Xerox WorkCentre Pro 423 Service Manual page 37

Status Status Description
Code
U3-1 ROS failure ROS CONTROL ASIC
(4131) failure
U3-2 ROS failure Abnormal power adjustment
(4132) value to laser diode when
Laser Diode Power
adjustment is permitted
ROS failure
U3-3 Abnormal power adjustment
(4133) value to the laser diode
when the diode is forced to
go on
U3-4 ROS failure Abnormal power adjustment
(4134) value to the laser diode at
SOS sample hold
U3-5 ROS failure ROS not ready within 20
(4135) seconds of warm-up
U3-6 ROS failure Abnormal SOS interval after
(4136) ROS gets ready
FUSER failure FUSER ON TIME Fail
U4-1
(4141)
Warm-up has not completed
in 60 sec.
U4-2 FUSER failure OVER HEAT Fail
(4142)
230 deg C or more detected
continuously in more than
500 msec.
U4-3 FUSER failure An open circuit of Fuser
(4143) Thermistor has been
detected.
U4-4 FUSER failure LOW TEMPERATURE Fail
(4144)
122 deg C or less detected
continuously in more than
500 msec.
U4-5 FUSER failure Fuser lamp lit for 10 or more
(4145) continuous seconds in
standby state
U4-6 FUSER failure Temperature rise not over 5
(4146) degrees continuous three
times in 5 seconds during
warm-up
WorkCentre Pro 423/428
Corrective Ref.
Action BSD
POWER 6.3
OFF/ON
POWER 6.3
OFF/ON
POWER 6.3
OFF/ON
POWER
6.3
OFF/ON
POWER
6.3
OFF/ON
POWER
6.3
OFF/ON
POWER 10.2
OFF/ON
POWER
10.2
OFF/ON
Clear NVM
POWER
10.2
OFF/ON
POWER
10.2
OFF/ON
POWER
10.2
OFF/ON
POWER
10.2
OFF/ON
03/02
2-5
Status Status Description
Code
U6-01 Memory error at MCU/SW PWB Memory
(4061) Power ON Error
U6-02 Memory error at MCU/SW PWB Memory
(4062) Power ON Error
U6-03 Memory error at MCU/SW PWB Memory
(4063) Power ON Error
U6-04 Memory error at MCU/SW PWB Memory
(4064) Power ON Error
U6-41 Memory error at IIT/IPS PWB ROM CHECK
(4461) Power ON SUM Error
U6-42 Memory error at IIT/IPS PWB RAM R/W
(4462) Power ON Error
U6-43 Memory error at EEPROM data damaged
(4463) Power ON
U6-44 Memory error at EEPROM R/W Error
(4464) Power ON
U6-05 Memory error at Illegal CPM data
(4065) Power ON
U6-82 Memory error at Switcher D-PORT RAM
(4862) Power ON R/W Error
U6-95 Memory error at Wrong electronic billing
(4965) Power ON counter value
U7-01 Inter-system Initial communication check
Communication error between MF system
(4071)
Fail and MCU/SW
U7-02 Inter-system Framing/Overrun/Parity
Communication error between MF SYS and
(4072)
Fail MCU/SW.
U7-03 Inter-system BCC error between MF SYS
Communication and MCU/SW.
(4073)
Fail
U7-04 Inter-system No Communication between
Communication MF SYS and MCU/SW.
(4074 )
Fail
Corrective Ref.
Action BSD
POWER
3.1C
OFF/ON
POWER
3.1C
OFF/ON
POWER
3.1C
OFF/ON
POWER
3.1C
OFF/ON
POWER
3.1A
OFF/ON
POWER 3.1A
OFF/ON
POWER 3.1A,
OFF/ON
3.1C
Initialize NVM
POWER
3.1A,
OFF/ON
3.3
Initialize NVM
Replace 3.1C
MCU/SW PWB
Replace 3.1A
MCU/SW PWB
Rewrite NVM. 3.1A,3.
1C,3.3
POWER 19.2
OFF/ON Check
connectors.
POWER 19.2
OFF/ON
POWER 19.2
OFF/ON
POWER 19.2
OFF/ON
2.3 Level 2 Troubleshooting
CHAPTER 2 TROUBLESHOOTING