Pioneer SX 1250 Left Channel Repair

A bit of a change of pace today. This rebuild video is from my brother Jake. Watch as he isolates the cause of a dead left channel in this vintage stereo.

[@saubz]

Nice job! Love those receivers from the 70s.

[@ReyciclismoMTB]

I found your video, while looking for information about it. I just got one. Has a channel issue. Great video, great explanation.

[@RecordsRebuilds]

Thanks!

[@carlosdlc1664]

Thanks for sharing your knowledge and you explained it so well.

[@tima.478]

Was having a ton of static on my left channel on my Pioneer SX-1080 which I purchased brand new in the Marines, Okinawa Japan. (1987) Never been serviced, mint condition unit. Turns out it was my Tone Off/On switch. I flipped it a couple of times and the static completely went away. I hadn't flipped that switch in probably 10 years even though I listen to the receiver just about every day. Been perfect for 4 months now. I'm a happy camper! lol.

[@RecordsRebuilds]

That’s awesome man!

[@tima.478]

@@RecordsRebuilds Was a truly, lucky find/fix. 👍

[@garyvanremortel5218]

I still have my fully functional like new SX1250 and HPM100s. Bought in 1976 for a total of $1K.

[@tomhill9445]

I just picked one of these up the other day. Has the same problem. Im going in with hope !

[@ozkrjc3075]

Great fix!

[@RecordsRebuilds]

Thanks!

[@rickcunningham5581]

I think I have the same problem. Left channel will cut out sometimes off and on. You can turn the stereo switch to mono and it will play left speaker fine. Then later flip the switch back to stereo and will play fine for a while, then I will have to repeat the process. Guess it's time for the audio shop to check it out.

[@tima.478]

Spray just a very tiny bit of DeoxIt into the Tone switch and flip it back and forth a few times, see if that fixes it.

[@alexzildjian]

Thanks for the vídeo i like to learn 🎙️🎼👋

[@RecordsRebuilds]

Thanks for watching!

[@BB-kr7ep]

What part number is the relay and where is a good place to buy one online? Thanks!

[@RecordsRebuilds]

Sorry, I should have answered sooner. My brother says “I believe it is an Omron MY4-02-DC24”. He says you can find it at Mauser, Digikey, ebay, etc.

[@crankbait2768]

Just out of curiosity how come you didn't hook the receiver up to a dim bulb tester before powering on, just to make sure you hooked up everything correctly?

[@RecordsRebuilds]

From my brother Jake: “I knew the history of this particular receiver because it was my father-in-law's and therefore wasn't concerned that the power supply had problems. 100% recommend using a dim bulb tester or Variac when firing up new-to-you equipment for the first time.”