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3. The base and handset cannot be connected.
Check whether the base is
able to set in the test mode 1.
OK
Check the TX FREQUENCY
on the base unit.
OK
Check the TX POWER on the
base unit.
OK
Set the base in the test mode
3. Check whether deviation
of the TX data is app. 8kHz
Dev.
OK
Set the base in the test mode
6, 49.83MHz (200Hz 8kHz
Dev.) 1mV output signal from
ANT IN is applied.
Can the CHG LED be lighted?
OK
A
NG
Check the power peripheral
circuit, IC3 and its peripheral
circuit.
NG
Check Q2, D3 and their
peripheral circuits.
Try adjust TX VCO VOLTAGE
again.
NG
Check Q2, Q3, FT3 and their
peripheral circuits.
OK
NG
Check whether there is a
200Hz data waveform at pin
46 of IC3.
OK
Check R72, R73, R68, R53,
R50, R49 and C61.
NG
Check whether there is a
200Hz data waveform at pin
27 of IC1.
OK
Check Whether there is a
200Hz data waveform at pin
23 of IC1.
OK
Check whether there is a
200Hz data waveform at pin
33 of IC3.
OK
Check IC3 and its peripheral
circuit.
15
NG
Check IC3.
NG
Check MO1, FT1, FT2, L2, L4
and their peripheral circuits.
Try adjust RX VCO VOLTAGE
and DISCRI VOLTAGE again.
NG
Check R7, C29 and C26.
NG
Check R59.
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