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Operator Panel Information
Read the following about the operator panel and review Procedure 4 before
you proceed.
lnitialization/
Test Switch
lndicator Lamps
Power Switch
,„ [[]
Test
Mode
Unit
Une
Comm
Machine
0
Ready
Ready
Check
Check
©
0
0
0
0
0
Off
On
Power Lamp
While the Power Switch is off (0), press the lnit/Test switch, both to the left
and to the right, just to get the feel of it. The switch is spring-loaded and
will return to the neutral position.
Under some conditions, the Machine Check lamp will blink momentarily.
This is normal and requires no action. But, if the Machine Check lamp
should remain on any time during these setup procedures, it indicates a 7426
test failure. You must then power off and restart the setup procedures.
lf a problem persists, notify your supervisor and
return the 7426 to IBM (see Chapter 5).
When the 7426 is powered on, it will automatically perform a self-test. This
will last for about
20
seconds. When the self-test has ended, the Unit Ready
and Test Mode lamps will begin to blink. This is your signal to press the
lnit/Test switch to Test (right). The switch must be pressed within 6
seconds after the lamps begin to blink.
1-4
Machine Check Lamp
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