Service manual

Malfunction Causes and Solutions
SM 4-25 M000/M009
Trouble-
shooting
4.4 MALFUNCTION CAUSES AND SOLUTIONS
4.4.1 FUSER ERROR
Description:
All LEDs are blinking
Check... Solutions
1. Check whether thermostat, AC wire,
and heat lamp are open or not.
2. Check whether thermistor is open or
not.
3. Heat lamp ON/OFF test
4. Operation is impossible due to a gear
of a fuser being melted.
1. Replace the fuser if the thermostat is
open.
2. Replace the fuser if a thermistor sensor
is located deep inside of a sponge.
3. Check whether the overheat mode
circuit is operating normally or not.
4. Replace the fuser.
4.4.2 LSU (LASER SCANNING UNIT) ERROR
Description:
“PMOTOR ERROR/HSYNC ERROR”
Check... Solutions
1. Check whether the LSU (Laser
Scanning Unit) connector is
disconnected or not.
2. Check whether the LSU motor is
rotating or not.
3. Check the HSYNC signal.
1. Replace the LSU.
2. Replace the main board if the same
error occurs again after replacing the
LSU.
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA