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Re: DX9 - 4op elder statesman (sysex and videos)
Thanks for your message. This group can use some more activity :-)
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Have you checked https://yamahadx9.com Very interesting website for any DX9 owner! MT Verzonden vanaf mijn Huawei mobiele telefoon -------- Oorspronkelijk bericht -------- Onderwerp: [YamahaDX] DX9 - 4op elder statesman (sysex and videos) Van: "glenjdiamond via groups.io" Aan: [email protected] Cc: ??? ? <----- click here for a google share with videos and sysex from my DX9. |
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DX9 - 4op elder statesman (sysex and videos)
??? ? <----- click here for a google share with videos and sysex from my DX9.
I have to admit - back in the day when I had a DX21, during the 80s, I went over a work colleagues home as he had told me that he had a DX9 in the living room.? I was intrigued.? I think I probably laughed until he told me it was 16 note polyphonic and has access to all of the fine tune ratios that the DX21 didn't ( boo !!!! ).? ? Wasn't until March 2020 that I got one for myself and am pleasantly surprised.? ?Since then I have been making my own patches and modifying those that load from mk1 DX7 patches.? The DX9 shares a similar engine to the original DX7.? I have some videos that demo the DX9 sounds through a behringer foot pedal.? The videos show my laptop desktop which has a Reaper spectrum analyser running.? The videos have been posted to youtube but they are also on a google drive share along with the sysex.? If any of you want to audition the sysex it will work on a DX9 and probably on an original DX7.? If anyone has any amazing DX7 mk1 patches they would like to share with me, I wouldn't mind having a bash at seeing how they load on the DX9.? I have noticed that very few of the public domain sysex loads on the DX9.? Probably as they use parameters like fixed ratios that the DX9 can't work out perhaps??? ??? ?? |
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Re: TX802 power supply issues
开云体育Hi Bob,
take care with switching power supplies
: many of them do not work properly when they are not connected to
a load. In some extreme cases, the power supply can even be
damaged as it can not regulate properly (the output capacitors can
be charged over their voltage limit)
So if you want to test the power supply
without connecting it to the synth main board, the best thing to
do is to put a dummy load on the main output (+5V in most cases).
Loading the power supply at 25 or 30% is enough most of the time
to allow the regulation to operate properly (so if the power
supply can deliver 1A on 5V for example, adding a 22 ohms/2W
resistor is enough to load the power supply. Take care however :
such a resistor becomes really hot !)
Benoit
Le 19/11/2020 à 15:59, Gunter Weeks via
groups.io a écrit?:
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Re: TX802 power supply issues
开云体育Just a quick question, I replaced the
Caps when testing the 5 V side its reading 7V. Ive checked the
Switched side and there is a signal on the optical Isolator.
Ive pulled all the Transistors and put
them in a Tester and they all read ok
Question, Does there need to be a load
on the 5V line before the switching takes effect or Do I need to
look further?
REgards
Bob
On 13/11/2020 15:36, Grant B wrote:
On the main board, probably not. Some Yamaha things have +-18v on the power supply that is further regulated to +-15 on the main board, but those parts won't be under as much stress as the PSU caps. You could take a look for leakage or swelling on those if you like. I've never personally needed to replace those.
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Re: TX802 power supply issues
开云体育On the main board, probably not. Some Yamaha things have +-18v on the power supply that is further regulated to +-15 on the main board, but those parts won't be under as much stress as the PSU caps. You could take a look for leakage or swelling on those if you like. I've never personally needed to replace those.Anything that is suspect on the PSU should be changed. I've had a couple of small signal resistors and ceramic caps on the PSU that were eaten away. You might not know until you start the removal and cleaning of the PSU. GB On 11/13/2020 7:22 AM, Gunter Weeks via
groups.io wrote:
Just a quickie, |
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Re: TX802 power supply issues
Just a quickie,
Ive ordered all the Power supply Caps. Is it worth re-caping the main board It sounds fantastic No humm etc.. Do I need to replace all the other type of Capacitors too? Whilst Im doing this I thought I would re-cap my Original 1979 Korg MS20 Had it since new and this is starting to hum and there are a few driy joints on the board which I thought I would re-flow at the same time. Regards |
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Re: TX802 power supply issues
开云体育Hi Gunter ? It worked brilliantly for my DX7ii – works as new now? ? Regards ? Stu ? |
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Re: TX802 power supply issues
Bad filter caps may explain what you described so replacing them makes sense. I would leave the power resistors alone. Op di 10 nov. 2020 om 21:47 schreef Gunter Weeks via <bob.weeks=[email protected]>: Good Evening (Well it is here) |
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Re: TX802 power supply issues
Hi,
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I had a similar issue and replaced all of the electrolytics on the power supply board, which solved the problem. jb Am 10.11.2020 um 21:46 schrieb Gunter Weeks via groups.io <bob.weeks@...>: |
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Re: TX802 power supply issues
开云体育Not sure where this response is going to end up, but ... I have seen a lot of Yamaha 80's era stuff dying recently. In all cases so far it's the switching power supply they use. In the luck cases I just replaced all the electrolytics and cleaned the brown glue off the board. In worse cases I had to replace other passives. In the worst case there were other parts I could not find and had to make a wholesale replacement of the power supply. Since yours is working, I would suggest replacing all the electrolytics in the power supply. It's inexpensive parts-wise (like, under $20USD). These supplies are switch mode and they run very hot typically. I am NOT a pro-recap person in the least, but in some cases it is required. So far I think I've done a REV7, two SPX90's and a DX7S. I can't remember if there are others or not.GB On 11/10/2020 12:46 PM, Gunter Weeks
via groups.io wrote:
Good Evening (Well it is here) |
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TX802 power supply issues
Good Evening (Well it is here)
I have some issues with my 802, Some times it would boot and some times I got a initial boot screen and then it would dim.? After a power cycle it would work. However, two weeks ago it wouldn't pass the boot screen. The circuit diagram gives +5 and +15 however my power board gave 4.6 and 14.3. After tweaking the pot Im now back up to 5/15V however, this took quite a turn. So This brings on a question why did the voltage drop is it bad caps? and how long can I use this before it start failing again and I need a tweak to Max... So I recon i have to recap the power supply and replace the large 1W power resistors. Any other pointers? |
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Re: DX7ii-FD, SysEx, and Computers.... JSynthLib
开云体育Hi all - Geoff Having looked further into the issue?with JSynthLib that you reported, it would seem that the legacy Java SE 6 runtime (Java for OS X 2017-001) is an absolute requirement on OS X 10.15.x. You can get that from As Andy has previously mentioned: for this to work, the application bundle labeled version 1.0 from must be used. One more thing… in the Preferences window, ensure that the correct MIDI driver has been selected. There you have it! E? |
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TX802
开云体育Thanks all, This one hit the spot.
