AT&T System 25 - Manual (Page 186)

MAINTENANCE
S Y S T E M
T R O U B L E
REPORTED
USER-REPORTED
DISCUSS THE TROUBLE
WITH SYSTEM USERS
CAP ALARM
REPORTED
CAP ALARMED
READ PERMANENT
SYSTEM ALARMS
TABLE IN ERROR
L O G :
A N D C H E C K
CIRCUIT BOARDS
AND POWER LED
STATUS
SYSTEM OR CANNOT
ACCESS ERROR LOG
DEFECTIVE
P O W E R
S U P P L Y
C H E C K P O W E R
L E D A N D F A N S
READ (1) PERMANENT SYSTEM
A L A R M S , ( 2 ) T R A N S I E N T
S Y S T E M E R R O R S T A B L E ,
AND/OR (3) MOST RECENT
SYSTEM ERRORS IN TABLE
E R R O R L O G ;
A N D C H E C K C I R C U I T
BOARDS AND POWER SUPPLY
L E D S T A T U S
C P U / M E M O R Y
CIRCUIT FRONTPLANE/
BACKPLANE DIAGNOSTIC REPLACE
POWER
SUPPLY
TYPE OF TROUBLE INDICATED
BY THE LEDS AND ERROR LOG ERROR LOG CONFIRMS
USER-REPORTED TROUBLE
PORTS P O W E R
S U P P L Y
C A B I N E T
OR FANS C P U / M E M O R Y
SERVICE CIRCUIT
F R O N T P L A N E /
B A C K P L A N E
D I A G N O S T I C
NO ERROR LOG
RESULTS
RECREATE USER-REPORTED TROUBLE
S T A T I O N S T R U N K S O T H E R
I S O L A T E T R O U B L E T O
REPLACEABLE MAINTENANCE
UNIT (SEE TEXT)
RUN
S T A T I O N
T E S T ( S )
SEQUENCE
R U N
T R U N K
TEST (S)
SEQUENCE
( D E P E N D I N G
O N P R O B L E M ,
SEVERITY)
FIRST. WARM
S T A R T . I F
PROBLEM PERSISTS
R E S T O R E
T R A N S L A T I O N S
F R O M T A P E . I F
PROBLEM PERSISTS
E S C A L A T E .
Figure 4-1. Response to System 25 Trouble Report
4-10