3-33
Chapter 3 Troubleshooting
006-371 LAMP FAILURE
Description
Open circuit of the LAMP was detected.
BSD on : CH6.2 CH6.12A
Procedure
Enter
DC330
[006-002] and turn it On. Is EXPOSURE LAMP
lit on?
Y
N
Turn Off the power. Remove the following covers:
• TOP COVER
• IIT REAR COVER
Turn On the power.
Is +24 VDC measured between the IIT/IPS PWB J725-2
(+) and GND (-)?
Y
N
Visually check the F6 Fuse on the IIT/IPS PWB.
Has the Fuse gone off?
Y
N
Turn Off the power. Disconnect the IIT LVPS
J702 and turn the power On.
Is +24 VDC measured between the IIT LVPS
J702-1 (+) and GND (-)?
Y
N
Check the power (ACH) to the IIT LVPS.
If no problems are found, replace the IIT
LVPS. (PL16.4)
The possible reason for this failure is the short
circuit/open circuit of the J702 and onwards of
the IIT LVPS. Check for a short circuit by
referring to Chapter 4 Wiring Data. (WN4.3.25
IIT+24 VDC)
Replace the IIT/IPS PWB. (PL16.3)
When
DC330
[006-002] is ON, is approx. +1.5 VDC
measured between the IIT/IPS PWB J724-3 (+) and GND
(-)?
Y
N
Replace the IIT/IPS PWB. (PL16.3)
Replace the following parts:
EXPOSURE LAMP (PL16.6)
LAMP WIRE HARNESS (PL16.6)
LAMP BALLAST PWB (PL16.6)
Check the following:
• The White Reference Board on the reverse side of the
PLATEN GLASS for excessive contamination
• The optical light path for contamination
If no problems are found, replace the following parts in
sequence:
• Lens KIT Assembly (PL16.4) (REP14.4.1)
• IIT/IPS PWB (PL16.3)
If the LAMP light quantity is insufficient, replace the
EXPOSURE LAMP (PL16.6) and LAMP BALLAST PWB
(PL16.6) in sequence.
006-372 LSU (ROS) POLYGON MOTOR FAILURE
Description
Revolution failure of the LSU (ROS) MOTOR.
BSD on : CH6.9 CH6.12C
Procedure
Run
DC330
[006-031].
Is +3.3 VDC measured between the MCU PWB J402-3 (+) and
GND (-)?
Y
N
Replace the MCU PWB. (PL13.1)
Run
DC330
[006-031].
Is +3.3 VDC measured between the MCU PWB J402-3 (+) and
GND (-)?
Y
N
Check the wire between the LSU (ROS) ASSY Relay
Connector J518-4 and the MCU PWB J402-3 for an open
circuit and poor contact.
Is +24 VDC measured between the MCU PWB J402-6 (+) and
GND (-)?
Y
N
Is +24 VDC measured between the MCU PWB J402-6 (+)
and GND (-)?
Y
N
Check the +24 VDC circuit to the MCU MF PWB
J402-6 by referring to Chapter 4 Wiring Data.
(WN4.3.15 +24 VDC-3)
Check the wire between the MCU PWB J402-6 and the
LSU (ROS) ASSY Relay Connector J518-1 for an open
circuit and poor contact.
Run
DC330
[006-031].
Is 0 VDC measured between the MCU PWB J402-4 (+) and
GND (-)?
Summary of Contents for Workio DP-C401
Page 4: ...This page is intentionally left blank ...
Page 5: ...Chapter 1 General ...
Page 22: ...1 16 Chapter 1 General 1 3 Type of Paper ...
Page 23: ...1 17 Chapter 1 General ...
Page 24: ...Chapter 2 Maintenance ...
Page 63: ...Chapter 3 Troubleshooting ...
Page 118: ...3 44 Chapter 3 Troubleshooting I F PWB PL9 1 MCU PWB PL13 1 ...
Page 445: ...Chapter 4 Parts List ...
Page 548: ......