Selling my Yamaha DX7II-FD

开云体育

I think I'm finally done with my Yamaha DX7II-FD. It's time to sell it. I thought I'd ask members of this group if they had any advice or experience as to where. Would Reverb.com be better than EBay, for example, or is there somewhere else that would make more sense? It's in very good condition for its age, has the E! Board update, includes a ROM and RAM cartridge, and I'm pretty sure I can still dig up all the original manuals and stuff to go along with it. I think the only thing that has fallen apart over the years is the optional breath controller I purchased, but the jack still works. I'm not sure I know where to sell it or what to ask, so any advice would be helpful. Cheers!

Re: DX7II-D white noise problem

#21016

You might find this thread I started a while back interesting: /g/YamahaDX/topic/tx802_troubleshooting/96731773

In that case it was a broken EGM IC. Yours sounds different but it could be the same problem.

Op zo 26 mei 2024 om 16:37 schreef csabi via <csabi=[email protected]>:

Show quoted text

Dear Friends
I would like to ask for your help.
I have recently purchased a faulty DX7II-D model, which is producing the problem you can hear in the YouTube video below.?

The battery is 2.9V, I upgraded the ROM to v.:1.9 firmware, I don't have a cartridge for it, so I loaded the INTERNAL memory contents via MIDI, but unfortunately no change. What is worrying is that the noise also comes in test mode (as shown in the video) instead of the 880 Hz test tone. The power supply voltages are fine. Do you think this is the kind of error that could be produced by a PCM54 DAC failure? I'm afraid not. It is reacting to the pitch bender, this seems more like a structural fault, which unfortunately could probably be a fault in the EGM or OPS chips. What is your opinion?

Thanks in advance!

Greetings from Hungary!

Re: DX7II-D white noise problem

#21015

开云体育

Hello

I cannot tell what is the cause of this behaviour, but it looks like there is an extremely high feedback on the operator 2 (I think it is operator 2, which allows feedback - I don't own a Mk2). At least your example with the tubular bells in the beginning of the video shows, that the sound becomes tonal in the release phase. I'd check to which value the feedback is set.

Florian

Am 26.05.24 um 16:37 schrieb csabi@...:

Show quoted text

Dear Friends
I would like to ask for your help.
I have recently purchased a faulty DX7II-D model, which is producing the problem you can hear in the YouTube video below.?

The battery is 2.9V, I upgraded the ROM to v.:1.9 firmware, I don't have a cartridge for it, so I loaded the INTERNAL memory contents via MIDI, but unfortunately no change. What is worrying is that the noise also comes in test mode (as shown in the video) instead of the 880 Hz test tone. The power supply voltages are fine. Do you think this is the kind of error that could be produced by a PCM54 DAC failure? I'm afraid not. It is reacting to the pitch bender, this seems more like a structural fault, which unfortunately could probably be a fault in the EGM or OPS chips. What is your opinion?

Thanks in advance!

Greetings from Hungary!

DX7II-D white noise problem

#21014

Dear Friends
I would like to ask for your help.
I have recently purchased a faulty DX7II-D model, which is producing the problem you can hear in the YouTube video below.?

The battery is 2.9V, I upgraded the ROM to v.:1.9 firmware, I don't have a cartridge for it, so I loaded the INTERNAL memory contents via MIDI, but unfortunately no change. What is worrying is that the noise also comes in test mode (as shown in the video) instead of the 880 Hz test tone. The power supply voltages are fine. Do you think this is the kind of error that could be produced by a PCM54 DAC failure? I'm afraid not. It is reacting to the pitch bender, this seems more like a structural fault, which unfortunately could probably be a fault in the EGM or OPS chips. What is your opinion?

Thanks in advance!

Greetings from Hungary!

PRACUTIONS AND TIPS BEFORE RE SWITCHING ON (2nd)

#21013

开云体育

In all American-Canadian electric power systems, and probably the rest of the world also, there is a color code for the 3 man wires (and these wires are also often called “leads”). ?The?black?wire is where the main electricity flows, and it's usually called the “hot wire. ?Then there is a “neutral” wire which is wire that used to be the “ground" wire in the 2-lead system. ?The 2nd wire is supposed to be?white. ?But when a better third “grounding” wire was added to make the "3-lead” system, that “grounding” wire is always?supposed?to be green. ?Modern-day professional electricians always adhere to this 3-color code when installing new electrical systems, but older electrical systems (and newer systems installed by non-professionals who aren't properly trained) are sometimes sloppy about adhering to this color code. ?And sometime amateurs use wires that are not even the right colors to begin with.

