Xerox WC5545F, Service Manual

Page: 466 / 2320

August 2007
2-274
WorkCentre 5687 Family
10-315, 10-320, 10-321, 10-323, 10-340, 10-350, 10-360,
Status Indicator RAPs
10-315, 10-320, 10-321, 10-323, 10-340, 10-350, 10-360, 10-
380 Fuser Over Temperature RAP
10-315 The difference between 2 consecutive thermistor readings exceeds a given value.
10-320 During standby or run mode, the thermistor reading is not within the target temperature
range.
10-321 Over temperature during standby mode, the thermistor reading is not within the target
temperature range
10-323 Over temperature during run mode, the thermistor reading is not within the target tem-
perature range.
10-340 Fuser temperature sensor A reading monitors above its normal operating temperature.
10-350 The hardware comparator detects a fuser reading greater than 240 degrees centigrade
or a short circuit thermistor.
10-360 Fuser temperature sensor B reading is greater than the normal operating temperature.
10-380 The fuser delta value between the temperature sensors A and B is to high.
WARNING
Do not touch the fuser while it is hot.
Initial Actions
• If a number of 10-321 fault codes, are in the fault history. Check if the customer has been
running transparency jobs of nominal papers at card stock settings. This fault can be gen-
erated when the temperature changes between the standby and run. This is a normal
function of the machine and should not effect the customer operation.
• Check that the fuser temperature NVM settings in dC131, are set to default. Refer to NVM
location 10-028 though to 10-061 and location 08-282 through to 08-295. Ensure that the
values are set to the default level. If the values are not at default then, 10-320, 10-321,
10-340 and 10-360 may appear in the fault log. Use the machine resident diskette to
restore the NVM values to default.
• Check the fuser module connector, Figure 1.
• Check the fuser connector assembly, Figure 2.
Procedure
Switch off the machine, then switch on the machine, GP 14. The display shows Ready to
Copy.
Y
N
Refer to Figure 3. Go to Flag 1. The voltage at the temperature sensors A and B should
be 2.9 volts when the sensors are cold. In standby mode the voltage should be 0.78 to
0.98 volts. Refer to:
• P/J35, IOT PWB.
• 01D +3.3 V Distribution RAP.
• 01B 0V Distribution RAP
Before new components are installed, use the machine resident diskette to restore the
NVM values to default.
Install new components as necessary:
• Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL
1.10 Item 2.
• LVPS and base module, PL 1.10 Item 3.
• Fuser Module, (32-55 ppm) PL 10.8 Item 1, (65-87 ppm) PL 10.10 Item 1.
Perform SCP 6 Final Actions.
Figure 1 Component location
Pin 8
Pin 6
Pin 5
Pin 4
Pin 3
Pin 2
Pin 7
Pin 9
Pin 10
Pin 1
CRUM
Web drive
gear
Fuser drive
gear
PJ100
A
A