Detectors - Epson fx-2180 Service Manual

FX-2180 Service Manual

3.2.2 Detectors

Table 3-2. Detector Test Point
Detector
Test Pin No.
CN No.
CN4 1 : HP Place one lead on pin 1 and
(HP 2 : GND the other lead on pin 2, and
Detector) 3 : +5V check the voltage while
blocking two detector
terminal.
CN5 1 : +5V Place one lead on pin 2 and
(Rear PE 2 : PE the other lead on pin 3, and
Detector) 3 : GND check the voltage while
toggling the detector lever.
CN6 1 : PE Place one lead on pin 1 and
(Front PE 2 : GND the other lead on pin 2, and
Detector) check the voltage while
toggling the detector lever.
CN7 1 : E Place one lead on pin 1 and
(TOP 2 : GND the other lead on pin 2, and
Detector) 3 : +5V check the voltage while
4 : A inserting and removing paper
between the detector.
Rev. A
Test Method
(Set Meter to DC Voltage)
• Open : +5V
• Short : 0V
• Open : +5V
• Short : 0V
• Open : +5V
• Short : 0V
• Open : 0V
• Short : +5V
Detector
Meter
Reading CN No.
CN12
(Release
(Home
Detector 1 /
position)
2)
(Out of
home)
(Paper
CN13
loaded)
(PG
Detector 1/
(No paper)
2)
(Paper
CN2 on
loaded)
Panel
board
(No paper)
(Case
Open
(No paper)
Detector)
(Paper
loaded)
Table 3-3. Detector Test Point (continue.)
Test Method
Test Pin No.
(Set Meter to DC Voltage)
1 : Release 1 Place one lead on pin 1 and
2 : GND the other lead on pin 2, and
3 : Release 2 check the voltage while
4 : GND toggling the release lever.
Place one lead on pin 3 and
the other lead on pin 4, and
check the voltage while
toggling the release lever.
1 : PG1 Place one lead on pin 1 and
2 : GND the other lead on pin 2, and
3 : PG2 check the voltage while
4 : GND toggling the PG detector
lever.
1 : COPEN Place one lead on pin 2 and
2 : GND the other lead on pin 3, and
check the voltage while
toggling the detector lever.
Troubleshooting
Meter
Reading
• Open : +5V
• Short : 0V
• Open : +5V
• Short : 0V
• Open : +5V
(Case
opened)
• Short : 0V
(Case
closed)
3-2