shows a 2SK3850 as a mosfet. Can you let me know your thoughts otherwise, I'm interested. Was replaced with a mosfet & works fine.
@robertjianu7434
Ай бұрын
@@techobaz55in the data sheet of my Yamaha rx e810, that 3850 transistor is noted as an npn transistor. It is actually a mosfet N chanel transistor. My mistake . my apologies. keep doing what you are doing. greetings from Romania
@techobaz55
Ай бұрын
@robertjianu7434 ahh mystery solved ! I did see the manual said a transistor but a search said mosfet. Also made sense in this circuit ! At least we have solved the mystery. Thanks so much for watching & your comments. Cheers from Australia 🇦🇺👍
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