Power Supply Service Check - Lexmark C910 Service Manual

5055-01X

Power Supply Service Check

FRU
1 Voltage
2 Power Cord
3 • Fuse
• Switch
• Power Supply 1
4 Power Supply 2
2-86
Service Manual
Be sure the switch is on and the power cord is
firmly plugged into the printer. Be sure the correct
voltage is present at the outlet.
Check the power cord for continuity.
The power supply fuses may be blown. Unplug the
machine and check fuse F2 on the power supply 1
for continuity. If the fuse is good, check the power
switch connector for continuity.
The power supply 2 may be defective.
Check the dc power of the power supply for the
following pins:
CN102 pins 8 and 11 for +3.3 V
CN103 pins 7 and 14 for +3.3 V
CN105 pin 5 for +3.3 V
CN102 pins 12 and 14 for +5 V
CN103 pins 1, 3, 8, 9 for +5 V
CN104 pins 1 and 2 for +5 V
CN104 pins 7 and 8 for +24 V
CN105 pin 4 for +24 V
CN106 pins 5 and 6 for +24 V
Replace power supply 2 if necessary.
Action