gmane.music.equipment.yamaha-dx

Re: Re: TX802 noise issue

Yvonne R — 2013-06-18T13:34:07

Do the caps FIRST ... its a)Cheaper, b) About time they were changed and 
will do no harm (might even fix it).

Remember Caps are used a LOT to de-couple noise on power supply rails ... 
and THAT is what your fault sounds (no pun) like ..




At 12:51 18/06/13 +0000, you wrote:

Re: TX802 noise issue

truth_dk — 2013-06-18T12:51:13

Thanks for your replies Daniel & Narfman, all great advice.
I have run tests and resets and had no changes. I think the DAC is worth looking at because the noise is on all outputs including headphones, even when all voices are turned off, and I'll get the caps replaced if there's any luck with the DAC.

Thanks again and keep up the great work.


--- In YamahaDX< at >yahoogroups.com, Narfman96 - Narfland Studio <narfman96< at >...> wrote:

Re: TX802 noise issue

Narfman96 - Narfland Studio — 2013-06-18T02:03:45

It may be the DAC or an op amp in the demux/sample and hold part of the outputs. Do the individual outputs and the headphone output have this same noise? I had this happen to a Kawai K5 and bit 16 had a cold solder joint on the DAC. Since you're in N.Z. there's no way I would be able to look at it. I'm in the U.S.  :-(


>

Re: TX802 noise issue

Daniel Forró — 2013-06-17T17:22:41

I'm sorry to hear about your problems. It's difficult to say what is  
it, but lot of issues can be repaired if only it's not caused by  
special IC failure. As I know Yamaha keeps spare parts only for 10  
years, so if there's such failure there's hardly any chance to repair  
it (except using of another non-working piece).

First I would try to perform test and reset of the instrument. Maybe  
it can help when the problem was caused by software, and it can tell  
where is the problem. Have you done this?

Then it's always good to open the machine and reseat all IC's in  
sockets, pull out and return all connectors (one by one). If contacts  
are oxidized which is quite possible after so many years, this can help.

Recapping can hardly cause some problem, and capacitors are not  
expensive, so that's the next step. Problem can be with electrolytic  
and tantalum caps. Start with PSU, if this is not enough and there's  
still some problem, change electrolytic caps on other boards,  
especially those in volta

TX802 noise issue

truth_dk — 2013-06-17T14:07:28

Since there's been a bit of talk about the TX802 lately, especially with regards to replacing the old capacitors, I thought I'd ask if anyone's had the same issue I have.

My machine recently started outputting (on stereo outs, headphones and individual outs) a low-level and digital-sounding noise, as if many notes were going on and off at once. 
The noise/notes will change both over time and depending on which patches are selected, which initially had me thinking it must be a chip and therefore unfixable unless I find another TX802. However after testing a little I realized that any notes played via MIDI do not seem to be affected by the noise (they will play normally and louder than the noise) and also if I turn all 8 voices off the noise doesn't change, so maybe it actually is a capacitor issue?

I paid a Yamaha dealer too much money to have a look at and and tell me it's unfixable, without actually being able to tell me which components were the issue.

Anyone experienced something similar (the dealer as

Re: TX802 Patches

Daniel Forró — 2013-06-17T04:20:10

and of course this one:

http://www.motifator.com/

Daniel Forro


On 17 Jun, 2013, at 12:43 PM, Mike Ward wrote:

Re: TX802 Patches

Daniel Forró — 2013-06-17T04:15:40

There's search service on Yahoogroups - I have found 9 groups in  
English and 1 in Italian for Motif.

Good Yamaha instrument groups with nice people are also here:

http://www.yamahaforums.co.uk/forum/viewforum.php?f=60

Daniel Forro


On 17 Jun, 2013, at 12:43 PM, Mike Ward wrote:

Re: TX802 Patches

Mike Ward — 2013-06-17T03:43:43

s there a Yamaha Motif 6 group? Ijust acquired one and wondered if there is a group.

maha 

________________________________
 From: narfman96 <narfman96< at >yahoo.com>
To: YamahaDX< at >yahoogroups.com 
Sent: Sunday, June 16, 2013 8:57 AM
Subject: [YamahaDX] TX802 Patches

I uploaded the sysex dumps from the rare TRC-03 ROM cartridge Yamaha made for the TX802 to the YamahaBlackBoxes group. There are 1-32 and  33-64 voices and 1-64 performances all configured to use the internal banks. This cartridge is labeled Percussion and S.E. As we know FM drums and cymbals are usually pretty lame. Some of the electric toms and of course the bells and chimes are outstanding. The special effects are neat using the pitch envelopes and FM trickery. 

