Toshiba FT-3809 BK Service Manual page 19

3. The Base and handset can't connect.
Check whether the
handset and the base
unit are connected.
OK
Check the handset
TX power.
OK
Check the handset
data deviation.
OK
Check the base RX
Sensitivity
Check whether the handset
NG
and the base RX, TX-Loop-
are OK.
OK
Check the base TX Power
OK
Check the base TX data
deviation
OK
Check the handset RX
Sensitivity
OK
Check RX data pulse wave
on RX-DATA
By using voltmeter, Check
NG
the handset TX circuit (HQ1
and HQ3).
At the PIN24 of HU3, Can
NG
the pulse wave be seen.
OK
Check the handset data
circuit (around HU5C)
NG
Check the base RX TEL
OUT.
Check the base RX RF and
mixer circuit (around BQ8).
18
By using voltmeter, check the base &
NG
handset PLL circuit (BU210/HU3and
surrounding circuit of BU10/HU3)
NG
NG
NG
NG
NG
NG
OK
By using voltmeter, check
the base TX circuit.
By using voltmeter, check
BU5 and BU6
Check the handset RX RF
circuit (HU1) as well as
HQ2 .
Check HU5B
and surrounding circuit of
Check HU3 circuit.
Alignment the BC99 and
by using voltmeter, check
BU1