Canon LBP 2460 Service Manual - Page 257

M-9 Electrical Unit Fan FM3 Failure, Action, M-10 Fixing Unit Fan FM4 Failure, M-11 Lifting Plate

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CHAPTER 4 M-9 Electrical Unit Fan (FM3) Failure 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. M-10 Fixing Unit Fan (FM4) Failure 1. The FM4 drive signal line connector is loose. Action: Reconnect connector J225 on the DC controller PCB and connectors J25 and J26. 2. The fixing unit fan is defective. Action: Disconnect connector J225 on the DC controller PCB. Turn the power switch ON and measure the voltage between connector J225-1 (FAN4D) and J225-3 (GND) on the DC controller PCB. If the voltage changes from 0 to more than 18V, replace the fixing unit fan. 3. The DC controller PCB is defective. Action: Replace the DC controller PCB. M-11 Lifting Plate Failure 1. Lifting plate drive unit parts are damaged. Action: Replace any damage parts. 2. The lifting plate position sensor is defective. Action: Check the sensor state using the printer driver tester. If it is defective, replace the multi-purpose tray PCB. 3. The lifting plate solenoid is defective. Action: Disconnect lifting plate solenoid connector J1302. Measure the resistance between connectors J1302-1 and J1302-2 on the cable side. If it is not about 100Ω, replace the lifting plate solenoid. 4. The DC controller PCB is defective. Action: Replace the DC controller PCB. 4 - 43

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M-9 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.
M-10 Fixing Unit Fan (FM4) Failure
<Possible causes>
1.
The FM4 drive signal line connector is loose.
Action:
Reconnect connector J225 on the DC controller PCB and connectors J25 and J26.
2.
The fixing unit fan is defective.
Action:
Disconnect connector J225 on the DC controller PCB.
Turn the power switch ON
and measure the voltage between connector J225-1 (FAN4D) and J225-3 (GND) on
the DC controller PCB.
If the voltage changes from 0 to more than 18V, replace the
fixing unit fan.
3.
The DC controller PCB is defective.
Action:
Replace the DC controller PCB.
M-11 Lifting Plate Failure
<Possible causes>
1.
Lifting plate drive unit parts are damaged.
Action:
Replace any damage parts.
2.
The lifting plate position sensor is defective.
Action:
Check the sensor state using the printer driver tester.
If it is defective, replace the
multi-purpose tray PCB.
3.
The lifting plate solenoid is defective.
Action:
Disconnect lifting plate solenoid connector J1302.
Measure the resistance between
connectors J1302-1 and J1302-2 on the cable side.
If it is not about 100
Ω
, replace
the lifting plate solenoid.
4.
The DC controller PCB is defective.
Action:
Replace the DC controller PCB.
CHAPTER 4
4 - 43