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/-_. UNI1 (.;AN COPY, BUT CAN NOT TRANSMIT ! RECEIVE
I
KX-Fi200
Check solder at the
pins 18,48,49 of
10405 and R505,
C515,0514.
Connect the unit to
the loop simulator.
Switch : TX side T-R
: Connect oscillo-
scope
1
Modem test start
(Refer to page 20.)
1
I Is the four signal at
Tip-Ring output ?
NO
Is the signal at pin
44 of IC405 output ?
I NO
t ls the voltage at pin 5
NO
oflC4132.5V
?
YES
I Check the solder at
I
pin 73 of IC404.
Replace IC405.
I
Select 462Hz.
YE_S
Check the trace
between pin 44 of
IC405 and Tip-Ring.
Check the trace
between pin 1 of T1
and pin 48 of IC405.
Disconnect
loop
simulator.
Is the siganl at pin 48
of IC405 462Hz
input ?
I
YES
Replace IC405.
I
-57-
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