Panasonic KX-MB263RU / KX-MB263UA (serv.man7) Service Manual ▷ View online
41
KX-MB263RU-B/KX-MB263UA-B
6.10.7. TONER SENSOR.... “TONER EMPTY”, “TONER LOW”, “CHANGE DRUM”
The Sensor detects whether or not the Drum unit and the toner are present.
When there is not Drum unit, Hall IC (IC50) turns off, and the input signal of IC300-AE22pin (Main Board) becomes a High level
over 9s. When the Drum unit is set, Hall IC (IC50) turns ON/OFF. If the time of IC300-AE22pin's Low level is under 600ms, there
is enough toner in Drum unit, if not, toner is near empty.
When there is not Drum unit, Hall IC (IC50) turns off, and the input signal of IC300-AE22pin (Main Board) becomes a High level
over 9s. When the Drum unit is set, Hall IC (IC50) turns ON/OFF. If the time of IC300-AE22pin's Low level is under 600ms, there
is enough toner in Drum unit, if not, toner is near empty.
Toner Sensor
The rest of toner is detected by the move speed of the magnet put on the pendulum of Mixing Paddle. The pendulum is pushed
up by the Mixing Paddle, then it falls down by its own weight. The rotation speed of paddle is set slower than the one of pendu-
lum which falls down by its own weight. When the toner is still left, the pendulum falls and stops on the toner, then pushed by the
paddle, it starts to rotate. When no toner is left, the pendulum falls to the bottom. Consequently the contact time between the
magnet and Hall IC becomes short when toner is left and long with no toner.
up by the Mixing Paddle, then it falls down by its own weight. The rotation speed of paddle is set slower than the one of pendu-
lum which falls down by its own weight. When the toner is still left, the pendulum falls and stops on the toner, then pushed by the
paddle, it starts to rotate. When no toner is left, the pendulum falls to the bottom. Consequently the contact time between the
magnet and Hall IC becomes short when toner is left and long with no toner.
State
Display
Signal (IC300-AE22pin)
Toner Set (full)
-
level = about 0.3s
Near Empty Toner
TONER LOW
Low level>1s
Mixing Paddle does not rotate
(“CHANGE DRUM”)
(“CHANGE DRUM”)
CHANGE DRUM
High level fix or Low level fix
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KX-MB263RU-B/KX-MB263UA-B
6.10.7.1. TONER DETECTION FLOW
CAUTION:
1. Toner low can be judged by continuous 5-times TONER LOW signal at only printing.
(It is not executed at.)
2. Toner full can be judged by continuous 3-times TONER FULL signal at initialization.
(It is not executed at printing.)
3. In the ordinal operation, “CHECK DRUM” is displayed when TONER EMPTY sensor does not generate a signal for 3.3 sec-
onds.
43
KX-MB263RU-B/KX-MB263UA-B
6.10.7.2. Drum Detection
44
KX-MB263RU-B/KX-MB263UA-B
6.11. OPERATION BOARD SECTION
The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array
(IC1) on Operation board and IC300 on Main board.
The key matrix table is shown below.
(IC1) on Operation board and IC300 on Main board.
The key matrix table is shown below.
1. Key Matrix
a. Hard Scan
*LED7 should be set to KSL4. "8 x 5" key matrix is executed by hardware scanning.
2. LED
• COPY MODE LED ON/OFF port---LED5 (IC1-41pin)
• SCAN MODE LED ON/OFF port---LED2 (IC1-36pin)
• SCAN MODE LED ON/OFF port---LED2 (IC1-36pin)
KIN0
KIN1
KIN2
KIN3
KIN4
KIN5
KIN6
KIN7
KSL0 -
S1
S3
MONITOR
↓
*
#
-
KSL1 -
S2
ZOOM
FLASH
←
7
0
START
KSL2 COPY
COLLATE
REDIAL
SET
4
9
6
KSL3
CONTRAST
N in 1
MENU
↑
2
5
STOP
KSL4
(LED7)
(LED7)
SCAN
RESOLUTION LOWER
CALLER ID
→
1
8
3
CN2
CN511
IC300
ASIC
LCD MODULE
CN1
8x5
KEYS
MATRIX
(Hard)
KEYS
MATRIX
(Hard)
LED
MAIN BOARD
OPERATION BOARD
GATE ARRAY IC
IC1
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