Paper Misfeed(Document Feeder Section - NEC NEFAX 671 Service Manual

3.

PAPER MISFEED(Document Feeder Section)

Misfeed Detection Timing and Troubleshooting Procedures
(1) The Original misfeeds
<Detection Timing>
Type
• The Paper Take-Up Sensor is not unblocked after the predeter-
• The Paper Take-Up Sensor is not blocked after the predeter-
ADF Jam
• The Exit Sensor is not unblocked after the predetermined
• The Exit Sensor is not blocked after the predetermined period
If all of the following conditions are met
• The Automatic Document Feeder is in standby.
ADF remains paper
• The Document Feeder Cover is closed.
jam
• The Original Detection Sensor is blocked.
• Either the Paper Take-Up Sensor or the Leading Edge Detec-
<Troubleshooting Procedures>
Original Detection Sensor (PC1)
Paper Take-Up Sensor (PC2)
Leading Edge Detection Sensor (PC3)
Step Action
1 Initial checks
2 PC1 sensor check
3 PC2 sensor check
4 PC3 sensor check
5 Replace PWB-A ADF.
Description
mined period of time has elapsed after document feeding
began.
mined period of time has elapsed after the Paper Take-Up Sen-
sor is unblocked.
period of time has elapsed after the Paper Take-Up Sensor is
unblocked.
of time has elapsed after the Paper Take-Up Sensor is blocked.
tion Sensor or both sensors are blocked.
Relevant Electrical Parts
Automatic Document Feeder Control Board
(PWB-A ADF)
Ref. Page
☞ T-6
☞ T-45
PWB-A ADF PA02A ADF-1
☞ T-45
PWB-A ADF PA06A ADF-1
☞ T-45 PWB-A ADF PA03A ADF-1
–
T-13
WIRING DIAGRAM
Location
Control Signal (Electrical
Component)
–
C~D-4~5
D~E-4~5
I-6~7
–
–
–