17
KX-TS620BX1
8.1.5.
Check SP-phone Voice Transmission
Cross Reference:
Note:
BBIC is IC901.
8.1.6.
Check SP-phone Voice Reception
Cross Reference:
Note:
BBIC is IC901.
Check MIC, fl
a
t c
ab
le connection, R932,
R934, C937.
Check OGM Record in
S
i
g
nal Route.
Check BBIC.
Check
S
P-phone TX in
S
i
g
nal Route.
Check
On/Off Hook Circuit.
Input sign
a
l 1.0kHz/-50dBm to the microphone of
BA
S
E UNIT
a
nd
S
P-PHONE on.
Is there sign
a
l
a
t BBIC (114)?
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.
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
Check
On/Off Hook Circuit.
Input sign
a
l 1.0kHz/-30dBm to Tel Line
a
nd
S
P-PHONE on.
Does the unit c
a
tch line ?
Check
S
P-phone RX in
S
i
g
nal Route.
Check BBIC.
Check IC905, BBIC.
Check
a
round R924, R925, C926~C930.
Is there input sign
a
l
a
t BBIC (102) ?
Is there output sign
a
l
a
t test point TP902 ?
Is IC904 (1) input volt
a
ge high ?
Is there
b
ell ringing sign
a
l
a
t IC904 (5,
8
) ?
Check spe
a
ker
a
nd C925.
YE
S
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
NO