Bob
(Not sure whey I'm down as Gunter...)
lol
On 23/10/2020 09:19, Florian Anwander
wrote:
Hi
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Yamaha TX816 Service Manual in HD
Good news everyone ! </farnsworth> I've posted this into a different group but thought it could be useful to let all of you know about it since some of you might also got a TX along with your DX7 ! Many
years ago, as I started my journey into this FM synths deep rabbit
hole, I've been welcomed by friendly people from next to my home to the
other side of the ocean and I got many helpful answers to my many
questions. Time passes and now it's time for me to give back to all of you and especially to Daniel Forró whom gave me precious tips and documentation to fix my TX816 back in the days. Without further ado I have the honour of releasing a better quality (600x600dpi) scan of the TX816 service manual in full including it's oversize schematics ! I bought it on the web few months ago along some other rare Yamaha documents (that I intend to scan also) and it took me few hours of scanning and stitching (and few minutes of swearing also). I hope that it'll help anyone who have to fix or enhance this mighty Yamaha workhorse ! You'll find the link here: (as the schematics are 40MiB and the manual 125MiB I couldn't upload them here, feel free to copy/host them elsewhere) This put an end to a quest I started 3 years ago to get a better quality PDF of this manual in order to facilitate my repairs on my TX, I'm happy that it ended. I don't ask for any payback of course this is all free for you get ! <shameless plug> I just want to add that to this day I've got a near complete TX516 with 3 missing modules to complete my TX816
so if you got working or defective TF1 units that you'll be ready to
spare I'll be happy to talk with you about them ! I fix electronic
consoles and music gear so dead units won't be a to much of a problem. </shameless plug> Anyway have a nice day and keep the spirit of the FM alive ! Long live Yamaha FM ! Jonas |
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Re: Message from the owner
开云体育
Hi,
Here is what I found.
Best.
Jo?l ELIS?
?Jamais un homme heureux n'a troublé?la paix d'une réunion, prêché?une guerre, ou lynché?un Noir.?
Aucune femme heureuse n'a jamais cherché?noise à?son mari ou à?ses enfants.
Jamais un homme?heureux n'a commis un meurtre ou un vol.
Jamais un patron heureux n'a fait peur à?ses employés.?
De : [email protected] <[email protected]> de la part de Gunter Weeks via groups.io <bob.weeks@...>
Envoyé : jeudi 22 octobre 2020 12:06 ? : [email protected] <[email protected]> Objet : Re: [YamahaDX] Message from the owner ?
Hi All,
Does anyone have a copy of the Tx802 Circuit diagram? I haev teh service schedule but it only has the power supply. I think I need a recap Over the past few months booting has been steadily more unreliable I get partial boot then it freezes and re powering the device gets it working, until last week I only get a partial boot now and then a lock up. So if you have a pdf of the 802 I would be grateful Bob |
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Re: Message from the owner
开云体育If you would just adjust some of the group settings, like to accept html, it’d make this look like a new group. And still cost zero. ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Richard Gelderblom
Sent: Thursday, October 22, 2020 10:12 AM To: [email protected] Subject: [Special] [YamahaDX] Message from the owner ? Hi group ! As a reminder, here are some of the benefits of the Premium plan: ? ·???????? Ability to directly add people to your group ·???????? Expanded storage space ·???????? Ability to accept donations ·???????? Premium support If you find something changed or isn't working (anymore) pls. let me know. |
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Re: Message from the owner
Hi All,
Does anyone have a copy of the Tx802 Circuit diagram? I haev teh service schedule but it only has the power supply. I think I need a recap Over the past few months booting has been steadily more unreliable I get partial boot then it freezes and re powering the device gets it working, until last week I only get a partial boot now and then a lock up. So if you have a pdf of the 802 I would be grateful Bob |
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Message from the owner
Hi group !
I just got an email that this group is 'downgraded' to free level. This means at least that there are no costs involved keeping this group alive (yay !) What it means wrt (extra) functionality remains to be seen but we still got enough storage space so that's no problem for now. This is from the email : As a reminder, here are some of the benefits of the Premium plan: ?
We can then discuss if it's important enough to start a funding action or not. Regards, Richard Gelderblom |
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