Sharp Mx-b200 Service Manual

							MX-B200  OPERATIONAL DESCRIPTIONS  7 - 6
(2) Manual multi paper feed operation
1) Before paper feed operation, the manual paper feed solenoid
(MPFS) is turned OFF as shown in the figure below.
2) When the Start key is pressed, the manual paper feed solenoid
(MPFS) turns on to disengage the manual paper feed latch.
A from the manual paper feed clutch sleeve A, rotating the
manual paper feed roller and the manual take-up roller. At the
same time, the manual paper feed stopper opens and the man-
ual take-up roller is pressed to the surface of the paper to start
paper feeding.3) When pawl C of the manual paper feed clutch sleeve is
engaged with the manual feed latch, the manual feed stopper
falls and the manual take-up roller rises. At that time, the man-
ual paper feed roller is rotating.
4) The lead edge of the transported paper is pressed on the resist
roller by the transport roller. Then the paper is stopped tempo-
rarily to allow synchronization with the lead edge of the image
on the OPC drum.
From this point, the operation is the same as the paper feed
operation from the tray. (Refer to 7-5 - 8.)
5) The solenoid turns off to close the gate and return to the initial
state.
OF
MPFSFCA
ON
MPFSA C
ON
MPFSA
C
OF
MPFSF
A
C 
						

							MX-B200  OPERATIONAL DESCRIPTIONS  7 - 7
(3) Conditions of occurrence of paper misfeed
a. When the power is turned on:
PPD or POD is ON when the power is turned on.
b. Copy operation
6. SPF section (Option)
A. Outline
It automatically copies up to 50 sheets of documents of a same
size. (Only one set of copies)
B. Document transport path and basic 
compositionC. Operational descriptions
a PPD1 jam PPD1 does not turn off within 4 sec after 
turning on the resist roller.
b PPD2 jam PPD2 is off immediately after turning on the 
resist roller.
PPD2 does not turn off within 1.2 sec after 
turning off the resist roller.
c POD jam  POD does not turn on within 2.9 sec after 
turning on the resist roller.
POD does not turn off within 1.5 sec - 2.7 sec 
after turning off PPD2.
1 Pickup roller 2 Sheet of document for paper feed
3 Set detection ACT 4 Document feed roller
5 Separation sheet 6 Paper entry sensor
7 PS roller D 8 Transport follower roller
9 Paper exit roller 10 Paper exit follower roller
11 Document tray
11
19345
210678
SPID ON
PSW ON
MRMT rotation
MM rotation
CPFS ONSPFM rotation Document set
Document set sensor
Document feed unit lamp ON
PPD ON
RRC ON
SPPD ON
POD ONCopy start
The scanner is shifted
to the exposure position.
(Copier side)
Main motor rotation
Paper feed
Synchronization
(Transfer)
(Fusing)(Document exit) Paper transport
(Exposure)
In the zooming mode, the magnification ratio in the sub 
scanning direction (paper transport direction) is adjusted
by changing the document transport speed.(Paper exit)SPF motor rotation
Document transport sensor
Document transport (SPF side) 
						

							MX-B200  OPERATIONAL DESCRIPTIONS  7 - 8
Time chart
SPF JAM generation condition
1) When SPPD is ON (document remaining) in initializing
2) When SPPD is not turned ON within about 1.5 sec (at 100% copy) after starting the document feed operation.
3) When SPPD is not turned OFF within about 4.7 sec (at 100% copy) after turning on SPPD.
4) When the OC cover is opened during document transport (during SPF motor rotation) (The SPF motor is stopped during document trans-
port, but the OC cover open error occurs instead of the SPF JAM.)
D. SPF open/close detection (book document detection)
SPF open/close detection (book document) detection is performed by detecting the interval between the reference lines on the white Mylar
attached to the paper exit guide (document scanning section) by the scanner (CCD) and detecting the varied quantity.
Note: When replacing the carriage unit, be sure to execute SIM41-06.
If SIM41-06 is not executed, the carriage unit may not read the reference line on the white Mylar, preventing the document from being fed.
PSW
MRMT
SPF M
CL
SPPD
260ms 182ms
SCANST
MAIN M
CPFS1
RRS
PPD1
PPD2
POD
B
A
B
A
A - B = Varied quantity of pixels
(pixel) (Floating)
(White Mylar)
(CCD) Reference line Reference line 
						

