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8.12 TROUBLESHOOTING - NO POWER TO THE CONSOLE
1) SYMPTOM:
a. The unit is not getting power from the outlet.
b. The MCB is not getting power from the power receptacle.
c & d. The power switch and MCB LEDs are lit, but there is no power to the console.
2) SOLUTION:
a. Check to see if the power switch is lit. If it is not, plug the power cord into a known working outlet and re-test.
- If the power switch is still not lit, replace the power switch, receptacle, and / or the power cord.
b. Remove the motor cover and check to see if LED +12V (DSP4) is lit on the MCB (Figure A).
- If the LED +12V is not lit, check the incoming AC voltage to the MCB.
- Replace the MCB if all power components are OK, and there is AC volts to the MCB.
c. If LED +12V is lit, check the switch on the back of the LMM Board (Figure B).
- If the unit has a power board (Figure C), the switch should be towards the left.
- If the unit does not have a power board, the switch should be towards the right .
d. If LED +12V is lit, check the connection of the console communication cable.
- If the console communication cable is connected correctly, D18 on the console UCB should be lit.
- If D18 on the console UCB is not lit, replace the console communication cable.
- If D18 on the console UCB is lit, but there is still no power to the console, replace the console.
POWER SWITCH IS ON, BUT THE CONSOLE HAS NO DISPLAY
FIGURE BFIGURE A
CHAPTER 8: TROUBLESHOOTING
FIGURE C
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