Toshiba Strata DK 24, Installation And Maintenance Manual

Page: 284 / 372

STRATA DK FAULT FINDING
SECTION 400-096-500
SEPTEMBER 1992
-12-
CHART NO. 5
CO LINE FAULTS
PCOU
Page 6
From
Start here to
clear CO/PBX
faults.
NO
Did
you arrive
here from the
Fault Classification
Flowchart?
Go to
Page 6 to
classify fault.
Is
this a
programming
fault?
YES
END
Is
this an
ABR operation
fault?
Does
fault appear
on only one
CO/PBX line?
Are
all faulty
lines on the
same PCOU?
Reprogram
as required.
Replace
appropriate
PCOU.
NO
NO
NO
YES
YES
CO3
This
Page
To
CO1
This
Page
To
NO
Is
the fault
cleared?
Verify operation
of that CO/PBX
line.
Verify continuity
of wiring between
the PCOU and the
connecting block.
Is
it a CO/PBX
line fault?
CO1
This
Page
From
Call the
Service Center
for assistance.
Is
the fault
cleared?
CO3
This
Page
From
NO
CO2
This
Page
To
Contact TELCO
for CO line repair;
or replace PBX
line/fault.
Replace
the wiring.
Is
it a
wiring
fault?
YES
NO
END
Replace the
appropriate
PCOU PCB.
CO4
Page 13
To
NO
YES
NO
YES
Tag the
defective unit(s)
and return for
repair.
END
CO2
This
Page
From
YES
YES
YES
END