Panasonic DP-C321 Service Handbook page 96

3-22
004-358 ESS-IOT COMMUNICATION FAILURE
Description Communication failure between the ESS and IOT.
BSD on : CH3.1A CH3.6A
Procedure
Perform re-installation of the software (latest version).
Check the connection status of the MCU MF PWB and ESS
PWB connectors. If no problems are found, replace the MCU
PWB (PL13.1). If the problem persists, replace the ESS
PWB.(PL13.1)
004-361 DRUM MOTOR DRIVE FAILURE
Description Revolution failure of the DRUM MOTOR.
BSD on : CH9.1 CH9.31A
Procedure
Remove the DRUM ASSY (Y/M/C) and run DC330 [004-003].
Is the DRUM MOTOR rotating?
Y N
Is +5 VDC measured between the DRUM MOTOR J210-4
(+) and GND (-)?
Y N
Check the +5 VDC circuit to the DRUM MOTOR
J210-4 by referring to Chapter 4 Wiring Data.
(WN4.3.9 +5 VRET-1) (WN4.3.10 +5 VRET-2)
(WN4.3.11 +5 VRET-3) (WN4.3.12 +5 VRET-4)
Is +24 VDC measured between the DRUM MOTOR J210-
6 (+) and GND (-)?
Y N
Check the +24 VDC circuit to the DRUM MOTOR
J210-6 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)
Run DC330 [004-003].
Is 0 VDC measured between the DRUM MOTOR J210-1
(+) and GND (-)?
Y N
Run DC330 [004-003].
Is 0 VDC measured between the I/F PWB J535-B5
(+) and GND (-)?
Y N
Check the wire between the DRUM MOTOR
J210-1 and the I/F PWB J535-B5 for an open
circuit and poor contact. If no problems are
found, replace the MCU PWB.(PL13.1)
Check the wire between the DRUM MOTOR J210-1
and the I/F PWB J535-B5 for an open circuit and poor
contact.
Run DC330 [004-003].
Is 0 VDC measured between the DRUM MOTOR J210-2
(+) and GND (-)?
Y N
Run DC330 [004-003].
Is 0 VDC measured between the I/F PWB J535-B3
(+) and GND (-)?
Y N
Check the wire between the DRUM MOTOR
J210-2 and the I/F PWB J535-B3 for an open
circuit and poor contact. If no problems are
found, replace the I/F PWB.(PL9.1)
Check the wire between the DRUM MOTOR J210-2
and the I/F PWB J535-B3 for an open circuit and poor
contact.
Run DC330 [004-003].
Is the frequency between the DRUM MOTOR J210-3 (+)
and GND (-) 1 KHz to 1.3 KHz?
Y N
Run DC330 [004-003].
Is the frequency between the I/F PWB J535-B2 (+)
and GND (-) 1 KHz to 1.3 KHz?
Chapter 3 Troubleshooting
Y N
Check the wire between the DRUM MOTOR
J210-3 and the I/F PWB J535-B2 for a short
circuit to the frame. If no problems are found,
replace the I/F PWB.(PL9.1)
Check the wire between the DRUM MOTOR J210-3
and the I/F PWB J535-B2 for an open circuit and poor
contact.
Replace the DRUM MOTOR.(PL1.1)
Run DC330 [004-003].
Is +5 VDC measured between the I/F PWB J535-B1 (+) and
GND (-)?
Y N
Replace the I/F PWB.(PL9.1)
If the problem persists, replace the MCU PWB. (PL13.1)
Run DC330 [004-003].
Is +5 VDC measured between the DRUM MOTOR J210-8 (+)
and GND (-)?
Y N
Check the wire between the I/F PWB J535-B1 and the
DRUM MOTOR J210-8 for an open circuit and poor
contact.
Replace the DRUM MOTOR.(PL1.1)