14
2. The bell does not ring & page does not ring.
Can the base and handset be
connected?
Press handset DIAL key
while in TALK MODE,
can key touch sound be
heard from the ringer?
When the PAGE SW S2 of
the base is pressed, does
pin22 of IC3 change from
high to low?
Check IC3 and its peripheral
circuit.
When the key of the handset is
pressed, can the pulse output
at pin 38 of IC502 be seen?
Check RINGER SP501.
Check S2, R58 and R73.
See 3. The base and handset
cannot be connected.
Check IC502.
OK
OK
OK
NG
OK
NG
NG
NG
At the Q505 collector, can the
pulse wave be seen?
OK
Check R565, R586 and Q505.
NG
Summary of Contents for FT-7007LBR
Page 1: ... PUBLISHED IN JAPAN Nov 1998 0 10 2 3 456789 FT 7007LR FT 7007LBR ...
Page 8: ...7 BLOCK DIAGRAMS Base Unit ...
Page 9: ...8 Handset ...
Page 11: ...11 12 Handset RX VCO TEST POINT RF TEST POINT TX VCO TEST POINT DISCRI TEST POINT ...
Page 26: ...27 WIRING DIAGRAM Handset ...
Page 43: ......
