– Check the Access Station cable for continuity. See “Access Station” on
page 5-14 for pin locations.
– Replace the keyboard, Access Station host card, Access Station client
card, or Access Station cable.
– If the symptom remains, replace the system board.
008
– Disconnect the keyboard cable connector from the system board.
– Power-on the system unit.
– Check the voltage at the keyboard cable connector on the system board
as shown in Figure 2-4, after the POST.
Note: Measure voltages with respect to Ground (Pin 3).
Pin
1
2
3
4
5
6
Voltage (Vdc)
KBD Data (+5.0)
Not Used
Ground
+5.0
Clock (+5.0)
Not Used
1
6
2
3
4
5
Figure
2-4. Keyboard Connector Voltage Check
ARE THE VOLTAGES CORRECT?
Yes No
009
Replace the system board.
010
Replace the keyboard. If the symptom remains, replace the system board.
Check Procedures
2-41
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