Xerox 8850 Service Manual page 26

Table 1 Status Code Entry Chart
Status Description
Code
LL-72 -Fuser Controller Faults - Line
No RAP voltage time out. This may occur
if there are large variations in line
current drawn during Fuser Cali-
bration.
-Fuser Relay (K3) is not closing or -
-+24 VDC is missing
-ACH input is too low or too high
- To reset: switch the Main Power
Switch off, then on,.
LL-73 - Fuser Warm-up Fault
LL-74 - Edge Heat Rod (HR1) does not
No RAP warm up.
- Unstable Heat Rod current.
To reset: switch off, then on, the
Main Power Switch.
LL-7A Fuser Fault
No RAP Thermal Fuse (A27F1) is open due
to severe over temperature of the
Fuser Heat Roll.
To reset: Repair the cause of the
over temperature. Switch off the
Main Power Switch.Replace the
Thermal Fuse. Switch on the Main
Power Switch.
LL-7B Fuser Controller PWB - Cooling
No RAP Fan failure.
LL-7D CRC Check Failure
No RAP
LL-7E Fuser Controller - Firmware Fault
No RAP Fuser locked in calibration mode
due to a firmware fault.
To reset: switch off, then on, the
Main Power Switch.
Service Call Procedures
Status Code Entry Chart
Components BSD
Ref
• Check that the Line Ser- BSD PL 1.1
vice (ADJ 3.2) is set to 10.1 PL
the correct amperage. 10.2
• Main PWB (A3)
• Low voltage Power Sup-
ply
• Replace the AC Module
Assembly (A1)
• (HR1) or associated wir- BSD PL 1.1
ing has an intermittent 10.1
or open circuit.
• AC Module Assembly
(A1).
If problem persists, escalate
the service call
• Check that the Ther- BSD PL
mistors (RT2) and (RT3) 10.1 10.2
are touching the Heat PL 1.1
Roll, clean/replace the
Thermistors
• Check/Adjust the Fusing
Temperature (ADJ 10.1)
• Heat Rod Controller
failed.
• Replace the Thermal
Fuse (A27F1)
• AC Module Assembly
(A1).
AC Power Module (A1) BSD PL 1.1
1.1
BSD
10.1
Replace the AC Module BSD PL 1.1
Assembly (A1). 10.1
Replace the AC Module BSD PL 1.1
Assembly (A1). 10.1
PL Status Description
Ref Code
LL-7F Fuser Fault - Over temperature.
No RAP The firmware has detected a fuser
over temperature condition.
To reset: switch off, then on, the
Main Power Switch.
LL-81 Line input not set to correct cur-
rent.
LL-83 Fuser Control PWB failure
No RAP
LL-89 This is a Firmware problem
No RAP Press power off (0) then power on
(1). If problem persists, reload the
firmware.
03/2003
1-10
Table 1 Status Code Entry Chart
Components
• Ensure that the ther-
mistors are wired cor-
rectly and not reversed
(edge and center ther-
mistors swapped).
• Ensure good mechani-
cal/electrical connec-
tions for the
Thermistors.
• Check that the Ther-
mistors (RT2) and (RT3)
are touching the Heat
Roll, clean/replace the
Thermistors.
• Check/Adjust the Fusing
Temperature (ADJ 10.1)
• Line Current Limit (ADJ
3.2)- Country Configura-
tion is not correct for the
electrical voltage used.
Current limit set point is
too low. Check the
adjustment.
• Thermistor (RT2) or
(RT3) does not touch
the Fuser Heat Roll.
• Heat Rod (HR1), or wir-
ing, has an open circuit.
• Clean/Replace the
Thermistors (RT2) or
(RT3)
• Replace the AC Module
Assembly (A1).
• Line voltage time-out,
unstable Heat Rod Cur-
rent
• AC Module Assembly
(A1)
• Main PWB (A3)
BSD PL
Ref Ref
BSD PL
10.1 10.1
BSD PL
10.1 10.2
PL
10.5
PL 1.1
BSD PL 1.2
10.1 PL 1.1
8850/ 510DP