— 15 —
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 pin67
of IC4 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 38 of IC604 be seen?
Check RINGER Y601.
Check DSP unit.
See 3. The base and handset
cannot be connected.
Check IC604.
OK
OK
OK
NG
OK
NG
NG
NG
At the Q608 collector, can the
pulse wave be seen?
OK
Check R654, R656, R657,
Q609, Q608 and D602.
NG
Summary of Contents for FT-8901
Page 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Apr 2001 FILE NO 2B0 200102 FT 8901 CORDLESS TELEPHONE ...
Page 9: ...BLOCK DIAGRAMS Base Unit 8 ...
Page 10: ... 9 Handset ...
Page 12: ...Handset 12 13 FT8901 Sche p65 01 05 01 12 12 Page 9 Adobe PageMaker 6 5J Win ...
Page 27: ... 28 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 28: ... 29 Handset Main PCB ...
Page 29: ... 30 WIRING DIAGRAMS Base Unit ...
Page 30: ... 31 Handset ...
