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IBM 3279 2A Maintenance Manual page 54

Color display terminal maintenance analysis procedures
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SYSTEM INDlCATED FAILURE 0900
PAGE
1
OF
ENTRY POINTS
FROM
ENTER THIS MAP
MAP
ENTRY
PAGE
STEP
NUMBER
POINT
NUMBER
NUMBER
0100
BB
007
0800
A
001
001
(ENTRY POINT A)
Does the indicator rowan the screen
display any error indicator other than an
error code?
Y N
002
Does the indicator row. on the screen.
display an error code?
V N
003
Is the TEST/NORMAL switch in the
NORMAL pOsi
ti~,,?
VI
;~~t
switch in NORMAL position.
GO TO MAP
0000.
ENTRY POINT
A.
005
Is the security key lock turned fully
clockwise? (Use the Y path if there is
no security keylock feature),
VI
;~~n
the switch clockwise.
GO TO MAP
0000.
ENTRY POINT BB.
007
(ENTRV POINT
BB)
Are other displays connected to the
same Control Unit operating normally?
I
v
:.s08ee
the Control Unit MIM to isolate
the failure.
09
'Use the ERROR LOG to determine if
this terminal has had errors that
cause the Control Unit to disable the
terminal.
(See MIM section
2.6.2).
Does the error log contain any of the
error codes given in MIM section 2.6.6
? Take the N path if you don't know.
Y N
3 3 3 2
ABC D
Copyright IBM Corp
1981
MAP 0900-1
EXIT POINTS
EXIT THIS MAP
TO
PAGE
STEP
MAP
ENTRY
NUMBER
NUMBER
NUMBER
POINT
1
004
0000
A
3
040
0700
A
3
038
0800
A
4
053
0800
GG
04FEB81
MAP 0900-1

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