Fast delivery and good quality manual.
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Text excerpt from page 31 (click to view)
Chapter 3 Troubleshooting
Remove the Network Board, and measure the resistance at C2 on the Main Board. *1
Replace the Network Board.
Remove the DC Fan, and measure the resistance at C2 on the Main Board. *1
Remove the Power Cord from the secondary side, and measure the resistance at C2 on the Main Board. *1
Replace the DC Fan.
Check coating of the Power Cord at the secondary side. Good?
Replace the Main Board. *3
Replace the Power Cord at the secondary side.
Replace the Power Supply board assy.
To Start of Troubleshooting.
*1: The correct resistance at C2 is 40 to 50-ohm. *2: Measure the resistance between VCC (12 pin) and GND (5 pin). The correct resistance is 1M-ohm or more. *3: Be sure to use the EEPROM from the original Main Board on the replaced new Main Board. (See page 1-5 for details.)