I'm looking for more patches for this beast. If Ian is still out there can I post your work??? I have some ideas for a few new banks I just need some time. I realize that any of the gazillion DX7 voice patches can be loaded but it's the performances and function parameters that

Re: Re: tx802 success

charlie midi gfa — 2013-06-16T18:23:33

nothing like that dust smell  
drying off the oil 
klinging to new components
while warming up ,,,
similar to that tube smell from old guitar amps?
charlie


  
----- Original Message ----- 
From: "Sean Kearns" <sean< at >thekearnsfamily.org>
To: <YamahaDX< at >yahoogroups.com>
Sent: Sunday, June 16, 2013 11:15 AM
Subject: Re: [YamahaDX] Re: tx802 success

Re: Re: tx802 success

Sean Kearns — 2013-06-16T15:15:45

congo rats on the resurrection!

BTW, the smell you may be experiencing may be the De-Oxit on the 
circuits, (or baking soda, or....) I have noticed that I get a different 
smell than my typical linseed oil/Hammond Oil smell after I clean 
drawbars with De-Oxit.


Standard Legal disclaimer:
  your mileage may vary, please consult a physician before engaging the 
tx802 in strenuous activity, objects may sound closer than they appear, 
may cause potential hearing loss, Temporal loss may also occur after 
initial use, Not for rebroadcast without the expressed written consent 
of the National Football League, Do not operate heavy machinery after 
use, take with plenty of water, may cause drowsiness, irrability, or 
both...

Re: tx802 success

rawl47 — 2013-06-16T14:56:02

Curtis,

Congrats on your success.  You have breathed new life into classic electronics.

There was some discussion about sources of electrolytic capacitors here so please share where and how you obtained your new caps for the benefit of the rest of the group.

Thanx,
Rawl

--- In YamahaDX< at >yahoogroups.com, "curtis" <curtiskilfoy< at >...> wrote:

TX802 Patches

narfman96 — 2013-06-16T13:57:56

I uploaded the sysex dumps from the rare TRC-03 ROM cartridge Yamaha made for the TX802 to the YamahaBlackBoxes group. There are 1-32 and  33-64 voices and 1-64 performances all configured to use the internal banks. This cartridge is labeled Percussion and S.E. As we know FM drums and cymbals are usually pretty lame. Some of the electric toms and of course the bells and chimes are outstanding. The special effects are neat using the pitch envelopes and FM trickery. 

I'm looking for more patches for this beast. If Ian is still out there can I post your work??? I have some ideas for a few new banks I just need some time. I realize that any of the gazillion DX7 voice patches can be loaded but it's the performances and function parameters that make the TX802 the  Yamaha black box that it is.

Sorry for the YBB cross post,  Fran

Re: Re: tx802 success

Daniel Forró — 2013-06-16T11:51:32

Recently I also change all electrolytic and tantalum capacitors in my  
numerous machines older than approx. 20 years (including TX802).

Modern electrolytic capacitors are usually smaller than old ones.

Just avoid cheap Chinese. Use better Nichicon, Jamicon or Panasonic  
for temperature 105.

Daniel Forro


On 16 Jun, 2013, at 8:42 PM, curtis wrote:

Re: tx802 success

curtis — 2013-06-16T11:42:36


is that so? well, the replacement caps are all slightly smaller than the originals. hope that's not an issue as long as they're the same Uf/V rating?

Mo P.

Re: tx802 success

Jill Saphic — 2013-06-16T05:27:52

Nice job on the fix!
Isn't it neat the first time you turn on a TX-802
and hear the sound sounds for real that we've been playing
samples or romplers imitating for a long time?
Mine doesn't have any smells, and I had the top off
to check the battery, and powered it on and no smells.
But I do have another module I've had for some time,
and it has the "electric' smell. But it never gets overly hot,
never smokes, or gets the "burning electrical" smell.