							MX-B200    DISASSEMBLY AND ASSEMBLY  8 - 1
[8] DISASSEMBLY AND ASSEMBLY
The disassembly and assembly procedures are described for the
following sections:
1. High voltage section
2. Operation panel section
3. Optical section
4. Fusing section
5. Tray paper feed/transport section
6. Manual paper feed section
7. Rear frame section
8 Power section
9. Reverse roller section
10. SPF section (Option)
1. High voltage section
A. List
B. Disassembly procedure
1) Press the side cover open/close button and open the side
cover.2) Push up the lock pawls (2 positions) of the side cover, and
remove the transfer charger.
C. Assembly procedure
For assembly, reverse the disassembly procedure.
D. Charger wire cleaning
1) Remove the charger cleaner from the manual paper feed unit. Before disassembly, be sure to disconnect the power cord 
for safety.
1. Do not disconnect or connect the connector and the 
harness while the machine is powered. Especially be 
careful not to disconnect or connect the harness between 
the MCU PWB and the LSU (MCU PWB: CN5) during the 
machine is powered. (If it is disconnected or connected 
during the machine is powered, the IC inside the LSU will 
be destroyed.)
2. To disconnect the harness after turning on the power, be 
sure to turn off the power and wait for at least 10 sec 
before disconnection. (Note that a voltage still remains 
immediately after turning off the power.)
No. Part name Ref.
1 Transfer charger unit
2 Charger wire
1)
2)
2)
1)
1)Transfer
chargerLock pawl rear
Lock pawl front
1) 
						

							MX-B200    DISASSEMBLY AND ASSEMBLY  8 - 2 2) Clean the TC front guide and the TC holder with alcohol.
3) Set the charger cleaner to the transfer unit, and move it recipro-
cally a few times in the direction of the arrow shown in the figure
below.
E. Charger wire replacement
1) Remove the TC cover and remove the screw.
2) Remove the spring and remove the charger wire.
3) Install a new charger wire by reversing the procedures (1) and
(2).
At that time, be careful of the following items.
 The rest of the charger wire must be within 1.5mm. Refer to Fig.1
 The spring hook section (charger wire winding section) must be
in the range of the projection section.
 Be careful not to twist the charger wire.
2. Operation panel section
A. List
B. Disassembly procedure
1) Open the side door, and Open the front cover.
1)
2)
3)4)
No. Part name Ref.
1 Operation panel unit
2 Operation PWB
1mm
1.5mm
Fig.1
1)
1)
2)
3)
Charger wire
Protrusion
1)
2) 
						

							MX-B200    DISASSEMBLY AND ASSEMBLY  8 - 3 2) Remove the screws (4 pcs.), the harness, and the operation
panel unit.
3) Remove four screws, and remove the operation cabinet.
4) Remove nine screws, and remove the operation PWB.
C. Assembly procedure
For assembly, reverse the disassembly procedure
3. Optical section
A. List
B. Disassembly procedure
1) Remove three screws, and remove the rear cabinet.
4) Remove the original cover.
5) Remove five screws. Remove the operation unit, and discon-
nect the connector.
6) Remove the right cabinet.
7) Remove the left cabinet.
8) Remove the screw, and remove the rear cover.
9) Remove the table glass.
1)
1)
1)
2)
1)
1\)
1\)1\)
1\)2\)
3\)3\)
3\)
3\)3\)
3\)
3\)3\)
4\)
NO. Part name Ref.
1 Copy lamp unit
2Copy lamp
3 Lens unit
2)4) 5)6)
7)
8)
1)
1) 1)
3)
1)
1) 
						

