OKI C532dn

1.1 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.

1.2 Checking power supplies

Check item	Checking method	Action in case of NG
AC power supplied to CU/PU board	Check the supplied voltage of the connector on the CU/PU board. POWER connector 7pin: 5V 8pin: 0V 12,13,14pin: 24V 9,10,11pin: 0V	Replace the low-voltage power supply. Replace the POWER cable.
AC power supplied to TP1 board	(C542)Check the supplied voltage of the SUIF connector on the TP1 board. 1,2,3,6pin: 5V 4,5,20,21,22pin: 0V	Replace the CU/PU board or FFC cable.
	(C532)Check the supplied voltage of the CN502 connector on the 76P board. 1,3pin: 5V 8pin: 3.3V 2,4pin: 0V	Replace the CU/PU board or FFC cable.
AC power supplied to LCD	(C542)Check the supplied voltage of the TFT connector on the TP1 board. 33,34pin: 3.3V 2pin: 5V 4,5,9,13,17,21,25,29,35,36pin: 0V	Replace the TP1 board or LCD.
	(C532)Check the supplied voltage of the CN501 connector on the 76P board. 7pin: 3.3V 8pin: 0V	Replace the 76P board or LCD.

1.3 Checking LSI operation

Check item	Checking method	Action in case of NG
I/F signal from CU/PU board to TP1 board	(C542)Check whether signals are output to the OPE_TP1 connector on the CU/PU board. 8,9pin: Transmission / Reception data 11pin: Reboot Signals should be always output under normal conditions.	Replace the CU/PU board.
	(C532)Check whether signals are output to the OPE_76P connector on the CU/PU board. 6pin: Reception data 8pin: Transmission data 7pin: Reset Signals should be always output under normal conditions.	Replace the CU/PU board.