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I picked up the VP-7725B today but am having a hard time finding a user or service manual. Any change you have either of those Ray?

Thanks Ray, I missed your videos. I also don't like to repair a mechanical parts as you my friend.

Amazes me when I see these things being taken seriously overseas. In the UK they are nothing more than cheapo House-brand units sold by Richer Sounds, a discount hifi/AV retailer. They generally sound pretty good but under the skin they're the same cheap Chinese junk sold by all the sheds.

Hello Ray, nice and useful video once again!. I hope there is a way to figure out what is wrong with the display. Most of them have an epoxy blob covering a chip that decodes the signals and applies all the signals to drive the LCD. If that chip fails, there is not much you can do. The back light is usually driven separately, and it does not involve the said chip so the fact that there is back-light does not necessarily mean that the driver chip is receiving power. Most likely you already knew and tried this, but if not, it would be my two cents.

Another great video Ray! It's really difficult finding schematics these days! Back to basics! Great job!!!🙂

Nice to see another video from you. Would have loved to see the smd installation. I sold many of those. I think that player has a dimmer, on off function. It’s been a while since I had one.

Nice one Ray !

Good job, it's always difficult working blind on digital circuits like this.

I've had a 740C for over a decade. I've never had to repair any device more than this unit. Those main filter caps are 'proprietary' (I.e. as cheaply made as possible). A transistor and some caps in the servo always go. And the worst being the connectors and traces in the front panel get intermittent open circuits. They are great sounding players when working but they tend to come back like boomerangs with another issue. Scrap it!

I have experienced LCD that had the various layers de-laiminate when heated(OLD radio shack portable computer 1980's stuff. When left on automobile dashboard in the hot Florida sunshine). It went totally black.

12:19 harmony 650? dunno why they had to stop making them. it's going to suck when they take down the server and they can't be programmed anymore but until then, i love mine.

Good fix ... bad display ... semi-bummer.

Moist environments are not good for electronics, it looks like this amp was stored or used in a garage from the looks of that corrosion and the power transformer was rusty looking.

Great information about the "quick test" on the output transistors. That will come in handy I'm sure. Thanks Ray!

Thanks Ray, interesting amp.

Nicely done, as always.

Hi Ray great job as always👍 never seen meters corroded like this 🤔 must have been in a very humid environment 🤔 or they were cooling it with water 😂. Nice day 🙂Tom

Old vintage stuff like that is hard to find .... I was raised on tube type stuff then solid state . Me , myself I don't really need the meters to achieve a balanced sound .... Great job on that diagnosis ..

You Really do need a haircut guy. ...and we will recap what we feel like recapping. So bloodlet that

Thanks for sharing ,but if you’re getting distortion on the peaks would that mean you’re driving the finals to hard or is there a fault in the amp it self ??

Hi Ray, good to see you again! BTW I own the same scope, it's a great one! Great video! Take care!

Ray, check the pnp input differentials , the blue caps on the amp driver board, and the pnp devices in the phono preamp and line stage. I do not remember the pnp device numbers . Also cracked solder joints in the PS on the dropping resistors.

Ray, what is a model number of your spectrum analyzer? It's hard to see. Thanks.

thanks ray. keep em coming!

A beautiful example of intelligent diagnostics 👍, reductions are sometimes a problem. Nice day 🙂 Tom

Good looking equalizer. Nice painless repair. 👌

Awesome, everybody deserves one of these every now and then in our game ! and today it was yours, cheers Ray.

Nice! Sometimes it's nice to have a "quick win". Thanks for the video Ray.

Great repair and good to save it from jaws of the recycle center. I wish I had the $ to send you my dying NAD 9060 6 channel amp to completely update. I'm now getting hum and distortion in several channels. To save it I will have to recap and replace any other failing/failed parts. This is likely going to be a major task. Luckily, I have many great electronic techs like yourself to give me inspiration and guidance. All the best to you and yours, Kevin

It's always nice to have a relatively easy fix and great to have the skill and knowledge to verify. Good job and thanks for sharing.

Gotta love the easy ones!

Good repair. What about the other resistors in that area? I guess it's just wait and see. Always look for to your videos Yours and Shango .

Nice quick repair ! You can also replace the 120 ohm on the plus VCC rail with a one watt resitor !

Thanks Ray! Well done, as always! The process is the most interesting thing of all. Somebody needs to write a book like "The Inner Game of Electronic Repair"...

A lot of work with this Marantz tuner, but with a good result. In this situation why not suspect that the local oscillator is detuned? Someone could have manipulated it. Or a problem with the J-FET RF input amplifier?

Good job as usual Ray. You explain your diagnostics and trouble shooting very well. Look forward to more. I also have realized that accumulation occurs much easier than decumulation 😉, but I’m getting it done…moving soon too. Good luck with the strike…CWAStrong!

Good to see you back at the bench! Nice diagnostics and, yeah, every Pioneer I've touched has had a real maze of a power supply.

Nice, Mr. G is back! Thanks for taking the time to share your knowledge and technique. 👌💪

I really dislike moving so don’t envy what you are thinking about doing. Good luck.

Glad you’re back online. I seriously doubt it will be a long strike nobody can afford a strike any more. I survived three strikes. Metro Atlanta is a good area. Climate is reasonable year round. Housing is no where as high as the area you live in.

Another awesome one, Ray :- ) I'm sure this will be helpful in the future when i have one of mine act up or am checking out something for someone.. the little bits of info are super valuable to us fairly new to troubleshooting. I'm happy things are well with you and you are back. Rock on dude ! I have some light hum in my Nikko NR-1415 that needs to be addressed at some point (probably over the cold season when i'm indoors more!) and all these little bits of info help!

Great info, Ray! You have a fantastic teaching style.

Ray, so glad you're back.

I have a 2246 doing the same thing. Clicks and the fan jumps when trying to power up. Where do i find the schematics so i can try to troubleshoot mine?

Glad to see you back! For future reference, the 150 Ohm resistor in series with that 1318 is also a common failure, and the blue (sometimes white) Sanyo coupling caps are notorious. In the SX-828 they cause big problems in the tone circuit but I think on the 850 they used Elna for that.

Nice to see you back Ray ! 😀

I think we work for the same company! :)

Thanks Ray, good to see you back

He’s back!! Really missed your videos. Thank you for taking the time to put this together Ray.

I hope your strike is a short one. I was on strike against Illinois Bell for a week and a half in 1983, but I was young and still living at home, so it was just an extended vacation. I can't see managers taking techs spots nowadays, especially in a CO environment or working on customer network equipment, as, very few, if any, know the requirements to even access the info needed to troubleshoot, resolve or install new new circuits or equipment. It's different to see how Pioneer powered some of the input amplification with a separate power supply, as most every amp powers that part with the same rail as the rest of the amp section, so I could see how that would throw troubleshooting the DC offset for a loop.