IBM 7426 Manual page 30

4
Power
Test
'
Test
Mode
0
Unit
Ready
•
Line
Ready
0
Co mm
Check
0
Machine
Check
0
Have you used the Operator's Checklist (Chapter 3) since the failure occurred?
YES NO
1
0
Go to the Chapter
3
checklist.
0
Be
sure
that the modems and data link are operational (if you have them).
Does the problem still exist?
YES NO
1
0 Go
to the Chapter
3
checklist.
0
Go to Part 2 of this chapter and perform the External Port Test. When that is
finished, RETURN TO THIS POINT.
Does the problem still exist?
YES
NO
1
O
Go to the Chapter 3 checklist.
0 Perform initialization (Chapter 2), then RETURN TO THIS POINT.
Does the problem still exist?
YES NO
1
0
Go to the Chapter 3 checklist.
The problem is external to the 7426. You may wish to check the modems, direct
connect cable, or the loop (whatever your 7426 is attached to).
4-4