Cause/Detective section
Procedures
Result
CountermeasureItems to be checked
Wire or timing belt is cut
or removed.
1
Are the optical system driving wire and
timing belt attached properly?
No Attach the wire and timing belt properly.
There is a foreign object
on the optical system
moving way.
2
Is the optical system slide shaft
clean?Does the optical system move
smoothly when the optical system dri-
ving timing pulley is rotated manually?
No
Check that there is no foreign object on
the optical system slide shaft and that
nothing contacts the optical system.
Clean, oil or correct, Reference oil the
slide shaft after cleaning it.
3
Measure the voltage between the regu-
lated power supply, CN2-1 (+) and
CN2-2(GND) with the tester.
Is it +24 V?
No Follow the procedure (6).
Drive PCB Unit 4
Is the cause cleared by replacing the
drive PCB Unit?
Yes Finish
Main PCB Unit
5
Is the cause cleared by replacing the
main PCB Unit?
Yes Finish
Optical system stepping
motor
No
Check the bundled wire and connector.
Replace the optical system stepping
motor.
Regulated power supply 6
Remove the regulated power supply,
CN2, 3 and 5 and follow the procedure
(3). Is it +24V?
No
Check the first side bundled wire con-
nector. If OK, replace the regulated
power supply.
7
Follow the procedure (6) and insert the
regulated power supply, CN2. Is the
voltage +24V?
Yes Follow the procedure (10).
ADF 8
Follow the procedure (6) and insert the
regulated power supply, CN3. Is the
voltage +24V?
Yes
At the ADF or ADF relay bundled wire,
24V produces a short-circuit to GND.
Thermal head
9
Is the cause cleared by replacing the
thermal head?
Yes Finish
Thermal head PCB Unit No
The thermal head PCB Unit is defec-
tive.
Motors 10
Remove the drive PCB Unit CN2 and
follow the procedure (3). Is the voltage
+24V? (CN1 is inserted)
Yes
At the CN3 bundled wire or motors
+24V produces a short-circuit to GND.
Motors
11
Remove the drive PCB Unit CN3 and
follow the procedure (3).
Is the voltage +24V?
(CN1 and 2 are inserted.)
Yes
CN3 bundled wire or motors produces
a short-circuit to GND.
Drive PCB Unit No Replace the drive PCB Unit.
To Next Page
Loading...
Need help?
General