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Music Technologies Group
Yamaha DX7 SuperMAX+
Installation Guide
Installation Guide Version 2.20
November 2018
1: Introduction
The SuperMAX+ is a very powerful do-it-yourself option that provides increased memory and
greater control of the DX7.
While the installation is fairly simple, it still requires patience and general electronics
knowledge. We accept no responsibility for the work you perform on your DX7. Read over
the following installation description and if you feel you are not capable of the work
required, turn the project over to a qualified technician.
All Lithium battery repairs must be done by a qualified technician due to the explosive
nature of the CR2032 battery.
Precautions!
High Voltage Safety Warning
Turn the DX7 power switch OFF and disconnect the AC power cable before opening the DX7.
ESD Precautions and Proper Handling Procedures
You should observe standard static-safe handling behavior when working with sensitive electronic
equipment such as synthesizers:
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Summary of Contents for Yamaha SuperMAX+
- Page 1 Music Technologies Group Yamaha DX7 SuperMAX+ Installation Guide Installation Guide Version 2.20 November 2018 1: Introduction The SuperMAX+ is a very powerful do-it-yourself option that provides increased memory and greater control of the DX7. While the installation is fairly simple, it still requires patience and general electronics knowledge.
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Page 2: Installation
Avoid carpets in cool, dry areas. Dissipate static electricity before handling any system components by touching a grounded metal object. If possible, use anti-static devices, such as wrist straps and floor mats. Take care when installing the board. A damaged pin can render the board unusable. Prevent damage to the connectors by aligning connector pins before you apply pressure. - Page 3 (Re)Move the Keybed & Remove the Keyboard Rail It can be difficult to see the delicate pins when installing the SuperMAX+ board. By moving the keybed (the chassis with the keys) and removing the silver keyboard rail, you will have better sight lines and freedom of movement when installing the SuperMAX+ board.
- Page 4 You now have excellent access to the DX7 main board. If you do remove the keybed you may find it easier to remove the small yellow cable and large flat grayish cable at the main-board-end rather than from the keybed. You will also need to unclip two small cables on the left end. There may also be wire tires and/or cable fasteners to deal with.
- Page 5 The EPROM is found in location IC14 and the two M5M5118P SRAM chips are located at IC21 and IC20. Remove them by prying slowly at each end of the chip back-and-forth with a small flat-head screwdriver. Avoid touching any of the metal pins with the screwdriver. Also be careful of the capacitors nearby (these are the flat green discs in the photos).
- Page 6 Place the SuperMAX+ board gently on the DX7 main board so that the 28 pins that form a DIP package align with the vacated IC14 spot. The 8 pins along the edge should align with IC20. Do not press the board in place yet. You can use a small mirror to check the pin alignment. Once you are happy that all the pins are aligning with the desired locations, firmly and evenly press the SuperMAX+ board in place.
- Page 7 MIDI units or dB or anything else. It was chosen so that a typical player can achieve a MIDI Out note-on velocity of 127 using reasonable force. Consult the online "Yamaha DX7 SuperMAX+ User Guide" for more information on using your upgraded DX7.