Olivetti d-Color MF4003 Service Manual page 482

d-Color MF4003/MF3303
5. TROUBLESHOOTING WHEN NG IS DISPLAYED ON THE SELF-DIAG. (INDIVIDUAL)
5.1 I2S check
5.1.1 Troubleshooting when NG is displayed for AUDIO (voice)
1. Turn OFF the main power switch, disconnect power cord from the outlet.
2. Correct the mounting of the CPU board if faulty.
3. Correct the mounting of the base board or the connection of connectors if faulty.
4. Replace the CPU board.
5. Replace the base board.
5.2 Various USB Check
5.2.1 Troubleshooting when NG is displayed for Keyboard
1. Turn OFF the main power switch, disconnect power cord from the outlet.
2. Correct the mounting of the keyboard if faulty.
3. Correct the mounting of the USB hub board if faulty.
4. Replace the keyboard.
5. Replace the USB hub board.
5.2.2 Troubleshooting when NG is displayed for USB Memory
1. Turn OFF the main power switch, disconnect power cord from the outlet.
2. Correct the mounting of the USB memory if faulty.
3. Correct the mounting of the USB hub board if faulty.
4. Replace the USB memory.
5. Replace the USB hub board.
5.3 CPU board check
5.3.1 Troubleshooting when NG is displayed for Ping Test
1. Turn OFF the main power switch, disconnect power cord from the outlet.
2. Check, and correct the MFP network settings if faulty.
3. Correct the mounting of the CPU board if faulty.
4. Correct the mounting of the base board or the connection of connectors if faulty.
5. Replace the CPU board.
6. Replace the base board.
Service Manual
L TROUBLESHOOTING > 5. TROUBLESHOOTING WHEN NG IS DISPLAYED ON
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THE SELF-DIAG. (INDIVIDUAL)
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