19
Set the handset in the
test mode 3, check
whether deviation of the
TX data is app. 8 kHz
Dev.
Check whether there is
a 250 Hz data
waveform at C453.
OK
NG
Set the handset in the
test mode 6, 926.997467
MHz (250 Hz ±8 kHz
Dev.) 1mV output signal
from RF jack is applied.
Check whether the bell
ring.
OK
NG
Place the handset on the
base to charge about 5
seconds, then connect
again.
Check whether there is
a 250Hz data waveform
at the Q402 collector.
Check RT402, Q402 and
their peripheral circuits.
NG
Check IC404 and its
peripheral circuit.
OK
A
Check RT403, R441,
R442, R443, R444,
R445 and C453.
NG
Check handset RF unit.
OK
Check whether the 250
Hz data waveform from
pin 9 of IC401 is fed.
Check handset RF unit
and the peripheral
circuit of IC401.
NG
Check whether there is
a 250Hz data waveform
at pin 40 of IC404.
Check IC403 and its
peripheral circuit.
NG
OK
OK
Содержание FT-8509
Страница 2: ... 121 5 30 36 6 59 0 18 25 66 7 3 21 70 83 38 6 1 3 1 XJ1 4 ...
Страница 11: ...9 BLOCK DIAGRAMS Base Unit ...
Страница 12: ...10 Handset Unit ...
Страница 13: ...6 0 7 5 06 DVH 8QLW 0DLQ 45 44 ...
Страница 14: ...13 Base Unit ke NOTES 1 RESISTANCE VALUES ARE SHOWN IN OHMS UNLESS OTHERWISE NOTED K KILO OHM M MEG OHM ...
Страница 15: ... DQGVHW 0DLQ 48 47 ...
Страница 30: ...30 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 31: ...31 Base Unit Key PCB ...
Страница 32: ...32 Handset Main PCB ...
Страница 33: ...33 WIRING DIAGRAMS Base Unit ...
Страница 34: ...34 Handset ...
Страница 35: ...35 EXPLODED VIEWS AND MECHANICAL PARTS LIST Base Unit SPEAKER KEY PCB RF MODULE BASE MAIN PCB ANTENNA ...
Страница 37: ...37 7 8 4 1 16 17 17 5 10 15 11 12 2 9 6 13 14 3 17 Handset RF MODULE HANDSET MAIN PCB ASSY ...
Страница 53: ......