Sharp Mx-b200 Service Manual

							MX-B200  SIMULATION, TROUBLE CODES  10 - 14 46 18 Image contrast adjustment 
(300dpi)[Function]
Contrast is set for each mode.
When this simulation is executed, the current set value is displayed in 2 digits (Default: 50).
Change the set value and press [START] key to make a copy under the set value.
When the set value is increased, the contrast becomes higher. When the set value is
decreased, the contrast becomes lower.
In this case, only Exp.3 copy is made. When, however, the setting is made to make higher con-
trast, Exp.1 and Exp.5 copies also become in higher contrast. When made to a lower contrast,
Exp1. and Exp.5 copies become lower contrast, too.
Press [Exposure mode selector] key to switch the mode. The set value of the selected mode is
displayed on the LED/display. 
(Adjustment value: 1 – 99)
[Operation]
The operation is similar to simulation 46-01.
19 Exposure mode setup 
(AE mode)[Function]
<
γ table setting>
When this simulation is executed, the code number of the current set gamma table is displayed.
(Default: 2)
Enter the code number corresponding to the desired gamma table, and press [Exposure mode
selector] key to change the mode and write into the EEPROM.

When setting the 
γ table, press [Exposure mode selector] key to change to the AE operation
mode, and the current set code number of the AE operation mode is displayed. (Default: 0)
Enter the code number corresponding to the desired AE operation mode and press [Exposure
mode selector] key to change the mode and write into the EEPROM.
 
When [Exposure mode selector] key is pressed in AE operation mode setting, the mode is
changed to the PHOTO image process setting and the code number of the current set PHOTO
image process setting is displayed. (Default: 1)
Enter the code number corresponding to the desired PHOTO image process setting and press
[Exposure mode selector] key to change the mode and write into the EEPROM.
[Operation]
The operation is similar to simulation 46-01. Main 
codeSub 
codeContents Details of function/operation
Mode Display lamp Default
AE mode (300dpi) AE mode lamp 50
TEXT mode (300dpi) TEXT mode lamp 50
PHOTO mode PHOTO mode lamp 50
TS mode (TEXT) (300dpi) TEXT mode lamp
PHOTO mode lamp50
TS mode (AE) (300dpi) AE mode lamp
PHOTO mode lamp50
Dither mode AE mode lamp
TEXT mode lamp
PHOTO mode lamp50
Mode Display lampCode 
numb
erSetting contentRemar
k
γ OFF1 Image quality priority mode
2Toner consumption priority 
modeDefault
AE   AE  0 Lead edge stop Default
1 Real time process
PHOT
OPHOTO1 Error diffusion process Default
2 Dither process 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 15 46 20 SPF exposure correction 
(Option)[Function]
Used to adjust the exposure correction amount in the SPF mode. The adjustment is made by
adjusting Vref voltage variation for the OC mode. 
When this simulation is executed, the current set value is displayed in 2 digits (Default: 50).
Change the set value and press [START] key to save the setting and make a copy. 
When the set value is increased, copy becomes darker. When the set value is decreased, copy
becomes lighter. (Adjustment range: 1 – 99)
[Operation]
The operation is similar to simulation 46-01.
29 Image contrast adjustment 
(600dpi)[Function]
Contrast is set for each mode.
When this simulation is executed, the current set value is displayed in 2 digits (Default: 50).
Change the set value and press [START] key to make a copy under the set value.
When the set value is increased, the contrast becomes higher. When the set value is
decreased, the contrast becomes lower.
In this case, only Exp.3 copy is made. When, however, the setting is made to make higher con-
trast, Exp.1 and Exp.5 copies also become in higher contrast. When made to a lower contrast,
Exp1. and Exp.5 copies become lower contrast, too.
Press [Exposure mode selector] key to switch the mode. The set value of the selected mode is
displayed on the LED/display. (Adjustment value: 1 – 99)
[Operation]
The operation is similar to simulation 46-01.
30 AE limit adjustment[Function]
Used to set the limit value in AE and AE (toner save).
Change the setting and press [START] key to write the setting into the EEPROM. The machine
goes into the sub code entry standby mode.
By pressing [Exposure mode selector] key, setting is changed. 
(Setting range: 0 – 255, Default: 196)

When simulation 26-06 (Destination setting) or simulation 46-19 Auto Exposure mode is
changed, the setting of this simulation is also changed to the default in connection.
