1 – 95Chapter 1 TroubleshootingFIP3.14 Sensor Full Stack (On PWBA OCT)Step Check Yes NoPossible causes:Sensor Full Stack (Mounted on PWBA OCT)ACTUATOR FULL STACK (PL23.1.15)PWBA OCT (PL23.1.22)HARNESS ASSY OCT2 (PL23.1.25)HVPS/MCU (PL12.1.19)HARNESS ASSY OCT1 (PL12.1.26)1Checking ACTUATOR FULL STACK for operationRemove Option OCT. (RRP23.1)Move ACTUATOR FULL STACK with a finger.Does ACTUATOR FULL STACK operate smoothly?Does the flag go into the sensor detecting point whenthere is no paper, and out of the detecting point whenthe paper is set?With tool Go tostep 2. Withouttool Go to step 3.Replace ACTUA-TOR FULL STACK.2Checking Sensor Full Stack mounted on PWBA OCT(1)Remove EP CARTRIDGE.Install Option OCT. (RRP23.1)Move ACTUATOR FULL STACK up and down.Does the number increase one by one, every timeACTUATOR FULL STACK operates?Check using Chapter 2 Diagnostic [Sensor/SwitchCheck].Replace HVPS/MCU.(RRP12.10)Go to step 3.3Checking HARNESS ASSY OCT2 for continuityDisconnect P/J70 from PWBA OCT.Remove HARNESS ASSY OCT2.Is there continuity between J70 and J3070?Go to step 4.Replace HAR-NESS ASSYOCT2.4Checking HARNESS ASSY OCT1 for continuityRemove HARNESS ASSY OCT1.Is there continuity between J30 and J3070?Go to step 5.Replace HAR-NESS ASSYOCT1.5Checking Sensor Full Stack mounted on PWBA OCT(2)Replace PWBA OCT. (RRP23.7)Is the problem cleared?End of work Replace HVPS/MCU. (RRP12.10)
