Toshiba Strata DK 280 Installation Manual page 655

Flowchart 12-3
Station Dial Tone Faults
Replaceable Station
PCBs
PEKU, PESU, PSTU, -
RSTU, RDSUIRSTS,
PDKU
Check station wiring
per Section 12.6.
Repair if necessary.
YES
END
q and retest 1
Replace the PCB
( 3-c
NO
>=w( 3-D -)
YES - Check the cabinet
Replace the defective
t to the
/ faultv stationfs) onlv W R-F \
Dower su~~lv oer I
1 unit and return i
r
Test the common
control PCB per
Section 12.4.
I I
I
Retest.
I
I
NO
Call your technical
support group.
DK0497
January
1996
12-9