16
TROUBLESHOOTING HINTS
1. The bell does not ring.
Deletion of the Caller ID memory
To delete the Caller ID memory in the EEPROM, proceed with the following process:
1) Connect the battery with pressing and # buttons, and keep pressing the buttons continuously for
approximate 2 seconds.
2) Release buttons when entering TEST mode with beep.
3) Press CID button.
4) A confirmation beep will sound after about 8 seconds, then the data for caller ID is deleted.
(Note: Do not disconnect the battery until you hear the confirmation beep, otherwise the data may not be
completely deleted.)
When the INTCOM key of
the base is pressed, does
the ringer on the handset
ring?
OK
When the TEL SG is joined
with the base to make bell
signal, is there pulse wave
at pin 4 of IC4?
OK
Is there pulse wave at pin
18 of IC22?
OK
Check IC22 and its
peripheral circuit.
See 2. The bell does not
ring & page does not ring.
NG
Check IC4 and TEL
network circuit.
NG
Check R35, R65 and C49.
NG
Содержание FT-8859
Страница 2: ...CORDLESS TELEPHONE SERVICE MANUAL FILE NO 2B0 9907 FT 8859 PUBLISHED IN JAPAN Oct 1999 ...
Страница 11: ...9 BLOCK DIAGRAMS Base Unit ...
Страница 12: ...10 Handset Unit ...
Страница 13: ...11 12 SCHEMATIC DIAGRAMS Base Unit Main ...
Страница 14: ...13 Base Unit Key NOTES 1 RESISTANCE VALUES ARE SHOWN IN OHMS UNLESS OTHERWISE NOTED K KIRO OHM M MEG OHM ...
Страница 15: ...14 15 Handset ...
Страница 30: ...30 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 31: ...31 Base Unit Key PCB ...
Страница 32: ...32 Handset Main PCB ...
Страница 33: ...33 34 WIRING DIAGRAMS Base Unit ...
Страница 34: ...35 Handset ...
Страница 35: ...36 EXPLODED VIEWS AND MECHANICAL PARTS LIST Base Unit SPEAKER KEY PCB RF MODULE BASE MAIN PCB ANTENNA ...
Страница 37: ...38 Handset 7 8 4 15 1 16 17 18 17 5 10 22 11 21 12 20 2 9 6 19 13 14 3 17 RF MODULE HANDSET MAIN PCB ASSY ...
Страница 57: ......