• Code: EF23
• Description: Hole Punch Unit paper alignment abnormality
• Remedy: Is there any paper remaining on the transport path? YES 1. Open the front cover. 2. Remove the paper, not leaving any chips. NO Rotate the sideways adjustment motor (M2). Does it rotate smoothly? NO Fix the mechanism. YES Are the sideways deviation home position sensor (S3) and its wiring correct? NO Replace the sensor. Correct the wiring. YES Is the wiring between the hole punch control PC board (HP) and punch sideways adjustment motor (M2) correct? NO Correct the wiring. YES Are the paper position sensor (S6-1 and S6-2) and its wiring correct? NO Replace the sensor. Correct the wiring. YES Replace the hole punch control PC board (HP).

• Code: EF24
• Description: Hole Punch Unit paper trailing edge skew detection abnormality
• Remedy: Is there any paper remaining on the paper transport path? Is it staying at the position shown below? YES Figure out the cause of the paper stopping (e.g. folding) and correct it. Then remove the paper. NO Are the skew sensor (S7-1 and S7-2) and its wiring correct? NO Replace the sensor. Correct the wiring. YES Replace the hole punch control PC board (HP).

• Code: EF25
• Description: Hole Punch Unit paper trailing edge detection abnormality
• Remedy: Is there any paper remaining on the paper transport path? Is it staying at the position shown below? YES Figure out the cause of the paper stopping (e.g. folding) and correct it. Then remove the paper. NO Are the paper position sensor (S6-1 and S6-2) and its wiring correct? NO Replace the sensor. Correct the wiring. YES Replace the hole punch control PC board (HP).

• Code: EF27
• Description: Hole Punch Unit paper edge detection order abnormality-1
• Remedy: Is there any paper remaining on the transport path? YES Remove the paper, not leaving any chips. NO Are the skew sensor (S7-1 and S7-2) and its wiring correct? NO Replace the sensor. Correct the wiring. YES Replace the hole punch control PC board (HP).

• Code: EF28
• Description: Hole Punch Unit paper edge detection order abnormality-2
• Remedy: Is there any paper remaining on the transport path? YES Remove the paper, not leaving any chips. NO Are the skew sensor (S7-1 and S7-2) and its wiring correct? NO Replace the sensor. Correct the wiring. YES Replace the hole punch control PC board (HP).

• Code: F070
• Description: Communication error between System-CPU and Engine-CPU
• Remedy: (1) Check the version of the system ROM on the SYS board. (2) Check the version of the engine ROM on the LGC board. (3) Check if the connector CN423 and CN424 on the IMG board and the connector CN319 and CN320 on the LGC board are completely inserted. (4) Check if the connector CN422 on the IMG board and the connector CN135 on the SYS board are completely inserted. (5) Check if the connector pin between the IMG board (connector CN422) and the SYS board (connector CN135) is disconnected. (6) Check if the conductor patterns on the IMG board, LGC board and SYS board are short circuited or open circuited. (7) Replace the LGC board if no problem is found in steps from (1) to (7) above. (8) If the problem is not corrected with the replacement of the LGC board, reinstall the removed LGC board and replace the SYS board. (9) If the problem is still not corrected with the replacement of the SYS board, reinstall the removed SYS board and replace the IMG board.

• Code: F090
• Description: SRAM abnormality on the SYS board
• Remedy: (1) Turn the power OFF and start up the Setting Mode (08). (2) When “SRAM ERROR DOES IT INITIALIZE” is displayed on the LCD, check the destination and then press the [START] button. If the destination is not correct, key in the correct one and then press the [START] button. (3) After the confirmation message is displayed on the LCD, press the [INTERRUPT] button (to initialize the SRAM). (4) Perform the panel calibration (08-692). (5) Enter the serial number (08-995). Be sure that the serial number is the same as that on the identification label attached on the rear cover of the equipment. (6) Initialize the NIC information (08-693). (7) Turn the power OFF and then start up with the Adjustment mode (05). (8) Perform “Data transfer of characteristic value of scanner” (05-364). (9) Perform “Automatic gamma adjustment” <PRC> (05-1642) (using [4] [FAX] test pattern). (10) Perform “Automatic gamma adjustment” <PRT (600dpi)> (05-1008) (using [70] [FAX] test pattern). (11) Perform “Automatic gamma adjustment” <PRT (1200dpi)> (05-1009) (using [230] [FAX] test pattern). (12) Turn the power OFF and then back ON. If the error is not recovered, replace the SRAM on the SYS board.

• Code: F100
• Description: HDD format error: HDD cannot be initialized normally.
• Remedy: (1) Check if the HDD is mounted. (2) Check if the specified HDD is mounted. (3) Check if the connector pins of the HDD are bent. (4) Check if the connectors CN116, CN132 on the SYS board is disconnected. (5) Replace the harness. (6) Format the HDD. (Key in “2” at 08-690.) (7) Replace the HDD. (8) Replace the SYS board.