Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures
6-59
6.3.11 LD Switch S101 failure
NOTES:
1. Without the diagnostic tool, skip step 2.
2. The control panel message may be: "Failure: 930 Optical System"
3. This FIP may also correct an incorrectly installed toner cartridge.
4. Try to move the toner Cartridge actuator. Try another toner cartridge.
INITIAL ANALYSIS
Inspect the following components. Are they compatible with your printer version, correctly
installed, not damaged, deformed, or contaminated?
CRU Sensor PWB MCU PWB
EP Cartridge CRU Sensor Assembly
Harness Assembly HVPS
Inspect the printer paper path. Is it clear of foreign matter, such as staples, paper clips, and
paper scraps?
Yes No
Go to Step 2. Replace the problem components.
2. CRU ACTUATOR ASSEMBLY ANALYSIS
Use Diagnostic test DG02 to check the LD Switch on the CRU Sensor.
Remove and reinstall the toner Cartridge.
Does the LD Switch S101 function correctly and increment the DG02 number each time
you remove the toner Cartridge?
Yes No
Go to Step 4. Go to Step 3.
3. Toner CARTRIDGE ANALYSIS
Does the tab on the toner cartridge actuate the LD Switch S101?
Yes No
Replace the CRU Actuator Assembly. Replace the toner cartridge.
4. CRU SENSOR PWB ANALYSIS
Disconnect the AC power plug from the back of the printer. Remove the toner cartridge.
Is there continuity (0
ΩΩ
) between P/J 15-9 and P/15-8 on the MCU PWB?
Reinstall the toner cartridge.
Is there 5 to 6 M
Ω
between P/J 15-9 and P/15-8 on the MCU PWB?
Yes No
Go to Step 5. Replace the CRU Sensor PWB.