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1. Check if the conductor pattern on the LGC board is short circuited or open circuited.
2. Check if the units with high-voltage (developer unit, transfer belt unit, 2nd transfer roller
unit) are securely grounded.
3. Check if the bias supply joints of the units with high-voltage are securely connected or they
are not stained.
4. Check if the plate in the paper transport system is securely grounded.
5. Check if the equipment is grounded.
6. Check if the laser unit cooling fan is stopped.
7. Check if the suction area of the laser unit cooling fan is plugged up.
8. Replace the laser optical unit.
9. Replace the LGC board.
[CA20] H-sync detection error
Is the harness between the LGC board (CN356) and the LDR board open circuited, broken or
disconnected?
Are the relay connectors (J505) disconnected or almost disconnected? (Are they locked with
the latches?)
Is the harness between the LGC board (CN355) and the SNS board open circuited, broken or
disconnected?
Are the relay connector (J503) disconnected or almost disconnected? (Are they locked with the
latches?)
YES
1. Reconnect the harness.
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2. Replace the laser optical unit.
3. Replace the LGC board.
NO
Is the pin CN405-4 on the power supply unit +5V?
NO
1. Check if there is any abnormality in the harness (e.g.: if it is caught)
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|
2. Replace the power supply unit.
YES
Is the pin CN361-4 on the LGC board +5V?
NO
1. Check if the harness between the power supply unit and the LGC board is
|
|
2. Replace the LGC board.
YES
1. Check if the conductor pattern on the LGC board is short circuited or open circuited.
2. Check if the units with high-voltage (developer unit, transfer belt unit, 2nd transfer roller
unit) are securely grounded.
3. Check if the bias supply joints of the units with high-voltage are securely connected or they
are not stained.
4. Check if the plate in the paper transport system is securely grounded.
5. Check if the equipment is grounded.
6. Check if the laser unit cooling fan is stopped.
7. Check if the suction area of the laser unit cooling fan is plugged up.
8. Replace the laser optical unit.
9. Replace the LGC board.
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between the power supply unit and the LGC board.
open circuited, broken or disconnected.
6 - 69
e-STUDIO2020C/2330C/2820C/2830C/3520C/3530C/4520C
ERROR CODE AND TROUBLESHOOTING
6
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