Read Panasonic KX-NT511PRUW / KX-NT511PRUB (serv.man2) Service Manual Supplement online
6
KX-NT511PRUW/KX-NT511PRUB
2. Handset call
Transmitting signal is input from handset microphone → input to IC1302-F14, E14
→ A/D conversion, Gain adjustment by a built-in DSP of IC302.
Receiving signal input from IP Line → Gain adjustment and D/A conversion by DSP of IC302
→ IC302-F12, G12 output from → output to handset speaker.
AGND
AGND
C381
C382
IC302
F12
G12
Handset
Jack
R314
C348
R317
R316
C356
C351 R311
R312
C352
R313
AGND
AGND
AGND
MICBIAS
C353
C354
C357
C358
D301
D302
HS_MICP
HS_MICM
C355
CL-HS_MICP
CL-HS_MICM
R315
C391
C392
AGND
D
N
G
A
D
N
G
A
D
N
G
A
D
N
G
A
D
N
G
A
D
N
G
A
D309
D310
L310
L311
AGND
AGND
L306
L305
AGND
AGND
AGND
AGND
C359
NC
C360
NC
C361
330p
D303
D4ED18R00008
D304
D4ED18R00008
HS_SPP
HS_SPM
CL-HS_SPP
CL-HS_SPM
E14
F14
1.2.2.5 Key Circuit
The key data is under the matrix control by IC302.
The key information output from LED_STB is input into KEYIN, when the key is pressed.
The HOOK key is independent from Key Scan Matrix and taken into the port singularly.
[Ope PCB]
MIP
SPP
SPN
KEYIN[2]
KEYIN[0]
KEYIN[1]
KEYIN[4]
KEYIN[3]
KEYOUT[4]
KEYOUT[3]
KEYOUT[2]
KEYOUT[1]
KEYOUT[0]
KEYOUT[3]
KEYOUT[2]
KEYOUT[1]
KEYOUT[0]
*
12
9
12
1
12
REDIAL
12
0
12
7
12
#
12
5
12
3
12
8
12
6
12
4
12
2
12
ICM
12
FLASH
12
MUTE
12
CONF
12
TRANSFER
12
HOLD
12
SP-PHONE
12
FF1
12
FF2
12
FF3
12
UP
12
DOWN
12
KEYIN[5]
OPE_3.3V
SW1
HOOK SW
1
2
2
3
4
5
5
6
R405
IC302
R8
P8
P8
M8
P7
L8
N8
R7
M7
P6
P9
N7
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