The Number Cannot Be Dialed; Pulse Mode Troubles; Troubleshooting Guide - Sanyo CLA-1380 Service Manual

TROUBLE SHOOTING GUIDE
2.
3.
4.
5.
6.
7.
8.
@
I I
Does the voice signal reach secondary of T901 ?
I
Yes No
I I
Check T901.
I
I
Is the level of pin (54) of IC401 "High"?
Yes
I
Is
the level of collector of Q90i' "Low"? I
Does the voice
signal reach pin
(E) of Q701 ?
Yes
~ 'No ~ ' a
Check Q701.
+
No
Does the voice signal
reach pin (24) of lC602 ?
)
Check IC601, Q71O, Q711 and Q712.
Yes
No
Does the voice signal reach pin (18) of IC602 ? Is the level of pin (17)
of IC602 "High"?
1
I I !
'ies Yes
No
+
HANDSET
ee
+
Does the voice level reach pin (18) of IC351 ? Check IC351.
1
Yes
+
Does the voice level reach pin (3) of IC651 ?
Y
'0 '~
Is the level of pin (10) of IC651 "High"?
Yes
+
Does the voice signal reach terminal speaker?
* check[c;l
No
+
Check QO1O, QO11 and Speaker.
I
The
number cannot be dialed.
9.
PULSE MODE
1.
No
Is the High/Low signal being emitted to pin (54) of IC401 ?
Yes
2.
Is Q907 switching?
-
~'=-
Yes
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