Toshiba Strata DK40 - Flowchart 9-3 Station Dial Tone Faults

Fault Finding Fault Isolation Flowcharts
9-10
Strata DK40 I&M Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
Flowchart 9-3 Station Dial Tone Faults
START
Repair if necessary.
Is the fault
cleared?
3-1
END
YES
Is the
faulty station on a
replaceable station
PCB?
3-2
Replace the PCB
and retest
3-3
Replace the
DK40 Base KSU.
Initialise the DK40 system
(Prog: 91-9 and 03).
Are
the faulty
station(s) only in the
DK40 Expansion
KSU cabinet?
Is the
fault
cleared?
3-7
No
Retest.
3-5
YES
Is the
fault
cleared?
Yes
3-6
END
Go to
3-4
Go to
3-4
Call your technical
support group.
No
Yes
No
No
No
3-8
Yes
Is the fault
cleared?
No
Yes
3-4
Replace the defective
unit and return it to the
repair center
DK40 Base KSU:
K5RCU, KSTU3,
TBSU (NT) and all
PCBs in the DK40
Expansion Unit
Replaceable Station
PCBs:
Check station wiring
per the Station Cable
Continuity Check
in this chapter.
1881
Change the
DK40 Expansion
KSU and retest