[Operation]
The operation is similar to simulation 46-19. Main 
codeSub 
codeContents Details of function/operation
Mode Display item Display lamp Default Remark
SPF SPF TEXT mode lamp 50
Mode Display lamp Default
AE mode (600dpi) AE mode lamp 50
TEXT mode (600dpi) TEXT mode lamp 50
PHOTO mode PHOTO mode lamp 50
TS mode (TEXT) (600dpi) TEXT mode lamp
PHOTO mode lamp50
TS mode (AE) (600dpi) AE mode lamp
PHOTO mode lamp50
Dither mode AE mode lamp
TEXT mode lamp
PHOTO mode lamp50
Mode Display lamp Remark
Limit value for AE (OC) AE mode lamp
Limit value for AE (OC) 
(toner save)TEXT mode lamp
Limit value for AE (SPF) AE mode lamp
PHOTO mode lamp
Limit value for AE (SPF)
(toner save)TEXT mode lamp
PHOTO mode lamp 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 16 46 31 Image sharpness 
adjustment[Function]
Used to adjust sharpening/blurring of image in each mode.
When this simulation is executed, warm-up and shading are performed and the current set
value is displayed. (Default: 1)
Change the set value and press [START] key to make a copy under the set conditions.
To change the mode, press [Exposure mode selector] key. The code number of the selected
mode is diplayed on the LED/display.
[Operation]
The operation is similar to simulation 46-01.
32 Copier color reproduction 
setup[Function]
Used to set color reproduction in each mode. Colors easy to be copied and colors difficult to be
copied can be switched.
* This setting has virtually no effect on black-and-white documents.
When this simulation is executed, warm-up and shading are performed and the current set
value is displayed. (Default: 0)
Press [START] key to make a copy under the set conditions . At that time, color components are
changed for used in copying.
To change the mode, press [Exposure mode selector] key. The code number of the selected
mode is displayed on the LED/display.
[Operation]
The operation is similar to simulation 46-01. Main 
codeSub 
codeContents Details of function/operation
Image quality  Setting No Remark
Blurring 0
Standard 1 Default
Sharpening 2
Mode Display lamp Default
AE mode  AE mode lamp 1
TEXT mode  TEXT mode lamp 1
PHOTO mode  PHOTO mode lamp 1
TS mode  (TEXT) TEXT mode lamp
PHOTO mode lamp1
TS mode  (AE) AE mode lamp 
PHOTO mode lamp1
Dither mode AE mode lamp
TEXT mode lamp
PHOTO mode lamp1
Set value Colors easy to be copied Colors difficult to be copied
0 Purple, Blue, Red Yellow, Green, Water blue
1 Water blue, Green, Blue Purple, Red, Yellow
2 Yellow, Red, Green Blue, Water blue, Purple
Specification component Setting No Remark
Green 0 Default
Red 1
Blue 2
Mode Display lamp Default
AE mode (including TS) AE mode lamp 0
TEXT mode (including TS) TEXT mode lamp 0
PHOTO mode  PHOTO mode lamp 0 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 17 48 01 Front/rear (main scanning) 
direction and scan (sub 
scanning) direction 
magnification ratio 
adjustment[Function]
Used to adjust the magnification ratio in the main scan (front/rear) direction and sub scan direc-
tion.
Enter the adjustment value with [ ] [ ] key. Press [START] key to save the set value and make a
copy. (When the adjustment value is increased by 1, the magnification ratio is increased by 0.1%.)
The adjustment mode can be changed by pressing [Exposure mode selector] key. 
(Adjustment range: 1 – 99, Default: 50)
[Operation]
The operation is similar to simulation 46-01.
05 SPF mode sub scan 
direction magnification ratio 
in copying (Option)[Function]
Used to display the current SPF mode sub scan direction magnification ratio on the LED/dis-
play.
When [START] key is pressed, the entered data is acquired and saved into the EEPROM, and a
copy is made. (When the set value is increased by 1, the magnification ratio is increased by
0.1%.)
The adjustment mode can be changed by pressing [Exposure mode selector] key. 
(Adjustment range: 1 – 99, Default: 50)
For printing, regardless of the density mode and the density level, 
Density mode = TEXT
Density level = 3
* When there is no document in SPF, copy is inhibited.
