Toshiba FT-3809 BK Service Manual page 20

4. Can't make a phone call (pulse)
Can the base and handset be
connected ?
OK
While in Talk Mode press
dial key of the handset, can
pulse feedback be heard
from the handset receiver.
OK
Check the base TEL-Line
network primary circuit.
5. Can't make a phone call (Tone)
Can the base and handset be
connected ?
OK
While in Talk Mode press dial
key of the handset, At PIN8 of
BU6C of the base can the tone
wave output be seen.
OK
At PIN18 of BU5 of the base
can the Tone wave output be
seen ?
OK
At PIN5 of BT1 of the base,
can the Tone wave output be
seen?
OK
Check the base TEL-Line
network primary circuit.
NG
See 3, the base and handset
can't connect.
NG
By using voltmeter, check
base BU3.
NG See 3, the base and handset
can't connect.
NG
Check around PIN3-8 of
BU5.
Check around PIN18-22 of
NG
BU5 and surrounding
circuit of BU5.
Check the base BD5and
NG
BR4.
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