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Operator Panel Information
Read the following about the operator panel and review Procedure 5, before
you proceed.
lnitialization/
lndicator Lamps
Power Switch
Test Switch
lnit [ ] ]
Test
0
Mode
©
0
Off
On
Unit
Line
Comm
Machine
Ready
Ready
Check
Check
0
0
0
0
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 procedures, it indicates a 7426 failure. Note
the failure and continue.
Machine Check Lamp
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.
4-12
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