Just finished Sanyo Plus 130 receiver restoration

[Matt03221]

Practically vaporware. A production run of 4 is pretty much prototypes or custom items.
Interestingly, I was looking through my service docs, and found an original Plus 130 service manual. Not sure where it came from, but I've had it for years.

tarior- any chance you still have your "original" Sanyo Plus 130 service manual? The one off HiFi Engine is decent except for the PCB component layout diagrams- they didn't transfer well- see attached sample. Is yours any better?

 

[tarior]

tarior- any chance you still have your "original" Sanyo Plus 130 service manual? The one off HiFi Engine is decent except for the PCB component layout diagrams- they didn't transfer well- see attached sample. Is yours any better?

I could swear I sent it to someone here on AK to add to the database a few years ago, but I don't see it there.

 

[Matt03221]

So it's lost forever?

 

[tarior]

Maybe. Let's see if it reappears when I get all of my shop stuff unpacked.

 

[Adaboy5]

My goodwill Sanyo A35 Plus had burned resistors, transistors and capacitors in the power supply as well. Had to open the power switch up and clean the contacts. So far so good.

 

[BigGxlr]

Thanks for the link. These are the old parts, I always keep and them and bag by board name , I also keep my notes and highlight each component as I replace them. Will be handy if I ever have to work on it again, or the unlikely event that I ever sell something something

View attachment 2081141
View attachment 2081142
View attachment 2081143

I have a Sanyo plus 130 receiver I’ve had it since 1980 bought it new but now it doesn’t work. I’m looking for someone to repair it for me.

 

[chazix]

looking for someone to repair it for me

You might want to mention your location, assuming you would prefer not to ship the receiver. (Somewhere I think there is a thread with repair people listed by location, but I don't remember where.)

 

[KeithTr]

Earlier this year I found a Sanyo Plus 130 receiver at my local ewaste drop off site. Amazing find considering they only made about 1500 of them, that puts its rarity in the same league as Marantz 2500. Very cool with the tuner displaying both digital and analog. LED power meters and unique Freon filled heat sinks. Even with its rough condition I had no choice, this receiver must live again. The first shocker was the dial glass had been busted.


This receiver had a rough life, power transistors burned, resistors smoked and charred craters in the pcb



Also pretty dirty inside


This receiver was not designed with service in mind. The power supplies are located on the same pc board as the amps. To get to the power amp boards the power transistors which are attached to the big heat sinks must be disconnected from the driver board via 8 molex connectors. Then the Receiver has to be upside down to unscrew the main power caps. Once that’s done the amp boards can be flipped 180 degrees and re connect the power transistors and caps for troubleshooting, rinse and repeat to work on the other amp board. The power transistors molex connectors can be attached several different ways that will produce smoke. Even though it looks like the left and right power transistors are interchangeable they aren’t. Care must be taken in case someone else has been inside. I managed to find a very bad copy of the service manual and uploaded it to hifiengine , so I was able to trace out and Map the proper orientation of the molex connectors.


I managed to replace all electrolytic caps , burned resistors and transistors and get her singing again. I Also replaced the busted glass, was fortunate there was no lettering or holes in the original design.



Everything works great with the exception of AM radio, the rear antenna was missing. Never Listen to AM any longer so no big deal. FM works great!


In the rack now connected to a set of KEF 104.2’s which are constant 4 ohm load. Sounds good and hardly breaking a sweat.

Makes the mighty STA-2100D look small!
I also have a Sanyo Plus 75 I would like to restore but unfortunately it uses the unobtainable transistor power packs, so working on discrete transistor replacement.

The Sanyo T55, C55, and P55 are also excellent devices, though the P55 tends to run hot as often the heat sink has lost its freon. The P55 is Hitachi MOSFET outputs and tests extremely well on the oscilloscope. P55 not the easiest to work on, but not terrible either. I use that system often.