Livestrong LS15.0E, Service Manual

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CHAPTER 4: TROUBLESHOOTING
4.1 Troubleshooting – No Power to the Console
Symptom
：
The power switch is in the on position, but the console will not turn on.
Reason
：
1. The outlet is not providing the correct power, or the power cord / switch is defective.
2. The power receptacle or power wiring to the MCB is defective.
3. The MCB is defective.
4. The console cable or console is defective.
Solution
：
1. First check to see if the power switch is lit. If it is not, try a different outlet. If the power switch still does not
light up with a known good outlet, replace the power switch.
2. Check to see if the MCB has power. There is a red power LED on the MCB that should be lit.
3. If the MCB does not have power, check the connection of the power wiring from the power receptacle to the
MCB. Use a multi-meter to measure AC1 and AC2, AC voltage shall be same as local’s standard voltage
(110V-240V)
a. If AC voltage value is standard, replace the MCB as it is defective.
4. Make sure that the input to the console's power supply is a 12VDC, use a multi-meter to measure the voltage
of the four pins in the figure below, pins 1 and 2 should be 12VDC and pins 7 and 8 should be ground.