18
TROUBLESHOOTING HINTS
1. The bell does not ring.
When the PAGE SW of the
base is pressed, does the
ringer on the handset ring?
When the TEL SG is joined
with the base to make bell
signal, is there pulse wave at
pin 4 of IC2?
Is there pulse wave at
pin 21 of IC11?
Check IC11 and its
peripheral circuit.
Check IC2 and TEL network
circuit.
Check R78,R82,R94 and
C76.
See 2. The bell does not ring
& page does not ring.
OK
OK
NG
NG
OK
NG
If you want to reset the unit to the factroy settings
You can cancel the OGM, PIN, and the clock settings by the following process.
1 Disconnect the AC adaptor and telephone line cord from the base. Keep the AC adaptor connected to the wall
outlet. Make sure that the telephone line cord remains disconnected furing this procedure.
2 While pressing the DELETE button, plug the AC power adaptor into the base. Keep pressing the DELETE
button for more than 4 seconds.
A beep sounds and “ P” blinks in the LED display.
To resume using the unit, connect the telephone line cord and place the handset on the base.
Note:
If you turn on the unit again, “ P” may flash.
Содержание FT-8939
Страница 2: ...CORDLESS TELEPHONE SERVICE MANUAL FILE NO 2B0 9904 FT 8939 PUBLISHED IN JAPAN Sep 1999 ...
Страница 11: ...9 BLOCK DIAGRAMS Base Unit Main ...
Страница 12: ...10 Base Unit DSP ...
Страница 13: ...11 Handset ...
Страница 14: ...12 13 SCHEMATIC DIAGRAMS Base Unit Main ...
Страница 15: ...14 15 Base Unit Key ...
Страница 16: ...16 17 Handset ...
Страница 33: ...34 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 34: ...35 Base Unit Key PCB ...
Страница 35: ...36 Handset Main PCB ...
Страница 36: ...37 38 WIRING DIAGRAMS Base Unit ...
Страница 37: ...39 Handset ...
Страница 40: ...42 Handset 7 8 4 1 16 17 17 5 10 15 11 12 2 9 6 13 14 3 17 MAIN PCB ASSY RF MODULE HANDSET ...
Страница 62: ......