Ll-41/Ll-45 Fuser Warm-Up Fault Rap - Xerox 8825 Service Manual

LL-41/LL-45 Fuser Warm-up Fault RAP

NOTE: Go to BSD 10.1 while using this RAP.
This RAP is used when the Fuser does not warm up when the control logic attempts to
increase the heat.
LL-41 is displayed when the Fuser heat does not increase to 110º F (43º C) within one minute.
LL-45 is displayed when the Fuser temperature is greater than 110º F (43º C) but does not
reach the setpoint temperature within the specified time period.
Initial Actions
• Ensure that the following connectors are correctly seated:
1. Thermistor Assembly RT1J5 / A23P5
2. Thermal Fuse A23XF1
3. Xerographic Module A23J2 / A23P2
4. Fuser Heat Rod A23HR1P2 (blue wire)
5. Fuser Heat Rod A23HR1P1 (brown wire)
• Ensure that the correct Fuser Heat Rod is installed.
• Check the wall outlet for correct line voltage.
WARNING
Dangerous Voltage
Procedure
NOTE: After entering the code [1004], the Fuser Power Relay, A1K1, and the Fuser Power
LED, (A2CR15 without Tag 25 or A2CR31 with Tag 25) on the Driver PWB, are energized for
approximately five minutes.
Enter DIAGNOSTICS (General Procedures). Enter [1004] to test the operation of the Fuser.
After 10 seconds, the Fuser Heat Rod is still on.
Y N
Switch off the printer and disconnect the power cord. Measure the resistance of the Heat
Rod as follows: Disconnect A23P1/A23J1. Connect the meter leads to A23J1-1 and
A23J1-3. The resistance is less than 30 Ohms.
Y N
Check the wiring between A23J1 and the Fuser Heat Rod (HR1). The wires have
continuity
Y N
Repair the wires
Replace the Fuser Heat Rod, HR1 (
A B
8825/8830 Printer
PL 10.2)
A B
Check for AC power from the Fuser Power Relay as follows: Reconnect A23P1/A23J1.
Set the meter to read AC voltage and connect the meter leads to A1K1-4 and A1K1-8.
Cheat the front door interlock. Connect the Power Cord and switch on the printer. Wait 10
seconds. AC power is present.
Y N
Set the meter to read 26 VDC and connect the (+) meter lead to A1K1-1 and the (-)
meter lead to A1K1-0. Switch off, then switch on, the printer. 26 VDC is present.
Y N
Check the Fuser Power Relay On signal from the Driver PWB, A2, as follows:
Connect the (+) meter lead to A2J213-1 and the (-) meter lead to A2J213-3.
26 VDC is present.
Y N
PL 1.1A Replace the Driver PWB, A2.
Check and repair the wiring between the Driver PWB, A1, and the Fuser Power
Relay, A1K1.
Replace the Fuser Power Relay, A1K1,
Switch off the printer and disconnect the power cord. Check the following wires for conti-
nuity.
From
A1K1-8
A1Q1MT2-A
A1K1-4
The wires have continuity.
Y N
Repair the wires
Set the meter to read +2 VDC. Connect the (+) lead to A1Q1-G (BRN wire) and the (-)
lead to A1Q1-MT1 (WHT wires). Reconnect the Power Cord and switch on the printer.
Wait 10 seconds. Set the voltage meter to Peak Hold. The Peak Voltage exceeds 0.9
VDC.
Y N
Connect the (+) meter lead to A2P213-11 and leave the (-) meter lead connected to
A1Q1-MTI. Pulses are present.
Y N
Replace the Driver PWB, A2,
The machine has TAG 50
Y N
Repair the wire between terminal G and A1Q1 and A2P213-11 (wire no. 31)
A C D
01/02
LL-41/LL-45 Fuser Warm-up Fault RAP
2-5
PL 1.2A.
Table 1
To Color
A1Q1MT1-A WHT
A23P1-1 BLU
A23P1-3 BLK & BRN
PL 1.1A
(50Hz only) installed.
Status Indicator RAPs