Most power issues where you get a shock in A.C. power is caused by the two main wires (the black and white wires) being reversed from what they should be. ?In the days when there wasn't a third wire, just reversing the plug in the wall solved the problems. ?The third wire was added to stop the problem from happening in the first place. ?But even when plugs with this third wire are being used, some older?“2-lead" wiring still exists somewhere in the power supply system. ?Finding where the two main wires are reversed from what they should be will solve the problem.

Sometimes you can run a wire from under the “head” of any external screw that holds the instrument together to a similar screw on another instrument or other metal device associated wi the power supply and sometimes the shock will stop. ?You have to experiment around and try out various different connections to test things to see if they work as a temporary “stop-gap” measure at solving the problem. ?(This technique can also work for audible "buzzes" and “hums” in analog audio cables also, even electric guitars, and microphone stands and holders .)

Catch ya later. ?Bye for now.

Dan.

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21012

开云体育

Hello Valeri,

most of us are not native english speakers assumingly, so no problem with that.

Does it happen also, when you have nothing connected to the TX7 (no audio, no MIDI)?

If yes, then this is most likely an issue with your electrical mains installation, and not an issue of the TX7 oder other gear.
If it happens only when the TX7 is connected to other gear (either by an audio cable or a MIDI cable), then the security issue quite likely is at the other gear.

This might be a real life endangering thing. So be very careful!

Florian

Am 02.05.24 um 12:06 schrieb C十:

Show quoted text

Sorry sir，English is really not my native language.?

When I turn on the power switch on the 1080, I can feel a slight electric sensation when I go to touch the 1080 and other devices. I can confirm that the problem is caused by my jv1080, but I don't know what causes it!

torsdag 2 maj 2024 skrev Florian Anwander via <fanwander=[email protected]>:

Hello

What do you mean with "Leakage from all devices"? Some noise or some physical fluid?

btw: If English is not your native language, then write your question in detail in your own language and have it translated into English by

Florian

Am 02.05.24 um 08:12 schrieb googdyamaha:

My yamaha tx7 has a small amount of leakage from all devices when I turn it on and when I turn the tx7 off, the leakage goes away. What is causing this and can any experts explain? (There is nothing unusual about the tx7, the only problem is just a little leakage) I have no problems with my home circuits.

?

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21011

When I turn on the power switch on the tx7, I can feel a slight electric sensation when I go to touch the tx7 and other devices. I can confirm that the problem is caused by my tx7, but I don't know what causes it!

Sorry，It's not 1080, it's tx7.

torsdag 2 maj 2024 skrev googdyamaha via <valerizimlichxxc21=[email protected]>:

Show quoted text

Sorry sir，English is really not my native language.?

When I turn on the power switch on the 1080, I can feel a slight electric sensation when I go to touch the 1080 and other devices. I can confirm that the problem is caused by my jv1080, but I don't know what causes it!

torsdag 2 maj 2024 skrev Florian Anwander via <fanwander=mnet-online.de@groups.io>:

Hello

What do you mean with "Leakage from all devices"? Some noise or some physical fluid?

btw: If English is not your native language, then write your question in detail in your own language and have it translated into English by

Florian

Am 02.05.24 um 08:12 schrieb googdyamaha:

My yamaha tx7 has a small amount of leakage from all devices when I turn it on and when I turn the tx7 off, the leakage goes away. What is causing this and can any experts explain? (There is nothing unusual about the tx7, the only problem is just a little leakage) I have no problems with my home circuits.

?

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21010

Sorry sir，English is really not my native language.?

When I turn on the power switch on the 1080, I can feel a slight electric sensation when I go to touch the 1080 and other devices. I can confirm that the problem is caused by my jv1080, but I don't know what causes it!

torsdag 2 maj 2024 skrev Florian Anwander via <fanwander=[email protected]>:

Show quoted text

Hello

What do you mean with "Leakage from all devices"? Some noise or some physical fluid?

btw: If English is not your native language, then write your question in detail in your own language and have it translated into English by

Florian

Am 02.05.24 um 08:12 schrieb googdyamaha:

My yamaha tx7 has a small amount of leakage from all devices when I turn it on and when I turn the tx7 off, the leakage goes away. What is causing this and can any experts explain? (There is nothing unusual about the tx7, the only problem is just a little leakage) I have no problems with my home circuits.

?

