Ricoh B121 - Page 148

SERVICE CALL CONDITIONS
B121 Series/B259 Series 4-6 SM
No.
Definition
Symptom Possible Cause
Fusing overheat error (rear) 553 A
The fusing temperature is over 230°C
for 1 second (detected by the
thermistor).
• Fusing thermistor defective
• Power supply board defective
Fusing lamp overheat error (rear) 555 A
After the fusing temperature reaches
the target temperature, the fusing lamp
does not turn off for 20 consecutive
seconds.
• Fusing thermistor defective or out of
position
• Power supply board defective
Unstable fusing temperature (rear) 556 A
The fusing temperature varies 50°C or
more within 1 second, and this occurs 2
consecutive times.
• Thermistor defective or out of
position
• Power supply unit defective
Left exhaust fan motor error 590 B
The CPU detects an exhaust fan lock
signal for more than 5 seconds.
• Loose connection of the exhaust fan
motor
• Too much load on the motor drive
Rear exhaust fan motor error 591 B
The CPU detects an exhaust fan lock
signal for more than 5 seconds.
• Loose connection of the exhaust fan
motor
• Too much load on the motor drive
Communication error between BICU and ADF 620 B
The BICU does not receive a response
from the ADF main board for 4 seconds
or more.
The BICU receives a break signal from
the ADF main board.
• Poor connection between the BICU
and ADF main board (DF connector)
• ADF main board defective
• BICU defective
ADF connection error 621 B
An incorrect ADF (an ADF for some
other copier) is detected. (for Basic and
MFP machines)
An ADF (including the correct ADF) is
installed while the copier is in the
energy saver mode. (for MFP machine
only)
• ADF incorrect (The ADF for
B039/B040/B043 is installed on a
B121/B122/B123.)
• The connector of the ADF is removed
while the machine is in the energy
saver mode.
Accounting error 1 632 C
An error is detected during the
communication with the MF accounting
device.
• Accounting device defective
• Loose connection
Accounting error 2 633 C
After communication is established with
the MF accounting device, a brake
signal is issued.
• Accounting device defective
• Loose connection
Accounting RAM error 634 C
An error is detected in the RAM that
saves the information on the MF
accounting.
• Accounting device defective
Accounting battery error 635 B
An error is detected in the battery that
is in the MF accounting device.
• Accounting device defective