Xerox WorkCentre Pro 423 Service Manual page 163

2.3.5 Other Problem FIP
WARNING
Switch off the machine and disconnect the power
cord from the customer's outlet while performing
tasks that do not need electricity. Electricity can
cause death or injury.
AC POWER FIP (BSD 1.1 1.2)
WARNING
Switch off the machine and disconnect the power
cord.
Perform the Power Outlet Check. Is the voltage correct?
Y N
Check the circuit breaker at the customer.
Check the power cord for an open wire. The power cord is
normal.
Y N
Replace the power cord.(PL7.1)
Connect the power cord to the outlet and the machine. Is the
voltage 100 VAC between the CIRCUIT BREAKER FS243(+)
and FS244(-)?
Y N
Replace the CIRCUIT BREAKER. (PL7.1)
POWER UNIT FS11(+)FS12(-) Is the voltage 100 VAC ?
Y N
Check between the CIRCUIT BREAKER and POWER
UNIT for an open wire or poor contact.
Is a CHOKE COIL or cheat connector installed to the POWER
UNIT P5? (100V model)
Y N
Install a CHOKE COIL or cheat connector.
Is the voltage 100 VAC between the POWER UNIT J8-3(+) and
J8-6(-)?
Y N
Replace the POWER UNIT. (PL7.1)
Turn on the MAIN POWER SW. Is the voltage 100 VAC
between the POWER UNIT J8-4(+) and J8-1(-)?
Y N
A B
WorkCentre Pro 423/428
A B
Is the voltage 100 VAC between the MAIN POWER SW
J620-4(+) and J620-1(-)?
Y N
Is the voltage 100 VAC between the MAIN POWER
SW J620-6(+) and J620-3(-)?
Y N
Check between the MAIN POWER SW and
POWER UNIT for an open wire or poor contact.
Replace the MAIN POWER SW. (PL2.3)
Check between the MAIN POWER SW and POWER UNIT
for an open wire or poor contact.
Replace the POWER UNIT. (PL7.1)
03/02
2-131
+24VDC POWER FIP (BSD 1.1 1.6)
Is the voltage +24 VDC between the MCU/SW PWB J400-1(+)
and GND(-)?
Y N
Is +24DC WIRE normal (no short circuit with theFRAME)?
Y N
Repair the short circuit.
Is the voltage +24 VDC between the POWER UNIT
J521-1(+) and GND(-)?
Y N
Is the voltage +5 VDC between the POWER UNIT
J523-1(+) and GND(-)?
Y N
Is the voltage +5 VDC between the MCU/SW
PWB J403-4(+) and GND(-)?
Y N
Is the voltage +5 VDC between the
MCU/PWB J400-10(+) and GND(-)?
Y N
Is the voltage +5 VDC between the
Power Unit J521-5(+) and GND(-)?
Y N
Is the voltage 100 VAC between
the POWER UNIT J8-4(+) and
J8-1(-)?
Y N
Perform AC POWER FIP.
Perform +5VDC POWER FIP.
Check between the POWER UNIT
J521-5 and MCU/PWB J400-10 for
an open wire or poor contact.
Replace the POWER UNIT. (PL7.1)
Check between the POWER UNIT J523-1 and
MCU/SW PWB J403-4 for an open wire or
poor contact.
Replace the POWER UNIT. (PL7.1)
Check between the POWER UNIT and MCU/SW PWB for
an open wire or poor contact.
Check between the MCU/SW PWB and the corresponding part
for an open wire or poor contact.
Level 2 Troubleshooting
CHAPTER 2 TROUBLESHOOTING