OKI MC561
Troubleshooting. Abnormal MFP operation after powered on. No operation
| Check item | Checking | Action in case of fail |
|---|---|---|
| Checking power supplies | ||
| AC power supplied to the printer | Check the supplied voltage from the AC power source. | Supply AC power. |
| 5V and 24V power supplied to CU/PU PCB | Check the power supply using the POWER connector on the CU/PU PCB. 7, 8, 9pin: 24V 1, 2, 3pin: 5V 4, 5, 6pin: 0VL 10, 11, 12pin: 0VP |
Replace the low-voltage power supply. |
| 3.3V, 5V, and 24V power supplied to SU PCB | Check the power supply using the POWER connector on the SU PCB. 1pin: 3.3V 3, 4pin: 5V 7, 8pin: 24V 2pin: 0V 5, 6pin: 0VL 9, 10pin: 0VP |
Replace the low-voltage power supply. |
| Checking connections | ||
| Connection between lowvoltage power supply unit and CU/PU PCB | Make sure the low-voltage power supply unit is connected to the POWER connector on the PU/CU PCB properly. Check whether the cable connector is half-connected or tilted, or whether wires are broken. Check whether there is any fault in the cable assembly, e.g., missing wires. |
Connect the cable properly. |
| Cable assembly connecting low-voltage power supply unit to CU/PU PCB | Replace the cable with a good cable. | |
| Connection between lowvoltage power supply unit and SU PCB | Do the checking as described in "Checking connections" | Do the checking as described in "Checking connections" |
| Cable assembly connecting low-voltage power supply unit to SU PCB | ||