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Q Q
3 7 6 3 1 5 1 5 0
• IC Block Diagrams – MAIN Board –
IC21 TB2118F (EL)
24 23
22 21
20
19
18
17
+
AMP
VCC
–
+
4BIT SWALLOW
REGULATOR
COUNTER
SEEK/RECP
SEEK/RECP
+
PRESCALLER
12BIT
PHASE
SIG
PROGRAMMABLE
COMPARATOR
COUNTER
40BIT SHIFT
REFERENCE
REGISTER
OSCILLATOR
DIVIDER
18BIT
22BIT
18BIT
ON/OFF
BUFFER
SERIAL
I/O
INTERFACE
PORT
1
2
3 4 5 6
7
8
9
T E
L
1 3 9 4 2 2 9 6 5 1 3
IC331 TDA7462D
PAUSE
DETECT
INPUT
LOUDNESS
VOLUME
GAIN &
SE1L
1
CONTROL
CONTROL
AUTO
CIRCUIT
CIRCUIT
SE1R
2
ZERO
MD+
3
MD–
4
CDL+
5
CDL–
6
COMPANDER
CDR–
7
CDR+
8
PDR
9
PDGND
10
PDL
11
LOUDNESS
SE2L
12
INPUT
CONTROL
SE2R
13
GAIN
CIRCUIT
BEEP
w w w
DIGITAL CONTROL CIRCUIT
CREF
14
IC351 LB1930M-TLM
VCC
1
NC
2
BUFFER
16 15
14 13
IN1
3
CONTROL
CIRCUIT
4
IN2
VDD
BUFFER
S-GND
5
AMP
20BIT
IF COUNTER
OUTPUT
PORT
10
11
12
FRONT
TREBLE/
VOICE BANDPASS
FADER
SOFT
BASS
MUTE
CONTROL
HP
LP
CIRCUIT
FRONT
FADER
REAR
FADER
REAR
FADER
SUBWOOFER
FADER
LP
SUBWOOFER
OUT
SDA
x
a o
IIC
SCL
BUS
.
i
– 29 –
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IC301 CXA2509AQ-T4
10
NC
30
9
OUT1
MOTOR
DRIVE
8
NC
CIRCUIT
7
OUT2
6
P-GND
PBFB2
31
PBRIN2
32
33
PBREF2
PBFIN2
34
VCT
35
PBGND
36
PBFIN1
37
PBREF1
38
PBRIN1
39
PBFB1
40
Q
Q
3
7
IC661 BA3918-V2
28
SE3L
SE3R
27
26
MUTE
25
SDA
24
SCL
23
PAUSE
22
OUT FL
21
OUT FR
1
2 3 4
OUT RL
20
IC751 TDA7384
19
OUT RR
18
SUBOUT+
17
SUBOUT–
u 1 6 3
y
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
VDD
16
POWER
SUPPLY
15
GND
http://www.xiaoyu163.com
2
4
8
9
9
29
28
27
26
25
24
23
22
21
24dB
120µ/70µ
T2
+ –
20
MSMODE
–
+
NR BIAS
MS
19
DRSW
X1
MODE
TAPE/AUX
18
TAPESW
F2
17
INSW
TAPE EQ
16
NC
FWD/RVS
VCT
VCC
15
NC
MS ON/
OFF
+
LPF
+
DETECT
–
14
MSOUT
F3
F1
13
DGND
X1
12
MSTC
11
G1FB
T1
120µ/70µ
24dB
2
3
4 5
6
7
8
9
10
1
6
3
1
5
1
5
0
8
9
REGULATOR
OVER VOLTAGE
PROTECT
–
+
5
6
7
8
9
10
11
m
c o
.
– 30 –
2
8
9
9
2
4
9
8
2
9
9
12
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