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A
KDC-HD942U
1
ANT.
ELECTRIC UNIT
(X34-6320-10)
W321
TP344
TU GND
FRONT-END
A1
26
1
TP751
RFGND1
2
2
TP752
FM/AM ANT
3
TP753
RFGND2
TP754
4
RF5V
5
TP755
DIGGND
6
TP756
IBOC BLEND
6
7
TP757
IBOC Q
7
8
TP758
IBOC I
8
9
TP759
IBOC WS
9
10
TP760
IBOC BCK
10
TP761
R760
11
DSP INITIAL
100
12
TP762
I2S WS
12
13
TP763
I2C BCK
13
14
TP764
I2C DATA
14
15
TP765
DSPGND1
TP766
R759 100
16
I2S DATA
3
TP767
R758 100
17
I2S CLK
TP768
R757 100
18
RST
19
TP769
VDD1.8V
TP770
20
VDD3.3V
TP771
21
DSPGND2
22
TP772
AUDIO LCH
TUN-L
23
TP773
AUDIO RCH
TUN-R
24
TP774
DSPGND3
25
1
4
1
Q768
HD RADIO
RESET SW
1
IBOC BLEND
5
R857
0 or 3.3V
TP846
C851
1K
2
NC
TP850
3
0.01
NC
4
Q768
TP831
TOOL 1
5
TP830
TOOL 0
6
RESET
R874 22K
0V
7
NC
R875 22K
0V
8
NC
9
TP841
FLMD 0
10
X2
11
X1
12
X851
REGC
13
20MHz
VSS
14
EVSS
15
0V
VDD
16
6
EVDD
3.3V
1
1
7
28
X34-6320-10 (1/4)
B
INTERNAL CIRCUIT
of X17-2050-10
3/3
A2
(X17-2050-10)
21
GND7
GND1
20
GND6
19
GND5
VDD3.3V
VDD1.2V
GND2
BELEND
L753
IIS DATA
1uH
IIS WS
RF5V
W756
IIS BCK
IBOC Q
IBOC I
IBOC WS
IBOC BCK
GND3
RESET EVM
49
IBOC SDA
IBOC SCK
21
OSC1.2V
7
SDA
SCL
22
GND4
50
21
HD1.8V
L752
HD3.3V
22
7
1
1
22
61
0 or 3.3V
3.3V
0V
3.3V
0V
3.3V
0V
IC851
HD u-COM
20MHz
2.5V
5V
0V
TP843
TP842
35
2
TP838
D5V
BU3.3V
C
HD FRONT-END
1
TP801
L801
600
2
TP802
L802
3
TP803
600
4
TP804
R807
TP805
5
6
100
6
TP806
14
7
TP807
12
8
TP808
13
9
TP809
7
10
TP810
8
11
TP811
9
12
TP812
10
21
13
TP813
R801 100
14
TP814
54
R802
R905
TP815
TP852
100
0
15
SDA
6
TP816
TP853
R803
R906
16
SCL
21
100
0
L803
TP817
17
600
22
18
TP818
21
RF5V
6
22
6
3
7
22
3.3V
0V
0V
48
AVSS
47
AVREF
46
3.3V
NC
3.3V
45
0V
NC
44
R862
NC
TP832
100
43
TERMINAL TX
0V
TP833
R863
42
TERMINAL RX
41
100
R864
NC
40
TP829
22K
NC
3.3V
Q766
0V
39
MUTE
38
TP847
RESERVED 1
37
R872
TP848
0V
RESERVED 0
22K
36
PHY SEL
3.3V
R873 22K
35
PROTOCOL SEL
TP844
3.3V
R870
34
0V
P.CON
18K
R871
33
BU DET
33K
1
D
R
REAR
PRE OUT
FRONT
SUB
SUB
FRONT
R403
R404
R409
R410
22K
22K
22K
22K
Q401
Q402
Q403
Q404
Q401-406
Q407
PRE-OUT
MUTE SW
10
Q407
PRE-OUT
MUTE
12
DRIVER
BU5V
TP73
TP78
RF5V REG
R83
10
A8V
1/2W
8.0V
5V
0V
IC75
3.3V
0V
A8V
TP79
TP81
TP85
3
E2PROM
IC852
0V
5
4
SDA
SDA
VSS
6
3
SCL
SCL
E2
7
2
3.3V
WC
3.3V
E1
8
1
0V
VCC
E0
0V
C858
0.01
3
BU3.3V REG
TP76
IC74
5.0V
3.3V
1
5
VOUT
VIN
BU5V
0V
2
VSS
3
4
NC
ON/OFF
88
Q766
HD RADIO
MUTE SW
87
2
2
3
2
1
E
L
J401
REAR
R415
R416
22K
22K
Q405
Q406
Q408
C516
1
POWER
IC
0V
IC500
R
2
A5V
C3
0
11
C3
12
C3
12
11
1
2
3
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