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OTHERS
11.2 OPERATION PANEL
MAIN BOARD
CN106
CN201
-A11
-1
Scan1
-A13
-2
Scan2
-B11
-3
Scan3
-B13
-4
Scan4
-A12
-5
Scan5
-6
Scan6
CN106
-B15
Key 1
-B16
Key 2
-A16
Key 3
-B7
Seg a
-B6
Seg b
-B5
Seg c
-B4
Seg d
-B3
Seg e
-B2
Seg f
-B1
Seg g
-A1
Seg h
-A2
seg a 2
-A3
seg b 2
-A4
seg c 2
-A5
seg d 2
-A7
seg e 2
-A8
seg f 2
-B8
seg g 2
-A15
seg h 2
The above illustration shows the copier's operation panel circuit in block form.
The operation panel circuit is driven by six scan pulse lines. The copier uses
LEDs for display elements. To light any particular LED, the CPU drops the
appropriate segment line to 0 volt at the same time that the scan line
connected to the LED is being energized.
The CPU monitors the KEY lines (KEY1 to KEY3) to determine if a key has
been pressed. Each KEY line is used to monitor up to five keys on the
operation panel. A specific scan pulse appears at the appropriate KEY line
when a key on the operation panel is pressed.
OPERATION PANEL
Key
Matrix
CN202 -1
-4
-2
-3
LED Matrix
-9
-5
-6
-7
-8
-10
2-48
31 December 1992
-11
-1
-2
-3
-4
-5
-6
-7
-8
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