1 - 55Chapter 1 TroubleshootingFIP2.3 ROS ASSY (PL8.1.1)Step Check Yes NoPossible causative parts:ROS ASSY (PL8.1.1)HARNESS ASSY ROS (PL8.1.2)INTERLOCK S/W 5V (PL8.1.12)HARNESS ASSY LVPS (PL12.1.1)HVPS/MCU (PL12.1.19)LVPS (PL12.1.5)1Checking the power to Laser Diode of ROS ASSYRemove COVER TOP ASSY (PL1.1.7). (RRP1.4)Disconnect P/J140 from ROS ASSY.Install EP CARTRIDGE.Close COVER OPEN (PL1.1.2).Is the voltage across J140-8 <=> J140-7, 5 VDC?Go to step 8. Go to step 2.2Checking INTERLOCK S/W 5VRemove INTERLOCK S/W 5V.Is it continuous between P/J142-1 <=> P/J142-3, whenINTERLOCK S/W 5V is pushed, and is not when released?Go to step 3.ReplaceINTERLOCK S/W5V. (RRP8.5)3Checking SWITCH I/L ASSY 5VRemove SWITCH I/L ASSY 5V.Is it continuous between P/J144-1 <=> P/J144-3, whenSWITCH I/L ASSY 5 V is pushed, and is not whenreleased?Go to step 4.Replace SWITCHI/L ASSY 5V.(RRP1.6)4Checking HARNESS ASSY LVPSDisconnect P/J141 of HARNESS ASSY LVPS.Is it conductive between P/J141-1 <=> P/J141-3 whenINTERLOCK S/W 5V and SWITCH I/L ASSY 5V arepushed simultaneously, and is not when released?Go to step 5.ReplaceHARNESS ASSYLVPS.5Checking HARNESS ASSY ROSDisconnect P/J14 from HVPS/MCU.Disconnect P/J140 fcrom ROS ASSY.Is it continuous between P/J14-1 <=> P/J140-8, whenINTERLOCK S/W 5V and SWITCH I/L ASSY 5V arepushed simultaneously, and is not when released?Go to step 6.ReplaceHARNESS ASSYROS.6Checking power to HVPS/MCURemove SHIELD PLATE LVPS. (RRP12.1)Install EP CARTRIDGE.Disconnect P/J41 from LVPS.Is the voltage across P/J41-4 <=> P/J41-3, 5 VDC?Replace LVPS.(RRP12.3). Go to step 7.7Checking HVPS/MCU for continuityDisconnect P/J14 and P/J11 from HVPS/MCU.Is P/J14-1 <=> P/J11-13 continuous normally?Go to step 8.ReplaceHVPS/MCU.(RRP12.10).8Checking HARNESS ASSY LVPS for continuityDisconnect P/J11 from HVPS/MCU.Is P/J11-13 <=> P/J41-4 continuous normally?Go to step 9.ReplaceHARNESS ASSYLVPS.
