IBM 6648, 6578, 6579, 6269, 6059, 6058, 6569, 6568, 6649 manual Keyboard, Printer

Keyboard

Note: If a mouse or other pointing device is attached, remove it to see if the error symptom goes away. If the symptom goes away, the mouse or pointing device is defective.

- Power-off the computer.

Disconnect the keyboard cable from the system unit.

Power-on the computer and check the keyboard cable connector on the system unit for the voltages shown.

All voltages are 5%.

Pin	Voltage (Vdc)
1	+ 5 . 0
2	Reserved
3	Ground
4	+ 5 . 0
5	+ 5 . 0
6	Reserved

65

43

21

ARE THE VOLTAGES CORRECT?

If NO, continue with	.
If YES, proceed to	.

Replace the system board.

On keyboards with a detachable cable, replace the cable. If the problem remains or if the cable is permanently attached to the keyboard, replace the keyboard. If the problem remains, replace the system board.

Printer

1.Make sure the printer is properly connected and powered on.

2.Run the printer self-test.

If the printer self-test does not run correctly, the problem is in the printer. Refer to the printer service manual.

Chapter 2. Types 6568/6569/6648/6649 29