The Icm (Incoming Message) Recording Does Not Operate; The Icm Signal Does Not Emanate From The Speaker; The Remote Control Signal Does Not Emanate - Sanyo CLA-1380 Service Manual

TROUBLE SHOOTING GUIDE
k-1
1.
2.
3.
k-2
1.
2.
3.
I
1.
2.
3.
4.
.
The ICM (incoming message) recording does not operate.
Is the voice signal from the telephone line being output from 'o Check CN901, R902, R908, C916, L903,
T901's secondary side ?
+ L904, RY901 and
1901.
Does the voice signal from the telephone line being output No
from pin (3) of IC702 ?
Check Q701 ,Q703.
1
I
Yes
+
Is the voice signal from the telephone line being output from 'o
Are the voltage level of pin (22, 23, 24) in
pin 4 of IC702 ?
+ IC702 the same as those shown in the
"TAS MODE" table.
,
Check Record/play head.
=
The ICM signal does not emanate from the speaker.
No
is ICM recording possible?
b Refer to the section (k-1).
I
No
Is the OGM signal output to the telephone line ? Refer to the section (j-3).
k
Are the voltage level of pin (22, 23 and 24) in IC702 the
same as those shown in the "TAS MODE" table.
&ti
The remote control signal does not emanate .
Does the remote signal being output from collector of Q701
H
Check CN901, R902, R908, C916, L903,
?
L904, RY901 and T901.
1 I
No
Is the remote signal output from pin (3) of IC704 ?
~
Check Q701, Q71O, Q711 and Q712.
.
No
Is the level of pin (15) of IC704 "High" ? b Check IC704.
Yes
No
When the signal is output from pin (15)
in IC704, are the
Yes
voltage levels of pin (1 1) through (14) the same as those in
) Check IC702. Check IC401.
the table "DTMF tone pairs into a 4-bit code" ?
'w
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