• 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

SA 9800. Finally got one

SolutionRoom

SolutionRoom

...***...
SA-9800. Finally got one (Dec 8, 2011 Work Finally Began)

Finally. After 2 years of searching, I found I nice clean SA 9800. It powers on, but has no sound. Looking forward to making her sing again.
 
Last edited:
Register to hide this ad
Without power on, inspect the amplifier boards for TO-92 transistors with a visibly thicker center collector lead, then check it's solder joints. Then look for burned or even slightly off color resistors. Reference back to the schematic for any resistor marked with a triangle to check for signs of heat.

They are probably 2sa912's and 2sc1885's.

A tipoff, a red red brown 220 ohm resistor where the center red looks more like the brown than the red.

You'll probably end up changing 4 TO-92 transistors in the amps over to TO-126 transistors for the heat dissipation capability.

The 2sa726's should come out too, to ksa992's.
 
Pick up one about nine months ago. Great amp. Has a lot of features. Check to see if you have the pre-amp bars in the back. Sometimes when you get one the bars are not there. If they are not, you will not have sound.
 
avionic said:
:worthless

http://www.kallhovde.com/pioneer/sa-9800sm.pdf

Does the protect relay "click" shortly after power on?
Click to expand...

No. It does not... and I know that is a definite issue. And yes... I also know pictures are an AK'rs best friend. I will try and get a few soon. It has been a VERY busy weekend due to the NAMM trade show in Anaheim. Thanks for the sm link.

markthefixer said:
Without power on, inspect the amplifier boards for TO-92 transistors with a visibly thicker center collector lead, then check it's solder joints. Then look for burned or even slightly off color resistors. Reference back to the schematic for any resistor marked with a triangle to check for signs of heat.

They are probably 2sa912's and 2sc1885's.

A tipoff, a red red brown 220 ohm resistor where the center red looks more like the brown than the red.

You'll probably end up changing 4 TO-92 transistors in the amps over to TO-126 transistors for the heat dissipation capability.

The 2sa726's should come out too, to ksa992's.
Click to expand...

Thanks Mark for the initial insight. I have yet to get a chance to really look at it. I did however take the top and bottom covers off and give it a pretty good look. It is definitely bone stock, even all of the output transistors and wire ties are original. The boards are in great shape with just a little darkness around those heat sinked transistors. It had a moderate layer of undisturbed dust inside of it in all areas that you would expect, which was a great thing to see.

Hunt55 said:
Pick up one about nine months ago. Great amp. Has a lot of features. Check to see if you have the pre-amp bars in the back. Sometimes when you get one the bars are not there. If they are not, you will not have sound.
Click to expand...

The pre-amp/amp jumpers are there.

I will give it a better look eventually, once things settle down here.
 
Last edited:
I recently got some 1/8" stainless rod, to bend into "U" jumpers. Interested?
 
Pics

OK. Was able to snap a couple of photos. Thanks Mark, but I have the jumper bars in place on this one. Not cleaned up at all, but I dusted off a little on the top surface, but have not done anything else other than look. The finger marks in the dust on the bottom cover are mine, in happiness that it had not been removed previously.
 

Attachments

  • DSC00713.jpg
    DSC00713.jpg
    83.5 KB · Views: 174
  • DSC00715.jpg
    DSC00715.jpg
    117.4 KB · Views: 148
  • DSC00717.jpg
    DSC00717.jpg
    102 KB · Views: 119
  • DSC00718.jpg
    DSC00718.jpg
    79.5 KB · Views: 116
  • DSC00719.jpg
    DSC00719.jpg
    124.2 KB · Views: 145
Haste Makes Waste...

I was so absolutely busy and overwhelmed this weekend that my initial half-a%&ed assessment was dead wrong. Once I got to really check out the 9800 a few minutes ago, it is FULLY FUNCTIONAL! The Protection Relay clicks in, and every function, pot and switch on it works as advertised. A touch of static when turning a couple of the pots, like the balance, but it is fully operational. And it sounds absolutely beautiful. (I rarely use the word beautiful, but it is the right word here)

Good to start with a functioning amp and recap it and change out some select components than to try and fix this beast in addition to replace parts. I am VERY happy about this discovery.

Not quite sure when I will take on the task, but now that I know what the task is, it makes it more painless and enjoyable.

Here's a pic (sorry it's upside down, but you get the idea) of those fluorescent meters at work...
 

Attachments

  • DSC00722.jpg
    DSC00722.jpg
    78.9 KB · Views: 112
I have never heard this particular amp but I will say these amps,especially in wood are perhaps the most beautiful int amps ever made.Enjoy as you have one fine piece of equipment.
 
SolutionRoom said:
I was so absolutely busy and overwhelmed this weekend that my initial half-a%&ed assessment was dead wrong. Once I got to really check out the 9800 a few minutes ago, it is FULLY FUNCTIONAL! The Protection Relay clicks in, and every function, pot and switch on it works as advertised. A touch of static when turning a couple of the pots, like the balance, but it is fully operational. And it sounds absolutely beautiful. (I rarely use the word beautiful, but it is the right word here)

Good to start with a functioning amp and recap it and change out some select components than to try and fix this beast in addition to replace parts. I am VERY happy about this discovery.

Not quite sure when I will take on the task, but now that I know what the task is, it makes it more painless and enjoyable.

Here's a pic (sorry it's upside down, but you get the idea) of those fluorescent meters at work...
Click to expand...

Glad you have it up and running. The 9800 is very soothing. I am experimenting with the 9800, Pioneer A-90 and Pioneer A-80. I am listening to each about three months to determine which one I like. Started with the A-80 and I am on the A-90 now.

