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Fault detection and locating
553-2601-500A
Standard 2.0
December 1994
Table 1
Alarm indications (Part 1 of 2)
Type of fault
Trouble indicator
CE/PE1
LED
OFF
PE 2-5
LED
OFF
RECT
LED
OFF
FN
LED
OFF
CE LN
XFR
ON
CAB
INP
OFF
REM
ALARM
ON
ATT MJ
ALARM
ON
TTY
MSG
PE1
LN XFR
ON
PE 2-5
LN XFR
ON
+5 V
+12 V
+10 V
+6 V
PE1
+15 V
–15 V
PE1
–12 V
–10 V
–6 V
PE1
–48 V
PE1
–52 V
(–47 V)
AL
–52 V
(–42 V)
TRIP
86 V
RMS
DCON
Rectifier
Note:
Individual shelf transfer if +10, –10, or –48 volts fail on shelf power converter.
(Note)
(Note)
(Note)
