Pioneer SX-1250 Vertical Card Rebuild Service w/ Test Jig | Process Explained

In this video I cover the details of the SX-1250 vertical board rebuild service that I began offering to customers in 2024.
Flux removal technique shown by Prime HiFi
• Sansui AU-717 Integrat...
00:00 Introduction
01:14 Test Jig Overview
03:38 Preamp / Power Amp Isolation
05:08 Board Removal
10:49 Initial Testing of Suspect Cards
16:20 Protect Service
21:53 Power Supply Service
26:03 Protection & Power Supply Testing Post Rebuild
28:10 Driver Board Service
31:24 Full Performance Testing Post Rebuild
38:14 Loading The Cards Back Into the Chassis
45:15 Adjustments
1:00:00 Outro

[@simonwang4222]

Thanks it is very clear and detail. A great receiver like this deserves such treat.

[@marcvdfv8431]

there are slotted brackets available in which you can slide PCB's, for testing purposes in you rig these would be even easier to use!

[@PrimeHiFi]

Just got around to watching this. Great video, Ben! And thank you for the shout-out!

[@davidwagler6919]

Awesome video - thanks for taking the time to explain everything!

[@MattDealy]

The best tech on KZbin back at it again! Thanks for sharing your process with us, Ben!

[@martinkoskella3943]

Like your jig for amp section, nice convenient test points. Clever.

[@poormanselectronicsbench2021]

What might even be more useful is, to extend all of those Molex connector cords so you can connect the boards outside of the chassis a bit, and have enough slack to access the tops and bottoms of each PCB for making voltage or signal readings while still being in circuit. It might not be too hard to source some male and female Molex plugs, and then just have to add some cable, and crimp on pin and sleeve connectors.

[@NovaluxStereophonic]

For sure. Things I am thinking about for the future if this becomes a popular option for customers.

[@DanielWelsh-vz9ls]

Rock. On. Man. You. Make it look. 😊

[@g.fortin3228]

two meters indeed. kind of a pain with one :- ) Nice vid !

[@robertmartin5679]

I have a question about measuring and setting the BIAS Digital Multimeter true RMS value and Average value digital multimeter, old analog meters used to be used to set BIAS parameters, so now we use modern meters to change the BIAS parameters to other ones?

[@NovaluxStereophonic]

True RMS comes into play with AC signals but bias and offset are both the DC realm and old vs new meter should not make a difference. I hope this answers your question.

[@Hefty54]

Hi do you have a volume control pot for my Pioneer SX1250? I defiantly needs to be replaced. Or do you know where I could possibly get one? Thanks for any help.

[@NovaluxStereophonic]

@@Hefty54 putting a keyword watch on eBay is your best bet.

[@4vinylsound]

Where are you located, I own and use daily my 1250 has all original parts. never touched and worried it'll go soon. Will need restored. Thanks.

[@NovaluxStereophonic]

NYC - Manhattan

[@4vinylsound]

@@NovaluxStereophonic what's the name of your business in Manhatten I'm not too far. I can drive there if and when my 1250 goes. I'm in the north east.

[@NovaluxStereophonic]

@@4vinylsound same as the channel name. Novalux Stereophonic. You can contact me via my Facebook business page.

[@4vinylsound]

@@NovaluxStereophonic I don't use Facebook but I can't contact you through Google when if my receiver acts up because I know it will soon it's old and all original parts if you wouldn't mind possibly servicing it in the future

[@DanielWelsh-vz9ls]

No yes. Was good.

[@bigblockelectra]

17:30 what is that wavy material? Is that a conformal coating?

[@NovaluxStereophonic]

Could be… whatever it is it’s from the original manufacturing process and looks much nicer once removed.

[@michaelaue7411]

Man I have Technics SA1000 that love someone with skills to recondition, this thing scares me

[@dalboltv9747]

Can you please send me a quote for upgrading these boards?

[@NovaluxStereophonic]

At the end of the video I share how to get in touch for pricing.

[@therealdjryan]

Are you sure you’re not misidentifying conformal coating as flux residue?

[@NovaluxStereophonic]

I am not sure and it’s completely possible that I am mistaken. In any case the original joints do not look like they benefitted much from whatever is there.

[@therealdjryan]

@@NovaluxStereophonic I didn't mean to come off as 'that guy' who posts comments intended to demean or insult, so I hope it wasn't taken that way. I actually have a question on this. Do you think reapplying conformal coating it is a good idea since that's how it left the factory? I would not find it hard to believe that there are some formulations out there which, like some glue used to hold caps in place, goes conductive over time. Thanks for posting such great content. I find your videos an excellent resource and I admire the way you work. My lab has never looked that tidy!!

[@NovaluxStereophonic]

@@therealdjryanNo offense taken. I learn a great deal through comments. My main conclusion on this topic is that the benefits of being able to clearly see all of the solder joints and not have a sticky board outweigh the protection that an original coating may or may not offer.

[@solomoncohen1861]

Are you a technician where are you located I have about 10 vintage receiver need to be

[@NovaluxStereophonic]

Located in NYC