Upgrade your Yamaha DX7 II-D to Yamaha DX7 II-FD

February 2009

By CloudsWalker

www.cloudswalker.com

Missing Parts on the Yamaha DX7 II-D :

IC5

Integrated Circuit 16 pin DIL : TC40H174P

 

 

6 x D-Flip-flop, can be replaced by 74HC174

 

IC6

Integrated Circuit 14 pin DIL : 7405 (TTL)

 

IC22

Integrated Circuit 28 Pin DIL : HM65256BLP12

 

 

SRAM, can be replaced by HM62256LP12 or equivalent

IC23

EPROM 27512 or 27C512 for the new Operating System

IC24

Integrated Circuit 28 Pin DIL : WD1772-PH

(1986)

 

Western Digital Floppy Disk Controller

 

!!!

3,5 inch Floppy Disk with Drive Select 0 !!!

 

CN1

34 pin Floppy Disk Male Connector

 

34 pin flat cable between Main Board and Floppy Disk Power cable between Power Supply Board and Floppy Disk

Parts collecting :

74HC174 is easy to found and found also one IC socket 16 pin DIL 7405 is easy to found and found also one IC socket 14 pin DIL

HM62256LP12 or equivalent is relatively easy to found and found also one IC socket 28 pin EPROM 27C512 is relatively easy to found and found also one IC socket 28 pin DIL WD1772 can by found on the Web … or removed from one Atari ST !!! + IC socket 28 pin The floppy Disk can be 1.44Mb/720kb new … BUT with Drive Select 0

Battery replacement :

It will be judicious at this Time to change your Backup Battery ( 3V CR2032 )

It’s better to solder a socket. This socket can be removed from an old PC Mother Board

Procedure :

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Yamaha manual Upgrade your Yamaha DX7 II-D to Yamaha DX7 II-FD

DX7 II-D specifications

The Yamaha DX7 II-D, introduced in the late 1980s, is a digital synthesizer renowned for its advanced features and enhanced sound capabilities, making it a valuable instrument for musicians and composers. Building upon the legacy of the iconic DX7, the II-D represents a significant evolution in FM synthesis technology.

One of the standout characteristics of the DX7 II-D is its six-operator FM synthesis architecture, which allows for the creation of complex and rich sounds. This architecture offers musicians a wide range of sonic possibilities, enabling them to design everything from lush pads and sharp leads to intricate bell-like sounds. The addition of waveforms and advanced envelope control expands the creative potential even further.

The user interface of the DX7 II-D is more refined compared to its predecessor, featuring an improved LCD display that makes navigating through the various functions and parameters more intuitive. This allows for easier programming and sound manipulation, making it accessible for both beginners and seasoned professionals.

Another significant upgrade in the DX7 II-D is the inclusion of a new set of 32 preset sounds, which display the potential of the synthesizer’s capabilities. These presets are well-crafted and showcase the diverse range of timbres achievable through FM synthesis. Additionally, the synthesizer supports the ability to create and store user-defined sounds, enabling musicians to customize their sound palette to suit their specific needs.

The DX7 II-D also features enhanced performance capabilities, including a 16-note polyphony, allowing for more complex arrangements and thicker soundscapes. With its MIDI compatibility, musicians can easily integrate the DX7 II-D into their existing setups, controlling external devices and software.

Yamaha also introduced a feature known as the “Formant” filter, expanding the timbral possibilities and allowing for more dynamic and expressive sound design. This innovation, combined with a range of connectivity options, solidified the DX7 II-D’s place as a versatile tool for both studio and live performance.

In summary, the Yamaha DX7 II-D is a powerful and sophisticated synthesizer that builds upon the foundation laid by its predecessor. Its advanced FM synthesis capabilities, improved user interface, rich preset library, and enhanced performance features make it a timeless instrument, still sought after by musicians around the world. Whether for creating vintage sounds or modern textures, the DX7 II-D continues to inspire and shape the landscape of electronic music.