DX100 preset gibberish

This section is for all variants of the Yamaha DX series. DX1/DX100/DX11/DX21/DX27/DX27S/DX5/ DX7/DX7IID/DX7IIFD/DX7S/DX9/TX81Z/TX7

Moderators: Derek, parametric, Saul

User avatar Great Britain
cake100
Member
Member
Posts: 11
Joined: Sun Jul 15, 2018 5:55 am
Contact:

DX100 preset gibberish

Unread post by cake100 » Mon Jan 07, 2019 4:27 pm

Hi,
I picked up a DX100 just over a year ago. It was in a cupboard unused for over 10 years apparently.
Yesterday, I turned it on to get into using it and remembered that many of the presets did not play and had no readable names assigned to them (before and after a factory reset).
Check the video link below which shows them some of the same presets appear on different banks; e.g. say A5 is also C11.
I did a factory reset and nothing changed.
Also yesterday, I saw a message saying the battery needed replacing. One of the first things I did when I got it was put in a new battery. So, I was surprised seeing that message (given they apparently last over a decade). I opened it up and checked the battery with a voltmeter. It was normal.
Turning it on the message was gone, but the presets were as they are now.

One other thing, after turning it on, should the welcome screen show the message "Welcome to DX ! > " ?

Any suggestions?
Cheers.

https://www.flickr.com/photos/140286814 ... ateposted/
User avatar Great Britain
cake100
Member
Member
Posts: 11
Joined: Sun Jul 15, 2018 5:55 am
Contact:

Re: DX100 preset gibberish

Unread post by cake100 » Mon Jan 07, 2019 6:47 pm

It seems I was doing the factory reset incorrectly.
I had read online that in the third part you press the [-1/No] button.

In fact it should be this [+1/Yes]
A la this procedure (found on these forums):
DX27


Factory Reset Procedure


WARNING: All user-stored data (User Voices, MIDI settings) will be deleted. If the current settings and data are not expendable, create a backup before executing the Factory Reset. This can be done by performing a ''Bulk Dump'' to an external MIDI storage device or by saving the user-stored data to cassette.


Turn OFF the keyboard.
Press and hold down Voice buttons [1] and [2] while turning ON the keyboard. The display prompt, 'Test Mode Entry?' appears.
Press the [+1/YES] button once.
Turn OFF the keyboard.
Turn ON the keyboard. The keyboard will be reinitialized to the original factory settings.
Haven't tested the sounds yet. But the presets are named.
Hopefully, it works OK.
User avatar Great Britain
cake100
Member
Member
Posts: 11
Joined: Sun Jul 15, 2018 5:55 am
Contact:

Re: DX100 preset gibberish

Unread post by cake100 » Tue Jan 08, 2019 5:58 pm

After a day, I Just turned it on, and the gibberish returned.
I did another reset and it is normal.

I assume, I'll need to do a factory reset every time I turn it on after a long break with it turned off.

Has anyone had this issue before?
Cheers.
User avatar Germany
Miks
Specialist Moderator
Specialist Moderator
Posts: 1852
Joined: Fri Oct 31, 2008 1:00 am
Contact:

Re: DX100 preset gibberish

Unread post by Miks » Tue Jan 08, 2019 7:39 pm

cake100 wrote:One of the first things I did when I got it was put in a new battery. So, I was surprised seeing that message (given they apparently last over a decade). I opened it up and checked the battery with a voltmeter. It was normal. Turning it on the message was gone, but the presets were as they are now.
Hhhmmm - myself I'm not familiar with the DX100 - but to me it seems as if there may be a cracked solder joint or a hairline crack (broken trace?) somewhere so that sometimes the battery voltage gets disrupted on its way to the internal memory chips (RAM) IC12&13. The battery power must reach Pin24 of that chips. Check for continuity and see if carefully applying a little pressure to the mainboard here and there might show up an issue here...

P.S. Do you already have the schematics and the service manual?
My (key related) gear (in alphabetical order):
Ferrofish: B4000+
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
User avatar Great Britain
cake100
Member
Member
Posts: 11
Joined: Sun Jul 15, 2018 5:55 am
Contact:

Re: DX100 preset gibberish

Unread post by cake100 » Thu Jan 10, 2019 6:12 pm

Thanks for the response.

I looked at all the solder joints linked to the battery and eventually saw one of the joints soldered to the battery holder I had soldered in just after I got the DX100, had a tiny bit of movement. I de-soldered and re-solderd and it seemed to have fixed the issue.
I also have the manuals.
Cheers.
User avatar Germany
Miks
Specialist Moderator
Specialist Moderator
Posts: 1852
Joined: Fri Oct 31, 2008 1:00 am
Contact:

Re: DX100 preset gibberish

Unread post by Miks » Thu Jan 10, 2019 6:46 pm

cake100 wrote:
Thu Jan 10, 2019 6:12 pm
Thanks for the response.

I looked at all the solder joints linked to the battery and eventually saw one of the joints soldered to the battery holder I had soldered in just after I got the DX100, had a tiny bit of movement. I de-soldered and re-solderd and it seemed to have fixed the issue.
Glad to hear that it seems to be fixed - I'll cross my fingers on that. :)
I also have the manuals.
(Y)
My (key related) gear (in alphabetical order):
Ferrofish: B4000+
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
Post Reply

Return to “Yamaha DX & TX Forum”