Ricoh G104 Service Manual page 96

SERVICE CALL CONDITIONS
SC
[Level]
Symptom
532 Fan motor error
[D]
The fan motor "On" signal is
not detected for the
components below after the
drum motor for black is set
to "On".
• PSU fan
• Fusing unit fan
• Polygon motor fan
• Drive unit fan
• Exit paper fan
541 Thermistor error
[A]
The thermistor output is
less than 0°C for six
seconds.
542 Print ready temperature error
[A]
1. The heating roller
temperature increase
that is less than 67
degrees for 9 seconds
is detected five times
consecutively.
2. The fusing temperature
does not reach the print
ready temperature
within 15 seconds after
the fusing lamp was
controlled.
543 High temperature detection: Software
[A]
The thermistor detects
230°C for 0.2 seconds.
544 High temperature detection: Hard
[A]
The thermistor detects
250°C.
545 Heating lamp error
[A]
The fusing lamp is full-
powered for 8 seconds after
the heating roller reaches
the print ready temperature.
G104
CÓPIA NÃO CONTROLADA
Item
Possible Cause/Required Action
• Defective fan motor
1. If the error occurs again, one of the fans is
defective. Remove the covers, find the defective
fan and replace it.
• Disconnected thermistor
• Defective connector connection
• Defective thermistor
• Thermistor coming off
• Incorrect power supply input at the main power
socket
• Defective fusing lamp
• Defective thermistor
• Defective I/O board
• Defective EGB
• Defective thermistor
• Defective I/O board
• Defective EGB
• Defective fusing unit, PSU, or EGB
1. Replace the fusing unit.
2. Replace the PSU.
• Deformed thermistor
• Thermistor coming off
• Defective fusing lamp
4-12
CÓPIA NÃO CONTROLADA
SM