• 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

HELP !! Right Channel distortion G 8000

Originally posted by dr*audio
I have to clean my G8000 periodically also. It seems to be the only weak point of an otherwise outstanding receiver. The fact that I have it in the basement doesn't help either! I have found a new cleaner which does a really good job on cleaning the controls: Greentree Generation 2000 super Contact Cleaner, available at www.mcmelectronics.com. I follow it up with De-Oxit.
If cleaning doesn't work, I am in Cleveland, OH and I can fix it, so PM me if interested.
Click to expand...

Yes, it does seem strange that this particular receiver (G-xxxx series?) has this cruddy/scratchy control issue. On the positive side, however, we are able to keep it under control and as a result get to enjoy what I consider the pinacle of the Sansui reciever - the grossy oversized G-22K and G-33K notwithstanding.

I think the G-8000 and G-9000 are just about the most ideal balance of glamor, finction and power.

Can ya tell I like it a lot? :D

Paul
 
Originally posted by dr*audio
I have to clean my G8000 periodically also. It seems to be the only weak point of an otherwise outstanding receiver. The fact that I have it in the basement doesn't help either! I have found a new cleaner which does a really good job on cleaning the controls: Greentree Generation 2000 super Contact Cleaner, available at www.mcmelectronics.com. I follow it up with De-Oxit.
If cleaning doesn't work, I am in Cleveland, OH and I can fix it, so PM me if interested.
Click to expand...


I may have to take you up on that, my brother lives up there and will be visiting him soon....Michael...
 
Thanks again Paul.:) Now all I need to do is order the stuff that dr.audio recommended. Hopefully I won't have anymore problems with the G-8000 as I'm in the process of trying to get the G-22000. And MJ Clemmer, I hope you get yours working also.
 
GOT MY G-8000 back...WOW
Hey guys ,just wanted to let you all know, thanks SO much for ALL of the help on my 8000, Echo wars and others pointed me in the right direction for the recovery of this WONDERFUL reciever. I had a local tech check it out (I am NOT the least bit an electrician, and know nothing about Caps, resistors, etc...) and told him what ALL of you told me to check, and BOOM !!! EchoWars and Morden2004 were 100% correct with the problems and the tech fixed them ALL!!!!!!!, After bringing it home, hooked up the ADC EQ and cd player (to the AUX...LOL) and then the HPM 100s.....HOLY COW !!!! that thing ROCKS ! I can not believe how GREAT this thing is .... I dont know HOW to thank you all for the help....thanks GUYS....

PS: to my brother Russ....Thanks .. this thing will BLOW ya away... now you need the 9000, or the 22000...LOL..., even though you got me with the JBLs.....
 
Originally posted by MJ Clemmer
GOT MY G-8000 back...WOW
Hey guys ,just wanted to let you all know, thanks SO much for ALL of the help on my 8000, Echo wars and others pointed me in the right direction for the recovery of this WONDERFUL reciever. I had a local tech check it out (I am NOT the least bit an electrician, and know nothing about Caps, resistors, etc...) and told him what ALL of you told me to check, and BOOM !!! EchoWars and Morden2004 were 100% correct with the problems and the tech fixed them ALL!!!!!!!, After bringing it home, hooked up the ADC EQ and cd player (to the AUX...LOL) and then the HPM 100s.....HOLY COW !!!! that thing ROCKS ! I can not believe how GREAT this thing is .... I dont know HOW to thank you all for the help....thanks GUYS....

PS: to my brother Russ....Thanks .. this thing will BLOW ya away... now you need the 9000, or the 22000...LOL..., even though you got me with the JBLs.....
Click to expand...

Told 'ya!!! The G-8000 (& G-9000) is just about the greatest piece of stereo equipment ever.

I can just sit and look at mine all day. It has a tireless audio quality about it - playing FM quietly in the background while I work or mashing my ear drums on Pink Floyd or a Tchaikovsky symphony.

Paul
 
Hey , the 8000 is great, BUT NOW the left channel is dropping out intermitently, when it does, i tap the volume know and playwith it , then it starts working again..... SO i gonna start your way of the knob turning and cleaning...Hope it works....Ill let you know.....Michael...
 
Best of luck. Here's what's required to get to the controls for cleaning. :D

(If you just want to do the volume, you might be able to cut some corners)
 
:jawdrop: AWWWWWWWWW GOD !!!!! :drunk: that DOES scare the H$%& out of me !!!!! OMG !I am PRAYING that I do NOT have to go through that, matter of fact I can NOT do that, it would give me a heart attach !!! lOOKS LIKE ITS GONNA GO TO THE SHOPIF IT CONTINUES.....:cry: help !!....mICHAEL...!!!!!!!!!!!
 
Try flipping the connected/separated switch.

A common cause of intermittant channel drop out on Sansuis that have them is a dirty connected/separated switch. It is next to the speaker terminals on the G-8000. You only have to loosen the phillips screw holding the clear plastic slide stop/cover. Make sure that the volume is all the way down or the power is off when you flip the switch a time or two, returning it to the 'connected' position (all the way to left).