[Operation]
The operation is similar to simulation 46-01.
49 01 Flash ROM program writing 
mode[Function]
When this simulation is executed, d is displayed on the display, the machine goes into the pro-
gram writing mode from PC to Flash ROM.
Use the writing tool on the PC and write the program. 
During writing, the display shows as follows:
After completion of download, turn OFF/ON the power to reset.
To enter the download mode, there is a method to use key operations as well as to use a simu-
lation. With the power OFF, press and hold [Exposure mode select] key + [ZOOM DOWN] key,
turn on the power. Main 
codeSub 
codeContents Details of function/operation
Mode Display lamp Default
Main scan direction 
magnification ratioTEXT mode lamp 50
OC mode sub scan direction 
magnification ratioPHOTO mode lamp 50
Mode Display lamp Default
Sub scan magnification ratio 
adjustment on the front 
surface of SPF documentAE mode lamp 50
* ∗ in an error display indicates the error position.Status DisplayPre-
heat 
lampReady 
lampRemark
Download data receiving d ON ON OFF
Date delete start d ON OFF ON
Data write (Boot section) d ON Blink OFF
Data write 
(Program section)d ON Blink Blink
During SUM CHECK d ON ON ON
Download complete 0FF 
ONOFF OFF
Error state E ∗ 
ONOFF OFF
1 Data reception error 6 Sum check (Loader section)
2 Loader function transfer 7 Sum check (Boot section)
3 FLASH ROM delete 8 Sum check (Program section)
4 FLASH ROM writing 
(Boot section)9 Sum check (EEPROM section)
5 FLASH ROM writing 
(Program section)10 Data error 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 18 50 01 Lead edge image position[Function]
Used to adjust the copy image position and the lead edge void amount on copy paper. The
adjustment is made by adjusting the image scan start position at 100% and the print start posi-
tion (resist roller ON timing). When this simulation is executed, the current set value is dis-
played in 2 digits. (Center value: 50)
When [Exposure mode selector] key is pressed, the setting mode and the display are changed.
Enter the adjustment value and press [START] key to save the set value and make a copy.
When the adjustment is made by the main cassette paper feed, the adjustment values of all the
paper feed ports become the same. (When the set value is increased by 1, shift is made by
0.1mm.)
* When printing with the manual paper feed tray, use paper of the letter size.
[Adjustment procedure]
1) Set the print start position (AE lamp ON) (A), the lead edge void amount (TEXT lamp ON)
(B), and the scan start position (PHOTO lamp ON) (C) to 0, and make a copy of a scale at
100%.
2) Measure the image loss (Rmm) of the scale.
Set C = 10 x R (mm). (Example: Set to 40.)
When the value of C is increased by 10, the image loss is decreased by 1mm. (Default: 50)
3) Measure the distance (Hmm) from the paper lead edge to the image print start position.
Set A = 10 x H (mm). (Example: Set to 50.)
When the value of A is increased by 10, the image lead edge is moved to the paper lead
edge by 1mm. (Default: 50).
4) Set the lead edge void amount to 
B = 50 (2.5mm). (Default: 50)
When the value of B is increased by
10, the void is extended by about
0.1mm. (For 25 or less, however, the
void amount is regarded as 0.)
∗The SPF adjustment is made by 
adjusting the SPF image scan start 
position after OC adjustment.
[Operation]
The operation is similar to simulation 46-
01. Main 
codeSub 
codeContents Details of function/operation
Mode Display lamp Default
Print start position 
(Main cassette paper feed)AE mode lamp
Main cassette lamp50
Print start position 
(2nd cassette paper feed)AE mode lamp
2nd cassette lamp50
Print start position 
(Manual paper feed)AE mode lamp
Manual feed lamp50
Image lead edge void 
amountTEXT mode lamp
Main cassette lamp50
Image scan start position PHOTO mode lamp
Main cassette lamp50
Image rear edge void 
amount 
(Cassette paper feed)AE mode lamp
TEXT mode lamp
PHOTO mode lamp
Main cassette lamp50
Image rear edge void 
tAE mode lamp
TEXT d l50
5mm
10mm
Distance from the paper lead edge 
to the image lead edge, H = 5mm
Image loss, R = 4mm
(Example) 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 19 50 06 Copy lead edge position 
adjustment (SPF) (Option)[Function]
Used to adjust the SPF copy lead edge.