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21009

开云体育

Hello

What do you mean with "Leakage from all devices"? Some noise or some physical fluid?

btw: If English is not your native language, then write your question in detail in your own language and have it translated into English by deepl.com

Florian

Am 02.05.24 um 08:12 schrieb googdyamaha:

Show quoted text

My yamaha tx7 has a small amount of leakage from all devices when I turn it on and when I turn the tx7 off, the leakage goes away. What is causing this and can any experts explain? (There is nothing unusual about the tx7, the only problem is just a little leakage) I have no problems with my home circuits.

?

PRACUTIONS AND TIPS BEFORE RE SWITCHING ON (1st)

#21008

开云体育

Don't get it all wet in the first place. ?

(TeeHee! Sorry, couldn't resist.)

Catch ya later. ?Bye for now.

Dan.

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21007

My yamaha tx7 has a small amount of leakage from all devices when I turn it on and when I turn the tx7 off, the leakage goes away. What is causing this and can any experts explain? (There is nothing unusual about the tx7, the only problem is just a little leakage) I have no problems with my home circuits.

?

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21006

No it's not the battery. The battery is only there to be able to save sounds.

It can be alot of things. Faulty outputs etc. Have you tried the headphone output?

Show quoted text

On Fri, 19 Apr 2024, 15:42 googdyamaha via , <valerizimlichxxc21=[email protected]> wrote:

A few days ago I wanted to lower the temperature of the rectifier but it was too hot for me to touch it, so I thought I could put a cooling fan on the vacant C6 socket, as I don't know the voltage very well the fan spun quite fast causing me to be a bit scared, after 1 second it stopped spinning, when I connected the fan again the fan stopped responding ........ Finally, I noticed that the relay no longer sounded when I turned it on and the buttons were silent. I thought the relay had burned out, so I violently removed the cover of the relay with pliers, but then I suddenly realized that the two 0.75A fuses on the DC power board had blown. I replaced the fuses and everything was back to normal. Now my relay has no cover and the cover is damaged. You can check the fuses.

Den tors 18 apr. 2024 kl 13:08 skrev raj juggapah via <rajdata01=[email protected]>:

Dear All World Class Musicians Owners of DX7

I have one DX7 Keyboard that was off the power grid for more than 5 years.

Switched On all functions appear normally on the screen

Sound ....none ......is it the battery ofr anything else, [pls help.

Else the unit is physically perfect solid state .

Please advise on precautions and tips to make it work like in the 80's .
Many Thanks to all of you,

With kind regards,
Raj?
Mauritius

On Thursday, April 18, 2024 at 05:38:16 AM GMT+4, Daniel Forró via <danforcz=[email protected]> wrote:

Yes, this is general fact. But I suppose he wants to know the relation between DX7 parameter value and BPM, Hz, msec. Here is a table…

Daniel Forró

On Apr 18, 2024, at 6:57, LarryS <vision1@...> wrote:

LFO is measured in cycles per second (Hz).
60 seconds in a minute, so:
One? cycle per second (Hz) = 60 BPM
Therefore LFO x 60 = BPM
BPM/60 = LFO Hz
120BPM/60 = 2hz?
?
?
?
From:?[email protected]?[mailto:[email protected]]?On Behalf Of?josechobernabe@...
Sent:?Wednesday, April 17, 2024 2:40 AM
To:?Martin Tarenskeen;?[email protected]
Subject:?Re: [YamahaDX] LFO Speed in BPM and some LFO tricks
?
Hi Martin,

I can not find the file with the LFO speed BPM relation. Would it be possible to re send it or send a link or something? It would be really helpful. Thanks a lot in advance!!?

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21005

A few days ago I wanted to lower the temperature of the rectifier but it was too hot for me to touch it, so I thought I could put a cooling fan on the vacant C6 socket, as I don't know the voltage very well the fan spun quite fast causing me to be a bit scared, after 1 second it stopped spinning, when I connected the fan again the fan stopped responding ........ Finally, I noticed that the relay no longer sounded when I turned it on and the buttons were silent. I thought the relay had burned out, so I violently removed the cover of the relay with pliers, but then I suddenly realized that the two 0.75A fuses on the DC power board had blown. I replaced the fuses and everything was back to normal. Now my relay has no cover and the cover is damaged. You can check the fuses.

Den tors 18 apr. 2024 kl 13:08 skrev raj juggapah via <rajdata01=[email protected]>:

Show quoted text

Dear All World Class Musicians Owners of DX7

I have one DX7 Keyboard that was off the power grid for more than 5 years.

Switched On all functions appear normally on the screen

Sound ....none ......is it the battery ofr anything else, [pls help.

Else the unit is physically perfect solid state .

