Xerox 8825 Service Manual

01/02
2-7
8825/8830 Printer
LL-43 Fuser Over Temperature RAP
Status Indicator RAPs
LL-43 Fuser Over Temperature RAP
NOTE: Refer to BSD 10.1 while using this RAP.
WARNING
Dangerous Voltage
LL-43 is displayed when the logic detects that there is a problem with the Fuser temperature
and an overtemperature condition has caused the Thermal Fuse, A23F1, to open.
Initial Actions
• Ensure that the following connectors are correctly seated:
1. Driver PWB A2J213 / A2P213
2. Driver PWB A2J201 / A2P201
3. Xerographics Module A23J2 / A23P2
4. Thermistor Pad Assembly J5 / A23P5
• Ensure that both cooling fans are working. If not, go to BSD 1.3 to repair the cooling fans
circuit.
• Ensure that all interlocks are closed.
Procedure
Connect the (+) meter lead to the Driver PWB A2P201-1 and the (-) meter lead to ground.
There is +26 VDC present.
YN
Check continuity through the Overtemperature Fuse, A23F1, as follows:
1. Disconnect the BLU and GRY wires from the fuse.
2. Set the meter to measure continuity.
3. Connect the meter across the fuse terminals.
The fuse has continuity
YN
Switch off the printer and disconnect the Power Cord. Replace the Thermal Fuse,
A23F1, PL 10.4.
Perform the following steps to determine the cause for the fuse to open:
1. Disconnect the BLU and WHT wires from the Fuser Triac, A1Q1.
2. Set the meter to measure 2K ohms. Measure the resistance across the Fuser
Triac connections from which the wires were removed. If the resistance is not
infinite, replace the Fuser Triac, A1Q1, PL 1.2A.
3. Measure the resistance from each of the Fuser Triac connections from which
the wires were removed to ground. If the resistance is not infinite, replace the
Fuser Triac, A23Q1, PL 1.2A.
YN
Connect the (+) meter lead to the Driver PWB, A2P201-3 and the (-) meter lead to
ground. There is +26 VDC present.
YN
Replace the Driver PWB, A2, PL 1.1A.
Check the BLU and GRY wires between the Thermal Fuse. A23F1, and the Driver PWB,
A2 for continuity. The wires have continuity.
YN
Repair the wires.
Disconnect A23P5 from the Thermistor Pad Assembly JS. Set the meter to measure
200K ohms. Connect the (+) meter lead to the Thermistor Pad Assembly J5-1 and the (-)
meter lead to J5-2. The resistance is less that 200K ohms.
YN
Replace the Thermistor Pad Assembly PL 10.4.
Check the YEL and GRN wires between the Fuser Thermistor and the Main PWB, A1 for
continuity. The wires have continuity.
YN
Repair the wires.
Replace the Driver PWB, A2, PL 1.1A. If the problem persists, replace the Main PWB A1,
PL 1.1A.
Connect the (+) meter lead to the Driver PWB, A2P213-3 and the (-) meter lead to ground.
Enter Diagnostic code [1009] to turn on the Fuser Power Relay, A1K1. The voltage changes
from +26 VDC to less than 1 VDC when the Fuser Power Relay is turned on.
YN
Check the BRN and ORN wires between the Fuser Power Relay, A1K1, and the Driver
PWB, A2 for continuity. The wires have continuity.
YN
Repair the wires.
Replace the Driver PWB, A2, PL 1.1A. If the problem persists, replace the Main PWB, A1
PL 1.1A.
Replace the Fuser Power Relay, A1K1, PL 1.2A.
A
A
B
B

Xerox 8825 Specifications

General

Brand	Xerox
Model	8825
Category	Printer
Language	English