Service manual

09/09 Rev. 5.02-02 SERVICE MANUAL Service Electronics
AP 4.4 – AP 5.4 – AP 7.t
33
Sensor test
General notes
« Activating the sensor test: call parameter SERVICE FUNCTION > Sensor test.
By means of the sensor test, you can check the function of each sensor:
[5] Display after calling „Sensor test“.
Digital sensors Some sensors work digitally, what means that they don´t provide a value
range, but the two values „1“ or „0“.
Analog sensors
If the value shown on the printer display exceeds the range given in the chart
below, the respective sensor is possibly dirty and has to be cleaned (blow the
dirt off with compressed air).
Check the sensor function, e.g. by covering it. If the displayed value doesn´t
change when the sensor is covered, it is possibly not connected or defective.
General rule for all analog sensor values:
Full light leads to values <= 10
No light leads to values >= 220
To sensors which function as a switch applies the following: Values between
10 and 220 mean that the sensor is poorly set, dirty or close to the end of its
life.
Sensors on the CPU board (AP4.4/AP5.4)
Sensor test
0.01 Punch 11
ValueSensor nameSensor #
Sensor
#
Sensor
name
Connector # Typical value Condition
0.01 Punch CN 905 8-20 No material in light
barrier
30-90 Only backing paper in
light barrier
140-255 Label material in light
barrier
0.02 Foil CN 906 4-8 Light barrier open
220-255 Light barrier covered
0.03 Lever CN 907 4-8 Light barrier open
220-255 Light barrier covered
[Tab. 8] Sensor test conditions for sensors, which are connected to the CPU board
(AP 4.4/AP 5.4).