Ricoh A-P4 - Page 157

• LCT lift motor connector or harness loose, broken, or defective, or LCT lift motor
defective
• Upper limit sensor connector or harness loose, broken, or defective, or sensor is
defective.
• Pick-up solenoid connector or harness loose, broken, or defective or solenoid is
defective
• Paper end sensor connector or harness loose, broken, or defective, or sensor is
defective
520 D
Fusing/Feed-Out Motor Error
The PLL lock signal remains LOW for 2 s
while the feed development motor is oper-
ating.
• Motor overload due to an obstruc-
tion
• Motor drive board defective.
541 A
Fusing thermistor open
• Fusing thermistor disconnected
• Fusing thermistor connector defec-
tive
• Fusing thermistor damaged,
warped, or out of position
• Input voltage less than 15% of the
standard input voltage
After the hot roller center thermistor temper-
ature reached 45
o
C (113
o
F), the center
fusing temperature failed to reach 60
o
C
(140
o
F) within 2 sec. for 5 counts at 0.1 sec.
intervals.
-or-
After the hot roller end temperature thermis-
tor reached 45
o
C (113
o
F), the end fusing
temperature failed to reach 57
o
C (135
o
F)
within 2 sec. for 5 counts at 0.1 sec. intervals.
542 A
Fusing temperature warm-up error • Fusing lamp connector or harnesses
loose, broken or defective
• Poor fusing unit drawer connector
loose
• Thermistor warped, broken, or out of
position
• Thermostat has tripped
• PSU defective
• BICU defective
The fusing temperature did not reach the fus-
ing reload temperature of 45
o
C (113
o
F)
within 26 sec.
4. Troubleshooting
156
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