Toshiba Strata AirLink DK40i, Руководство по установке и обслуживанию

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Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 6/00
14-13
Fault
F
inding
Flowchart 14-4 CO Line Dial Tone Faults
Is the
fault
cleared?
Go to
4-5
Call your technical
support group.
No
No
Yes
Yes
Retest.
Change the DK14 or DK40i Base KSU or test
the DK424 or DK424i common control PCB
per the Fault Isolation section and initialize the
system (Prog. 91-9 and 03).
Is the
fault
cleared?
Go to
4-5
4-7
No
No
Are the
faulty CO lines
only in the DK40i
Expansion KSU or one
DK424/DK424i
Cabinet?
4-10
4-5
Is the
fault
cleared?
4-4
Yes
START
Is the fault
cleared?
4-1
4-2
END
No
Are all
faulty CO lines
on a replaceable PCB
(not including KSU
motherboard)?
Yes
Change the PCB
and retest.
4-3
Yes
1.
2.
No
Replace the defective
unit and return it to the
repair center.
END
4-9
Yes
Change the expansion
unit and retest.
4-6
DK14
DK40i Base
KSU:
DK40i only:
DK40i
Expansion
KSU/DK424/
DK424i:
DK424/
DK424i only
Replaceable CO Line
PCBs:
1882
Check CO line wiring per Chapter 10.
Test central office line using a
standard telephone or butt set at the
TELCO block.
Repair as necessary.
QCDU
KCOU
TCOU
TDDU
TBUU
KCDU
RCOU
RCIU2
REMU
RDDU
PCOU
REMU
RCOS
RGLU
RBUU