Panasonic FA-DS72 / FA-DS82 / FA-MA301 Service Manual ▷ View online
3-1
Maintenance
3. Maintenance
3.1 Maintenance components
The following is the maintenance replacement areas of the paper feed system.
Section
1
2
3
4
5
Part name
Paper feed roller
Pick-up roller
DFP roller
Torque limiter
Middle roller
Paper feed system
Replacement
interval
interval
120K
120K
120K
1200K
1080K
SV210
SV210
2
1
3
5
4
When removing the magnet clutch, push the hook
1
, out of the slot and slide the
magnet clutch in the arrow direction
2
, in order to avoid welded point damage.
Here the upper stage of paper feed unit is shown, but the middle and the lower are
the same as the upper.
Caution
"D" cut
Hook
Hook
"D" cut
Welded point
(Front view)
Magnet clutch
(Side view)
Welded point
2
1
3-2
SV205
3
2
1
4
3.2 Disassembly and Assembly
1) Replacement of the paper feed roller/pick up roller
1
1
Remove the right (back) cover and the
right (front) cover. (1 screw each)
2
Open the paper feed cover.
3
Remove the paper feed cover stoppers.
NOTE: Close the cover slightly and lift the
end of the link up out of the slot.
4
Loosen the two locking screws installed
at 45 degrees (1 each side) at the cover
base pins.
5
Remove the paper feed cover.
2
1
Pull out the paper drawer.
2
Remove the connector of the paper feed
unit.
3
Remove the screws (x 4).
4
Remove the paper feed unit from the
system console.
3
1
Remove the touch ring
2
Remove the bracket guide.
3
Remove the paper feed roller.
4
Lifting the pick up roller, remove the pick
up roller.
SV202
SV002
2
2
5
4
5
3
3
4
Paper feed cover
Cover stopper
SV202
3
2
SV205
3-3
Maintenance
SV203
1
2
3
2) Replacement of the DFP roller/torque limiter
1
• By procedure 1 and 2, remove the paper
feed unit.
1
Remove the screws. (x 2)
NOTE: Be carefull not to damage the
sensors.
2
Remove the lower roller cover.
3
Remove the touch ring.
4
Remove the DFP roller.
5
Remove the torque limiter.
NOTE: Confirm the setting direction of
torque limiter.
(Clock wise from shaft end.)
SV206
3) Replacement of the middle roller
1
• By procedure 1 and 2, remove the paper
feed unit.
1
Remove the E ring of middle roller gear.
2
Remove the touch ring and bearing.
3
Move the middle roller sideways and
remove it.
NOTE: Be carefull not to lose the shock
spring located inside the drive
gear.
SV203
SV206
3
4
5
2
1
1
4-1
Electrical
components
4. Electrical components
4.1 Electrical Components Operation
The circuit construction of the electrical components in system console is shown in
the figure.
Here, the upper stage is explained.
• When the paper feed drawer is inserted into the system console, the combination
of low level, and upper limit sensors tell the CPU to switch, the transistor base of
IC602 to 0v. Then, DT602 is turned off. Transistor Q601 is turned on energizing
the lift motor, rotating it.
• When paper reaches the upper limit (by the lift motor), the sensor lever attached
to the paper upper limit detecting sensor is lifted up and actuates the sensor. The
signal from the paper upper limit detecting sensor (LBSN1) goes high and turns
on transistor DT603, turning off transistor Q601, and stopping the lift motor. The
signal is inputted into and read by IC606.
• When copying starts, the paper feed motor and the system console paper feed
roller clutch are turned on. If the upper paper drawer is selected, the upper paper
feed roller clutch is turned on. After the paper feed solenoid is turned on, the
paper in the drawer is sent to the copier by the paper transfer roller and the paper
feed roller.
• When paper reaches the paper pass sensor, the sensor lever detects paper
passing. Photosensors such as the paper detecting sensor output 0v when the
sensor levers are detected by paper passing and 5V when no paper is present.
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