01/022-78825/8830 Printer LL-43 Fuser Over Temperature RAPStatus Indicator RAPsLL-43 Fuser Over Temperature RAPNOTE: Refer to BSD 10.1 while using this RAP.WARNINGDangerous VoltageLL-43 is displayed when the logic detects that there is a problem with the Fuser temperatureand 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 / A2P2132. Driver PWB A2J201 / A2P2013. Xerographics Module A23J2 / A23P24. Thermistor Pad Assembly J5 / A23P5• Ensure that both cooling fans are working. If not, go to BSD 1.3 to repair the cooling fanscircuit.• Ensure that all interlocks are closed.ProcedureConnect the (+) meter lead to the Driver PWB A2P201-1 and the (-) meter lead to ground.There is +26 VDC present.Y NCheck 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 continuityY NSwitch 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 FuserTriac connections from which the wires were removed. If the resistance is notinfinite, replace the Fuser Triac, A1Q1, PL 1.2A.3. Measure the resistance from each of the Fuser Triac connections from whichthe wires were removed to ground. If the resistance is not infinite, replace theFuser Triac, A23Q1, PL 1.2A.Y NConnect the (+) meter lead to the Driver PWB, A2P201-3 and the (-) meter lead toground. There is +26 VDC present.Y NReplace 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.Y NRepair the wires.Disconnect A23P5 from the Thermistor Pad Assembly JS. Set the meter to measure200K 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.Y NReplace the Thermistor Pad Assembly PL 10.4.Check the YEL and GRN wires between the Fuser Thermistor and the Main PWB, A1 forcontinuity. The wires have continuity.Y NRepair 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 changesfrom +26 VDC to less than 1 VDC when the Fuser Power Relay is turned on.Y NCheck the BRN and ORN wires between the Fuser Power Relay, A1K1, and the DriverPWB, A2 for continuity. The wires have continuity.Y NRepair the wires.Replace the Driver PWB, A2, PL 1.1A. If the problem persists, replace the Main PWB, A1PL 1.1A.Replace the Fuser Power Relay, A1K1, PL 1.2A.AABB
