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MAPs Section
USING THE MAPS
The MAP charts are designed to identify a field
replaceable unit (FRU) or an adjustment for a symptom.
The symptoms are arranged in the charts according to
five combinations of conditions identified in the vertical
columns. They are:
1.
2.
3.
4.
5.
Power-on diagnostics complete to alarm, screen
not bla_nk, and conditions not normal with power
on.
Power-on diagnostics complete to alarm, screen
not blank, and conditions normal with power on.
Power-on diagnostics complete to alarm, but the
screen is blank.
Power-on diagnostics did not complete, and the
screen is not blank.
Power-on diagnostics did not complete, and the
screen is blank.
Locate the correct combination of conditions in the
vertical columns. Find the correct symptom in the
Symptom column. The Checks or Comments column
contains important information about the symptom or
repair action.
The Repair Action column identifies the FRU or
adjustment procedure. The numbers in parentheses are
references to the Maintenance Information section that
describes the replacement or adjustment.
I
Cursor
01-02
•
/
NORMAL CONDITIONS AFTER POWER ON
The following figure shows the normal conditions of the
display station after power on and with the controller
communicating. For further information concerning the
status line. see reference 520 Power-On Diagnostics.
Note: When a key is pressed, the character should be
displayed. The location of the cursor is determined by
the controller.
Status Indicators ( •
=
on; - -
=
off)
System Available. When on, it indicates that the system
controller is communicating with the display station.
Message Waiting. When on. it indicates that a message
is waiting for the display station operator.
Keyboard Shift. When on, it indicates that the
uppercase (level) characters are active.
Insert Mode. When on, it indicates that an insert
operation is in effect.
Input Inhibited. When on, it indicates that the system
cannot process a keyboard scan code.
A four-digit cursor location code is also displayed on
the status line. This code gives the row and column
location of the cursor. When the cursor is in the upper
leftmost corner, the code displayed is 01-02. The code
is always displayed, except when an error occurs and an
error status line is displayed (520).
/
. I
I .
Status Line
Note: Some display stations may display a sign-on
menu.
MAP Charts
2-1
I
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