11.2 OPERATION PANEL
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.
CN106
-B15
-B16
-A16
-B7
-B6
-B5
-B4
-B3
-B2
-B1
-A1
CN202 -1
-2
-3
-4
-5
-6
-7
-9
-8
-10
-11
CN106
CN201
-A11
Scan1
-1
-A13
Scan2
-2
-B11
Scan3
-3
-B13
Scan4
-4
-A12
Scan5
-5
Key
Matrix
LED Matrix
MAIN BOARD
OPERATION PANEL
Key 1
Key 2
Key 3
Seg a
Seg b
Seg c
Seg d
Seg e
Seg f
Seg g
Seg h
seg b 2
seg c 2
seg d 2
seg e 2
seg f 2
seg g 2
seg h 2
seg a 2
-1
-2
-3
-4
-5
-6
-7
-8
-A2
-A3
-A4
-A5
-A7
-A8
-B8
-A15
-6
Scan6
OTHERS
31 December 1992
2-48
Summary of Contents for FW830
Page 3: ...SECTION 1 OVERALL MACHINE INFORMATION...
Page 19: ...SECTION 2 DETAILED SECTION DESCRIPTIONS...
Page 68: ...SECTION 3 INSTALLATION...
Page 86: ...SECTION 4 SERVICE TABLES...
Page 140: ...SECTION 5 REPLACEMENT AND ADJUSTMENT...
Page 209: ...SECTION 6 TROUBLESHOOTING...
Page 223: ...74 72 73 76 75 79 85 84 83 82 80 81 86 87 88 77 78...
Page 224: ...90 89...