1 – 93Chapter 1 TroubleshootingFIP3.12 S/W REAR COVERStep Check Yes NoPossible causes:S/W REAR COVER (PL23.1.18)HARNESS ASSY REAR COVER (PL23.1.29)PWBA OCT (PL23.1.22)HARNESS ASSY OCT2 (PL23.1.25)HVPS/MCU (PL12.1.19)LVPS (PL12.1.5)HARNESS ASSY OCT1 (PL12.1.26)1Checking S/W REAR COVER for continuity (1)Remove S/W REAR COVER.Is J740-2 and J740-1 continuous, when S/W REARCOVER is pushed, and cut when released?Go to step 2. Replace S/WREAR COVER.2Checking HARNESS ASSY REAR COVER for continu-ityRemove HARNESS ASSY REAR COVER.Is there continuity between J74 and J740?Go to step 3. Replace S/WREAR COVER.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 S/W REAR COVER (2)Remove EP CARTRIDGE.Is the voltage across P/J30-4(+) and P/J30-3(-) onHVPS/MCU, 3.3 VDC?Go to FIP3.8PWBA OCT. Go to step 6.6Checking HVPS/MCU for continuityDisconnect P/J30 from HVPS/MCU.Is there continuity between P30-4 and P11-16?Go to FIP1.24LVPS.Replace HVPS/MCU. (RRP12.10)
