This test should be used if the system hangs on a display message in the Fluorescent Indicator Panel [FIP] and the system does not continue on. It checks the system for a working Assigner CPU Board or Display Board. Operation during a normal power up procedure [not pressing WRITE button] will display three messages in the following order:

MESSAGE #1:   * * * * * * ROLAND MKS-70 * * * * * *   output to the FIP then pauses for 7 seconds
MESSAGE #2:               ROLAND MKS-70               output to the FIP then pauses for 7.5 seconds
MESSAGE #3:   I-A1 {Patch Name} {ToneA} {ToneB}       output to the FIP then remains until a button is pressed

 For normal power up [not pressing WRITE button while powering up], these boards are suspect if the synth hangs on one of the FIP messages:
___ No Messages: Assigner Board and/or Display Board
___ Message 1, 2, and 3: Assigner Board and/or Display Board
___ Message 1 Only: Module Board A and/or Module Board B
___ Message 2 Only: Potentiometer reading [A/D converter]

This test displays the current voice assignments as they relate to the sound blocks [i.e. Module Boards]. Feeding a MIDI note to the synth will replace a patch name character in the FIP. On a MIDI NOTE OFF, the name disappears leaving the character position blank until the same module is assigned again. This test is useful for determining non-working Module Boards. The sample FIP display shown below shows Sound Block assignments as they appear in the corresponding FIP character locations when a MIDI NOTE ON is sent to the synth:

1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 

               A  B  C  D  E  F  A  B  C  D  E  F

               ^--------------^  ^--------------^
                 SOUND BLOCK A     SOUND BLOCK B

Rotary Assign Mode. Modules are assigned to a key pressed one at a time from A to F in a cyclic manner. If more than one key is pressed at a time, the subsequent assignments are disordered. Power-off the synth and enter test mode again

TEST MODE #4
MKS-70: Press & hold the "PARAM" & "VALUE" buttons while powering up
JX-10: Press & hold the "B" & "C" buttons while powering up

NOTICE: The following test and adjustments will alter JX-10 & MKS-70 settings permanently! Make sure you know what you are doing!

This places the system into a combination of test modes #2 and #3. Press the ENTER and SHIFT keys simultaneously and the associated LED's will light up red. The number keys 1 through 8 will act as if you are pressing a key on a keyboard and sends MIDI NOTE ON.

1) Without using the external Programmer [PG-800], edit tone parameters as shown in Table 1
2) Connect an oscilloscope to OUTPUT A - L (MONO) and an open-circuit plug to OUTPUT B - R (MONO)

3a) MKS-70 Only: Press the LEFT ARROW button twice. This lowers the button keys 1 through 8 by 2 octaves in pitch. Press button 6 and verify that it produces A4 generating 442MHz [A above Middle C]. While pressing button 6, determine the assigned modules on the display [See Table #2]: Adjust trimpot on that module on Module Board A. for a maximum swing on the ocsilloscope

3b) JX-10 Only: Press the note on the keyboard coresponding to A4 that generates 442MHz [Key above middle C]. Identify the modules being assigned by watching the FIP display [See Table #2]. Adjust the trimmer pot on Module Board A for maximum swing on the oscilloscope

4) In the same manner, adjust the remaining modules on Module Board A
5) Move the oscilloscope to OUTPUT B - R (MONO) and an open-circuit plug to OUTPUT A - L (MONO)
6) Repeat steps 3 and 4 for the modules on Module Board B