Trouble Codes - Sharp AL-1000 Service Manual

AL-1000/1010

4. Trouble Codes

Main code Sub code
E7 03
E7 04
E7 05
E7 12
E7 14
E7 15
L1 00
L3 00
L4 01
L6 10
H2 00
H3 00
H4 00
U2 01
U2 04
CH
-
(Blinking)
Trouble content
HSYNC cannot be LSU (laser diode, reception element, APC circuit) trouble
detected. LSU drive circuit (ASIC) trouble
CCD drive circuit (CCD PWB, ASIC harness) trouble
CCD white level trouble
Copy lamp lighting trouble (Copy lamp, invertor PWB)
CD black level trouble CCD drive circuit (CCD PWB, ASIC, harness) trouble
Shading trouble
Dirt on white plate for scanning white level
(white correction)
Improper connection between CPU and ASIC (pattern cut, improper connection
ASIC connection trouble
of lead pin)
Copy lamp or copy lamp drive circuit (invertor PWB) trouble Copy lamp
Copy lamp OFF trouble
disconnection
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
Feed is not completed
turn OFF. Or when the mirror base is fed for the specified time (about 6 sec)
within the specified time.
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)
Return is not completed
does not turn ON.Or when the mirror base is returned for the specified time
within the specified time.
(about 6 sec) after start of copy return, the mirror home position sensor (MHPS)
does not turn ON.
Main motor lock When the main motor encoder pulse is not detected for 100msec.
The lock signal (specified rpm signal) does not return within a certain time (about
Polygon motor lock
20sec) from starting the polygon motor rotation
Thermistor open detection The fusing thermistor is open.
Heat roller abnormally high
The fusing temperature rises above 240°C.
temperature
Heat roller abnormally low The fusing temperature does not reach 185°C within 27 sec of turning on the
temperature power, or the fusing temperature keeps at 140°C.
Counter sum check error When the counter check sum value stored in the EEPROM is abnormal.
EEPROM serial
When a communication trouble occurs with the EEPROM.
communication error
TD cartridge not installed Check if TD cartridge is installed.
Detail of trouble
10-11