.:Music Technologies Group:. - LCD and LED upgrades for synths and drum machines

.:Music Technologies Group:.

Parts and information for engineers, musicians and hobbyists

MTG TurboCPU &
MIDI Patch Changer

LCD & LED
Upgrades

EPROM Data
Library

Misc Parts
For Sale

Old Projects
& Repairs

Community: ~ forum ~ ~ blog ~ ~ videos ~ ~ facebook ~

* LCD and LED Upgrades *
Bring your 80's and 90's gear back to life!

Yamaha DX7 Backlit LCD Kits

This kit replaces the old non-backlit LCD on a Yamaha DX7 with a beautiful new LCD with long-lasting LED backlight.

Everything is included!
Easy to install!
GREEN Kit = No soldering required, only screwdrivers.
BLUE Kit = Soldering required of only one wire. No cuts or jumpers.
Uses same Yamaha LCD connector so no hook-up mistakes!!
Step-by-step instructions.
The back-light is current-limited to protect the DX7 power supply from working too hard.

Where to buy? Please order off my eBay page

I also have the DX7 Special Edition EPROM as well as regular OS EPROMs v1.7 and v1.8 (these fix various OS bugs) and other great chips on my EPROM page. These can be ordered by email/paypal.

Yamaha DX7 7-segment LEDs Kit

This kit replaces the old red (dim) 7-segment LEDs on a Yamaha DX7 with bright new white ones.

These are impossible to find elsewhere (I know -- it's taken me months to track ones down that will work)!!

Includes two single-digit, 7-segment, bright white LEDs.
Uses "roscolux" or "leefilters" colored gels/filters to set the color you want (I will include a couple of good samples!).
Step-by-step instructions included.
The old ones must be unsoldered and the new ones soldered in place -- requires some experience with soldering.

Where to buy? Please order off my eBay page

I also have the DX7 Special Edition EPROM as well as regular OS EPROMs v1.7 and v1.8 (these fix various OS bugs) and other great chips on my EPROM page. These can be ordered by email.

Yamaha TX7 Backlit LCD Kit

This kit replaces the old non-backlit LCD on a Yamaha TX7 with a beautiful new LCD with long-lasting LED backlight.

Everything is included!
Easy to install!
No soldering required, only screwdrivers.
Uses same Yamaha LCD connector so no hook-up mistakes!!
Step-by-step instructions.
The back-light is current-limited to protect the TX7 power supply from working too hard.

Where to buy? Please order off my eBay page

I also have the TX7 OS EPROM v1.4 (fixes various OS bugs) and other great chips on my EPROM page. These can be ordered by email/paypal.

Yamaha RX15 Backlit LCD Kit

This kit replaces the old non-backlit LCD on a Yamaha RX15 with a beautiful new LCD with long-lasting LED backlight.

Everything is included!
Easy to install!
No soldering required, only screwdrivers.
Uses same Yamaha LCD connector so no hook-up mistakes!!
Step-by-step instructions.
The back-light is current-limited to protect the RX15 power supply from working too hard.

Where to buy? Please order off my eBay page

I also have the RX15 OS EPROMs "ver1.1 '84.05.24" and "ver1.1 '84.11.01" (fix various OS bugs) and other great chips on my EPROM page. These can be ordered by email/paypal.

* Older Projects *
Photo	Description
	Lexicon MRC blue LCD. We all know how bad the E.L. backlit LCDs get over the years. The MRC has to be one of the worst. Click. The nice blue color scheme unfortunately filters the LCD brightness a lot too. So these are two photos of a new LED back-lit blue LCD. It was hard to get the exposure right, so I shot two photos instead. Excuse my poor photography skills. This one was a big challenge because of the goofy 74HCTLS logic chips used. The old LCD didn't mind the glitches on the interface, but the modern LCDs sure do. I had to swap out some of the logic to make it work. Anyway looks great! This is a terribly under-rated MIDI control surface. It's super powerful and compact. I also have v2 and v4 EPROMs for the MRC if anyone needs them burned (see my EPROM page). I am looking for v3.x if anyone has them for sale or trade.
	Emu PX-7 blue LCD for a customer. The customer supplied the LCD, I just had to tweak the LED current limit circuit and built a suitable cable. Looks very nice.
	Sequential Circuits Pro One synthesizer modification to change the old red LED to a new blue one. This is very easy to do. Note the flat edge on the LED when you put the new one in place of the old. You should probably change the resistor to a higher value too, or else the newer higher efficiency LED will blind you. See also: http://www.youtube.com/watch?v=2VeTU_nrSwU
	LCD on a Yamaha DX27 synth This synth was a complete refurb. When I got it (insurance write off?) people told me to wear a mask when working on it. It was better than new when I was done.
	This one was actually a bit of a nightmare. There were a lot of devices made in the 80's and 90's with EL backlit (electroluminescent) LCDs. The EL panels burn out after while and the LCDs become unreadable. In this case the pretty blue LCDs are too thick to fit within the depth of the MX8 subpanel so it means you have to machine or nibble out a huge chunk of the aluminum sub chassis. It sure looks good though.
	RX15 LCD: For some reason Yamaha cheaped out in the early 80's and didn't use back-lit LCDs. They are pretty hard to use on a dark stage but they can all be updated.
	Yamaha TX7 LCD: Once more with feeling. Same LCD, better photograph.


MIDI Bass Pro owners manual PDF	I got the OM from 360 Systems for the MIDI Bass Pro and have OCR'd it and added bookmarks. You're welcome. I'm still looking for a user manual and schematics for the original (non-pro) version. Please help.

Contact information
grant[at]musictechnologiesgroup.com
Orange County, CA USA

Tag Cloud
MTG musictechnolgiesgroup music technologies group