Fan Lock Failure - Panasonic DP-C321 Service Handbook

Y N
Check the +24 VDC circuit to the AC
DRIVE PWB J590-1 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)
Is 0 VDC measured between the AC DRIVE
PWB J590-2 (+) and GND (-)?
Y N
Is 0 VDC measured between the MCU
PWB J404-8 (+) and GND (-)?
Y N
Check the wire between the AC
DRIVE PWB J590-2 and the MCU
PWB J404-8 for an open circuit and
poor contact. If no problems are
found, replace the MCU PWB.
(PL13.1)
Check the wire between the AC DRIVE
PWB J590-2 and the MCU PWB J404-8 for
an open circuit and poor contact.
Replace the AC DRIVE PWB. (PL9.2)
Check the wires between the AC DRIVE PWB FS47
and the FUSER ASSY J600-3 and between the AC
DRIVE PWB FS48 and the FUSER ASSY J600-12
for an open circuit and poor contact.
Check the wire between the AC DRIVE PWB J590-3 and
the MCU PWB J404-7 for an open circuit and poor
contact.
Check the wire for a short circuit to the frame. If no problems
are found, replace the MCU PWB. (PL13.1)
3-71

010-398 FAN LOCK FAILURE

Description A failure of the FUSER FAN/LVPS FAN/REAR
FAN
The system detected a failure of the FUSER FAN,
LVPS FAN, or REAR FAN before servicing.
BSD on : CH1.2 CH9.30 CH10.2 CH10.8
Procedure (for FUSER FAN)
The procedures for the LVPS and REAR FAN are described
after this procedure.
Run DC330 [004-050].
Is the FUSER FAN revolving at high speed?
Y N
Is +24 VDC measured between the FUSER FAN J222-4
(+) and GND (-)?
Y N
Check the +24DC circuit to FUSER FAN J222-4 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)
Is +24 VDC measured between the FUSER FAN J222-4
(+) and J222-1 (-)?
Y N
Check the DC COM circuit to the FUSER FAN J222-
1 by referring to Chapter 4 Wiring Data.
(WN4.3.17 +24 VRET-1) (WN4.3.18 +24 VRET-2)
(WN4.3.19 +24 VRET-3) (WN4.3.20 +24 VRET-4)
Run DC330 [004-050].
Is 0 VDC measured between the FUSER FAN J222-3 (+)
and GND (-)?
Y N
Run DC330 [004-050].
Is 0 VDC measured between the MCU PWB J407-15
(+) and GND (-)?
Y N
Check the wire between the FUSER FAN J222-3
and the MCU PWB J407-15 for an open circuit
and poor contact. If no problems are found,
replace the MCU PWB. (PL13.1)
Check the wire between the FUSER FAN J222-3 and
the MCU PWB J407-15 for an open circuit and poor
contact.
Replace the FUSER FAN. (PL8.1)
Run DC330 [004-050].
Is +3.3 VDC measured between the FUSER FAN J222-2 (+)
and GND (-)?
Y N
Run DC330 [004-050].
Is +3.3 VDC measured between the MCU PWB J407-16
(+) and GND (-)?
Y N
Replace the MCU PWB. (PL13.1)
Check the wire between the FUSER FAN J222-2 and the
MCU PWB J407-16 for an open circuit and poor contact.
Replace the FUSER FAN. (PL8.1)
Procedure (for LVPS FAN)
The procedures for the REAR FAN are described after this
procedure.
Run DC330 [004-050].
Is the LVPS FAN revolving at high speed?
Y N
Is +24 VDC measured between the LVPS FAN J214-4 (+)
and GND (-)?
Y N
Check the +24DC circuit to LVPS FAN J214-4 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)
Chapter 3 Troubleshooting