Ricoh B264 Service Manual page 237

510 B LCT tray malfunction
1) One of the following has occurred:
2) The LCT lift sensor does not activate for more than 18 seconds after the LCT
lift motor turned on.
3) The LCT lower limit sensor does not activate for more than 18 seconds after
the LCT lift motor turned on.
4) The LCT lift sensor is already activated when the LCT lift motor turns on.
5) After the paper end sensor is 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.
6) The 4) state has been detected 3 times in succession.
• LCT lift motor defective or disconnected.
• Upper limit sensor defective or disconnected
• Pick-up solenoid defective or disconnected
• Paper end sensor defective
520 D 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 B264
(35 cpm)]/14 seconds [for the B265 (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.
544 A Fusing overheat error (hardware circuit
detection)
The dual monitoring circuitry of the
BICU detects extremely high
temperature and tripped the relay
circuit off.
SM
o
F) for 5
o
F) the temperature does not
o o
C (59 F) after
o
C the fusing
4-9
SERVICE CALL CONDITIONS
• Motor lock caused by overload.
• Motor driver defective.
• Fusing thermistor disconnected
• Fusing thermistor connector
defective
• Fusing thermistor damaged or
warped
• Fusing temperature –15% less than
the standard input voltage
• Fusing lamp defective
• Poor fusing unit connector
o
C • Thermistor warped or broken
• Thermostat has tripped
• BICU defective
• Power supply board defective
• Power supply unit defective
• I/O board (IOB) defective
• BICU defective
• Fusing thermistor defective
• Power supply unit defective
• I/O board (IOB) defective
• BICU defective
• Fusing thermistor defective
B264/B265