1 - 57Chapter 1 TroubleshootingFIP2.4 FUSER ASSY (PL8.1.20)Step Check Yes NoPossible causative parts: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.Are the following continuous normally?J47-1 <=> J47-5J47-1 <=> J47-3Go 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.Are the following continuous normally?J4647B-3 <=> J47-1J4647B-2 <=> J47-3J4647B-1 <=> J47-5Replace FUSERASSY. (RRP8.8)ReplaceHARNESS 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 <=> P/J48-3, commercialvoltage?Go to step 5. Go to step 4.4 Checking AC line voltageIs the AC line voltage the commercial voltage?ReplaceHARNESS ASSYAC100V/200V(RRP12.4)Inform the clientor the 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 <=> P/J41-3,0VDC when Heater Rod lights on, and 3.3VDC when off?Go to step 7. Go to step 6.6Checking HARNESS ASSY LVPS for continuityDisconnect P/J11 from HVPS/MCU.Are the following continuous normally?P/J41-1 <=> P/J11-16P/J41-9 <=> P/J11-8P/J41-10 <=> P/J11-7P/J41-12 <=> P/J11-5P/J41-13 <=> P/J11-4ReplaceHVPS/MCU.(RRP12.10)ReplaceHARNESS ASSYLVPS.
