Service manual

38
8.13 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 IO Board (Figure B).
- If the unit has a power board (Figure C), the switch should be towards the left (EX_Power).
- If the unit does not have a power board, the switch should be towards the right (LCB_Power).
d. If LED +12V is lit, check the connection of the console communication cable.
- If the console communication cable is connected correctly, LED 2 on the console UCB should be lit.
- If LED 2 on the console UCB is not lit, replace the console communication cable.
- If LED 2 on the console UCB is lit, but there is still no power to the console, replace the console.
FIGURE C
POWER SWITCH IS ON, BUT THE CONSOLE HAS NO DISPLAY
FIGURE B
FIGURE A
CHAPTER 8: TROUBLESHOOTING