Ricoh TH-C1b, Руководство по обслуживанию

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SERVICE CALL 10 February 2005
4-8
No.
Definition
Symptom Possible Cause
Fusing fan motor error 530 D
•
The main power is turned on.
→
The fusing fan lock signal is
detected for 2 seconds.
•
The fusing fan is activated.
→
The
fusing fan lock signal is not
detected for 2 seconds.
•
Defective fusing fan
•
Disconnected or broken harness of the
fusing fan
Thermistor disconnection (heating roller) 541 A
The fusing unit starts warm up to the
print ready temperature.
→
The
temperature does not reach 0°C for
10 seconds.
•
Defective thermistor
•
Thermistor loose connection
•
Defective connector
Fusing warm-up timeout (heating roller) 542 A
The main switch is turned on or a
cover is closed.
→
The heating roller
does not reach the warm-up
temperature within 4 seconds.
•
Defective lamp (loose connection,
thermostat failure, PSU, thermostat)
•
Incorrect detection (loose thermistor
connection, fusing - drawer loose
connection)
Overheat error (heating roller) 543 A
The heating roller thermistor detects
220°C for 5 seconds. •
Short circuit
•
Defective BICU board
•
Defective PSU
Overheat error (heating roller) 544 A
The heating roller thermistor detects
230 °C. •
Short circuit
•
Defective BICU board
•
Defective PSU
Full power error (heating roller) 545 A
Fusing unit warm-up is complete.
→
The heating roller stops turning.
→
The heating roller lamp keeps
outputting the maximum power for 12
seconds.
•
Thermistor loose connection
•
Fusing - drawer loose connection
Unstable temperature (heating roller) 546 A
The heating roller thermistor detects
unstable temperature increases or
decreases within 60 seconds. •
Thermistor loose connection
•
Fusing - drawer loose connection
Zero cross error 547 A
The main power is turned on and the
machine checks how many zero-
cross signals are generated during
500 ms.
→
If the number of zero-cross signal
generated is more than 66 or less
than 45 and when this condition is
detected 10 consecutive times, this
code is displayed.
•
Replace the PSU.
•
FU12 is open.
Thermistor disconnection (pressure roller) 551 A
The pressure roller thermistor detects
7°C or lower for 80 seconds.
•
Thermistor loose connection
•
Defective harness
•
Defective connector