M-3 - Page 210

Confidential

9-22

WARNING:

 If you analyze malfunctions with the power plug inserted into the power outlet, special  

caution should be exercised even if the power switch is OFF because it is a single pole  

switch 

M-3 

Main motor failure 

Possible cause 

Step 

Check 

Result

Remedy 

Failure of 
connector 

1 

Is the connection of 
connector CN9 on the main 
PCB correct? 

No 

Reconnect the connector. 

Main motor 

2 

Is the problem solved by 
replacing the main motor? 

Yes  Replace the main motor. 

Main PCB 

3 

Is the problem solved by 
replacing the main PCB? 

Yes  Replace the main PCB. 

M-4 

No paper supplied 

Possible cause 

Step 

Check 

Result

Remedy 

Separation pad 
/ pickup roller 
failure 

1 

Is the surface of the 
separation pad or the 
pickup roller dirty or worn 
out? 

Yes  1)  Clean the surface of the 

separation pad or pickup 
roller. 

2)  Replace the separation pad 

or pickup roller. 

Failure of 
connector 

2 

Is the contact of the 
solenoid connector on the 
high voltage PCB good? 

No 

Reconnect the connector. 

HVPS circuit 

Yes  Replace the HVPS. 

Paper pickup 
clutch 
solenoid 

3 

Set paper in the manual 
feed slot and make a test 
print. 
Does the voltage between 
pins 2 (SOLENOID) and 1 
(24V) of the CN16 
connector on the main PCB 
change from approx. 24V 
DC to 0V within the 
specified time? 

No 

Replace the paper pickup clutch 
solenoid. 

Main PCB 

4 

Is the problem solved by 
replacing the main PCB? 

Yes  Replace the main PCB.