Checking Method For Electric Parts - Epson AcuLaser C1900 Service Manual

EPSON AcuLaser C1900/AcuLaser C900
TRANSPORT COMPONENT OF DUPLEX UNIT / INVERSION AND SIDING
COMPONENT OF DUPLEX UNIT
Detection Timing
Table 3-10. Detection Timing
Category
Inversion and siding Even on the lapse of a predetermined time, the paper does not
component / intercept the light to the duplex unit transport sensor (PC17).
transport
component jam
Retaining paper The light to the duplex unit transport sensor (PC17) is intercepted
detection in when the main switch is turned on, the door and cover are opened
transport and closed or a jam or trouble is cleared.
component
Solution
Electric parts which can cause the jam:
Duplex Unit Transport Sensor (PC17)
•
• Duplex Unit Control Board (PWB-A)
Step Action
1 Initial checking
2 Check the operation of PC17.
3 Replace the PWB-A.
Troubleshooting
Explanation
Table 3-11.
WARNING DIAGRAM
Refer to
Control Signal
p.159 -
p.162 PC17_ON
- -
Check Points and Remedy for Paper Jam

3.4.4 Checking Method for Electric Parts

At occurrence of a paper jam or any other trouble, you can check the relevant electric
parts for their normality by the method as described below:
SENSOR
Table 3-12. Checking Method (Sensor)
Step Check Item
Does the input signal to Control Board
1
change when light to the sensor is
→ →
intercepted? (H L, L H)
SWITCH
Table 3-13. Checking Method (Switch)
Step Check Item
Does the input signal (NO) to Control Board
1
→
turn L H when the switch is turned on?
Revision B
Yes/
Solution
No
NO Replace the sensor
YES Replace the Control Board
Yes/
Solution
No
NO Replace the sensor
YES Replace the Control Board
COM
Not Use
NO
162