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6. Voice cannot be transmitted to other party (outgoing call).
Can the base and handset be
connected?
See 3. The base and handset
cannot be connected.
OK
NG
Check IC602 and its
peripheral circuit.
NG
OK
Check whether there is the
1 kHz sine wavefor m at
RT602.
Check RT602 and its
peripheral circuit.
NG
OK
TX output signal from the
handset is detected by the
liner detector, can the 1 kHz
sine waveform be fed?
Check handset RF section.
NG
OK
Check whether there is the
1 kHz sine waveform at Pin 9
of IC4 on the base unit.
Check IC4 and its
peripheral circuit.
NG
OK
Check whether there is the
1 kHz sine waveform at Pin 3
of IC2.
Check RT4 and its
peripheral circuit.
NG
OK
Check whether there is the
1 kHz sine wavefor m at
pin 6 of IC2.
Check IC2 and its
peripheral circuit.
NG
OK
Check whether there is the
1 kHz sine waveform at the
Q3 collector.
Check IC2, Q3 and its
peripheral circuit.
NG
OK
Check whether the 1 kHz sine
wavefor m from TEL-line
output is fed.
Check T1, RL1 and their
peripheral circuits.
NG
OK
Check MC601 of handset.
Check base RF section.
NG
OK
T h e 1 k H z , 9 . 0 m V s i n e
w a v e f o r m i s a p p l i e d t o
M C 6 0 1 + side. Check
whether there is the
1 kHz sine waveform
at Pin 20 of IC602.
Содержание FT-8901A
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Oct 2001 FILE NO 2BO 200113 FT 8901A CORDLESS TELEPHONE ...
Страница 9: ...BLOCK DIAGRAMS Base Unit 8 ...
Страница 10: ... 9 Handset Unit ...
Страница 11: ...RF Section SCHEMATIC DIAGRAMS Base Unit 10 11 FT8901A Sche p65 01 10 15 10 42 Page 8 Adobe PageMaker 6 5J Win ...
Страница 12: ...Base Key Unit 12 13 FT8901A Sche p65 01 10 15 10 42 Page 9 Adobe PageMaker 6 5J Win ...
Страница 13: ...Handset Unit 14 15 RF Section FT8901A Sche p65 01 10 15 10 42 Page 10 Adobe PageMaker 6 5J Win ...
Страница 26: ... 28 Unit V Ref No Pin STBY TALK Note Note 61 2 9 2 9 IC608 62 2 9 2 9 63 2 9 2 9 64 2 9 2 9 ...
Страница 29: ... 31 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 30: ... 32 Base Unit Key PCB ...
Страница 31: ... 33 Handset Unit Main PCB ...
Страница 32: ... 34 WIRING DIAGRAMS Base Unit ...
Страница 33: ... 35 Handset Unit ...