							MX-B200    DISASSEMBLY AND ASSEMBLY  8 - 4 10) Move the carriage to the position indicated on the figure.
11) Loosen the screw which is fixing the tension plate.
12) Move the tension plate in the arrow direction to release the ten-
sion, and remove the belt.
13) Remove the screw, and remove the rod stopper.
14) Remove the rod.
15) Lift the rear side of the carriage, remove the belt and the con-
nector, and remove the carriage.
C. Assembly procedure
CCD core
1) Insert the CCD-MCU harness into the CCD PWB of the car-
riage unit.
2) Attach the CCD-MCU harness to the duplex tape on the back
surface of the carriage unit. Clean and remove oil and dirt from
the attachment surface.
3) Pass the CCD-MCU harness through the square hole in the
base plate.
4) Attach the CCD-MCU harness to the base plate with duplex
tape.
5) Attach two cable fixing sheets to fix the CCD-MCU harness to
the base plate.
6) Pass the core through the CCD-MCU harness and fix the core.
7) Insert the CCD-MCU harness into the MCU PWB.
1) 2)
4)
3)
1) 2)3)
1)
2)4)
3)
Note: Attach the FFC to the base 
plate securely with duplex tape to 
prevent against coming loose.
Note: Attach the FFC to 
fit with the marking line.Marking line. 
						

							MX-B200    DISASSEMBLY AND ASSEMBLY  8 - 5
4. Fusing section
A. List
B. Disassembly procedure
1) Remove the connectors (3 pcs.) of the rear cabinet.
2) Open the side cover, remove two screws, and remove the fus-
ing unit.
3) Cut the binding band, remove the screw, and remove the ther-
mistor.4) Remove the screw and remove the resistor.
Remove the screw and remove the U-turn guide.
Note:Check to confirm that the fusing lower earth spring (A) does
not extend over the fusing bearing (B) after tightening the
screw.
Pressure roller section disassembly
5) Remove the three screws, remove the fusing cover lower on the
right side, and open the heat roller section. No. Part name Ref.
1 Thermistor
2 PPD2 sensor
3 Heater lamp
4 Pressure roller
5 Heat roller
1)
2)3)
2)
1)
2)
3)
Thermistor
1)
2)
3)
A
B
1)
5) 5)
6) 6)
4)3)
2) 
						

							MX-B200    DISASSEMBLY AND ASSEMBLY  8 - 6 6) Remove the screw and remove the PPD2 sensor.
7) Remove the plate spring on the right and remove the heater
lamp.
8) When opening the fusing unit, slide the fusing lower earth
spring in the arrow direction, and open the unit.
If the fusing unit is opened without sliding the fusing lower earth
spring, the fusing lower earth spring is deformed.
If the fusing lower earth spring is once deformed, the earth
function may not work properly. Replace the deformed spring
with a new one.9) Remove the spring, and remove the upper separation pawls (3
pcs.).
10) Remove the E-ring and remove the reverse gate.
11) Remove the pressure release levers on the right and the left
sides.
1)
2)
PPD2 sensor
1)
2)
Heater lamp
3)
1)2)
2) 1)
3)
1)
1) 
						

							MX-B200    DISASSEMBLY AND ASSEMBLY  8 - 7 12) Remove the pressure roller,  and the spring.
Note:Apply grease to the sections specified with an asterisk (*).
Grease: JFE552 UKOG-0235FCZZ
Heat roller disassembly
(Continued from procedure 4).)
5) Remove screws, remove the fusing cover, and open the heat
roller section.
Note:When opening the fusing unit, be careful not to deform the
fusing lower earth spring as described in the item 8) of
Pressure roller section disassembly.
6) Remove the C-ring and the fusing bearing, and remove the heat
roller.7) Remove the parts from the heat roller.
Note:Apply grease to the sections specified with *1.
Grease: JFE552 UKOG-0235FCZZ
8) Remove two screws and remove the thermo unit.
Note: The set temperature of the thermostat differs from that of the
current model.
C. Assembly procedure
For assembly, reverse the disassembly procedure.
1)
2) 2)1)
3) 3)
Pressure roller
1)
2) 2)
3) 3)
1)
2)
3)
Heat roller
Temperature
MX-B200 230°C
3)
2)
1)
1
1
1
1)
2)
3)