Door Phone Faults; Chart No. 12 - Toshiba Strata DK24 Installation And Maintenance Manual

DOOR PHONE FAULTS

Start here to clear
Door Phone faults.
DDCB
Verify that the
DDCB is connected
to a PDKU circuit on
Port 04, 12, 20 or 28
To
NO
DP1
Page 24

CHART NO. 12

From
DP
Page 6
Did
you arrive
NO
here from the
Fault Classification
Flowchart?
YES
Is the
Door Phone
(DP) Control Box a
DDCB or
HDCB
YES
Does
electronic or digital
NO
telephone
function properly
on same port?
YES
Does digital
or electronic telephone
tone ring once or five times
when DP button is
pressed?
YES
To
DP2
Page 25
-23-
STRATA DK FAULT FINDING
SECTION 400-096-500
SEPTEMBER 1992
Go to
Page 6 to
classify fault.
HDCB
Verify that the
HDCB is connected
to a PEKU circuit
on Port 04, 12, 20,
or 28
To
S3
Page 9