4. Cannot make a phone call (pulse).
5. Cannot make a phone call (tone).
OK
OK
NG
NG
Can the base and handset
be connected?
While in TALK MODE,
press dial key of the
handset.
Check whether square
waveform from pin 58 of
IC5 is fed.
Check Q15, RL1 and their
peripheral circuits.
See 3. The base and
handset cannot be
connected.
Check IC5.
OK
NG
NG
OK
NG
OK
Can the base and handset
be connected?
While in TALK MODE,
press dial key of the
handset. Can tone
waveform from pin20 of
IC11 is fed?
Can tone signal be heard
from the handset speaker?
Check the base TEL-line
circuit and RELAY control
circuit.
See 3. The base and
handset be cannot be
connected.
Check IC11 and
its peripheral circuits.
Check IC3, Q2 and their
peripheral circuits.
Содержание FT-8808
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Oct 1998 FILE NO 2B0 9810 FT 8808 CORDLESS TELEPHONE ...
Страница 10: ... 9 BLOCK DIAGRAMS Base Main ...
Страница 11: ... 10 Base RF ...
Страница 12: ... 11 Handset Main ...
Страница 13: ... 12 Handset RF ...
Страница 14: ...SCHEMATIC DIAGRAMS Base Main 13 14 ...
Страница 15: ...Base RF 15 16 ...
Страница 16: ...Handset Main 17 18 ...
Страница 17: ...Handset RF 19 20 ...
Страница 34: ... 37 ELECTRICAL PARTS LOCATION Base Main ...
Страница 35: ... 38 Base RF ...
Страница 36: ... 39 Handset Main ...
Страница 37: ... 40 Handset RF ...
Страница 38: ... 41 WIRING DIAGRAM Handset ...