When the adjustment value of the document scan position adjustment is increased by 1, the
scan start timing is advanced by 0.1mm.
The print result is shifted to the opposite direction of the scan start position.
The adjustment mode can be changed by pressing [Exposure mode selector] key. 
(Adjustment range: 1 – 99, Default: 50)
∗When there is no document in the SPF, copy is inhibited.
[Operation]
The operation is similar to simulation 46-01.
10 Center offset adjustment[Function]
Used to adjust the center offset position of copy images on copy paper and that in scanning
document.
When this simulation is executed, the current set value is displayed.
Enter the adjustment value and press [START] key to save the setting and make a copy. (When
the set value is changed by 1, the center is shifted by 0.1mm.)
When the adjustment value is increased, the center is shifted to right. When decreased, the
center is shifted to left.
The modes can be selected by pressing [Exposure mode selector] key.
When the set value is changed largely, the area outside the shading area may be scanned to
cause black streaks on the edges.
* When printing with the manual paper feed tray, use paper of the letter size.
* In the 2nd print center offset adjustment, print is made forcibly as 1to2/Short Edge from OC
regardless of duplex setting.
[Operation]
The operation is similar to simulation 46-01.
12 Document off-center 
adjustment[Function]
Used to adjust document scan off-center adjustment.
The adjustment modes can be selected by pressing [Exposure mode selector] key. 
(Adjustment range: 1 – 99, Default: 50)
When the adjustment value is increased, the print result is shifted to left.
[Operation]
The operation is similar to simulation 46-01. Main 
codeSub 
codeContents Details of function/operation
Mode Display lamp Default
Front surface document 
scan position adjustmentAE mode lamp 50
Rear edge void adjustment 
(SPF)PHOTO mode lamp 50
Mode Display lamp Default
Print center offset 
(Main cassette paper feed)AE mode lamp
Main cassette lamp50
Print center offset 
(2nd cassette paper feed)AE mode lamp
2nd cassette lamp50
Print center offset 
(Manual paper feed)AE mode lamp
Manual paper feed lamp50
Mode Display lamp Default
Platen document scan  AE mode lamp 50
SPF document front scan TEXT mode lamp 50 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 20 51 02 Resist quantity adjustment[Function]
Used to adjust the contact pressure of the main unit resist roller and the SPF resist roller onto
paper. When this simulation is executed, the current set value is displayed.
The adjustment modes can be selected by pressing [Exposure mode selector] key.
Enter the adjustment value with [ ] [ ] key and press [START] key to save the set value and
make a copy.
[Operation]
The operation is similar to simulation 46-01.
53 08 SPF scan position automatic 
adjustment (Option)[Function]
Place a A4 paper (white chart) so that it covers the SPF scan glass and the OC glass together,
and close the SPF.
When this simulation is executed, the current adjustment value is displayed as the initial display.
* Default is 50. Adjustment range is 1 – 99. Adjustment unit 1 = about 0.127mm
In case of AUTO, press [START] key, and the mirror unit scans from the home position to the
SPF scan position with the adjustment value displayed. The SPF glass cover edge position is
calculated from the difference between the SPF glass cover edge and the OC side document
glass CCD output level. If the adjustment is normal, the adjusted value is displayed. If abnor-
mal, the JAM LED lights up with the current set value displayed.
During the JAM LED is lighted, when [START] key is pressed again, execution is performed
again.
[Operation]
The operation is similar to simulation 46-01. (In MANUAL)
61 03 Polygon motor check 
(HSYNC output check)[Function]
When [START] key is pressed, HSYNC is performed and the polygon motor is rotated for 30sec.
At that time, the ZOOM lamp is lighted for 100msec every time when HSYNC is detected.
The sub code display is lighted. (After completion of execution, it blinks.)
63 01 Shading check[Function]
Used to display the detection level of white plate for shading.
When [START] key is pressed, the mirror base unit moves to the white plate for shading and the
copy lamp is lighted.
