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TROUBLE
SHOOTING
GUIDE
A'
a.
The base station does not operate.
1.
2.
3.
4.
W&
5.
6.
7.
b.
1.
&
2.
3.
c.
1.
2.
Is the AC adaptor connected
to an AC 240V line ?
Is the jack (DC 9V) connected
to the base station ?
Yes
+
Pfo
Is the voltage of AC adaptor output 9V ?
is the voltage
of
pin
(1)
of ic904 9V or higher ?
'
Check AC adaptor.
Yes
+
No
1s the voltage of pin (3) of IC904 6.OV ?
Is the voltage of pin (56) of IC401 5.3V ?
No
+ Check D401.
1
Is the level of pin (26) of IC401 "High"
?
No
) Check IC402.
No
Is the frequency
of pin (25) of IC401 "4.15MHz"
?
} Check the OSC. circuit include
X401.
I
No
Is the level of pin (64) of IC401 "HIGH"
?
) Check D903, Q905 and Q401.
The handset does not operate.
No
Check battery.
IS the voltage of pin (39) of icOOl 3.3v or higher ?
' Check connector
(CNOO1).
Yes
+
Is the level of the reset terminal of pin (21) of icOOl "high"
?
'0
~
Check ICO03.
Yes
+
No
Is the frequency
of pin (20) of IC401 4.15MHz ?
} Check XOO1 and ICOO1.
The security code cannot be registered. (Base station)
(Voice communications
are not possible by pushing the TALK button. The unit does not link.)
No
Is
the level of pin (42) of IC401 "Low"
?
~
Check charger terminals
Q903 and Q904.
Yes
4
Is a modulation
signal (30MHz) being output to the antenna?
NO
Is TX data
being
output
to pin
(15)
of
'
IC602.
I
Check D201.
&
–40-
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Table of Contents
Troubleshooting
