KX-NT366RU (serv.man2) — Panasonic PBX Service Manual (repair manual). Page 10

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10
KX-NT366RU/KX-NT366RU-B
+
-
+-
+
-
+-
+
-
+-
Vref
CC
DET
A3.3V
IC20
1
VOUT1
2
VIN1
3
Bypass
4
GND
5
SHUTDOWN
6
VIN2
7
VOUT2
8
VDD
R339
AG
AG
AG
A3.3V
R320
A3.3V
A3.3V
C327
AG
AG
C343
R327
A3.3V
AG
IC24
1
AO
2
A-
3
A+
4
GND
5
B+
6
B-
7
BO
8
VCC
D3.3V
C324
C333
R314
AG
IC23
1
AO
2
A-
3
A+
4
GND
5
B+
6
B-
7
BO
8
VCC
R310
R319
AG
AG
MUTE_SP0
AG
AG
IC21
1
SHUTDOWN
2
BYPASS
3
+IN
4
-IN
5
Vo1
6
VDD
7
GND
8
Vo2
AG
Q1
E
C
B
R311
R318
AG
IC25
1
AO
2
A-
3
A+
4
GND
5
B+
6
B-
7
BO
8
VCC
C331
R348
AG
AG
MUTE_SP2
R345
AG
AG
AG
A3.3V
R326
MUTE_SP1
R317
C344
R346
C314
A3.3V
AG
R337
A3.3V
R338
C346
MIC_SW
C350
A3.3V
AG
R341
R340
R343
AG
A3.3V
R344
C351
R342
AG
R300
AG
R303
AG
AG
C303
A3.3V
C300
A3.3V
R347
AG
HEADSET
L302
AG
L304
L303
SP1
AG
AG
L301
AG
D8
AG
L305
AG
SP2_2
L306
AG
MIC2_2
AG
L307
C302
C301
R325
Q2
E
C
B
Q3
E
C
B
C339
C355
C325
C356
C309
C340
C311
NC
C305
C358
C353
C338
C354
R350
R349
HD_AG
HS_SP
HD_DET
HD_MIC
HS_MIC-
HD_SP
HS_AG
HS_MIC+
IC29
5
A
1
COM
6
Y2
7
Y1
IC30
5
A
1
COM
6
Y2
7
Y1
IC22
1
2
3
4
5
6
7
8
AG
R301
MIC1+
MIC1-
R322
R323
IC26
9
S2
4
CN
3
C1
5
C0
IC26
11
S0
14
AN
13
A1
12
A0
IC26
10
S1
15
BN
1
B1
2
B0
IC27
9
S2
4
CN
3
C1
5
C0
IC28
9
S2
4
CN
3
C1
5
C0
IC27
11
S0
14
AN
13
A1
12
A0
IC28
11
S0
14
AN
13
A1
12
A0
CN4
1
2
CN5
1
2
R306
R315
R321
R331
C336
C337
R324
R329
C334
C319
C316
C318
NC
C312
C315
C306
C307
C329
C328
R351
L308
L309
MIC3
C367
SP3P
SP3M
C362
C332
C313
R316
L310
C363
C364
C365
C366
R302
R304
R308
R305
R313
R333
R334
R332
R335
R336
C330
C326
R312
R309
C335
C310
C308
R352
R307
C348
C349
C347
C345
C342
C341
C304
C320
C321
R330
R328
C322
C323
to SP
to MIC
to CN1
Handset
to CN1
Headset
L:IC22_ON
H:IC22_OFF
L:Normal
H:G.722
L:OFF H:MUTE
L:OFF
H:MUTE
L:OFF
H:MUTE
L:NC
H:Headset DET
L:Handset
H:Headset
ANALOG CIRCUIT 
G.722
122
120
116
148
105
106
112
121
123
115
MIC_IN
HEADSET
MIC_SW
SP_OUT
MUTE_SP2
MUTE_SP1
MUTE_SP0
HS_IN
HS_OUT
SIDE_TONE
IC1
G.722
HANDSET TX 
HANDSET RX 
HEADSET TX 
HEADSET RX 
SP PHONE TX 
SP PHONE RX 
HANDSET TX 
HANDSET RX 
HEADSET TX 
HEADSET RX 
SP PHONE TX 
SP PHONE RX 
G.711
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