Panasonic DP-C321 Service Handbook page 100

3-26
004-642 BELT EDGE CHECK FAILURE
Description IBT BELT EDGE adjustment failure.
BSD on : CH9.19 CH9.31A
Procedure
Is the Actuator of the Edge Sensor touching the BELT?
Y N
Check the installation status of the Actuator.
Turn the power On. Is +3 VDC to +1 VDC measured between
the I/F PWB J533-A11 (+) and GND (-)?
Y N
Is +5 VDC measured between the I/F PWB J533-A9 (+)
and J533-A10 (-)?
Y N
If the voltage between the I/F PWB J533-A9 (+) and
the J533-A10 (-) is less than +5 VDC after closing the
FRONT door, replace the MCU MF PWB.(PL13.1)
Is +5 VDC measured between the I/F PWB J533-A11 (+)
and GND (-)?
Y N
Is 0 VDC measured between the I/F PWB J533-A11
(+) and GND (-)?
Y N
Check the wire between the I/F PWB J533 and
the IBT EDGE SENSOR J119 for an open
circuit and poor contact. If no problems are
found, replace the IBT EDGE SENSOR
(PL5.4). If the problem persists, replace the
MCU PWB.(PL13.1)
Check the wire between the I/F PWB J533-A11 and
the IBT EDGE SENSOR J119-2 for an open circuit or
poor contact.
Replace the IBT EDGE SENSOR.(PL5.4)
Is +24 VDC measured between the I/F PWB J530-A9 (+) and
GND (-)?
Y N
Check the +24 VDC circuit to the I/F PWB J530-A9 by
referring to Chapter 4 Wiring Data.
(WN4.3.13 +24 VDC-1) (WN4.3.14 +24 VDC-2)
(WN4.3.15 +24 VDC-3) (WN4.3.16 +24 VDC-4)
Remove the IBT ASSY and run DC330 [004-001].
Is the IBT STEERING MOTOR rotating?
Y N
Check the wire between the I/F PWB J550 and the IBT
STEERING MOTOR J207 for an open circuit and poor
contact.
Is an open circuit or poor contact found?
Y N
Replace the MCU PWB (PL13.1). If the problem
persists, replace the I/F PWB (PL9.1) and the IBT
STEERING MOTOR.(PL1.3)
Repair the open circuit or poor contact.
Check the installation status of the IBT BELT. If no problems
are found, replace the MCU PWB.(PL13.1)
004-650 IOT TIME OUT CYCLE DOWN FAILURE
Description The PRINT NG processing continued for 2 mins
and above.
BSD on : CH3.1A CH3.6A
Procedure
Check the wire between the ESS PWB and the MCU PWB for a
poor contact. If no problems are found, replace the ESS
PWB.(PL13.1)
Chapter 3 Troubleshooting
004-908 2nd BTR UNIT LIFE END
Description The life of the 2nd BTR UNIT ended.
BSD on : CH9.31A
Procedure
If the problem persists after replacing the 2nd BTR UNIT,
replace the MCU PWB.(PL13.1)
If the problem persists after replacing the MCU PWB, replace
the MCU MF NVM PWB.(PL13.1)