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Step 1 .
Unplug keyboard cable
from connector on processor
unit back plate .
Pin 2
Pin 3
5 . 0 ± . 25
5 . 0 ± . 25
Step 2 .
P lug in keyboard cab l e .
Pin 3
Pin 2
0 . 2 ±0 . 1
4 . 8 ± . 25
Step
3 .
Hold
key
Pin 3
Pin 2
0 . 2 ±0 . 1
4 . 8 ± . 25
3 . 7
KEYPAD AND SOFTKEY C H EC K S
3 . 7 . 1
KEYPAD AND SOFTKEY ECHO TEST - - TEST 1 9
The keypad and softkey echo test may be cal led for either on the keyboard
or on the keypad and so ftkey assemb l y .
echo test on the keyboard and to perform the test :
1 .
Reset the IBM 9001 by switching the computer to "OFF" and back t o
II
"O N .
Wait at least until automatic diagnost ic Test 4 is running and press
2 .
the ESC key .
The operating system label appears .
P l ace the diagnost ic disk, DIA G77 , into the disk drive .
3 .
Type DIAG7 7 and press the return key .
4 .
STOP KEY THE N EXECUTE KE Y TO START MA N UAL DIA GN OSTICS" .
Press the ESC key and the FlO key.
5 .
Optional Diagnostic , Voltage , and Resistance Checks 3 - 10
Keyboard Check Chart
Pin 6
Pin 4
0 . 1 ±0 . 1
5 . 0 ± . 25
Pin 6
Pin 4
4 . 8 ± . 25
5 . 0 ± . 25
down .
Pin 6
Pin
4
4 . 8 ± . 25
5 . 0 ± . 25
To cal l for the keypad and softkey
Procedure
I f voltages listed are
present , perform Step 2 .
See Figure 4 - 1 .
I f not , replace p l anar
board.
If voltages listed are
present , perform Step 3 .
See Figure 4 - 1 .
I f not , replace
keyboard . I
I f vo ltages listed are
present , replace p lanar
board .
I f not , replace
keyboard.
The computer responds "PRESS
I
I
I
I
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