DX7 firmware upgrades (all models)

This section is for all variants of the Yamaha DX series. DX1/DX100/DX11/DX21/DX27/DX27S/DX5/ DX7/DX7IID/DX7IIFD/DX7S/DX9/TX81Z

Moderators: Derek, parametric, Saul, Fozzer

ajstan99
Posts: 8
Joined: Wed Mar 15, 2017 10:18 pm

Re: DX7 firmware upgrades (all models)

Unread postby ajstan99 » Tue Apr 18, 2017 8:16 pm

Miks wrote:@ ajstan99:

Check your PM... :wink:

Thanks a bunch, Miks! I'll let you know how it goes!

User avatar
Miks
Specialist Moderator
Specialist Moderator
Posts: 1247
Joined: Fri Oct 31, 2008 1:00 am
Contact:

Re: DX7 firmware upgrades (all models)

Unread postby Miks » Tue Apr 18, 2017 9:21 pm

ajstan99 wrote:Thanks a bunch, Miks! I'll let you know how it goes!

You're welcome! :D
My (key related) gear (in alphabetical order):
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500, TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade

ajstan99
Posts: 8
Joined: Wed Mar 15, 2017 10:18 pm

Re: DX7 firmware upgrades (all models)

Unread postby ajstan99 » Wed Apr 19, 2017 5:35 pm

Many thanks, Miks, it worked! Successfully upgraded from 1.3 to 1.9.

The test program showed "29v" which I think means that the battery is at 2.9v not 3.0v and needs to be changed. Not bad for 30 years, though!

After the DX7-II work is completed, I'm off to update my E-mu Proteus/1, which still has the v1.00 firmware as I received one of the first units that shipped.

User avatar
Miks
Specialist Moderator
Specialist Moderator
Posts: 1247
Joined: Fri Oct 31, 2008 1:00 am
Contact:

Re: DX7 firmware upgrades (all models)

Unread postby Miks » Wed Apr 19, 2017 7:08 pm

ajstan99 wrote:Many thanks, Miks, it worked! Successfully upgraded from 1.3 to 1.9.


Excellent - glad you've got it working (Y)

ajstan99 wrote:The test program showed "29v" which I think means that the battery is at 2.9v not 3.0v and needs to be changed.


If the battery voltage drops below 2.8 volt the battery should be replaced. But if you replace it now you're good for another 20 years or more... :wink:

The DX has a coin cell (CR2032) with solder tags and is soldered onto the mainboard.

If you're going to replace the battery I strongly recommend to use a battery holder - makes it easier to swap the coin cell in future should the need arise. I've done this 'surgery' to all my synths that had 'soldered' batteries.

Here's an example of what holder I used:

https://www.reichelt.de/Batteriehalter- ... ANGUAGE=EN

Now you can go for a 'common type' CR2032 coin cell... :mrgreen:
My (key related) gear (in alphabetical order):
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500, TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade

ajstan99
Posts: 8
Joined: Wed Mar 15, 2017 10:18 pm

Re: DX7 firmware upgrades (all models)

Unread postby ajstan99 » Thu Apr 20, 2017 3:52 pm

If you're going to replace the battery I strongly recommend to use a battery holder - makes it easier to swap the coin cell in future should the need arise. I've done this 'surgery' to all my synths that had 'soldered' batteries.

Thanks, Miks, I think I'll give it a try soon. I was able to desolder a CR2032 holder from an old PC motherboard. The pins are wider (20mm, which seems to be standard) than the holes on the DX7 logic board (wish I would have measured while I had it cracked open) but I'm thinking I could either add a short wire to each pin to make it work, or use longer wires to run it to a more convenient location as I've seen in a post on this site.

User avatar
Miks
Specialist Moderator
Specialist Moderator
Posts: 1247
Joined: Fri Oct 31, 2008 1:00 am
Contact:

Re: DX7 firmware upgrades (all models)

Unread postby Miks » Thu Apr 20, 2017 4:04 pm

This may solve many 'battery holder placement issues':

https://oshpark.com/shared_projects/xdfK07Ms
My (key related) gear (in alphabetical order):
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500, TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade

ajstan99
Posts: 8
Joined: Wed Mar 15, 2017 10:18 pm

Re: DX7 firmware upgrades (all models)

Unread postby ajstan99 » Thu Apr 20, 2017 9:17 pm

Miks wrote:This may solve many 'battery holder placement issues':

https://oshpark.com/shared_projects/xdfK07Ms

Cool, I just ordered 3 (minimum order) for only $4.50 with free shipping. If you don't mind, I have a couple of additional questions:

1. Would you recommend using pins like this or something else to connect to the DX7 logic board? I might just try scrounging something from an existing motherboard or I/O card I have lying around.
http://www.ebay.com/itm/10-pcs-40-Pin-2 ... 2248284546

2. Did you mount yours on the same side of the board as the original battery, or to the back so you don't have to take the logic board out to change the battery next time?

Again, I really appreciate the assist on this one.

User avatar
Miks
Specialist Moderator
Specialist Moderator
Posts: 1247
Joined: Fri Oct 31, 2008 1:00 am
Contact:

Re: DX7 firmware upgrades (all models)

Unread postby Miks » Thu Apr 20, 2017 10:10 pm

ajstan99 wrote:1. Would you recommend using pins like this or something else to connect to the DX7 logic board? I might just try scrounging something from an existing motherboard or I/O card I have lying around.

Well - If I were using one of these battery holder pcb's I would take (a) short piece(s) of massive wire - let's say 0.6mm cross section (don't know how much that is in inches...) I suppose that type of wire will give more mechanical stability to that kind of 'construction... but with a pair of flexible wires you're free to mount it elsewhere. Maybe a splash of hot glue can hold it in place... :wink:

2. Did you mount yours on the same side of the board as the original battery, or to the back so you don't have to take the logic board out to change the battery next time?

I mounted the holders at the same place the battery was soldered before - if you mount it 'to the back' there may be the risk of a short-circuit due lack of space between the battery (holder) and the backplate... 8O - to be checked... 8)
My (key related) gear (in alphabetical order):
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500, TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade

grantb5
Member
Member
Posts: 30
Joined: Tue Aug 30, 2011 7:12 pm

Re: DX7 firmware upgrades (all models)

Unread postby grantb5 » Thu Apr 20, 2017 10:38 pm

Ideally you want a firm pin of some kind because of the weight and interaction with the battery. The stronger the better. Otherwise use wires and mount the board someplace nearby like on the case using double-sided foamy tape or velcro.

ajstan99
Posts: 8
Joined: Wed Mar 15, 2017 10:18 pm

Re: DX7 firmware upgrades (all models)

Unread postby ajstan99 » Thu Apr 20, 2017 10:52 pm

Thanks, guys. Good info. Appreciate it!


Return to “Yamaha DX Forum”

Who is online

Users browsing this forum: No registered users and 1 guest