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TROUBLE
SHOOTING
GUIDE
L
h
I
9.
No
Is the right tone signal being output to pin(l O) of ICOO1 ?
b Check ICOO1.
I
1
Yes
10,
L
1.
2.
3.
4.
5.
6.
7.
Is the right tone signal being reached to collector
of QO13 ?
%1
Check QO13, CN651 and CNO02
I
The intercom does not operate.
No
Does the handset transmit with the telephone
line ?
Refer to the station (e) and (f).
' (e : transmission
signal), (f : No. voice sig-
Vec
nals emitte's
voice communication.)
I
.
-v
(Handset + Base Station)
1
I
+
Is
the voice signal from the handset
being output
from pin
'o
(6) of IC702 ?
) Check IC701.
I
1
1
1
I
Yes
4
1s the voice signal from the handset
being output
from pin
'o
Are the voltage leaves of pin 22, 23 and 24
(8) of IC702 ?
b in IC702 the same as those shown in the
"TAS MODE"
table ?
I
I
Is
the voice signal from the handset
being output from pin
No
(15) of IC702 ?
Check IC401.
Yes
I Check CN701 and SP701.
I
I Yes
(Base
Station+
Handset)
Does the voice
signal
that
is
input
from
the
base
station's
'o
microphone
being
output
from
pin
4 of lC701 ?
) Check microphone,
CN702 and D701.
#
Is the voice signal that is input from the base station's
mi-
No
crophone
being output from pin 3in IC701 ? 1?
} Is the level of pin (5) of IC701 "High"
?
Yes
No
-45–
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Table of Contents
Troubleshooting
