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Yamaha DX7 S 

Installation Guide

 

 

 

Installation Guide Version 2.20 

November 2018 

 

 

1: Introduction 

 
The  S  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: 

Summary of Contents for SuperMAX+

Page 1: ...rform 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 ...

Page 2: ...all o Standard Philips screwdriver Condition of DX7 While the SuperMAX will replace the functionality of damaged or missing EPROM and or SRAM chips it will not correct other problems your vintage synthesizer may have It is recommended that the synth be in otherwise good condition before beginning the installation For instance the battery voltage should be checked and the battery replaced repaired ...

Page 3: ...mpty case bottom The photo illustrates the location of the 4 screws You will of course be unscrewing from the underside Loosen the 3 internal screws at the extreme right and left ends that hold the keybed in place It is not necessary to extract them from the holes they reside in Carefully lift the keybed slightly up and out toward yourself an inch or so You don t need to move it much You will prob...

Page 4: ... 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 Remove the EPROM and SRAM ICs The next step is to remove the EPROM and two SRAM ICs Follow the instructions on the next page Memory chips in place Memory chips removed ...

Page 5: ...nd tighten the supplied nylon standoff into the screw position near IC23 Tighten it well by hand but there is generally no need to use a tool Do not over tighten or strip the threads Next CAREFULLY remove the SuperMAX board from its anti static packaging Inspect the bottom of the board to make sure none of the pins have been damaged or have any debris on them Identify your SuperMAX board version R...

Page 6: ...l main board screw through the SuperMAX board into the nylon standoff Do NOT force it or over tighten as this can not only strip the standoff but it can cause the SuperMAX board to torque and change position It should be tight enough so that it cannot work lose Double check the pins Reassembly Carefully reassemble the DX7 in the reverse order taking care to replace the correct screws in the variou...

Page 7: ...al 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 Problems Almost all installation problems are due to poor board seating or connections Remove the board check all the pins for debris contamination bending etc Then reinstall Battery Holder Option The information here is d...

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