Fault Finding
Fault Isolation Flowcharts
14-12
Strata DK I&M 6/00
Flowchart 14-3
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 DK14 or DK40i
Base KSU. Or, test the DK424
or DK424i common control PCB
per the Fault Isolation section.
Initialize the
DK424/DK424i/DK40i system
(Prog: 91-9 and 03).
Are the
faulty station(s)
only in the DK40i
Expansion KSU or only one
DK424 or DK424i
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
DK14: QCDU,
QSTU2
DK40i Base KSU:
KSTU2 and all PCBs
in the DK40i
Expansion Unit
DK424 or DK424i:
PEKU, PESU, PSTU,
RSTU, RDSU/RSTS,
Replaceable Station
PCBs:
Check station wiring
per the Station Cable
Continuity Check in this
chapter.
1881
Change the DK40i
Expansion KSU and
retest or check the
cabinet power supply
per the RPSU280
power supply test.
Then replace the
DK424 or DK424i
cabinet
Summary of Contents for Strata AirLink DK40i
Page 22: ...Introduction Related Documents Media xx Strata DK I M 6 00 ...
Page 48: ...DK14 Installation DK14 Wiring Diagrams 1 26 Strata DK I M 6 00 ...
Page 220: ...DK424 Installation Remote Cabinet Installation Instructions 5 68 Strata DK I M 6 00 ...
Page 262: ...DK424i Configuration Primary Reserve Power Cabinet Hardware 6 42 Strata DK I M 6 00 ...
Page 450: ...Universal Slot PCB Wiring Option Interface PCB Wiring Diagrams 10 42 Strata DK I M 6 00 ...
Page 592: ...Peripheral Installation Enhanced 911 Service E911 12 84 Strata DK I M 6 00 ...
Page 616: ...ACD Installation Spectrum Electronic Wall Boards 13 24 Strata DK I M 6 00 ...
Page 634: ...Fault Finding Fault Isolation Flowcharts 14 18 Strata DK I M 6 00 ...
Page 704: ...ISDN Interfaces ISDN Disconnect Cause Code 16 54 Strata DK I M 6 00 ...