Read Panasonic KX-TCA385RU Service Manual online
15
KX-TCA385RU
4.2.14.
RX Audio Path
Receiver
Burst data is input from RF cricuit to IC1.
In IC1, the burst data is converted to ADPCM, then to analog signal, and sent from pin 21 (HSSPOUTP) and pin 22 (LOUT) to
the receiver.
In IC1, the burst data is converted to ADPCM, then to analog signal, and sent from pin 21 (HSSPOUTP) and pin 22 (LOUT) to
the receiver.
Speakerphone
In Speakerphone mode, an audio signal from pin 18 (SPOUTP) and 20(SPOUTN) of IC1 is sent to a monitor speaker.
CHG_CUR
COUNT
ALM
ALM
GND
C302
C301
C300
GNDA
GNDA
C10
C12
GND
BATTERY
C304
C303
L2
GNDA
C4
VCCA
C23
R7
R6
C6
(1608)
C14
(1608)
C19 (1608)
R8
R9
DOUT3.0V
RA300
1
2
3
4
C9
C2
(1608)
C21
(1608)
IC1
1
DOUBCAPP2
2
DOUBCAPN1
18
SPOUTP
3
DOUBCAPP1
4
DOUT3V0
5
DOUT4V5
6
DOUT2V5/DCIN0/LIN0
7
LEDSINK2/DCIN1
8
DCIN2
19
VCCPA
20
SPOUTN
21
HSSPOUTP
22
LOUT
23
PWM0
24
DCINS
25
XOUT
38
TEST
39
RX_SW
40
LNA_INN
69
GND
9
DCIN3/LIN1
10
LEDSINK1/PWM1
11
VREF
12
VCCA
13
MIN
14
MIP
15
HSMIN
16
HSMIP
26
XIN
27
VDD_APU
28
VBAT_APU
29
VDD_IF
30
VCC_FE_IF
31
VCC_PA
32
BAL_OUT2
33
BAL_OUT1
41
LNA_INP
42
ATST_N
43
ATST_P/EXT_LNA
44
RSTN
45
VCC_VCO
46
ON_OFF
47
ON_OFF_OUT
48
IF_T_DATA
49
IF_MLSE
50
IF_RX1
51
IF_
NPORST
53 IF_INT_ANA
54 IF_EN_DA
55 IF_EN_AD
56 IF_DATA_DA
57 IF_DATA_AD
58 IF_CLK_PLL
59 IF_CLK_IF
60 IF_CDC_DIR
61 IF_CDC_DAT_DA
62 IF_CDC_DAT_AD
63 IF_BAT_OK
64 VDD_ADIF
65 VDDCORE
66 COREOUT
67 VBAT
68 DOUBCAPN2
36
GND_RF
37
ANT2
17
MPWR
34
TX_SW
35
ANT1
52 IF_NARES
1u
C308
C309
T_3.0V
SW1
2
1
1
5
4
3
C13
(1608)
C40
L22
L1
22u
C57
0
2
3
4
5
3
4
5
D3V
VBG
CHG_DET
VIB_CTRL
VIB_CTRL
C326
C313
D301
D300
GND
GND
C328
GND GND
C327
C314
C16
GND
GND
VBAT_3.0V
VBAT_3.0V
GNDA
GNDA1
GNDA1
GNDA
SPP
SPM
MIC+
MIC-
GNDA
GND GND
GND
GND
GND
C330
C329
C17
R14
R301
R305
R304
D302
D303
C315
(1608)
C15
C18
R306
C310
(2125)
MIC
AP1
1
2
C331
C311
C312
C323
C324
C54
X1
1
2
4
3
RA301
33 1
2
3
4
C59
C60
L300
L301
L304
L305
D304
D305
GND
GND
REV-
REV+
L21
ZA4
5
3
4
2
1
ZA5
5
3
4
4
2
1
1
ZA2
5
3
4
2
1
ZA3
5
3
4
4
2
1
1
MIC POWER
RECEIVER+
RECEIVER-
Speakerphone_SP+
Speakerphone_SP-
MIC+
MIC-
Speaker
Reciver
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