Epson GT-1200, Руководство по обслуживанию

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ADF Troubleshooting
Rev. A 3-1
3.1 OVERVIEW
This chapter describes the troubleshooting required when this ADF
functions abnormally. Generally, defective part can be found easily by
running various test modes as long as the ADF is in operation. The test
modes are described in the following sections.
3.1.1 Test Mode Overview
This ADF is equipped with 6 test modes. After activating each mode, you
can roughly isolate the defective part according to the blinking pattern of
the LED. Use of functions of these modes also brings you an early
detection of the defective part at the on-sight service. However, you can
refer to the resistance values for the motors and solenoids shown in
Appendix as the error indication with LED is not distinguishable enough.
R e m o v e t h e s l i d e c o v e r , t h e n r e m o v e t h e
s w i t c h c o v e r s e c u r e d b y t h e s c r e w .
D I P - S W
P u s h
S w i t c h
L E D ( r e d )
Figure 3-1. SW Cover Removal
Table 3-1. Test Modes and Test Methods
No. No. No. No.
Test Mode Test Method
1 Single feeding mode
Feed the paper in the single feeding
mode and check the operation.
2 Reverse feeding mode
Feed the paper in the reverse feeding
mode and check the operation.
3
Single feeding without
paper aging mode
Without any document set, the ADF
performs single paper feeding motion
at a high speed.
4
Reverse feeding without
paper aging mode
Without any document set, the ADF
performs reverse paper feeding
motion at a high speed.
5
Motor line output check
mode Drive 3 motors in the ADF and check
for the proper operations.
6
Solenoid line output
check mode Activate 2 solenoids in the ADF and
check for the proper operations.
CHECK POINT
ü ü ü ü n
n n
n
If a sensor error occurs during a test mode, see
Chapter 5 and perform any necessary
adjustment.
n n n n
If an error occurs during a test mode, refer to
Table 3-2 and take proper actions.
Table 3-2. Error Indication during the Test Modes
No
....
LED Indication Corresponding ADF Condition
1 Blinks (Interval: 1000 msec) Test is done without any error.
2 Blinks (Interval: 500 msec)
Sensor error or motor error has
occurred.
3 Blinks (Interval: 50 msec) Paper is jamming.