Hunt55
 
Yes. It's in really good condition. I can't wait to get started on re-capping it and deoxiting it to get her back to perfect operating shape. Even though the case is actually in pretty good condition, I will likely build a custom case, as I did for my SX-3900 and SA-9100 I did recently.

I will have to scour AK to find the cap list(s) and other tidbits on what I should replace on it. I have some ideas after doing the SX-3900 (being a non-switching amp design as well) on some additional components that I might want to replace (trim pots, resistors, transistors and such), but I will reach out to the pros on AK here to see if I'm in the ballpark or not. Any advice is gladly accepted and highly appreciated...
 
That is fine looking amp, and I'll second the notion this line of Pioneer is the best looking ever. I don't have a 9800, but a SA-8800 is my daily driver, and I think the SQ on it is better than my other amps or vintage Pioneer receivers (SX-1050, 980, Yammy CA-810, to name a few). The only nit on these is the faux wood case, which I haven't taken the time (or learned how) to make a decent replacement for yet.
 
SolutionRoom said:
Yes. It's in really good condition. I can't wait to get started on re-capping it and deoxiting it to get her back to perfect operating shape. Even though the case is actually in pretty good condition, I will likely build a custom case, as I did for my SX-3900 and SA-9100 I did recently.

I will have to scour AK to find the cap list(s) and other tidbits on what I should replace on it. I have some ideas after doing the SX-3900 (being a non-switching amp design as well) on some additional components that I might want to replace (trim pots, resistors, transistors and such), but I will reach out to the pros on AK here to see if I'm in the ballpark or not. Any advice is gladly accepted and highly appreciated...
Click to expand...


The old list in your thread has been updated a bit since you used it, post the list here with all the (my) unordered bupkus edited out so only the parts to be ordered are present, and I'll double check against the 3900's I just finished doing.

I DID drill a few holes for neater installation of the presently available idle current trimpots.

BTW, ever do the UKL's on the 9100, and does the noise still exist?
 
Last edited:
markthefixer said:
The old list in your thread has been updated a bit since you used it, post the list here with all the (my) unordered bupkus edited out so only the parts to be ordered are present, and I'll double check against the 3900's I just finished doing.

I DID drill a few holes for neater installation of the presently available idle current trimpots.

BTW, ever do the UKL's on the 9100, and does the noise still exist?
Click to expand...

Yeah. I just figured that the 9800 is quite similar to the 3900... and based off your response I guess I am good in that assumption. I will look at that thread and see what it says. I know there were updates to the list on the fly as we worked on it.

I didn't really have any issue with those idle current trim pots, just dog-legged the pins a bit and good to go. I guess I could dremel some holes in the pcb if need be. Your key words may be "presently available"... indicating holes may be required.

And no... unfortunately I have not been able to do a thing on the 9100(s) on the bench. Although I will. I recently broke a finger (about a month ago now) and that has taken me completely out of the drumming realm for a bit, so I 'might' be able to find a bit of time to replace those caps in that 9100. I will try to set aside some time soon.
 
Last edited:
lico said:
That is fine looking amp, and I'll second the notion this line of Pioneer is the best looking ever. I don't have a 9800, but a SA-8800 is my daily driver, and I think the SQ on it is better than my other amps or vintage Pioneer receivers (SX-1050, 980, Yammy CA-810, to name a few). The only nit on these is the faux wood case, which I haven't taken the time (or learned how) to make a decent replacement for yet.
Click to expand...

I hear you on the case not being the best feature of these machines. I am a definite lover of real wood, and hardwoods especially (exotic hardwoods if necessary, affordable, or obtainable). Here is a link to a photo album from my SX-3900 and SA-9100 rework projects, where you can see some good pictures of the cases.
http://solutionroom.shutterfly.com/
 
Back on Track with the 9800

I am back on the 9800. It is the only item on the bench right now with full focus. I have tested all functions, and they all work properly, with some clicking on switch throws and static on pot turns here and there.

I took the top and bottom covers and shield covers (x2) off and the faceplate and deoxited (D5) all switches and pots THOROUGHLY. Been just doing some general cleaning up of the unit. I will check the power supply board voltages to see where it stands tomorrow (I hope). And take a closer look at the caps and start comparing my actual 9800 to the current list(s).

Here we go...!
 
SolutionRoom said:
Yes. It's in really good condition. I can't wait to get started on re-capping it and deoxiting it to get her back to perfect operating shape. Even though the case is actually in pretty good condition, I will likely build a custom case, as I did for my SX-3900 and SA-9100 I did recently.

I will have to scour AK to find the cap list(s) and other tidbits on what I should replace on it. I have some ideas after doing the SX-3900 (being a non-switching amp design as well) on some additional components that I might want to replace (trim pots, resistors, transistors and such), but I will reach out to the pros on AK here to see if I'm in the ballpark or not. Any advice is gladly accepted and highly appreciated...
Click to expand...
Hi, I would like to get the measurements and some photos of the inside of the case, so I can build one for my SA-9800.

Cheers
 
You must log in or register to reply here.

Similar threads

kydog
Back in rotation...Fluroscan gear...
Replies
18
Views
2K
kydog
kydog
M
cannot hear the difference of the SA-9800
2
Replies
21
Views
3K
jessbob
jessbob
PioneerShawn
Who's the best Pioneer Rehab guy here?
2
Replies
29
Views
4K
blhagstrom
blhagstrom
F
SA-8800 II vs. SA-8800 (fluorescent display) as compared to SA-9800
Replies
6
Views
4K
GlasgowGrip
GlasgowGrip
camaroZ28
SA-9800 hook up to SPEC 2
Replies
6
Views
1K
camaroZ28
camaroZ28
Back
Top Bottom