22
7. The voice of the caller cannot be heard (incoming call).
Can the base and handset be
connected?
See 3. The base and handset
cannot be connected.
OK
NG
The 1 kHz, 82.0mV sine
waveform is applied to TEL-
line of the base, can the 1 kHz
sine waveform from the Q7
collector be fed?
Check the base TEL-line
circuit and REPLAY control
circuit.
NG
Check whether there is the
1 kHz sine wavefor m at
pin 12 of IC2.
Check IC2 and its peripheral
circuit.
NG
OK
OK
Check whether there is the
1 kHz sine waveform at pin
17 ot IC602.
Check C611, R631, R629,
R639, R641, C670, C671.
NG
OK
Check whether there is the
1 kHz sine waveform between
1 and 2 of SP801.
Check C612, C614, W801,
W802.
NG
OK
Check SP801.
Summary of Contents for FD-9839
Page 2: ...CORDLESS TELEPHONE SERVICE MANUAL FILE NO 2B0 9911 FD 9839 PUBLISHED IN JAPAN Dec 1999 ...
Page 9: ...7 BLOCK DIAGRAMS Base Unit Main ...
Page 10: ...8 Base Unit Key ...
Page 11: ...9 Handset ...
Page 12: ...10 11 SCHEMATIC DIAGRAMS Base Unit Main ...
Page 13: ...12 13 Base Unit Key ...
Page 14: ...14 15 Handset ...
Page 33: ...34 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 34: ...35 Base Unit Key PCB ...
Page 35: ...36 Handset Main PCB ...
Page 36: ...37 38 WIRING DIAGRAMS Base Unit ...
Page 37: ...39 Handset ...
Page 64: ......