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Canon MultiPASS C5000 Service Manual Page 158

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c) Line signal reception test
The line detect test menu is selected by pressing the 9 button from the faculty test menu.
This test checks the operation of the NCU signal sensor and frequency counter. In Menu
1, the CI, status can be detected and in Menu 2 the frequency can be detected at changing
detection levels. In this way, you can check if the NCU board is correctly detecting
signals.
c-l) Test Menu 1
Test Menu 1 is selected by pressing the 1 button from the Line Detect menu. When CI,
is detected from the modular jack, the display changes from OFF to ON and the received
frequency is displayed.
c-2)
Test Menu 2
Test Menu 2 is selected by pressing the 2 button from the Line Detect menu. When a
tonal frequency is detected from the modular jack, the display changes from OFF to ON
and the received frequency is displayed. The frequency detection level can be set with
the numeric buttons.
Numeric button
0
1
2
3
4
5
6
8
9
c-3) Test Menu 3
Test Menu 3 is selected by pressing the 3 button from the Line Detect menu. When
CNG is detected from the modular jack, the display changes from OFF to ON.
c-4)
Test Menu 4
This item is not used. Do not select it
Detection level (de!) _
-26
-30
-32
-35
-38
-41
-47
-51
3-56

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