Ricoh A-P3 Service Manual page 120

6 November, 2001
SC Level
504 C 4th tray lift malfunction (optional
paper tray unit)
Paper height sensor does not
activate after the tray lift motor is on
for 13 s. If the main power switch is
on when the paper is already at the
feed height, the paper height position
is detected again, and the paper
height sensor should de-activate
within 5 s after the paper bottom
plate starts to drop. If it does not
deactivate within 5 s after four
consecutive attempts, the tray lift
motor halts. After two attempts to re-
set the paper tray, this SC is issued
and tray control halts.
506 C Paper tray unit main motor lock
(optional paper tray)
A main motor lock signal is detected
for more than 50 ms during rotation.
507 C LCT main motor lock (optional LCT)
A main motor lock signal is detected
for more than 50 ms during rotation.
510 C LCT tray malfunction
• LCT lift sensor does not activate
within 18 seconds after the LCT lift
motor turns on.
• After paper end, LCT lift sensor
does not activate within 4 s after 4
consecutive attempts.
• After lowering, tray motor does not
switch off within 5 s.
F U
USING NIT
NOTE: When an SC error is issued for the fusing system (SC54x), the printer cannot be
released from the SC status by cycling the machine off and on. The service
technician must execute SP5810 to restore the printer to normal operation.
541 A Fusing thermistor open
• The fusing temperature detected
by the thermistor was below 7°C
(44.6°F) for 5 seconds
• 2 seconds after reaching 45°C
(113°F) the temperature does not
reach an additional 15
after checking twice.
Symptom
o
C (59°F)
4-7
SERVICE CALL CONDITIONS
Possible Cause
• Tray lift motor defective or
disconnected
• Height sensor defective or
disconnected
• Paper tray unit main motor
defective
• Paper tray unit main motor
connection loose
• Too much load on the drive
mechanism
• LCT main motor defective
• Paper tray unit main motor
connection loose
• Too much load on the drive
mechanism
• LCT lift motor defective or
disconnected.
• Upper limit sensor defective or
disconnected
• Pick-up solenoid defective or
disconnected
• Paper end sensor defective
• Fusing thermistor disconnected
• Fusing thermistor connector
defective
• Fusing thermistor damaged or
warped
• Fusing temperature signal –15%
less than the standard input
voltage