When the light quantity is stabilized, revision is made for every second, and the level of one
pixel at the center of CCD which is not corrected is detected and the value is displayed in deci-
mal values on the LED. Main 
codeSub 
codeContents Details of function/operation
 Mode Display lamp Default
Main cassette paper feed AE mode lamp
Main cassette lamp50
2nd cassette paper feed AE mode lamp
2nd cassette lamp50
Manual paper feed AE mode lamp
Manual paper feed lamp50
Mode Display lamp Default
SPF scan position auto 
adjustmentAE mode lamp 50
SPF scan position manual 
adjustmentTEXT mode lamp 50 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 21 63 02 Black level automatic 
correction[Function]
Used to acquire the black level target value used for the black level adjustment of white balance.
When this simulation is executed, the current correction value is displayed in 3 digits of 12bit
hexadecimal number.
Place the gray gradation chart (UKOG-0162FCZZ) used as the correction document so that the
density 10 (black side) comes on the left side and that the chart is upside down at the center of
the plate left center.
When [START] key is pressed, the mirror base unit scans the chart and calculates the correc-
tion value.
After completion of correction, the corrected value is displayed on the LED/display.
∗Default: 0
∗If the value is set to the default, operation is made with 0x60.
∗Incase of an error, the JAM lamp lights up.
∗If C key is pressed during canceling, the machine goes into the sub code entry standby mode 
after canceling.
12 Light quantity stabilization 
wait time setting[Function]
Used to set the wait time before entering the light quantity level stable evaluation process in the
light quantity stable process of white balance. (Note: The light quantity stable level in the previ-
ous light quantity stable state is used as the target. When the light quantity level reaches the
target during the wait time, the set time of this simulation is ignored and the operation enters the
stable evaluation process.)
When this simulation is executed, the currently set value is displayed.
Enter the adjustment value with [ ] [ ] key and press [START] key. The entered value is stored 
and the machine goes into the sub code entry standby mode.
Setting range: 0 – 99 (Complying with the light quantity stable wait time of 0 – 99sec.)
Default: 15 (15sec)
[Operation]
The operation is similar to simulation 9-04.
13 Light quantity stabilization 
band setting[Function]
When the difference between the maximum and the minimum values of the light quantity level
sampled for 3.2sec in the cycle of 100msec in the white balance light quantity stable process is
within the range set with this simulation, it is judged as the light quantity is stable. (Note: The
magnification ratio of the AFE gain setting is automatically reflected on the stable width.)
When this simulation is executed, the currently set value is displayed.
Enter the adjustment value with [ ] [ ] key and press [START] key. The entered value is stored
and the machine goes into the sub code entry standby mode.
Setting range: 1 – 99 (Light quantity stable width: Complying with 1 – 99 in 4095 gradations.)
Default: 16
[Operation]
The operation is similar to simulation 9-04. Main 
codeSub 
codeContents Details of function/operation
Chart back surface 
10 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 22
5. Trouble codes
A. Trouble codes list B. Details of trouble codes
64 01 Self print[Function]
The status of the optical section is ignored and printing of one page is made. Also when the
print command is received from the host, printing is made.
When this simulation is executed, warm-up is performed and the ready lamp is lighted. (Since,
however, the scanner is disabled, initializing is not made.)
Enter the code number and press [START] key to start paper feed from the selected cassette
and print in the selected pattern.
* For 4 – 99, flip.
[Operation]
The operation is similar to simulation 26-02. Main 
codeSub 
codeContents Details of function/operation
Code number Pattern  Display item
01by21 BY 2
1 Grid pattern  CHECK
2 White paper  WHITE
3 Black background BLACK
Mai n 
codeSub 
codeDetails of trouble
E7 01 Image data error
06 Image data decode error
10 Shading trouble (Black correction)
11 Shading trouble (White correction)
16 Abnormal laser output
20 LSU trouble
F2 64 Toner supply abnormality
70 Improper cartridge
74 Toner cartridge CRUM error
F5 02 Copy lamp lighting abnormality
H2 00 Thermistor open
H3 00 Heat roller high temperature detection
H4 00 Heat roller low temperature detection
L1 00 Feeding is not completed within the specified time 
after starting feeding.
L3 00 Scanner return trouble
L4 01 Main motor lock detection
31 Exhaust fan motor lock detection trouble
L6 10 Polygon motor lock detection
U2 00 EEPROM read/write error (Serial communication 
error)
11 Counter check sum error (EEPROM)Main 
codeSub 
codeDetails of trouble
E7 01
ContentImage data error
Detail Communication error with the E-sort 
module
MCU PWB trouble
ASIC trouble
Check 
and 
remedyCheck if it occurs again when the power 
is turned OFF and ON. If so, replace the 
PWB.
