G22000 - Let's see what's in there - clean, recap & crank

OK, time to get my new G22000 ready for action!

When I got this the other day one channel didn't work. I verified that the power amp was OK by switching the RCA's around so I figured it was likely just a dirty switch (which I'm told are common for these) or some other minor aspect such as a cracked solder joint.

First step - figure out how to open this thing up. Quite simple - just remove a zillion screws on the sides, back and under side.

Once open I sprayed plenty of deoxit on the pots and switches and then some faderlube to keep them working smoothly.
Apparently the cleaning fixed the inoperable channel.

While I was in there I let my OCD recapping disorder take over and I replaced about 2 dozen of the electrolytics that I could reasonably get to (and that I had in stock).

I was surprised to see that the 2 phono boards each had 3 caps on the underside. One was a 1uf electrolytic which I replaced with a film cap and the other was a pair of 47uf caps in series which was the equivalent of a 23.5uf bipolar. I replaced that with a single 22uf Nichicon Muse cap. I also recapped the "Flat Amp" PCB's.

Over on the tone board I replaced a bunch of electrolytics as well. I found the PCB had 2 - 10uf caps in series to simulate a 5uf bipolar. I replaced those with a single bipolar 4.7uf Muse and a jumper.

The 5 PCB's I recapped where plug ins. One of the pins (the easiest one to get to) was soldered in and was easy to remove once I heated up the connection. I didn't touch any of the caps in the tuner section.

One of the bulbs was toasted. This uses an unusual/nonstandard "round" bulb. I replaced that with a 12 volt wedge bulb that I soldered wire leads onto.

Next I cleaned the faceplate with some "Brasso" polish. Normally when I clean a faceplate I first soak in some soapy water in the kitchen sink but this wasn't all that dirty and besides, it wouldn't fit in the sink.

A wipe down of the knobs and switch toggles and back together for the test - sounds great!

And then finally for the hard part - carrying it upstairs to the bedroom, hook it up to my Polk Monitor 7Bs, Pioneer PL-707 TT and Kyocera DA-310cx CDP.
Oh, and bolt the 2 halves together.

Sounding good! Looking great - can't wait for my wife to come home and marvel at our new (back-up) bedroom stereo system.

After a few weeks I'll open up the power amp section for a look-see and to tweak the bias pots.

JimB

Nice.
A little overkill for a bedroom system, isn't it?

Rob

Robisme said:

Nice.
A little overkill for a bedroom system, isn't it?
Rob

Click to expand...

Nah, we like to rock it !
Besides, the other one is only" an SX-1250.

Does the 22000 have the separate amp section?

DaWoofer said:

Does the 22000 have the separate amp section?

Click to expand...

Yes.
You can bolt it together like I did with 4 - 8mm x 12mm metric bolts or you can run them separately. Even as 2 parts each is quite large. The interconnecting cable is about 1-meter long. There is a channel between them where the excess cabling can be stored.

Congratulations on a beautiful piece of equipment.

Very nice bedroom system there. My question is about the "Brasso" polish you used for the faceplate. Any cautions about using this product? I want to polish my G-8000, and other faceplates as well. Will this work well for my SX-1250, and others? Any concerns about lettering coming off? Thanks.

Have you had a chance to form any impressions between the Sansui and your SX-1250? Once again, very nice :thmbsp:

The Brasso seems to do a fine job on the polished and anodized surfaces. I rub with the grain to apply and remove. I haven't had problems with it removing the lettering but I have little doubt that it would be capable of doing so. Rub the areas with lettering quite gently!

I have not had a chance yet to form an opinion regarding the Sansui versus the Pioneer. Plus I have them on different speakers so that adds another element.
The Sansui is seriously huge though; it makes the Pioneer look normal-sized in comparison!

So what if it's overkill, it's fun! I ran the G22K I had in the bedroom in the apartment we had years ago, driving Polk Monitor 4's of all things. (Want to make small nearfield monitors really tight and articulate? Put a monster amp on 'em.) There still might be pics of that beast on here, would have been '03 or '04. I had found it up the street from where we were at a yard sale for all of $20(!) It had seen better days, but it did play and after a good cleaning it sounded really good. The amp connector was torn away from the chassis and the chassis metal where the connector mounted was torn partially away! Ended up trading it to another AK'er for a stack of Luxman separates which I still own, but seeing your G22K brought back some fond memories of that monster. The tuner was especially amazing, there weren't many stations that could escape its grip with just a dipole.

Todd in Cheesecurdistan