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TROUBLE
SHOOTING
GUIDE
3.
4.
5.
d.
1.
2.
3.
4.
+
No
Is the level of pin collector
of Q906 and
Is a carrier signal being output to the antenna ?
~ Q911 "High"
?
Yes
I
I Yes
No
Is
RX
data
being
input
to pin (60)
of IC401
?
Check IC401.
'0
-
w
+
Is
the level of
pin (57,
21)
of IC401
"Low"
?
Yes
No
F==--ll-=
1
No
IS RX data being output to pin (17) of IC301 ?
Check
Q101 and IC301.
The security code cannot be registered. (Handset)
(Voice communications
are not possible by pushing the TALK button. The unit does not link.)
No
Is the level of pin
(36)
of ICOO1 "High"
?
+ Check charger
terminals
and D951. QO07,
QO08.
Yes
&
IS
a
modulation
signal
(4
Is TX data
being
output
to pin (34) of ICOO1
?
' '?
Yes
Check D251.
Check ICOO1.
,
+
IS
a
carrier
signal
being
output
to the antenna
?
H
Is
there voltage in pin (C) of
QO02 ?
Yes
Is
RX
data being input to pin (8) of
ICOO1?
I
I No
Yes
I
1
Check ICOO1.
I
Is RX dada being output to pin (28) of IC351 ?
I
I
I
Yes
No
=
Is the level of pin (11) of ICOO1 "Low" ?
Check QO02.
Check ICOO1.
Is there voltage in pin (C) of Q253 ?
I
Yes
'1+
No
Check
Q251,
Q252
Check
CNO02
and
and Q253.
CN651 .
-41 –
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Table of Contents
Troubleshooting
