Canon MultiPASS C755 Service Manual - Page 118

Faculty tests, check the status of each sensor of this fax in item 1 on the display.

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MultiPASS C755 Chapter 3: Maintenance & Service 7.2.7 Faculty tests The faculty tests are selected by pressing the 6 button from the test mode menu. These tests test the following faculties of this fax. Test type Sensor tests Operation panel test Line signal reception test Overview Test whether the sensors are operating correctly. Tests whether the button switches on the control panel are operating correctly. Tests whether the NCU board signal sensor and frequency counter are operating correctly. a) Sensor tests The sensor test is selected by pressing the 3 button from the faculty test menu. In this test, you can check the status of each sensor of this fax in item 1 on the display. You can also check if sensors that use actuators and microswitches are operating correctly by moving the actuator or microswitch. (See page 3-33 Faulty scanner unit's sensors.) The sensor tests cannot be used to test all of the sensors. The following sensors cannot be tested with the sensor tests: NOTE Home position sensor, pickup roller sensor, cover sensor, and ink detection sensor. If any of these sensor are faulty, an error message or service error code will appear to indicate the faulty sensor. 3-67

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MultiPASS C755
Chapter 3: Maintenance & Service
7.2.7 Faculty tests
The faculty tests are selected by pressing the
6
button from the test mode menu.
These tests test the
following faculties of this fax.
Test type
Overview
Sensor tests
Test whether the sensors are operating correctly.
Operation panel test
Tests whether the button switches on the control panel are
operating correctly.
Line signal reception test
Tests whether the NCU board signal sensor and frequency
counter are operating correctly.
a) Sensor tests
The sensor test is selected by pressing the
3
button from the faculty test menu.
In this test, you can
check the status of each sensor of this fax in item 1 on the display.
You can also check if sensors that use actuators and microswitches are operating correctly by moving
the actuator or microswitch. (See page 3-33 Faulty scanner unit’s sensors.)
The sensor tests cannot be used to test all of the sensors.
The following sensors cannot be
tested with the sensor tests:
Home position sensor, pickup roller sensor, cover sensor, and ink detection
sensor.
If any of these sensor are faulty, an error message or service error code will appear to
indicate the faulty sensor.
NOTE