OKI ES5432
Troubleshooting. 2.2 No operation
2.1 Checking connections
Check item | Checking method | Action in case of NG |
---|---|---|
Connection between the printer and AC power supplied | Check the connection between the printer and AC power supplied. | Connect the AC cable properly. |
Cable assembly connecting low-voltage power supply unit to CU/PU board | Make sure the low-voltage power supply unit is connected to the POWER connector on the CU/ PU board properly. Check whether the cable connector is half-connected or tilted. | Connect the cable properly. |
Check whether there is any fault in the cable assembly, e.g., missing wires. | Replace the cable with a good cable. | |
Connection between CU/PU board and TP1 board | Make sure the 20-pin FFC is connected to the OPE_TP1 connector on the CU/PU board properly. Check whether the cable connector is half-connected or tilted. |
Connect the FFC cable properly. |
Check for broken wires using a tester. Check visually whether the sheath peels. |
Replace the FFC cable with a good cable. |
2.2 Confirmation of the power switch LED
Check item | Checking method | Action in case of NG |
---|---|---|
Power Switch LED | Confirm whether the LED is off. If the LED blinks rapidly, the number of blinking times in a cycle shows an error. The timing of blinking rapidly is shown in the below figure | Replace either of the low-voltage power supply unit, the CU/PU board, Power SW-board, the cables connected to the low-voltage power supply unit and CU/PU board or the cables connected to the CU/PU board and Power SW-board. In case of 2, 4, 8 or 10 times of LED blinking rapidly: Replace either of the low-voltage power supply unit, the CU/ PU board, the cables connected to the lowvoltage power supply unit and the CU/PU board. In case of 3, 6 or 9 times of LED blinking rapidly: Replace the CU/PU board. |
2.3 Checking power supplies
Check item | Checking method | Action in case of NG |
---|---|---|
AC power supplied to printer | Check the supplied voltage of the AC power supplied. | To supplies the AC power. |
AC power supplied to CU/PU board | Check the supplied voltage of the connector on the CU/PU board. POWER connector 7pin: 5V 12,13,14pin: 24V 8,9,10,11pin: 0V |
Replace the low-voltage power supply. Replace the POWER cable. |