• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Ground score Sanyo JCX-2600K

caberguy

New Member
I was walking home from work yesterday and found myself a Sanyo JCK-2600K on the curb. I saw it from a ways off... obviously was hoping it was a Sansui, Marantz or a Rotel, but still not too shabby. Had to carry that 40+ pound monster about a mile home with me.

I work at university, and it was outside some student rental housing, probably just binned by a landlord cleaning out the basement.

Did a bit of reading up about it here before I took it down to the work bench. Luckily I read a couple of threads about the external pre-amp to amp connection, the jumpers were missing, so if somebody had tried it before they might have just thought it didn't work.

Anyway, it's dirty and grungy, and presumably lived a hard life in a college house, but it's mine now.

Connected the jumpers with an RCA cable, attached some speakers and my phone as a source and tentatively plugged it in. No smoke, no sparks, no shock. And it lit right up.

Played with the tuner a bit, which seemed to work fine. Copious amounts of crackling and popping from the volume pot, but other than that everything seemed to work. Switched over to the AUX input and played some tunes off my phone. Sounded really quiet, and a bit muffled... and then I noticed the volume attenuator switch, and turned it off, and oh yes, it works... there's the volume.

About a year ago I was looking to pick up a vintage receiver, but was a bit put off by the prices of the "good" ones, and the amount of work involved in bringing back the bad ones. Dipped my foot in with a cheap MCS 3237 which showed up with one of the channels completely dead. Still have that too, and was thinking about using it to learn a bit about repair. But now I have a freebie that actually seems to work.

It needs a cleaning and a fair bit of deoxit, but it's all there, and under the grime doesn't seem to be too beat up.

Any recommendations on getting that faceplate cleaned up? What about permanent jumpers between pre-amp and amp, just use short RCAs?

JCX.jpg
JCXd.jpg
JCXa.jpg
Dead flies on the dial lights... good stuff.
JCXc.jpg
JCXb.jpg


Anyway, long time occasional lurker, first time poster. I've been sort of a casual budget audiophile since the late 90s. My current main system is an NAD C316BEE V2, Music Hall MMF 2.2 and cheap Sony CD player running through Wharfedale Diamond 225 speakers. So a nice little system, but not vintage. Have a handful of other things kicking around the house too.
 
Register to hide this ad
Wow....that one has definitely been neglected. Hopefully you can bring it back to a working state. I have a JCX-2400 that, for whatever reason, I've had for 12+ years that doesn't have any output. One of those things where the lights come on but nobody's home. But it's in such good shape, I've kept it for whatever reason. I don't even use any receivers anymore and haven't for 10 years....I've sold all of them off except for a few stragglers that will be going away soon. One of these days, I'll do something with it. These Sanyo's seem to fly under the radar.
 
Welcome to Ak!
Use modest strength detergents for the face plate.. no Alcohol. Might soak the knobs taken off. No deoxit on the tuner cap. or inside the tuning transformers.
 
Welcome to Ak!
Use modest strength detergents for the face plate.. no Alcohol. Might soak the knobs taken off. No deoxit on the tuner cap. or inside the tuning transformers.
Thank you. Do you have any examples of a "modest strength detergent"? We talking about like dish soap or simple green, or something else?
 
Thank you. Do you have any examples of a "modest strength detergent"? We talking about like dish soap or simple green, or something else?
I've used both of those safely and effectively. For sure soak those knobs in some soapy water. Nice find!
 
I started working on it last night. Got all the knobs off but one. The treble knob wouldn't come off. The set screw was corroded, and I ended up stripping it. Then I tried to drill it out, but that didn't seem to do anything but marry the knob to the post. Then in a fit of frustration I used a bit too much force to try to pop it off, and the whole post came out of the pot... oops. Good thing is you just stick it back in and it works fine:

Ooops...
JCXoops.jpg

But at least I was able then to get the faceplate off. There was a bit more disassembly than I expected to get to the volume pot. I had to pull the PCB that holds the volume and balance, and remove the back plate from the volume pot assembly. But I applied liberal doses of deoxit to both the volume and balance pots, turned the knobs back and forth a few times and let it sit over night.

Put a bit more deoxit on them this morning and then gave it a test. It seemed to get rid of all of the crackling from these two pots, and fix the problem of having to wiggle the balance knob to get both channels to come in equally:

JCXcb.jpg

Knowing that it seemed to be working, I went ahead and did some clean up.

Before shots:
JCXbefore1.jpg
JCXbefore2.jpg

and some afters:
JCXafter1.jpg
JCXe.jpg
JCXf.jpg
JCXg.jpg

I haven't tried all the inputs yet. And there's still a minor crackle when I cycle the tone defeat switch. Probably should have tried out the phono stage before I put ti back together, oh well.
Seems to be working ok, though. I was just playing it on some cheap yamaha speakers. Later I'll hook it up to my big PSBs and see what it can do.

Not bad for a forty year old I picked up from the curb.
 
