Description: FGATE ON error The FGATE signal did not assert within 1 second. (The BCU generates the FGATE signal and sends it to the LD unit when the registration sensor switches on.)
Causes: Defective GAVD and PCI bridge ASIC. Defective BCU. Defective controller board. Defective harness between BCU and LDB.
Remedy: • Turn the Power Switch Off and On. • Connect the harness properly. • Replace the harness. • Replace LD unit. • Replace the controller board.
Code: 231
Description: FGATE OFF error The FGATE signal did not go off within 10 seconds after the machine finished writing. (The BCU generates the FGATE signal and sends it to the LD unit when the registration sensor switches on.)
Causes: Defective GAVD and PCI bridge ASIC
Remedy: • Turn the Power Switch Off and On. • Replace the controller board.
Code: 240
Description: LD error The IPU detected a problem at the LD unit.
Causes: Defective LD unit. Disconnect harness. Disconnect LD Driver.
Remedy: • Connect the harness properly. • Replace the LD unit.
Code: 312
Description: Charge roller current leak The PWM duty output exceeded 50% for longer than 200 ms, indicating a leak in the charge roller current.fective BCU.
Causes: Cartridge (charge roller) defective. High voltage supply board defective. Disconnect harness.
Remedy: • Turn the Power Switch Off and On. • Connect the harness properly. • Replace the AIO unit. • Replace the High voltage power supply board.
Code: 320
Description: Development Bias leak The PWM duty output exceeded 50% for longer than 200 ms, indicating a leak in the charge roller current.
Causes: Bias applying section leak. High voltage supply board defective. Disconnect harness. Development Bias CN loose
Remedy: • Connect the harnesses properly. • Replace the AIO. • Replace High voltage power supply board.
Code: 440
Description: Primary Transfer PP output leak The PWM duty output exceeded 50% for longer than 200 ms, indicating a leak in the charge roller current.
Causes: High voltage supply board defective. Disconnect harness. Development Bias CN loose
Remedy: • Connect the harnesses properly. • Replace the AIO. • Replace High voltage power supply board.