17
4. Cannot make a phone call (pulse).
Can the base and handset
be connected?
See 3. The base and handset
cannot be connected.
While in TALK MODE, press
dial key of the handset.
Check whether square
waveform from pin 1 of IC2
is fed.
Check IC2.
Check Q10, RL1 and their
peripheral circuits.
NG
OK
OK
5. Cannot make a phone call (tone).
Can the base and handset be
connected?
See 3. The base and handset
be cannot be connected.
OK
NG
While in TALK MODE, press
dial key of the handset.
Can tone waveform from Pin
20 of IC8 is fed?
Check IC8.
OK
NG
Can tone signal be heard
from the handset speaker?
Check IC1, Q3 and their
peripheral circuits.
NG
OK
Check the base TEL-line
circuit and RELAY control
circuit.
NG
Summary of Contents for FT-8800
Page 1: ...CORDLESS TELEPHONE SERVICE MANUAL FILE NO 2B0 200007 FT 8800 PUBLISHED IN JAPAN Sep 2000 ...
Page 8: ...7 BLOCK DIAGRAMS Base Unit B301 ...
Page 9: ...8 Handset B501 ...
Page 10: ...9 10 SCHEMATIC DIAGRAMS Base Unit B301 RF MODULE ...
Page 11: ...11 12 Handset B501 RF MODULE ...
Page 26: ...27 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 27: ...28 Handset Main PCB ...
Page 28: ...29 WIRING DIAGRAMS Base Unit ...
Page 29: ...30 Handset ...
Page 50: ......
