Fault Finding - Toshiba strata CT Installation & Maintenance Manual

Fault Finding

Flowchart 8-3
Replaceable Station
PCBs:
Strata CT:
PEKU,PESU, PSTU,
RSTU, RDSU/RSTS
H
C
8-10
Station Dial Tone Faults
Check station wiring
per the Station Cable
Continuity Check
START
in this chapter.
Repair if necessary.
Is the
faulty station on a
replaceable station
PCB?
No
3-3
Are
the faulty
station(s) only in the
Expansion
cabinet?
No
3-7
Replace the Base or test the
Strata CT common control PCB
per the Fault Isolation section.
Initialise the system
(Prog: 91-9 and 03).
Retest.
Is the
fault
cleared?
Yes
Go to
3-4
3-1
Is the fault YES
cleared?
No
3-2
Yes
Replace the PCB
and retest
Is the fault
No
cleared?
Change the
YES
Expansion cabinet
3-5
and retest or check the
cabinet power supply
per the RPSU280
power supply test.
Then replace the
cabinet.
3-6
Is the
fault
cleared?
Call your technical
No
support group.
Strata CT I&M Manual October 2000
END
3-8
Yes
3-4
Replace the defective
unit and return it to the
repair center
END
Yes
Go to
3-4
No
1881