Gestetner B147 Service Manual page 225

SC No. Item
SC Thermistor 2 When the temperature
461- error (open detected by the thermistor 2,
001 circuit) which is at the right (paper
feed section) side of the laser
optics unit, is less than -30°C
for 10 seconds consecutively,
the BCU determines that the
circuit is opened and displays
this SC code.
SC Thermistor 2 When the temperature
461- error (short detected by the thermistor 2,
002 circuit) which is at the right (paper
feed section) side of the laser
optics unit, is higher than 70°C
for 10 seconds consecutively,
the BCU determines that the
circuit is shorted and displays
this SC code
SC 471 Transfer belt The transfer belt HP sensor
H.P. error signal does not change from
Low to High (home position) or
vice versa 1 second after the
transfer belt contact motor
turns on.
SC 481 Waste toner The waste toner vibrator does
vibrator error not operate.
SM
Definition Possible Cause
• Thermistor 2
defective
• Cable connection
error
• BCU defect
• Thermistor 2
defective
• Cable connection
error
• BCU defect
• Transfer belt unit not
set properly
• Defective transfer belt
H.P. sensor and/or
transfer belt sensor
• Defective transfer belt
contact motor
• Transfer belt unit
problem
• Loose connector
• Defective motor
Related
Troubleshooting Procedure
SCs
1. Turn the main switch off and on.
2. Check the cable connections.
3. Replace the thermistor.
4. Replace the BCU.
1. Turn the main switch off and on.
2. Check the cable connections.
3. Replace the thermistor.
4. Replace the BCU.
1. Turn the main switch off and on.
2. Reset the transfer belt unit.
3. Clean or replace the transfer belt
sensor.
4. Replace the transfer belt contact
motor.
5. Check the contact and release
mechanism of the transfer belt unit.
1. Turn the main switch off and on.
2. Replace the motor.
4-23
SC TABLE
Type
D
D
D
D
B147/B149/B190