— 25 —
2. The bell does not ring & page does not ring.
Can the base and handset
be connected?
See 3. The base and
handset cannot be
connected.
OK
NG
When the INTCOM key of
the base is pressed, does
Pin 8 of J1 change from
high to low?
Press handset DIAL key
while in TALK MODE.
Can key touch sound be
heard from the ringer?
When the key of the
handset is pressed, can the
pulse output at pin 58 of
IC603 be seen?
NG
NG
Check IC603.
OK
At the Q606 collector, can
the pulse wave be seen?
NG
Check R627, R629, Q605
and Q606.
OK
Check RINGER Y601.
OK
NG
Check KEY RUBBER.
OK
Check IC18 and its
peripheral circuit.
Содержание FT-8258
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9801 FT 8258 CORDLESS TELEPHONE ...
Страница 10: ...BLOCK DIAGRAMS Handset Main 9 ...
Страница 11: ...Handset RF 10 ...
Страница 12: ...Base RF 11 ...
Страница 13: ...Base Main 12 13 ...
Страница 14: ... 14 15 SCHEMATIC DIAGRAMS ...
Страница 15: ... 16 17 Base RF ...
Страница 16: ...Base Key 18 19 ...
Страница 17: ... 20 21 Handset Main ...
Страница 18: ... 22 23 Handset RF ...
Страница 37: ...ELECTRICAL PARTS LOCATIONS Base Main 42 ...
Страница 38: ...Base RF 43 ...
Страница 39: ...Base Key 44 ...
Страница 40: ...Handset Main 45 ...
Страница 41: ...Handset RF 46 ...
Страница 42: ...WIRING DIAGRAMS Base 47 ...
Страница 43: ...Handset 48 ...
Страница 75: ...MECHANICAL PARTS LIST ...