Switch Scan Test - Oki C7400 Maintenance Manual

3.1.2.3 Switch scan test

This self-diagnosis is used when the input sensor and the switch are checked.
1. Enter the general diagnosis mode, and press and hold the 1 1 1 1 1 and 5 5 5 5 5 keys down until "SWITCH
SCAN" appears on the upper display (the 1 1 1 1 1 key increments a test item and the 5 5 5 5 5 key
decrements a test item).
SWITCH SCAN
2. Table 3-1 lists SCAN numbers. Hold the 2 2 2 2 2 and 6 6 6 6 6 keys down until the SCAN number for a unit
to be tested shows up on the upper display (the 2 2 2 2 2 key increments a test item and the 6 6 6 6 6 key
decrements a test item).
3. In response to the press of the 3 3 3 3 3 key, the test starts, the SWITCH SCAN number begins
blinking, then the corresponding unit number (any of 1 to 4) and the current status are displayed.
SWITCH SCAN 00
1=H 2=L 3=H 4=L
Operate the units (Figure 3-1). Their respective liquid crystal displays are provided (Displays
vary by sensor. See Table 3-1 for details).
4. When the 7 7 7 7 7 key is touched, the SWITCH SCAN number goes back to an indication view (stops
blinking).
5. Repeat steps 2 through 4 as required.
6. To end the test, press the 4 4 4 4 4 key (the display is restored to the view of step 1).
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