06
ContentImage data decode error
Detail Image expansion error
Cause MCU PWB abnormality
USB cable trouble
Check 
and 
remedyReplace the MCU PWB.
Replace the USB cable.
10
ContentShading trouble (Black correction)
Detail The CCD black scan level is abnormal 
when the shading.
Cause Improper connection of the CCD unit flat 
cable
CCD unit abnormality
MCU PWB abnormality
Check 
and 
remedyCheck connection of the CCD unit flat 
cable.
Check the CCD unit.
11
ContentShading trouble (White correction)
Detail The CCD white scan level is abnormal 
when the shading.
Cause Improper connection of the CCD unit flat 
cable
Dirt on the mirror, the lens, and the 
reference white plate
Copy lamp lighting abnormality
CCD unit abnormality
MCU PWB abnormality
(When occurred in the SPF scan 
position.)
Improper installation of the mirror unit
Check 
and 
remedyClean the mirror, lens, and the reference 
white plate.
Check the light quantity and lighting 
status of the copy lamp (SIM 05-03).
Check the MCU PWB. 
						

							MX-B200  SIMULATION, TROUBLE CODES  10 - 23 E7 16
ContentAbnormal laser output
Detail When the laser output is stopped, 
HSYNC is detected.
Cause Laser abnormality
MCU PWB abnormality.
Check 
and 
remedyCheck the laser emitting diode operation.
Replace the MCU PWB.
20
ContentLSU trouble
Detail The BD signal from the LSU cannot be 
detected in a certain cycle. (Always OFF 
or always ON)
Cause LSU connector or LSU harness defect or 
disconnection
Polygon motor rotation abnormality
Laser beams are not generated.
MCU PWB abnormality.
Check 
and 
remedyCheck connection of the LSU connector.
Execute SIM 61-03 to check the LSU 
operations.
Check that the polygon motor rotates 
normally.
Check that the laser emitting diode 
generates laser beams.
Replace the LSU unit.
Replace the MCU PWB.
F2 64
ContentToner supply abnormality
Detail The maximum toner supply time is greatly 
exceeded.
Cause CRUM chip trouble
Improper developing unit
Check 
and 
remedyReplace the CRUM chip.
Replace the developing unit.
70
ContentImproper cartridge
Detail The destination of the main unit differs 
from that of the CRUM.
When the life cycle information is other 
than Not Used (FFh).
Cause CRUM chip trouble
Improper developing unit
Check 
and 
remedyReplace the CRUM chip.
Replace the developing unit.
74
ContentToner cartridge CRUM error
Detail MCU
Cause Toner cartridge (CRUM) trouble.
MCU PWB trouble.
Connector/harness trouble.
Check 
and 
remedyReplace the toner cartridge.
Replace the MCU PWB.
Connector and harness check.
Main 
codeSub 
codeDetails of trouble
F5 02ContentCopy lamp lighting abnormality
Detail The copy lamp does not turn on.
Cause Copy lamp abnormality
Copy lamp harness abnormality
CCD PWB harness abnormality.
Check 
and 
remedyUse SIM 5-3 to check the copy lamp 
operations.
When the copy lamp lights up.
Check the harness and the connector 
between the CCD unit and the MCU 
PWB.
When the copy lamp does not light up.
Check the harness and the connector 
between the copy lamp unit and the MCU 
PWB.
Replace the copy lamp unit.
Replace the MCU PWB.
H2 00
ContentThermistor open
Detail The thermistor is open.
The fusing unit is not installed.
Cause Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection
The fusing unit is not installed.
Check 
and 
remedyCheck the harness and the connector 
between the thermistor and the PWB.
Use SIM 14 to clear the self diagnostic 
display.
H3 00
ContentHeat roller high temperature detection
Detail The fusing temperature exceeds 240°C.
Cause Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection.
Check 
and 
remedyUse SIM 5-02 to check the heater lamp 
blinking operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the 
control PWB.
When the lamp keeps ON.
Check the power PWB and the lamp 
control circuit on the MCU PWB.
Use SIM 14 to clear the self diagnostic 
display.
Main 
codeSub 
codeDetails of trouble