1 – 45Chapter 1 TroubleshootingFIP1.27 FUSER ASSYStep Check Yes NoPossible causes:FUSER ASSY (PL8.1.20)HVPS/MCU (PL12.1.19)INTERLOCK S/W 24V (PL8.1.11)HARNESS ASSY FUSER 100V/200V (PL8.1.17)HARNESS ASSY AC100V/200V (PL12.1.8)LVPS (PL12.1.5)HARNESS ASSY LVPS (PL12.1.1)1Checking Heater circuit for continuityRemove SHIELD PLATE LVPS. (RRP12.1)Disconnect P/J47 from LVPS.Is there continuity betweenJ47-1 and J47-5?J47-1 and J47-3?Go to step 3. Go to step 2.2Checking HARNESS ASSY FUSER for continuityRemove FUSER ASSY. (RRP8.8)Warning; Start the operation after the FUSER ASSYhave cooled down.Is there continuity betweenJ4647B-3 and J47-1?J4647B-2 and J47-3?J4647B-1 and J47-5?Replace FUSERASSY. (RRP8.8)Replace HAR-NESS ASSYFUSER. (RRP8.7)3Checking Fuser power source voltageDisconnect P/J48 from LVPS.Remove EP CARTRIDGE.Turn the power to ON.Is the voltage across P/J48-1 and P/J48-3, commercialvoltage?Go to step 5. Go to step 4.4 Checking AC line voltageIs the AC line voltage the commercial voltage?Replace HAR-NESS ASSYAC100V/200V(RRP12.4)Inform the client orthe electrician.5Checking Heater Rod ON signal voltageMake sure FUSER ASSY is cooled down.Make sure that EP CARTRIDGE is removed.Is the voltage across P/J41-13(+) and P/J41-12(+) andP/J41-3(-), 0VDC when Heater Rod lights on, and3.3VDC when off?Go to step 7. Go to step 6.6Checking HARNESS ASSY LVPS for continuityDisconnect P/J11 from HVPS/MCU.Is there continuity betweenP/J41-1 and P/J11-16?P/J41-9 and P/J11-8?P/J41-10 and P/J11-7?P/J41-12 and P/J11-5?P/J41-13 and P/J11-4?Replace HVPS/MCU.(RRP12.10)Replace HAR-NESS ASSY LVPS.
