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.
Summary of Contents for FT-8808
Page 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Oct 1998 FILE NO 2B0 9810 FT 8808 CORDLESS TELEPHONE ...
Page 10: ... 9 BLOCK DIAGRAMS Base Main ...
Page 11: ... 10 Base RF ...
Page 12: ... 11 Handset Main ...
Page 13: ... 12 Handset RF ...
Page 14: ...SCHEMATIC DIAGRAMS Base Main 13 14 ...
Page 15: ...Base RF 15 16 ...
Page 16: ...Handset Main 17 18 ...
Page 17: ...Handset RF 19 20 ...
Page 34: ... 37 ELECTRICAL PARTS LOCATION Base Main ...
Page 35: ... 38 Base RF ...
Page 36: ... 39 Handset Main ...
Page 37: ... 40 Handset RF ...
Page 38: ... 41 WIRING DIAGRAM Handset ...
