18
KX-TS620BX1
8.1.7.
Check Handset Voice Transmission
Cross Reference:
(P.9)
Note:
BBIC is IC901.
8.1.8.
Check Handset Voice Reception
Cross Reference:
(P.9)
Note:
BBIC is IC901.
Input sign
a
l 1.0kHz/-40dBm to the microphone of
HAND
S
ET
a
nd off-hook.
Is there sign
a
l
a
t BBIC (11
8
)?
Is there output sign
a
l
a
t BBIC (100)?
Is there output sign
a
l
a
t
ba
se of Q10
8
?
Is there output sign
a
l
a
t T/R?
Check Tel Cord.
Check H
a
ndset TX in
S
i
g
nal Route.
Check BBIC.
Check H
a
ndset TX in
S
i
g
nal Route.
Check
On/Off Hook Circuit.
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
Input sign
a
l 1.0kHz/-20dBm to Tel Line
a
nd off-
hook.
Does the unit c
a
tch line ?
Is there input sign
a
l
a
t BBIC (102) ?
Is there output sign
a
l
a
t test point TP904 ?
Is there output sign
a
l to CN401 (
S
P+) ?
Check H
a
ndset
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
Check
On/Off Hook Circuit.
Check H
a
ndset RX in
S
i
g
nal Route.
Check BBIC.
Check H
a
ndset RX in
S
i
g
nal Route.
