HCD-HDX275/HDX277WC/HDX279W/HDX475/HDX576WF/HDX675
HCD-HDX275/HDX277WC/HDX279W/HDX475/HDX576WF/HDX675
39
39
6-11. SCHEMATIC DIAGRAM - MAIN Board (4/12) -
• See page 64 for Waveforms. • See page 65 for IC Block Diagrams.
11
.9
6.6
∗
1.6
1.6
1.6
3.3
6.6
4.1
4
4.1
4
3.3
3.3
1.6
3.3
1.6
1.7
3.3
1.7
3.3
3.3
1.7
1.7
1.6
3.3
1.8
1.7
1.6
3.3
3.3
1.7
1.7
3.3
1.7
1.7
1.6
1.6
3.3
1.8
3.3
3.3
3.3
0
0
3.3
3.3
3.3
1.8
3.3
1.3
0
10V
100
C3090
16V
47
C3021
16V
47
C3011
0.1
C3051
10V
220
C3056
16V
100
C3054
16V
220
C3091
5p
C3058
100p
C3083
100p
C3087
100p
C3088
100p
C3094
100p
C3085
100p
C3086
100p
C3084
0.1
C3053
1000p
C3059
0.01
C3055
0.01
C3057
0.1
C3018
0.1
C3030
0.1
C3012
0.1
C3028
0.1
C3027
0.1
C3026
0.1
C3023
0.1
C3022
0.1
C3020
0.1
C3019
0.1
C3017
0.1
C3016
0.1
C3015
0.1
C3014
0.1
C3029
0.1
C3025
0.1
C3024
0.1
C3013
100
R3054
100
R3102
100
R3252
100
R3251
100
R3202
100
R3201
R3152
100
R3151
100
100
R3101
47
R3055
470
R3053
100
R3026
100
R3024
22
R3023
100
R3017
100
R3015
22
R3014
470
R3012
470
R3011
470
R3021
470
R3022
10k
R3013
22k
R3091
22k
R3092
22k
R3093
22k
R3094
33k
R3085
33k
R3086
1M
R3052
1uH
L3054
49.1MHz
X3051
5
4
3
2
1
TK11118CSCL-G
IC3050
RT1P141C-TP-1
Q3081
8
7
6
5
4
3
2
1
NJM4565M(TE2)
IC3001
C3060
10p
JL3004
JL3003
TP3084
TP3083
TP3082
TP3054
TP3030
TP3022
TP3053
TP3015
TP3002
TP3081
TP3136
TP3024
TP3036
TP3026
1
2
3
4
4P
CN3001
HP-R
GND
HP-L
H/P MUTE
D3.3V
A12V
1
C3052
0
R3041
0
R3042
0
R3044
0
R3040
0
R3043
TP3029
TP3131
TP3130
TP3129
100p
C3092
100p
C3093
10k
R3087
10k
R3088
10k
R3090
10k
R3089
33k
R3099
33k
R3098
3.3k
R3095
4.7k
R3096
100k
R3051
C3003
1000p
10V
220
C3082
10V
220
C3081
C3008
0.1
1
2
3
4
4P
CN904
P-GND
P-GND
+31.5V
+31.5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25 26 27 28 29 30 31 32 33 34 35 36
37
38
39
40
41
42
43
44
45
46
47
48
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25 26 27 28 29 30 31 32 33 34 35 36
37
38
39
40
41
42
43
44
45
46
47
48
R3056
0
10uH
L3053
10uH
L3051
L3052
10uH
8
7
6
5
4
3
2
1
TC7WHU04FK(T5RSOYF
IC3051
0
R3050
Bup3.3V
R3049
0
R3047
10k
HPMUTE
SC_DT
PGMUTE
INIT
SOFTMUTE
SCSHIFT
SC_DT
PGMUTE
SCSHIFT
SOLA
TCH1
SOFTMUTE
INIT
SOLA
TCH2
OVF
+1.8V REGULATOR
IC3050
OSC BUFFER
IC3051
IC3001
HEADPHONE AMP
23
13
14
15
19
20
21
18
16
22
17
39
34
38
37
42
41
35
31
32
33
30
40
36
(4/12)
MAIN BOARD
MUTING CONTROL
(HDX279W/HDX576WF)
HDX275/HDX277WC
HDX475/HDX675
6
4
B
E
G
15
F
2
J
A
1
3
10
8
C
H
D
7
I
13
9
12
14
11
5