5.2.2 Sensors
Table 5-2 Sensor TestPoints
SensorConnect or
Number
Test Pin
Number Test Method
(Set Meter to DCVoltage. )
Meter Reading
CN4
(HP Sensor) 1:HP
Place one lead onpin 1 and the other
lead on pin2, and check the voltagewhile
blocking the two sensor terminals.
Open:
+5 V
(Home position)
Short: 0 V
(Not home)
^2: GND ^
^3: +5 V ^
CN5
(Rear PESensor) 1: +5 V
Place one lead onpin 2 and the other
lead on pin3, and check the voltagewhile
toggling the sensorlever.
Open: +5 V
(Paper loaded)
Short: 0 V
(No paper)
^2: PE ^
^3: GND ^
CN6
(Front PESensor) 1: PE
Place one lead onpin 1 and the other
lead on pin2, and check the voltagewhile
toggling the sensorlever.
Open : +5 V
(Paper loaded)
Short: 0 V
(No paper)
^2: GND ^
CN13
(PG Sensors
1 and2) 1: PG1 Place one lead onpin 1 and the other
lead on pin2, and check the voltagewhile
toggling the sensorlever.
Place one lead onpin 3 and the other
lead on pin4, and check the voltagewhile
toggling the sensorlever.
Open: +5 V
Short: 0 V
^2: GND ^
^3: PG 2 ^
^4: GND ^
CN12
(Release Sensors1
and 2) 1: Release 1 Place one lead onpin 1 and the other
lead on pin2, and check the voltagewhile
toggling the sensorlever.
Place one lead onpin 3 and the other
lead on pin4, and check the voltagewhile
toggling the sensorlever.
Open: +5 V
Short: 0 V
^2: GND ^
^3: Release 2 ^
^4: GND ^
CN7
(PW Sensor) 1: E
Place one lead onpin 1 and the other
lead on pin2, and check the voltagewhile
inserting and removing paper between
the platen andsensor.
0 < Open Voltage
(No paper)
< Short Voltage
(Paper loaded)
^2: GND ^
^3: +5 V ^
^4: A ^
CN2
(Case Open Sensor) 1: COPEN
Place one lead onpin 1 and the other
lead on pin2, and check the voltagewhile
toggling the sensorlever.
Open: +5 V
(Case open)
Short: 0 V
(Case closed)
^2: GND ^
Troubleshooting FX-2170 Service Manual
5-2 Rev. A