Ricoh B079 Service Manual page 206

SERVICE CALL CONDITIONS
Code No.
510 C LCT tray malfunction
1) The LCT lift sensor does not
2) The LCT lower limit sensor does
3) The LCT lift sensor is already
4) After the paper end sensor is
5) The 4) state has been detected
520 C Fusing/Feed-Out Motor Error
The PLL lock signal remains LOW for 2
s while the feed development motor is
operating.
541 A Fusing thermistor open
The fusing temperature detected by the
thermistor was below 7°C (44.6
seconds, or 2 seconds after reaching
o
45 C (113
reach an additional 15
checking five times at 0.1 intervals.
542 A Fusing temperature warm-up error
The fusing temperature does not reach
the fusing standby temperature of 45
o
(113 F) within 9 seconds for the B079
(35 cpm) 14 seconds for the B082 (45
cpm) after switching on the main power
or closing the front cover, or 40
seconds after reaching 50
roller does not reach warm-up
temperature.
543 A Fusing overheat error (software
detection)
A fusing temperature of over 230°C
o
(446 F) is detected for 5 seconds by the
fusing thermistors at the center or at
either end of the fusing roller.
B079/B082
CÓPIA NÃO CONTROLADA
Symptom
activate for more than 18
seconds after the LCT lift motor
turned on.
not activate for more than 18
seconds after the LCT lift motor
turned on.
activated when the LCT lift
motor turns on.
actuated while the tray is
raising, the upper limit sensor is
not actuated within 5 s. A
message is displayed to remind
the user to set the paper and
tray control halts. Resetting the
display is done by opening and
closing the LCT door.
3 times in succession.
o
F) the temperature does not
o o
C (59 F) after
o
C the fusing
CÓPIA NÃO CONTROLADA
LCT lift motor defective or
disconnected.
Upper limit sensor defective or
disconnected
Pick-up solenoid defective or
disconnected
Paper end sensor defective
Motor lock caused by overload.
Motor driver defective.
Fusing thermistor disconnected
Fusing thermistor connector defective
Fusing thermistor damaged or warped
o
F) for 5
Fusing temperature –15% less than the
standard input voltage
Fusing lamp defective
Poor fusing unit connector
o Thermistor warped or broken
C
Thermostat has tripped
BICU defective
Power supply board defective
Power supply unit defective
I/O board (IOB) defective
BICU defective
Fusing thermistor defective
4-8
Possible Cause
SM