Toshiba DK8, DK 16 manual Chart no Station Dial Tone Faults, KCDU, Pdku PEKU, Pesu

FAULT FINDING

SECTION 100-816-500

MARCH 1993

CHART NO. 3

STATION DIAL TONE FAULTS

START

Replaceable Station

PCBs

DK8: QCDU and

QSTU

DK16 Base: KSTU

DK16 Expansion:

KCDU, PDKU,

PEKU, PESU

Check station wiring
per paragraph 8			3-1
	of this section.
Repair if necessary.
			Is the fault
			cleared?
				NO
		3-2

Is

the

faulty station on aYES replaceable station

PCB?

NO

YES

END

Replace the PCB

and retest

3-8

3-3

NO

Is the fault	YES
	3-4
cleared?

Are the	YES
faulty station(s) only
		3-5
in the DK16 expansion
unit?

NO

3-7

Replace the DK8 or DK16 Base KSU and initialize the system (Prog: 90, 92, 03).

Retest.

Is the

faultNO cleared?

YES

Go to

3-4

Change the expansion

unit and retest.

3-6

Is the

fault

cleared?

NO

Call your technical

support group.

Replace the defective unit and return it to the repair center

END

YES	Go to
	3-4

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