Konica-Minolta AccurioPrint C759

Boot diagnosis function

• The boot diagnosis is performed when the start screen on the touch panel of the machine freezes or blacks out for some faulty condition.
• The boot diagnosis can be performed automatically to identify a cause of a problem when the machine fails to start properly. (The boot diagnosis can also be performed manually.)
• The result of the boot diagnosis is determined on the basis of the steady light conditions of the four LEDs of "data reception display".

1. Touch panel
2. LED1
3. LED2
4. LED3
5. LED4

Boot diagnosis sequence

1. A fault is detected when the machine is started. (Start screen freezes or blacks out)
2. Auto reboot is performed. (a maximum of three times)
3. The boot diagnosis is performed automatically.
4. After the boot diagnosis is completed, the machine stops with the data reception display staying lit up steadily.

Manual boot diagnosis procedure

1. Turn OFF the main power switch under the condition in which the start screen freezes or blacks out during the startup sequence.
2. Turn the main power switch on while pressing the power key.
3. After a short beep sound is made once, release the power key and close the front lower door or the front door.
4. The data reception display LEDs display the result of the boot diagnosis.
5. Check the steady light conditions of the LEDs and turn OFF the main power switch.
6. Perform the procedure according to the result of the boot diagnosis.

Boot diagnosis result list

No.	LED	Target device	Reason of error	Corrective action procedure
1	●●●● (All off)	MFP board	Faulty DDR Short-circuited signal line	Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more, and turn ON the main power switch. Replace the MFP board.
			Memory fault
2	○●●● (Only LED1 lights up steadily)	eMMC board	eMMC board failure eMMC board engagement/ mounting failure	Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more, and turn ON the main power switch. Reinstall the eMMC board. Replace the eMMC board. Replace the MFP board.
3	○○●● (LED1 and LED2 light up steadily)	Control panel unit	Control panel unit failure Control panel unit engagement/ mounting failure	Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more, and turn ON the main power switch. Check the control panel unit for proper installation. Correct the mounting of control panel unit if faulty. Reinstall the control panel unit. Replace the cable for the control panel unit. Replace the control panel unit.

How to reset the boot diagnosis result

1. Turn OFF the main power switch. Wait for 10 sec. or more, and turn ON the main power switch.
Reboot the machine.
NOTE
▪ The freeze state is reproduced if the cause of the fault has not been eliminated.