Toshiba FD-4809, Руководство по обслуживанию

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15
3. The base and handset cannot be connected.
Check whether the base
is able to set in the test
mode 1.
OK
NG
A
Check IC4 and its
peripheral circuit.
Check base RF unit and
the peripheral circuit of
IC1, Q1, FT1and FT2.
Check the TX POWER
and the TX FREQUENCY
on the base unit.
OK
NG
Check base RF unit.
Press “PAGE” key twice,
check whether deviation
of the TX data is app.
±23kHz~±45kHz Dev.
OK
NG Check whether there is a
pulse data waveform at
C47. Check whether there is a
pulse data waveform at
pin 40 of IC2. NG
OK
Check base RF unit.
P r e s s “ PAG E ” key 2
times, 903.417756 MHz
(30kHz ±30kHz Dev.)
1mV output signal from
RF jack is applied.
Can the IN USE/CHARGE
LED be lighted?
OK
NG Check whether there is a
30kHz waveform at C3. NG
OK
Check whether there is a
30kHz pulse waveform at
pin 34 of IC2. Check R4, R5, R6, R8,C3,
C4, C5, D1, IC2 and their
peripheral circuit. NG
OK
Check IC1 and its
peripheral circuit.
OK
Check whether the
handset is able to set in
the test mode 1.
OK
NG Check IC606 and its
peripheral circuit.
Check the TX POWER
and the TX FREQUENCY
on the handset unit.
OK
NG
Check handset RF unit.
C h e c k I C 2 a n d i t s
peripheral circuit. NG
OK
Check R77, C50, R75,
C48 and C47.
NG C h e c k w h e t h e r t h e
voltage at pin 10 of IC1
is more than 1V.
Check C22, IC4 and its
peripheral circuit.