14
TROUBLESHOOTING HINTS
1. The bell does not ring.
When the INTCOM key 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 IC5 (Line1) or IC13
(Line2) ?
I s t h e r e p u l s e wave a t
pin 38 (Line1) or pin 39
(Line2) of IC14?
Check IC14 and its
peripheral circuit.
Check IC5 (Line1) or IC13
(Line2) and TEL network
circuit.
Check R58, C45 and R59.
See 2. The bell does not ring
& page does not ring.
OK
OK
NG
NG
OK
NG
Содержание FT-8259
Страница 1: ...CORDLESS TELEPHONE PUBLISHED IN JAPAN Sep 1999 SERVICE MANUAL FILE NO 2B0 9906 FT 8259 ...
Страница 8: ...7 BLOCK DIAGRAMS Base Unit ...
Страница 9: ...8 Handset ...
Страница 10: ...9 10 SCHEMATIC DIAGRAMS Base Unit Main ...
Страница 11: ...11 Base Unit Key ...
Страница 12: ...12 13 Handset ...
Страница 31: ...32 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 32: ...33 Base Unit Key PCB ...
Страница 33: ...34 Handset Main PCB ...
Страница 34: ...35 36 WIRING DIAGRAMS Base Unit ...
Страница 35: ...37 Handset ...
Страница 38: ...40 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 60: ......