Ricoh DD 5450, Руководство по обслуживанию на месте, Страница: 266 / 403

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Chapter 7 Troubleshooting Guide
1
(3) Malfunction of Master Feed Clutch
Procedures Cause/Detective section Items to be checked Result Countermeasure
1 24V power supply
Measure the voltage between
CN51-5 (+24) and CN51-1 (GND) of
the 24V power supply with a tester.
Is it +24V?
NO Replace the 24V power supply.
2 Master feed clutch
Measure the voltage between CN3-
3 (+) and CN3-4 (GND) of the drive
PCB unit with a tester when the
master feed clutch is turned on?
Is it +24V?
YES Check the wiring and replace the
master feed clutch.
3
Drive PCB Unit
Does replacing the drive PCB unit
solve the problem?
YES Finish
Main PCB unit NO
Check the bundled wire and
connectors and then replace the
main PCB unit.
HELP-008→See page 311
(2) Optical System Dose Not Move Forward/Backward
Procedures Cause/Detective section Items to be checked Result Countermeasure
1
Wire or timing belt is cut
or removed.
Are the optical system driving wire
and timing belt attached properly?
NO
Attach the wire and timing belt
properly.
2
There is a foreign object
on the optical system
moving way.
Is the rail clean? Does the optical
system move smoothly when the
optical system driving timing pulley
is rotated manually?
NO
Check that there is no foreign
object on the rail and that nothing
contacts the optical system.
3
24V power supply
Measure the voltage between
CN51-5 (+24) and CN51-1 (GND)
of the 24V power supply with a
tester.
Is it +24V?
NO
Measure the voltage between L
and N of the 24V power supply
with a tester. If it is AC100V,
replace the 24V power supply.
YES Follow the procedure 4.
4
Drive PCB Unit
Does replacing the drive PCB unit
solve the problem?
YES Finish
Main PCB Unit
NO
Replace the main PCB Unit.
5
Motors
Remove the CN5 of the drive PCB
unit and follow the procedure 3.
Is it +24V?
YES
At the CN5 bundled wire or
motors, +24V produces a short
circuit to GND.