Read Panasonic KX-NT321RU (serv.man2) Service Manual online
9
KX-NT321RU
+
-
+-
+
-
+-
Vref
CC
DET
HD_SP
HD_MIC
HS_MIC+
HS_SP
HS_MIC-
HD_AG
A3.3V
IC20
1
VOUT1
2
VIN1
3
Bypass
4
GND
5
SHUTDOWN
6
VIN2
7
VOUT2
8
VDD
AG
AG
AG
A3.3V
A3.3V
C327
AG
AG
A3.3V
AG
IC24
1
AO
2
A-
3
A+
4
GND
5
B+
6
B-
7
BO
8
VCC
D3.3V
C324
C333
AG
IC23
1
AO
2
A-
3
A+
4
GND
5
B+
6
B-
7
BO
8
VCC
AG
AG
IC21
1
SHUTDOWN
2
BYPASS
3
+IN
4
-IN
5
Vo1
6
VDD
7
GND
8
Vo2
AG
Q14
E
C
B
AG
C331
AG
AG
AG
AG
A3.3V
MUTE_SP1
A3.3V
AG
C346
MIC_SW
C350
A3.3V
AG
AG
A3.3V
C351
AG
AG
AG
A3.3V
C300
L304
L303
SP1
AG
AG
L301
AG
AG
SP2_2
AG
MIC2_2
C302
C301
C339
C355
C325
C356
C309
C340
C311
C358
C353
C338
C354
IC22
1
2
3
45
6
7
8
AG
MIC1+
MIC1-
IC28
9
S2
4
CN
3
C1
5
C0
IC28
11
S0
14
AN
13
A1
12
A0
CN4
1
2
CN5
1
2
C307
C329
C328
L308
L309
MIC3
SP3P
SP3M
C362
C332
C313
L310
C317
C366
C341
C348
C349
C347
C304
C322
C320
HS_MIC+
HS_SP
JK4
HANDSET JACK
1
2
3
4
HD_SP
HS_AG
JK5
HEADSET JACK
1
2
3
4
5
HS_MIC-
HD_MIC
AG
C321
AG
C323
AG
C334
C326
C344
C343
C312
C303
C337
C335
C306
C318
C367
L302
AG
MUTE_SP2
IC29
5
A
1
COM
6
Y2
7
Y1
Q11
E
C
B
Q13
E
C
B
Q12
E
C
B
AG
C316
Q10
E
C
B
C365
L305
L306
CN8
1
2
3
4
5
6
7
8
9
CN7
1
2
3
4
5
6
7
8
9
C342
C345
R332
R302
R300
R312
R339
R318
R319
R331
R316
R346
R337
R341
R351
R320
R329
R321
R350
R325
R326
R307
R336
R304
R348
R328
R338
R314
R343
R309
R327
R344
R330
R349
R342
R335
R340
R313
R303
R306
R333
R352
R310
R345
R317
R334
R315
to SP
to MIC
H:Normal
L:G.722
L:OFF
H:MUTE
L:OFF
H:MUTE
L:OFF
H:MUTE
L:Handset
H:Headset
IC1
HS_OUT
MIC_SW
120
HS_IN
11
2
G722
135
SP_OUT
11
6
MUTE_SP0
107
MUTE_SP1
106
MUTE_SP2
105
MIC_IN
11
3
11
5
HANDSET
-Rx
HEADSET
-Rx
HANDSET
-Tx
HEADSET
-Tx
SP
PHONE-Rx ( G722 )
SP
PHONE-Rx
SP
PHONE-Tx
ANALOG CIRCUIT
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