Not bad for a forty year old I picked up from the curb

Great receiver for a curb find and you cleaned it up very well! This line of Sanyo receivers is very well regarded and used to fly under the radar. At 85 WPC, it has plenty of power and are normally very reliable. I have the bigger brother (2900K) and I love it! You did well and I don't think you'll find a much better unit for the price ($0) plus a little elbow grease. Great job!
 
You did well and I don't think you'll find a much better unit for the price ($0) plus a little elbow grease. Great job!

The price was certainly right on this one, and I'm a bit surprised how nice it looks with the grime removed.

It was too hot upstairs today for me to really get motivated to hook it up on my secondary system, so I'll try to do that tomorrow. Right now that's my Harmon Kardon HK 6250 integrated (rated at 45w) pushing my old PSB Century 800i speakers, that can already make a pretty fair racket. This is the most powerful amp/receiver that I've owned by a fair bit. So I'm looking forward to see what this conservative 85w can do with those big dogs... there is definite potential to piss off the neighbors.
 
Well, I went out this morning and picked up some new batteries for my multi-meter and tested the DC offset, and once again I was pretty surprised by what I found, about -13mV on the left channel and around -2.6mV on the right, so holding up pretty well.
Offsetleft.jpg Offsetright.jpg

Got it hooked up in my upstairs system. Playing off of a Gemini XL-500II turntable with a Stanton 500 cartridge into my PSB Century 800i speakers (those are the ones with two 8" woofers and a max power handling of 200w). The turntable is no great shakes, and not dialed in, but good enough for a first go. Swapped the Sanyo in for my Harmon Kardon HK6250. I've owned both the HK and the PSBs since they were new.

Before I switched out the Harmon Kardon I gave a listen to some tracks off a few albums that were nearby, and then listened again with the Sanyo. First was "Walk Me Out in the Morning Dew" off of Europe '72 by the Grateful Dead, then "Killing Me Softly" by Roberta Flack, then "Natural Mystic" by Bob Marley, and then "Ready and Able" off of The George Benson Cookbook.

Tone defeat switched on on the Sanyo, tone controls neutral on the HK, loudness switch disengaged.

"Morning Dew"
In the intro to this track there are some pretty harsh high notes on Jerry's guitar. These sounded less harsh on the Sanyo than the HK. Jerry's voice also sounds pretty brittle on this, the Sanyo seemed to fill this in with a bit more sweetness. My sense was that the Sanyo was a bit more of a lush and full tone, nicely musical, while the HK was a bit more accurate and dynamic... not clinical, but maybe a bit more clinical by comparison.

"Killing me Softly"
This track had the clearest differences between the HK and the Sanyo. That haunting intro felt a bit more ethereal on the Sanyo, the sense of reverb and and the diffuseness of the voices was really noticeable, you could hear Roberta on the left channel, but the back-up singers and the quiet music seemed to be coming from all around. Again, there's maybe a bit more lushness, this could also be interpreted as a less precise soundstage, but it worked well on this track in particular. The biggest difference though, was when that kick drum comes in. At a pretty decent volume (louder than I normally listen) the first couple of kick drum hits kind of went splat on the HK, then they tightened up (I think they're backed off in the mix). At a similar volume, the kick drum hits were where much tighter on the Sanyo. This isn't terribly surprising though, considering the 40w difference in rated power output. I'd give this track a clear win to the Sanyo.

"Natural Mystic"
With the Sanyo Bob sounded lost a bit in the mix, with the HK he seemed much more present. I turned it up enough on this track that the bass got a bit out of control... there were some things rattling with the volume knob at 12:00, it was uncomfortably loud. Preferred the HK here because of noticeably more present vocals.

"Ready and Able"
I love this track. The honk of Ronnie Cuber's bari sax just burns it up. Sounded really nice and musical, and tight on the Sanyo. Again, maybe giving up a bit more detail and separation to the HK.

Overall first impressions are positive. Certainly pleasant and musical. I think the HK is definitely better when it comes to separation and reproducing the higher frequencies, and I think it's a bit more dynamic. But, of course, sometimes on some tracks, there can be too much separation and the musicality suffers.

I'd also add that the phono stage in the Sanyo was noticeably quieter than on the HK (in terms of extraneous noise, not gain). This might have something to do with the difference in separation and dynamics between the two. Interesting to see if that holds up when I get a chance to listen to some CDs.

Also, as this is the longest i've listened to these speakers in a while, I'm reminded of just how good they are, and how much I like them. The only reasons I bought the Wharfedales is because there's just no good place in my relatively small living room to put the big PSBs.
 
So I've spent maybe an hour or so listening to it, a few records and a couple of CDs. Both channels sound nice and clean.

But I was just futzing with the tuner, and the right channel is all sorts of crackly. Any ideas to trouble shoot that?
 
I got one of those today. Bulbs light up, but no output. HiFi engine has a KR service manual which shows fuses. I can't find any fuses in this one .Power switch is junk too.
 
Back
Top Bottom