— 13 —
TROUBLESHOOTING HINTS
1. The bell does not ring.
When the PAGE SW of the
base is pressed, does the
ringer on the handset ring?
See 2. The bell does not ring
& page does not ring.
When the TEL SG is joined
with the base to make bell
signal, is there pulse wave
on Pin 4 of IC3?
By using voltage chart,
check IC3.
IC3 is defective.
Check TEL network
primary circuit.
NG
OK
NG
NG
OK
OK
Then, is there pulse wave
on Pin30 of IC2?
Check IC2, R30 and R48.
IC2 is defective.
By using voltage chart,
check IC2.
Check the surrounding
circuit where the
voltage is incorrect.
NG
OK
OK
NG
Содержание FT-7807R
Страница 1: ...CORDLESS TELEPHONE SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FT 7807R FILE NO 2B0 9803 ...
Страница 8: ... 7 ...
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Страница 10: ... 9 10 SCHEMATIC DIAGRAMS TEST POINT RF TEST POINT RX VCO TEST POINT TX VCO TEST POINT Discriminator ...
Страница 11: ... 11 12 TEST POINT RF TEST POINT RX VCO TEST POINT Discriminator TEST POINT TX VCO ...
Страница 26: ... 27 ...
Страница 27: ... 28 ...
Страница 28: ... 29 ...
Страница 29: ... 30 EXPLODED VIEW AND MECHANICAL PARTS LIST Base Unit ...
Страница 31: ... 32 Handset ...
Страница 52: ...MECHANICAL PARTS LIST ...
