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IBM 7426 Manual page 42

Terminal interface unit

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8
Testing Port 2
0
Loosen the retaining screws of the test plug
in port 1.
0
Remove the test plug from port 1 and insert
it in port 2.
D
Tighten the retainer screws.
0
Press the lnit!Test switch to Test (right).
ls the Test Mode lamp blinking and the Machine
Check lamp out (after 3 seconds)?
YES
NO
1
ls this the first time you have reached this step?
YES
NO
1
D
Note the failure and go to
Procedure 9.
D
Press the Power Switch to 0 FF ( 0).
D
Move the test plug from port 2 to port 0.
D
Restart Procedure 5, Powering On.
D
Go to Procedure 9.
4-16

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