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HCD-ZT4
7-15. SCHEMATIC DIAGRAM - MAIN Board (1/4) -
1
2
3
4
MAIN BOARD
(1/4)
A
CN490
11P
CHASSIS GND
1
PGND
2
DMPORT+5V
3
DMPORT-L
AB
L
4
AGND
5
B
DMPORT-R
DMPORT
R
6
BOARD
CN1301
A+9V
7
(Page 34)
57
DET A/D
8
32
TXD
9
31
RXD
10
11
DGND
C
JR123
0.1
R225
6.8k
JL253
R223
2.2k
ST-L
1
ST-L
ANTENNA
JL254
R226
6.8k
ST+9V
2.2k
JL255
R224
ST-R
ST-R
FM 75
D
JL256
GND
COAXIAL
FFC220
JL257
TUNED
61
TUNER
(FM/AM)
JL258
63
ST-CE
AM
JL259
65
ST-DIN
JL260
66
ST-CLK
9
JL261
ST-DOUT
67
E
F
G
H
CN470
8P
JL264
A+9V
1
JL265
MIC SIGNAL
2
JL266
A
MIC GND
3
JL267
AUX-L
4
JL268
MIC
AGND
5
BOARD
JL269
NO700
AUX-R
6
I
JL270
(Page 42)
AGND
7
JL271
HP/MIC DET
8
CN450
9P
C471
0.1
JL275
A+9V
1
JL276
PB-LCH
2
JL277
PB-RCH
3
B
JL278
A-GND
4
J
JL279
REC-LCH
5
JL280
TC
REC-RCH
6
BOARD
JL281
(Page 31)
M-GND
7
JL282
M+9V
8
JL283
TP-STATE
9
K
HCD-ZT4
• See page 50 for IC Block Diagrams.
5
6
7
8
4.4
R138
47k
4.4
R128
15k
R122
100
Q128
C123
4.4
2SC3052EF-T1-LEF
10
R121
100
BASS AGC
50V
R177
R188
1.5k
47k
R127
1.5k
R178
15k
C127
0.1
C179
2.2
C128
50V
4.4
0.1
2SC3052EF-T1-LEF
BASS AGC
27
23
22
21
19
18
17
16
15
28
26
25
24
20
C129
2.2
50V
4.4
VOLINL
29
BASS2R
14
C131
4.4
10
TONEOUTL
R132
30
BASS1R
13
50V
4.7k
C132
0.047
4.4
31
BASS2L
MID2R
12
4.4
R133
32
BASS1L
11
MID1R
C133
0.022
4.7k
4.4
33
MID2L
IC407
TRER
10
4.4
C135
MID1L
34
SA2
9
0.01
4.4
INPUT SELECTOR,
C134
0.01
35
TREL
ELECTRICAL VOLUME
SA1
8
4.4
IC407
36
RECBL
7
RECBR
R2A15216FP
4.4
37
RECAL
6
RECAR
R136
R137
C137
2.7k
10k
38
INGAINOUTL
INGAINOUTR
5
10
50V
GAMEL
39
GAMER
4
C141
10
40
INFL
INFR
3
50V
4.4
41
DMPORT-L
2
DMPORT-R
R131
4.4
10k
42
AUX-L
1
AUX-R
C142
10
50V
IC B/D
43 44 45 46 47 48 49 50 51 52 53 54 55 56
C143
C193
10
10
50V
50V
C144
C145
10
10
C195
C194
50V
50V
10
10
50V
50V
R195
1.5k
C154
R185
220
10k
10V
C147
C149
0.47
100
50V
10V
Q681, 684
B+ SWITCH
Q681
RT1N431C-TP-1
R683
R681
1k
10k
0
3.3
Q684
8.3
KTA1271Y-AT
9
9
9
10
11
12
R129
2.2k
R179
2.2k
R192
56k
R203
470
C209
C206
C242
1000p
470p
470p
C258
C256
C259
C180
47
470p
10
4.7
16V
50V
50V
R258
27k
IC251
4.4
LINE AMP
IC251
NJM4558V-TE2
4.4
R263
470
4.4
GND
Q178
5
4
4.4
4.4
6
3
4.4
4.4
C181
7
2
C182
R182
10
0.047
4.7k
50V
4.4
8.9
4.4
8
1
VCC
4.4
C184
0.022
4.4
R183
4.7k
C293
R201
47k
4.4
1
4.4
C183
0.01
C185
0.01
C139
2.2
50V
4.4
R108
10k
R111
100k
4.4
C109
10
50V
4.4
R187
R186
C187
10k
2.7k
10
50V
Q115
2SC3052EF-T1-LEF
C191
10
50V
4.4
R181
4.4
10k
R113
1.8k
R119
Q116
100
2SC3052EF-T1-LEF
C118
Q115, 116
2.2
BAND-PASS FILTER
50V
R200
R116
C192
22
100
10
D116
R191
50V
MC2837
2.7k
C148
100
10V
36
36
13
14
15
16
C280
0.1
C294
0.015
R271
R221
470
470
C218
C270
C221
C220
C282
47
47
100p
47
C225
0.068
16V
16V
16V
C271
C275
100
100p
1000p
10V
R208
R270
R220
R280
IC252
27k
8.2k
8.2k
5.6k
LINE AMP
IC252
C272
NJM4558V-TE2
C281
47p
8p
4.4
GND
5
4
C222
47p
4.4
4.4
6
3
C273
22p
R272
4.4
4.4
7
2
22k
C223
22p
8.9
4.4
8
1
VCC
R222
22k
R283
6.8k
C243
C224
C274
1
2.2
2.2
50V
50V
Q452
Q402, 452
R228
R110
R278
2SC3052EF-T1-LEF
MUTING
1k
100k
1k
0
R257
47k
2.9
R114
Q402
680
2SC3052EF-T1-LEF
R279
C117
2.2k
R229
470p
2.2k
R112
470
2.9
R207
47k
0
R227
47k
R277
47k
R276
47k
(GT444/GT555)
C101
22
C277
50V
C227
2.2
2.2
50V
50V
R670
2.2k
Q670
RT1P141C-TP-1
MUTING CONTROL
R117
15k
C102
4.7
50V
17
18
19
ET601
C241
ET602
1000p
C648
220p
(CHASSIS)
C647
220p
C284
R286
100
47k
R282
10V
100k
R285
47k
IC253
LINE AMP
R292
C291
IC253
10k
0.068
NJM4558V-TE2
4.3
GND
5
4
4.3
4.4
6
3
4.3
4.4
R291
7
2
6.8k
8.9
4.4
8
1
VCC
R284
8.2k
R287
C287
1k
10
50V
C283
0.068
R288
47k
0
R289
2.2k
2.9
Q430
2SC3052EF-T1-LEF
MUTING
R669
470k
1
2
3
11
4
MAIN
BOARD
(3/4)
5
(Page
38)
6
7
8
9
11
12
19
18
17
MAIN
BOARD
16
(2/4)
(Page
15
37)
14
13
12
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