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4. Trouble codes
A. Trouble codes list
Main
Sub
Trouble content
code
code
E7
01
Duplex model memory
setup error, memory
not-detected error
03
HSYNC not detected.
04
CCD white level trouble
05
CCD black level trouble
12
Shading trouble
(White correction)
14
ASIC connection trouble
15
Copy lamp disconnection
trouble
16
Laser output trouble
L1
00
Feeding is not completed
within the specified time
after starting feeding.
L3
00
Return is not completed
within the specified time.
L4
01
Main motor lock
L6
10
Polygon motor lock
H2
00
Thermistor open detection The fusing thermistor is open.
H3
00
Heat roller abnormally high
temperature
H4
00
Heat roller abnormally low
temperature
U2
01
Counter sum check error
04
EEPROM serial
communication error
The memory is not set properly or the memory capacity is not set to the duplex setup (6M).
Cancel method: Set SIM 26-39 code number to 2.
LSU (laser diode, reception element, APC circuit) trouble
LSU drive circuit (ASIC) trouble
CCD drive circuit (CCD PWB, ASIC harness) trouble
Copy lamp lighting trouble (Copy lamp, invertor PWB)
CCD drive circuit (CCD PWB, ASIC, harness) trouble
Dirt on white plate for scanning white level
Improper connection between CPU and ASIC (pattern cut, improper connection of lead pin)
Copy lamp or copy lamp drive circuit (invertor PWB) trouble
Copy lamp disconnection
LSU (laser diode, reception element, APC circuit) trouble
LSU drive circuit (ASIC) trouble
When the mirror base is returned for the specified time (6 sec) in mirror initializing after turning on the power,
the mirror home position sensor (MHPS) does not turn OFF. Or when the mirror base is fed for the specified
time (about 6 sec) after start of copy return, the mirror home position sensor (MHPS) does not turn OFF.
When the mirror base is returned for the specified time (6 sec) in mirror initializing after turning on the power,
the mirror home position sensor (MHPS) does not turn ON. Or when the mirror base is returned for the
specified time (about 6 sec) after start of copy return, the mirror home position sensor (MHPS) does not turn
ON.
When the main motor encoder pulse is not detected for 100 msec.
The lock signal (specified rpm signal) does not return within a certain time (about 20 sec) from starting the
polygon motor rotation
The fusing temperature rises above 240°C.
The fusing temperature does not reach 185°C within 27 sec of turning on the power, or the fusing temperature
keeps at 140°C.
When the counter check sum value stored in the EEPROM is abnormal.
When a communication trouble occurs with the EEPROM.
AL-1551 SIMULATION, TROUBLE CODES 10-14
Detail of trouble
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