14
2. The bell does not ring & page does not ring.
Can the base and handset be
connected?
Press handset DIAL key
while in TALK MODE.
Can key touch sound be
heard from the ringer?
When the PAGE SW of the
base is pressed, does pin32
of IC2 change from high to
low?
Check IC4 and its peripheral
circuit.
When the key of the handset is
pressed, can the pulse output
at pin 58 of IC603 be seen?
Check RINGER Y601.
Check R55, R77 and S1.
See 3. The base and handset
cannot be connected.
Check IC603.
OK
OK
OK
NG
OK
NG
NG
NG
At the Q616 collector, can the
pulse wave be seen?
OK
Check R688, R673, R689,
R672, R629, Q616 and Q617.
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: ......
