Pioneer SX-1250 ~ Full Amplifier Section Rebuild at the Bench 

I think Rubio rebuilding the cars without having to sending unit somewhere is an awesome idea be a great service and that way we wouldn't have to worry about our units getting damaged by The Gorillaz in the shipping companies ! awesome video !

Hey Ben, awesome video, rebuilding just the cards would be a great idea. I'm working on a Spec 2 unit, was admiring how nice they designed the removal of the cards on the 1250. Sure would have loved that option on the Spec 2. Enjoyed your work and learned some of your tricks . Thanks!

Very good content. I installed some new (modern) driver boards on a Sansui 2000a a while back. Met the guy through AK and think it was $90 shipped maybe? The were really nicely built, installed effortlessly and have been rock solid for the customer. I was impressed.

Thank you for responding to my questions, I will open up my sx 1250 and take a look at its general condition.

Really like your idea and the amount of detail you go into😄!

Thank you.

Sending cards will make life easier

Ben, I did enjoy it and learned a bunch. Question? if I pulled my cards on my SX1250 would you be able to take phone calls on correct removable & install? My longtime Pioneer tech passed away, and I am on my own now. There is nothing wrong with my unit now, but I feel a good going over everything every ten years or so is a wise investment because there not going to build anything like these monsters ever again. Dirt/ dust & hair in the switches are a big worry as well. In my opinion. My unit is about 8-3/4 out of 10 with a 10 being right out of the box new.

Very nice and informative, I have a fisher rs 2015, that I got not working and some hack was in there. But anyway, have you ever consider or used a ultrasonic cleaner for the card or chassis cleaning.

Excellent video Ben! On the cards - do you also clean the plug-in pins? You didn’t show this so wasn’t sure. Might seem like overkill, but that oxidation on the pins (and the subsequent removal) does make a difference - especially with all the other great servicing you’re doing on these. Keep up the good work! Thanks.

Great video. If I had not already dug into my 1250, I would make use of your service. But I was brave (foolish?) enough to dig into it myself, and now have a problem. I replaced the main filter caps, recapped the power supply, protect, stabilizer, and both amp boards. Now just one amp board gives me a problem. VR2 will stabilize at 75mV, BUT VR1 won't sit still! I'll tweak the adjustment to get it close to 0mV, but it keeps dancing around until all of a sudden the voltage will climb dramatically! It will then go into protect if I don't shut it off. I'm sure the problem is on the board since I swapped the board to the other side, and the problem came along with it. How about some advice for someone too stubborn to let a pro do it?

Ben, one more thing FYI... I also replaced transistors Q1, Q2 and Q11. Interesting to note that both pads for the STV-3H varistors on both amp boards had lifted on my 1250 as well. Viewers should be aware.

Hello Ben. My 1250 seems to perform ok and able to bias each channel at 100mv. When attempting to check stabilizer voltage, it’s showing 0 on both pins. Any certain spot to ground or other issues?

Am I correct that the filter caps can be replaced without removing any other components? Also, how did you clean the chassis? Thanks. I think the heat sinks would look great if they were anodized a charcoal grey.

This video is captioned "Part 1" -- was there ever a Part 2? I can't find it.

I’d be very interested in sending u the boards out of mine for rebuilding of caps, diodes and noisy transistors

Thank you for the graphic warning. That was disgusting!

Hey Ben, what di you use as a dummy load?.

Where are you located?

this powerful man should be given to his man not you