Oki 24DX manual Printer does not work normally after being turned on, 134, Yes End

1The printer does not work normally after being turned on.

• Is

•No

message shown in the LCD display (for less than 1 second)?

Is the AC cable connected properly?

• No Connect the cable properly.

▼

• No Is the message (16 columns ■ display only on the top row ) shown in the LCD display?

• Yes Replace the Main board.

▼

• No Are the following voltages applied to the corresponding pins of the POWER connector on the Main board? (For the measuring points, see Figure 6-1.)

Pin 23: –8V, Pin 24: +8V, Pins 19, 20: +30V

Pins 9-12, 17, 18: 0V, Pins 13, 14: +5V

• No Remove the AC cable. Set the POW switch to the ON position.
Measure the resistance between L and N pins of the AC inlet using a
multimeter. Is there continuity between L and N pins (normal resis-
tance: 554 kΩ)? (For measuring points, see Figure 6-2.)
• No	Replace the fuse F2 or the Power Supply Unit (AC120V or
	230V)

▼

• Yes Are POWER connector of the Main board and Connection cord-Wire (26 pin) connected properly?

Are connection cord-wire and CN3 connector of the Power Supply

Unit (AC120V or 230V) connected properly?

• No Connect the connectors properly.

▼

• Yes Are the following voltages applied to CN3 connector of the Power Supply Unit (AC120V or 230V)? (For measuring points, see Figure 6- 3.)

Pins 19, 20: +30V, Pins 9-12, 17, 18: 0V

Pin 23: –8V, Pins 13, 14: +5V, Pin 24: +8V

		•	No	Replace the Power Supply Unit (AC120V or 230V).
▼
•	Yes	Replace the Connection cord-wire (26 pin).
▼
• Is the printer recovered?
		•	No	Replace the Main board
▼	YES	END
•

1-1

1-2

40930701TH DRAFT Vesion 134 /