AL-1551CS SIMULATION, TROUBLE CODES 10 - 15
4. Trouble codes
A. Trouble codes list
Main
code
Sub
code
Trouble content Detail of trouble
E7 01 Duplex model memory
setup error, memory not-
detected 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.
02 HSYNC not detected. LSU (laser diode, reception element, APC circuit) trouble
LSU drive circuit (ASIC) trouble
10 CCD black level trouble CCD drive circuit (CCD PWB, ASIC, harness) trouble
11 CCD white level trouble CCD drive circuit (CCD PWB, ASIC harness) trouble
Copy lamp lighting trouble (Copy lamp, inverter PWB)
12 Shading trouble
(White correction)
Dirt on white plate for scanning white level
16 Laser output trouble LSU (laser diode, reception element, APC circuit) trouble
LSU drive circuit (ASIC) trouble
F5 02 Copy lamp disconnection
trouble
Copy lamp or copy lamp drive circuit (inverter PWB) trouble
Copy lamp disconnection
H2 00 Thermistor open detection The fusing thermistor is open.
H3 00 Heat roller abnormally high
temperature
The fusing temperature rises above 240° C.
H4 00 Heat roller abnormally low
temperature
The fusing temperature does not reach 185°C within 27 sec of turning on the power, or the fusing
temperature keeps at 140°C.
L1 00 Feeding is not completed
within the specified time
after starting feeding.
(The scan head locking
switch is locked)
The white area and the black marking on the shading plate are used to obtain the difference in the CCD
level values for judgment of lock. When the difference in the levels of which and black is small, it is judged
that the black mark could not be scanned by lock and the trouble code “L1” is displayed.
L3 00 Return is not completed
within the specified time.
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.
L4 01 Main motor lock When the main motor encoder pulse is not detected for 100 msec.
L6 10 Polygon motor lock The lock signal (specified rpm signal) does not return within a certain time (about 20 sec) from starting the
polygon motor rotation
U2 01 Counter sum check error When the counter check sum value stored in the EEPROM is abnormal.
04 EEPROM serial
communication error
When a communication trouble occurs with the EEPROM.
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