– 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
Summary of Contents for Aptiva 2159
Page 1: ...Hardware Maintenance Service for Service Level A Machine Type 2159 and IBM Monitors 2159...
Page 2: ......
Page 3: ...Hardware Maintenance Service for Service Level A Machine Type 2159 and IBM Monitors 2159...
Page 22: ...xx...
Page 24: ...xxii...
Page 124: ...2 72...
Page 184: ...5 22...
Page 186: ...6 2...
Page 190: ...Assembly 2 Machine Type 2159 System Unit Interior SL A 6 7 8 5 3 12 13 4 2 9 11 10 1 7 4...
Page 193: ...Assembly 3 Diskette and Hard Disk Drives 3 1 4 4 4 2 Parts Catalog 7 7...