Machine Initialization Failure

This section assumes that you have the power switch turned on and that the power supply is functioning. (Check for a green LED that should be illuminated on the side of the power supply unit.)

Symptoms of a machine initialization failure include global failure of all of the servo and stepper motors to initialize (power up). In addition to these, some LEDs might illuminate on the Main PCB, but most will probably stay dark.

Step	Symptom	Condition	Solution/Step
1	Examine the status of the 5V indicator LED located at position D43 on the Main PCB (labeled "5V Regulator").	LED D43 off or dim	Main Controller PCB has failed, replace it.
1		LED On	Go to Step 2
2	Check for any loose harness connections	Loose connections	Connect the harnesses
2	Check for any loose harness connections	No problems	Contact Melco Technical Support
3	Design will not load or machine locks up on initialization.	User Interface Harness connectors bad	Replace Harness
3	Design will not load or machine locks up on initialization.	Main PCB bad	Replace Main PCB

If the 5V indicator LED (D43) is off, it indicates a catastrophic failure of the 5V circuitry on the Main PCB. This fault should not occur very often, if at all. Because of the expense involved in replacing the Main PCB, contact Melco Technical Support so the issue can be confirmed.