2. The laser drive signal line connectors are loose.
Action: Reconnect connector J1001 on the laser driver PCB, and connector J202 on the DC
controller PCB.
3. The laser/scanner unit is defective.
Action: Replace the laser/scanner unit.
4. The DC controller PCB is defective.
Action: Replace the DC controller PCB.
VI-6. "12.1 ERROR MOTOR CALL FOR SERVICE" Faulty main motor
"12.2 ERROR MOTOR CALL FOR SERVICE" Faulty main motor
<Possible causes>
1. The main motor drive signal line connectors are loose.
Action: Reconnect connector J12 of the main motor and connector J218 on the DC con-
troller PCB.
2. The door switch on the switch/sensor PCB is defective.
Action: Remove connectors J205 and J221 on the DC controller PCB. If J205-3 (+24V) and
J221-1 (+24VB) on the cable side do not conduct when the door switch (SW1401) is
ON, replace the switch/sensor PCB.
3. The main motor is defective.
Action: Use the printer driver tester to rotate the main motor. If it does not rotate, replace
it.
4. The DC controller PCB is defective.
Action: Replace the DC controller PCB.
VI-7. "13.1 ERROR FAM 1 CALL FOR SERVICE" Electrical unit fan (FM3) failure
<Possible causes>
1. The FM3 drive signal line connector is loose.
Action: Reconnect connector J210 on the DC controller PCB and connectors J12 and J13.
2. The electrical unit fan is defective.
Action: Disconnect connector J210 on the DC controller PCB. Turn the power switch ON
and measure the voltage between connector J210-1 (FAN3D) and J210-3 (GND) on
the DC controller PCB. If the voltage changes from 0 to more than 18V, replace the
electrical unit fan.
3. The DC controller PCB is defective.
Action: Replace the DC controller PCB.
VI-8. "13.2 ERROR FAM 2 CALL FOR SERVICE" Power supply fan (FM2) failure
<Possible causes>
1. The FM2 drive signal line connector is loose.
Action: Reconnect connector J216 on the DC controller PCB.
2. The power supply fan is defective.
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CHAPTER 4