Brother International HL-4000CN Service Manual - Page 232
Brother International HL-4000CN Manual
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Cyan Toner Cartridge Detached FIP Step Check Initial setting Check the following for evidence of fault. Cartridge replacing condition Toner cartridge switch ASSY (C) replacing condition Toner cartridge switch ASSY (C) actuator replacing condition Toner cartridge switch ASSY (C) connector replacing condition Checking toner cartridge switch ASSY Does toner cartridge switch ASSY function 2 normally? Using diagnostic tool, check by digital input test. Checking drive PWB for signal Is P/J51-29PINP/J51-30PIN OVDC? Checking toner cartridge switch ASSY (C) 4 for signal Is P/J433-2PINP/J433-1PIN OVDC? Checking toner cartridge switch ASSY (C) for continuity 5 Is P433-2PINP433-1PIN of toner cartridge switch ASSY (C) continuous normall ? Checking harness ASSY TNR for 6 continuity Is J51J433 continuous normall ? Checking drive WB for signal 7 Is P/J42-6 P P/J42-14PIN OVDC? 8 Checking harness ASSY DRV2 for 9 continuity Is J12J42 continuous normally? Remedy Yes No Replace the parts concerned Go to step [2] Replace MCU and HVPS PWB Go to step [3] Go to step [7] Go to step [4] Go to step [6] Go to step [5] Go to step [6] Replace toner cartridge switch ASSY (C) Go to step [7] Go to step [8] Checking MCU and HVPS PWB for signal Is P/J1225PINP/1217PIN of MCU and HVPS PWB OVDC? Replace MCU and HVPS PWB Replace harness ASSY TNR Replace drive PWB Replace MCU and HVPS PWB go to step [9] Replace harness ASSY DRV2 V-27