--- On Sat, 15/6/13, curtis <curtiskilfoy< at >yahoo.com> wrote:


From: curtis <curtiskilfoy< at >yahoo.com>
Subject: [YamahaDX] tx802 success
To: YamahaDX< at >yahoogroups.com
Date: Saturday, 15 June, 2013, 22:58



  



did a full Power supply re-cap on my tx802 today, the first time I've attempted anything of the sort (the most desoldering i've done prior to this is switching out the CR2032 on this and my YS200 for a holder). 

I also got a TON of rust off the chassis with some baking soda paste. 

For the corroded outputs I used Caig Industries De-Oxit, we'll see if it

Re: tx802 success

NormanD — 2013-06-16T01:03:50

NO.

don't worry.

Just wallow in the 'classic' aroma of real gear.

It's very subtle, but, we've all morophed away from it, to the almost smelless presence of the SMD environment of post 93-ish electronics.

A less well known fact is that the surface area of components has been calculated into the 'power factors' of them. Our old kit has massive surface areas and so it emits massive electrical honk.

Personally, I love it. The only alarm I'd respond to would be if I could smell something burning.

norman.  

--- In YamahaDX< at >yahoogroups.com, "curtis" <curtiskilfoy< at >...> wrote:

tx802 success

curtis — 2013-06-15T21:58:16

did a full Power supply re-cap on my tx802 today, the first time I've attempted anything of the sort (the most desoldering i've done prior to this is switching out the CR2032 on this and my YS200 for a holder). 

I also got a TON of rust off the chassis with some baking soda paste. 

For the corroded outputs I used Caig Industries De-Oxit, we'll see if it gets much corrosion off.

In any case, I didn't break it! It turns on and sounds EFFING GREAT! I'm very very excited!

The power supply still gives off an electrical smell, though not a burning one. It smelled this way before the re-cap, too. Almost like a tube amp smell. Is this natural as the synth heats up or should I worry?

Mo P.

Re: from BigFatDrum...about dx11 osc post

Eb Mayat — 2013-06-15T11:15:43

Glad to hear that. If you have any questions, feel free to ask. Eb

________________________________
 From: bigfatdrumboom <scg< at >yosemite.net>
To: YamahaDX< at >yahoogroups.com 
Sent: Friday, June 14, 2013 5:54 PM
Subject: [YamahaDX] from BigFatDrum...about dx11 osc post

dude Thanks for that info!!
trying it this weekend to see all it can do!
ive been using all my synths on the ipad alot, including the dxi,
anxious to see if it can control that too.
Thanks again Eb!

Re: from BigFatDrum...about dx11 osc post

David Bulog — 2013-06-14T22:12:21

Anyone have a complete service manual for DX-21, DX-100 thanks

________________________________
 From: bigfatdrumboom <scg< at >yosemite.net>
To: YamahaDX< at >yahoogroups.com 
Sent: Saturday, 15 June 2013 9:54 AM
Subject: [YamahaDX] from BigFatDrum...about dx11 osc post

dude Thanks for that info!!
trying it this weekend to see all it can do!
ive been using all my synths on the ipad alot, including the dxi,
anxious to see if it can control that too.
Thanks again Eb!

from BigFatDrum...about dx11 osc post

bigfatdrumboom — 2013-06-14T21:54:56

dude Thanks for that info!!
trying it this weekend to see all it can do!
ive been using all my synths on the ipad alot, including the dxi,
anxious to see if it can control that too.
Thanks again Eb!

Re: Re: MIDI pedals for PC messages

Eb Mayat — 2013-06-14T12:25:59




________________________________
 From: Antoine Alary <antoine_alary< at >yahoo.com>
To: YamahaDX< at >yahoogroups.com 
Sent: Thursday, June 13, 2013 10:26 PM
Subject: [YamahaDX] Re: MIDI pedals for PC messages
 


  
This ebay listing for a TC electronic G-minor MIDI Footswitch seems to be exactly what you are looking for:
http://www.ebay.com/itm/TC-electronic-G-minor-MIDI-Footswitch-/271220614015
--
Hello Antoine.
Yes, thank you. Interesting also is that the G-major effects rack has a MIDI Thru socket so patch-specific effects blocks can also be called simultaneously with every PC. 

<http://www.youtube.com/watch?v=S6EJy5zLuXo>


Many thanks for your suggestion. 
Eb