Read Panasonic KX-HDV430 Service Manual online
10
KX-HDV430 Series
4.2.5.
Analog Circuit
1. Speaker phone call
Transmitting signal is input from microphone MIC1 (differential amplifier circuit)
input to IC101-pin L19, M19 A/D conver-
sion, Gain adjustment and echo cancel by built-in DSP of IC101.
Receiving signal input from IP Line
Receiving signal input from IP Line
Gain adjustment and D/A conversion by DSP of IC101 output from IC101-pin V18,
V19
output to Speaker.
2. Handset call
Transmitting signal is input from handset microphone
input to IC101-pin M17,M18 A/D conversion, Gain adjustment and
echo cancel by built-in DSP of IC101.
Receiving signal input from IP Line
Receiving signal input from IP Line
Gain adjustment and D/A conversion by DSP of IC101 IC101-pinK18,K19 output
to handset speaker.
IC101
AG
C469
AG
C470
L19
M19
V19
V18
L420
L421
C444
NC
NC
R419
2.2k
R423
3.3k
C441
0.1u
10
R421
220
C440
0.1u
10
C442
NC
NC
C443
NC
R420
2.2k
R424
3.3k
C436
NC
NC
R422
220
AG
AG
AG
AG
AG
AG
AG
AG
AG
R418
330
AG
MICBIAS
C437
10u 10
C438
1000p
C439
1000p
50
C432
330p
50
C433
330p
50
D413
D414
CL_MICP
CL_MICM
R401
220
C401
NC
R414
220
MIC401
1
2
DIFFIN1P
DIFFIN1N
SPP
SPM
C429
D411
D412
CL_SPP
CL_SPM
C431
C428
C427
C426
L407
L408
C430
L405
L406
DG
DG
DG
DG
DG
DG
L410
L411
PAOUTP
PAOUTN
IC101
M18
M17
K18
K19
AG
AG
C416
C415
D409
C418
MICBIAS
AG
AG
AG
HS_MICP
AG
AG
AG
R413
C423
AG
R412
R411
HS_MICM
AG
C424
L401
C425
NC
R415
L404
R410
D406
C417
NC
R409
D405
AG
AG
AG
CL_HS_MICP
C414
C413
CL_HS_MICM
C411
AG
R408
C409
C408
C407
D403
DIFFIN0P
DIFFIN0N
D410
D408
D407
AG
AG
AG
C419
C420
AG
AG
HS_SPP
AG
L402
HS_SPM
L403
CL_HS_SPP
CL_HS_SPM
C410
D404
AMPOUT0
AMPOUT1
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