1.
INTRODUCTION
• This chapter contains the items required or used when troubleshooting various printer
problems.
1-1.
Electric Components Check Procedures
• The following procedures can be used to check to see if an electric component is fully
operational when a paper misfeed or a malfunction occurs in the printer.
(1)
Sensors
Step
Does the input signal to the Controller/Mechanical
1
Control Board go from HIGH to LOW, or vice versa,
when the sensor is blocked?
Check
4025T520AA
4025T521AA
T-1
Result
Action
NO
Replace the sensor.
Replace the Con-
YES
troller/Mechanical
Control Board.