Flowchart 9-3 Station Dial Tone Faults - Toshiba Strata DK40 Installation & Maintenance Manual

Fault Finding

Flowchart 9-3 Station Dial Tone Faults

START
Replaceable Station
PCBs:
DK40 Base KSU:
K5RCU, KSTU3,
TBSU (NT) and all
PCBs in the DK40
Expansion Unit
9-10
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
Check station wiring
per the Station Cable
Continuity Check
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
DK40 Expansion
KSU cabinet?
No
3-7
Replace the
DK40 Base KSU.
Initialise the DK40 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
No
YES
3-5
DK40 Expansion
KSU and retest
Call your technical
No
support group.
Fault Isolation Flowcharts
END
and retest
3-8
Yes
Is the fault
cleared?
Replace the defective
unit and return it to the
Change the
3-6
Is the
Yes
fault
cleared?
No
Strata DK40 I&M Spring 1999
3-4
repair center
END
Go to
3-4
1881