However, it really needs to be cleaned with a quality contact cleaner or Caig DeOxit. This is no simple task on that receiver. You have to get the circuit board that the switch is mounted to out enough to spray the internal contacts of the switch. And that board is pretty well buried, IIRC.

That switch is a common part on the AU-517/717 & AU-519/819/919 and no longer available.

RobV
 
These receivers never get the switches and pots cleaned simply because of the insane difficulty to get to the damn things. Even Pioneer's worst unit is no match for the G8000/9000.

Guess I just wanted you to know what you're getting into. Sorry...
 
Originally posted by EchoWars
These receivers never get the switches and pots cleaned simply because of the insane difficulty to get to the damn things. Even Pioneer's worst unit is no match for the G8000/9000.

Guess I just wanted you to know what you're getting into. Sorry...
Click to expand...

I agree 100%!

But on a positive note I fixed mine which exhibited all the classic noise/low vol on 1 channel/etc. problems by working each and every switch and potentiometer daily - several times each day - for perhaps three weeks before it ALL went away. My G-8000 seldom exhibits any noise and never drops a channel. A few times a switching noise has crept in - and I just work that switch until it's clean. Don't be agressive though!

So, not withstanding the horror at discovering what appears to be serious faults in the G-8000/9000, I believe that the quality of the switches and pots in these units are good but lack of use is the primary reason they seem to collect dust/dirt/acid rain/cigarette smoke/beer breath. (OK, that last one may be a stretch :D )

Paul
 
Morden2004 said:
Well, that cleaning routine is as follows:

1) With the unit unplugged, clean all the pots and switches (and those PRE OUT/MAIN IN jumpers) using a good contact cleaner like Do-Oxit.

2) With the unit still unplugged, work each and every control, switch and jumper several times - but not overly fast or aggressively. Remember, these are vintage units and we don't want to break things. Just make sure you have cycled everyting through all positions and ranges a dozen times or more.

With the power back on; and volume set LOW and a pair of not-so-important speakers connected :p: continue .....

3) Work all switches as above thru several cycles; for pots (volume, balance etc.) I usually run a few cycles with NO pressure on the shaft, then a run a few cycles with a gentle PULL on the shaft (don't pull the knobs off :D ) and then a few cycles with a gentle PUSH on the shaft. This is necessary to put more mechanical pressure on the wiper arm so that it wipes more effectively while in the cleaning cycle.
NOTE: You may have to re-apply contact cleaner if, after a week or two of #3, the problem(s) do not appear to be getting better.

I do this every day until all signs of channel drop-out, scratching volume noises and switching static is gone.

It can take anywhere from a couple of days (my AU-999, for example was noise free on the 3rd day) or a couple of weeks (my G-8000 took nearly three weeks of this procedure) to become bug free.

If there are circuit problems (e.g. DC Balance is off or BIAS is incorrect) then this proceudre won't cure that. But by getting all the mechanical components clean and noise free you can then better assess the remaining problems.

Good luck!

Paul
Click to expand...
My AU-919 seems to have an enclosed volume pot. How can I clean it?
 
Morden2004 said:
I agree 100%!

But on a positive note I fixed mine which exhibited all the classic noise/low vol on 1 channel/etc. problems by working each and every switch and potentiometer daily - several times each day - for perhaps three weeks before it ALL went away. My G-8000 seldom exhibits any noise and never drops a channel. A few times a switching noise has crept in - and I just work that switch until it's clean. Don't be agressive though!

So, not withstanding the horror at discovering what appears to be serious faults in the G-8000/9000, I believe that the quality of the switches and pots in these units are good but lack of use is the primary reason they seem to collect dust/dirt/acid rain/cigarette smoke/beer breath. (OK, that last one may be a stretch :D )

Paul
Click to expand...
I'm pretty sure mine has the beer breath problem!
 
mlavka said:
My AU-919 seems to have an enclosed volume pot. How can I clean it?
Click to expand...

If you have the issue where sound keeps dropping from one channel, the first place to start is with the preamp out- main amp in switch, its the same as on the G-9000/8000, AU-717 etc... Just slide the switch back and forth and it usually clears up the issue. A good internal cleaning certainly helps, but even so, it usually comes back, eventually. Thats why its best to just keep the small locking plastic piece off, and whenever it acts up, just slide the switch back and forth a few times.

The main concern on the 919 series is the 'black flag' caps, which is also in the BA-F1 (a 919 in power amp form with the same unique power out transistors). If your 919 still has them, its highly recommended that it be removed & replace.

Black Flag Caps

Black Flag Caps
conradhoffman.com
 
I have a AU-217 and want to give it a good cleaning with Deoxit. Where exactly do I spray on all the switches?
 
You must log in or register to reply here.
Back
Top Bottom