Please advise on precautions and tips to make it work like in the 80's .
Many Thanks to all of you,

With kind regards,
Raj?
Mauritius

On Thursday, April 18, 2024 at 05:38:16 AM GMT+4, Daniel Forró via <danforcz=[email protected]> wrote:

Yes, this is general fact. But I suppose he wants to know the relation between DX7 parameter value and BPM, Hz, msec. Here is a table…

Daniel Forró

On Apr 18, 2024, at 6:57, LarryS <vision1@...> wrote:

LFO is measured in cycles per second (Hz).
60 seconds in a minute, so:
One? cycle per second (Hz) = 60 BPM
Therefore LFO x 60 = BPM
BPM/60 = LFO Hz
120BPM/60 = 2hz?
?
?
?
From:?[email protected]?[mailto:[email protected]]?On Behalf Of?josechobernabe@...
Sent:?Wednesday, April 17, 2024 2:40 AM
To:?Martin Tarenskeen;?[email protected]
Subject:?Re: [YamahaDX] LFO Speed in BPM and some LFO tricks
?
Hi Martin,

I can not find the file with the LFO speed BPM relation. Would it be possible to re send it or send a link or something? It would be really helpful. Thanks a lot in advance!!?

Re: LFO Speed in BPM and some LFO tricks

#21004

开云体育

Thank you, Martin!

Show quoted text

On Apr 18, 2024, at 20:25, Martin Tarenskeen <m.tarenskeen@...> wrote:

Attached some sheets from my collection of measurements and calculations.

Op donderdag 18 april 2024 om 09:16:27 +02:00:00 schreef Martin Tarenskeen <m.tarenskeen@...>:
P.S.
I have similar tables for Yamaha FB01, DX100/21/27/TX81Z etc. and Reface DX. Somewhere hidden in my messy harddisk archives. The LFO speed range from the FB01 is insane if I remember correctly :-)

MT

Verzonden vanaf mijn Huawei mobiele telefoon

-------- Oorspronkelijk bericht --------
Onderwerp: Re: [YamahaDX] LFO Speed in BPM and some LFO tricks
Van: josechobernabe@...
Aan: Daniel Forró ,[email protected]
Cc:

Exactly Daniel. This was indeed what I was looking for. Thanks a lot!!!
<RefaceDX-LFO-hz-BPM.xlsx><Tx7 LFO to BPM.pdf><DX-LFO-Hz.xls>

Re: LFO Speed in BPM and some LFO tricks

#21003

Wooow. That's really good, Martin!! Thanks a lot. Will definetly try it out.

Re: LFO Speed in BPM and some LFO tricks

#21002

Attached some sheets from my collection of measurements and calculations.

Op donderdag 18 april 2024 om 09:16:27 +02:00:00 schreef Martin Tarenskeen <m.tarenskeen@...>:

Show quoted text

P.S.
I have similar tables for Yamaha FB01, DX100/21/27/TX81Z etc. and Reface DX. Somewhere hidden in my messy harddisk archives. The LFO speed range from the FB01 is insane if I remember correctly :-)

MT

Verzonden vanaf mijn Huawei mobiele telefoon

-------- Oorspronkelijk bericht --------
Onderwerp: Re: [YamahaDX] LFO Speed in BPM and some LFO tricks
Van: josechobernabe@...
Aan: Daniel Forró ,[email protected]
Cc:

Exactly Daniel. This was indeed what I was looking for. Thanks a lot!!!

RefaceDX-LFO-hz-BPM.xlsx

Tx7 LFO to BPM.pdf

DX-LFO-Hz.xls

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21001

Noted with thanks Flo

Will keep all posted

Wish you a great day

KR

Raj

On Thursday, April 18, 2024 at 03:56:37 PM GMT+4, Florian Anwander <fanwander@...> wrote:

Before you start cleaning, check with an oscilloscope or an audio probe, whether there is sound at the input of the volume potentiometer.

On 18.04.24 13:47, raj juggapah wrote:

Hi Flo

That may be possible

How to clean?

KR

Raj

On Thursday, April 18, 2024 at 03:44:29 PM GMT+4, Florian Anwander <fanwander@...> wrote:

Hello Raj,?

then the issue is NOT(!) the patches lost. And quite likely it is not the battery.

Since you seem to be from Mauritius my first suspicion is based on the the sea climate: corroded jacks and/or a corroded volume slider.

Kind regards
Florian

On 18.04.24 13:28, raj juggapah via groups.io wrote:

Hi Florian?

