Image Quality Sensor (No Pattern Level) - Toshiba FC-22 Manual

CE2 Image quality sensor (no pattern level)
1. Check that the transfer belt unit is fully raised.
2. Check that the transfer belt unit is fully mounted inward.
3. Check for any abnormal stain, large scar or fray on the transfer belt surface.
4. Check that the drum and transfer belt are rotating. If abnormal, repair any mechanical prob-
lem.
Is any of the connectors J113, J114, J115,J118 or J122 on the LGC board disconnected?
Is the connector J168 on the IMC board disconnected?
Is the harness between the LGC board and the IMC board open-circuited?
Is the connector of the image quality sensor disconnected or stained?
Is the harness between the LGC board and the image quality sensor open-circuited?
Is the main high-voltage transformer connector disconnected?
Is the harness between the LGC board and the main high-voltage transformer open-circuited?
Is the transfer transformer connector disconnected?
Is the harness between the LGC board and the transfer transformer open-circuited?
Is any of the high-voltage contact points of the transfer belt unit in faulty contact? Is any contact
points stained?
Is the harness of the main high-voltage transformer or the transfer transformer disconnected or
open-circuited?
YES
NO
Is LED (D21) on the LGC board lit? Is the output voltage from the 12V-power supply normal?
YES
NO
1. Replace the image quality sensor.
2. Replace the LGC board.
3. Replace the IMC board.
FC-22 TROUBLESHOOTING
Reconnect the connector. Replace the harness. Do necessary cleaning.
Repair the high-voltage contact point.
Check the power supply system, and replace the switching power supply.
4 - 46 January 2000 © TOSHIBA TEC