HCD-M90
3333
6-5. BLOCK DIAGRAM – AUDIO Section –
: TAPE PLAY
: REC
: TUNER (FM/AM)
: DVD/CD PLAY (AUDIO)
87 88 86
89
STK MUTE
50
H/P DETECT
81
LINE MUTE
K
TU-L
(Page 32)
L
TC-L
(Page 32)
J
DVD-L
(Page 31)
M
REC-L
(Page 32)
INPUT SELECT SWITCH,
ELECTRICAL VOLUME,
TONE CONTROL
POWER ON
MUTING
Q330
MUTING
CONTROL SWITCH
Q312, 313
3
COM +12V
D309
MUTING
Q408, 409
MUTING
Q100
4
10
14
+
+
–
–
SJ301
L
R
SPEAKER
IMPEDANCE
USE 6 – 16Ω
R-CH
R-CH
J301
HEADPHONE AMP
IC324
MOS GAIN &
LEVEL SHIFT
ING STAGE
MOS
OUTPUT
STAGE
SHORT
CIRCUIT
PROTECTION
IN+
IN+
MUT
STANDBY/MUTE
MUTE STBY
POWER AMP
IC101 (SUFFIX-14) IC101 (SUFFIX-16)
R-CH
OUT
R-CH
R-CH
DC DETECT
Q310, 311
PHONES
100
DC DETECT
R-CH
INPUT
SELECT
SWITCH
L4
L3
L1
L2
11
12
14
13
9
LIN
10
LSELO
5
LOUT
VOLUME
CONTROL
TONE
CONTROL
30
1
DI
CL
2
CE
CPU
INTERFACE
R-CH
SJ302
L
R
AUDIO IN
MD (VIDEO)
9
R-CH
VOL-SDA
AMP SCK
AMP CE
84
STK PWR
SYSTEM CONTROLLER
IC306 (3/4) (SUFFIX-11) IC306 (3/4) (SUFFIX-12)
8 10 4
9 11 3
INVERTER
12 2
13 1
SIGNAL PATH
: MD (VIDEO)
R-CH : R-ch is omitted due to same as L-ch.
IC323 (SUFFIX-14)
IC323 (SUFFIX-16)
IC324 (SUFFIX-14)
IC324 (SUFFIX-16)
IC302 (1/2) (SUFFIX-11)
IC302 (1/2) (SUFFIX-12)
INVERTER
IC302 (2/2) (SUFFIX-11)
IC302 (2/2) (SUFFIX-12)
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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