No

Kind regards

Raj

On Thursday, April 18, 2024 at 11:09:47 AM GMT+4, Florian Anwander <fanwander@...> wrote:

Hello Raj,

does the init-Sound work?

Regards
Florian

Am 18.04.24 um 07:08 schrieb raj juggapah via groups.io:

Dear All World Class Musicians Owners of DX7

I have one DX7 Keyboard that was off the power grid for more than 5 years.

Switched On all functions appear normally on the screen

Sound ....none ......is it the battery ofr anything else, [pls help.

Else the unit is physically perfect solid state .

Please advise on precautions and tips to make it work like in the 80's .

Many Thanks to all of you,

With kind regards,

Raj?

Mauritius

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#21000

开云体育

Before you start cleaning, check with an oscilloscope or an audio probe, whether there is sound at the input of the volume potentiometer.

On 18.04.24 13:47, raj juggapah wrote:

Show quoted text

Hi Flo

That may be possible

How to clean?

KR

Raj

On Thursday, April 18, 2024 at 03:44:29 PM GMT+4, Florian Anwander <fanwander@...> wrote:

Hello Raj,?

then the issue is NOT(!) the patches lost. And quite likely it is not the battery.

Since you seem to be from Mauritius my first suspicion is based on the the sea climate: corroded jacks and/or a corroded volume slider.

Kind regards
Florian

On 18.04.24 13:28, raj juggapah via groups.io wrote:

Hi Florian?

No

Kind regards

Raj

On Thursday, April 18, 2024 at 11:09:47 AM GMT+4, Florian Anwander <fanwander@...> wrote:

Hello Raj,

does the init-Sound work?

Regards
Florian

Am 18.04.24 um 07:08 schrieb raj juggapah via groups.io:

Dear All World Class Musicians Owners of DX7

I have one DX7 Keyboard that was off the power grid for more than 5 years.

Switched On all functions appear normally on the screen

Sound ....none ......is it the battery ofr anything else, [pls help.

Else the unit is physically perfect solid state .

Please advise on precautions and tips to make it work like in the 80's .

Many Thanks to all of you,

With kind regards,

Raj?

Mauritius

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#20999

Hi Flo

That may be possible

How to clean?

KR

Raj

On Thursday, April 18, 2024 at 03:44:29 PM GMT+4, Florian Anwander <fanwander@...> wrote:

Hello Raj,?

then the issue is NOT(!) the patches lost. And quite likely it is not the battery.

Since you seem to be from Mauritius my first suspicion is based on the the sea climate: corroded jacks and/or a corroded volume slider.

Kind regards
Florian

On 18.04.24 13:28, raj juggapah via groups.io wrote:

Hi Florian?

No

Kind regards

Raj

On Thursday, April 18, 2024 at 11:09:47 AM GMT+4, Florian Anwander <fanwander@...> wrote:

Hello Raj,

does the init-Sound work?

Regards
Florian

Am 18.04.24 um 07:08 schrieb raj juggapah via groups.io:

Dear All World Class Musicians Owners of DX7

I have one DX7 Keyboard that was off the power grid for more than 5 years.

Switched On all functions appear normally on the screen

Sound ....none ......is it the battery ofr anything else, [pls help.

Else the unit is physically perfect solid state .

Please advise on precautions and tips to make it work like in the 80's .

Many Thanks to all of you,

With kind regards,

Raj?

Mauritius

Re: PRACUTIONS AND TIPS BEFORE RE SWITCHING ON

#20998

开云体育

Hello Raj,?

then the issue is NOT(!) the patches lost. And quite likely it is not the battery.

Since you seem to be from Mauritius my first suspicion is based on the the sea climate: corroded jacks and/or a corroded volume slider.

Kind regards
Florian

On 18.04.24 13:28, raj juggapah via groups.io wrote:

Show quoted text

Hi Florian?

No

Kind regards

Raj

On Thursday, April 18, 2024 at 11:09:47 AM GMT+4, Florian Anwander <fanwander@...> wrote:

Hello Raj,

does the init-Sound work?

Regards
Florian

Am 18.04.24 um 07:08 schrieb raj juggapah via groups.io:

Dear All World Class Musicians Owners of DX7

I have one DX7 Keyboard that was off the power grid for more than 5 years.

Switched On all functions appear normally on the screen

Sound ....none ......is it the battery ofr anything else, [pls help.

Else the unit is physically perfect solid state .

Please advise on precautions and tips to make it work like in the 80's .

Many Thanks to all of you,

With kind regards,

Raj?

Mauritius