Panasonic FA-DS72 / FA-DS82 / FA-MA301 Service Manual ▷ View online
3-1
Maintenance
Replacement
interval
120K
120K
120K
1200K
Block Section
Part name
Pick-up roller
Paper feed roller
DFP roller
Torque limiter
3. Maintenance
3.1 Maintenance components
The following is the replacement parts of LCC maintenance.
1
2
3
4
SV010
1
LCC
2
3
4
3-2
3
2
1
4
3.2 Disassembly / Assembly
1) Replacement of the pick-up roller / paper feed roller
1
• Remove the upper cover.
1
Remove the touch ring.
2
Remove the bracket guide.
3
Remove and replace the pick-up roller.
4
Remove and replace the paper feed roller.
SV011
2
• Remove the front guide from the paper
feed side. ( 2 screws )
1
Remove the touch ring lowering the DFP
roller downward.
2
Remove the DFP roller.
3
Remove the torque limiter.
4
Check the direction of the torque limiter
SV012
2) Replacement of the paper drawer double feed prevention roller/torque limiter
3
2
1
Paper feed roller
Pick up roller
4-1
Electrical
4. Electrical
4.1 Electrical Components Operation
The circuit construction of the electrical components in LCC three thousand sheet
cassette is shown in the figure below.
•
When the LCC door is opened, the door open/close detecting sensor detects
open/close and the signal from it is inputted into IC563. Then, the up/down signal
of the paper feed tray is transmitted from IC562 to transistor DT563 and IC564,
which sends an electric current to the up/down motor and rotates it downward.
The combination of transistor DT563 and DT564 signals controls the up and
down motion of the tray. It is transmitted to IC565 and starts the up/down motor.
•
When the paper tray reaches the lower limit sensor, the sensor is actuated, and
the signal from it (LCLDSN is high) is inputted into IC563 to stop the downward
movement of the tray.
•
When the door is closed after paper is installed on the paper tray, the signal from
the door open/close detecting sensor is inputted into IC563 and the tray goes
up.
•
When the upper surface of paper reaches the upper limit, the sensor lever
attached to the paper limit sensor is lifted up. At this time, the paper upper limit
sensor signal (LCLBSN) becomes high. This signal is inputted into IC563 to stop
the elevator motor.
•
When copying starts, the paper feed motor starts rotation and the paper feed
solenoid is turned on. Then the paper transfer roller is pushed against paper on
the paper tray, and the paper is sent to copier by the paper transfer roller and the
paper feed roller.
•
When the amount of paper on the tray decreases, the upper limit sensor is turned
off. (Intercepted: 5V) In this condition, the elevator motor goes up and the
upper limit sensor is turned on (Unintercepted: 0V), the motor stops and the
upper surface position of paper in the tray is maintained.
•
When there is no paper in the tray, the sensor lever falls into the slit hole on the
bottom plate. Then paper detecting sensor is turned off (Intercepted: 5V) and
detects no paper.
•
The photosensors such as paper detecting sensor show high (5V) when the
sensor levers intercept the sensors and low (0V) when they do not. The voltage
is read by IC563 as the input signals.
4-2
CN564
1
2
3
4
2
3
4
5
6
7
6
7
8
9
10
11
11
V
P
LCSOL
V
V
L
LCLBSN
GND
V
V
L
LCPESN
CN566
1
2
3
4
2
3
4
5
6
7
6
7
GND
LCDOSN
V
LCDOSN
V
L
–
GND
LCLDSN
LCLDSN
CN565
1
2
3
4
2
3
4
5
6
6
LCMBB
COMB
LCMB
LCMAB
COMB
LCMB
LCMAB
COMA
LCMA
LCMA
V
L
GND
V
V
L
LCDSN
GND
GND
CN563
1
2
2
LCLUM1
LCLUM2
LCLUM2
24V
0V
0V
24V
0V
0V
LCLUM1
LCLUM2
IN1
IN2
ST
+5V
R585
Q561
R586
DT565
IC564
+24V
IC565
1
2
2
R582
+5V
R583
DT563
DT564
1
2
24
IC562
11
12
14
3
13
IC563
4
8
8
24V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
LCC DRIVER CIRCUIT
DOWN UP
DOWN UP
ELEVATOR MOTOR
F4 MODE OUTPUT CHECK
F4-65: PAPER FEED SOLENOID ON
F4-66: TRAY GOING UP
F4-67: TRAY GOING DOWN
CONNECTOR
(TO SYSTEM
CONSOLE
PAPER FEED)
(TO SYSTEM
CONSOLE
PAPER FEED)
CONNECTING
CABLE
(TO COPIER)
CABLE
(TO COPIER)
PAPER FEED
SOLENOID ON
PAPER UPPER
LIMIT
(INTERCEPTED)
LIMIT
(INTERCEPTED)
NO PAPER
(INTERCEPTED)
(INTERCEPTED)
DOOR
CLOSED
(INTERCEPTED)
CLOSED
(INTERCEPTED)
TRAY LOWER
LIMIT
(INTERCEPTED)
LIMIT
(INTERCEPTED)
LCC INSTALLED
(INTERCEPTED)
(INTERCEPTED)
PAPER FEED
MOTOR
MOTOR
PAPER FEED SOLONOID
UPPER LIMIT SENSOR
PAPER DETECTING SENSOR
LCC INSTALLATION SENSOR
DOOR OPEN/CLOSE DETECTING SENSOR
LOWER LIMIT SENSOR
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