Matrix MX-A5 Series, Руководство по обслуживанию

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2. Open the side covers then check if all the wire harnesses are
connected properly to the terminals of the control board and
confirm the control board +12 LED whether is light.
3. Unplug the generator cable from the control board and pedal the
machine to check if the voltage is variable.
If it is, replace the control board with a new one.
If it is not, replace the generator with a new one.
No display on the console or the display is dim
Possible causes:
1. Console is damaged or the console cable is not connected properly.
2. Poor connection to all the terminals on the control board.
3. Control board is damaged.
4. Generator is damaged.
Fix:
1. First, unplug the console cable and use a multi-meter to check if
the voltage between the 1(Vcc) and 7(Ground) pin of the console
cable is greater than 12 VDC.
(If it is, replace the console and check again.