Sony MDX-C7900, Service Manual

Page: 21 / 62

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MDX-C7900/C7900R
5-2. BLOCK DIAGRAM – MAIN Section –
MUTING
Q991
B+ SWITCH
Q51
MUTING
CONTROL SWITCH
Q903
LOW-PASS
FILTER
IC203
35
36
37
L3 (MD-L)
L4 (AUX-L)
L2 (FM-L)
38
L1 (AM-L)
1
4
2 FM-ANT
AM-ANT
6
VCO
FM +B AM +B
+B
21
FM-IF
11
AM-IF
5
8 10 9
9 16 11 13
6 1 5 20 4 2
9 10 11 85
18
VT
DOUT DIN
CLK
XI
XO CE
PLL SI
58 LOCK IN
PLL SO
PLL CKO
PLL CE
65
AF SEEK
82 53
S METER (VSM)
83
SD IN
81
ST IN/MONO
62
TU ATT
26
VOL SO
27
VOL CKO
41
VOL CE
31
DBMOD1
16
DBMOD2
59
EMPH O
52
MPDH (MTP)
FM OSC
15
AM OSC
SEEK
IF
PD
13
SEEK
70
RDS SI
71
RDS CKI
67
DAVN
19
S-METER
20
SD
22
18
16
12
ST/MONO
23
FM-DET
FM-L-CH
FM-R-CH
AM
DET
VOLUME
CONTROL
INPUT
SELECTOR
TONE
CONTROL
33 27 28
LVR
IN
LS
IN LT
OUT
COMMAND
34
LSELO
22 23
LT
IN
FL-IN
FRONT L (+)
FRONT L (–)
FRONT R (+)
FRONT R (–)
REAR L (+)
REAR L (–)
REAR R (+)
REAR R (–)
FL+
1
9
4
12
2
10
3
11
FL–
FR+
FR–
RL+
RL–
RR+
RR–
FR-IN
RL-IN
RR-IN
LS
OUT FADER
CONTROL
CONTROL
SHIFT
REGISTER
& LATCH
DECODER
21
LF
OUT
20
17 16 18
LR
OUT
DI CL CE
MUTE ST-BY
DATA
CLK
CE
DATA
CLK
CE
LOW-PASS
FILTER
Q4
AF SEEK
SWITCHING
Q5
X1
7.2MHz
FM/AM PLL
IC100
05
B
(Page 4)
(L)
(R)
R-CH
BCK, LRCK, FS256
BCK, LRCK
FS256
• SIGNAL PATH
: MD PLAY
: FM
: AM (MW)
NOISE
SHAPER
INPUT
INTERFACE
D/A
CONVERTER
MODE
CONTROL
CLK
CONTROL
DIGITAL FILTER,
D/A CONVERTER
IC202
12
9
12
5
3
11
VOUTL
VOUTR
R-CH
R-CH
14 R-CH
15
MUTING
Q101
MUTING
Q100
MUTING
CONTROL SWITCH
Q103
R-CH
60
AU ATT
55
AMP ATT
56 80
AMP ON
32 57
ILL IN
MUTING
Q302
MUTING
CONTROL SWITCH
Q700
R-CH
R-CH
POWER AMP
IC500
R-CH
MUTING
Q303
LEVEL
SHIFT
Q500
R-CH
MUTING
Q301
R-CH
MUTING
Q300
R-CH
R-CH
6
5
4
1
7
18 17
DATA
BCK
LRCK
ZERO
XTI
MUTE DM2
OUTPUT
INTERFACE
CIRCUIT
DIGITAL
SIGNAL
PROCESSOR
INPUT
INTERFACE
CIRCUIT
LEVEL
SHIFT
IC204
SYSTEM
CLOCK
SELECTOR
& VCO
PHASE
COMPARATOR
COUNTER
SEQUENTIAL
CONTROL
MODE
CONTROL
DIGITAL D-BASS CONTROL
IC201
DIGITAL AUDIO PLL
IC200
10
9
11
DOUT
BCKO
LRCO
2
3
1
DI
5
3
1 BCK
LRCK
6
4
2 BCKI
LRCI
CLK
4
AMPI PD
4 REF
1
C
(Page 4)
LOCK
A
(Page 4)
DADT
2
CKO
10
14
MOD1
15
MOD2
MODE1 EMPH MODE2
MODE1
EMPH
MODE2
16
DB/DS
CNP300 (1/2)
J1
(FM/AM ANTENNA)
FM/AM TUNER UNIT
TU1
AM B+
D3
FM B+
BUS AUDIO IN
(L)
(R)
R-CH
CNP300 (2/2)
CNP500 (1/2)
FRONT
LINE OUT
REAR
LINE OUT
(L)
(R) R-CH
RDS DECODER
IC102
MASTER CONTROLLER
IC700 (1/3)
ELECTRICAL VOLUME
IC300
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
OSCILLATOR
& CLOCK
X2
4.332MHz
4 8 5
OSCI OSCO
10 9
14
SDA
VDDA
7
VDDD
SCL DAVN
RDS SIGNAL
BUFFER
Q50
57 kHz
BAND-PASS
FILTER
CLOCKED
COMPARATOR
RDS/RDBS
DEMODULATOR
& DECODER
SIGNAL
QUALITY
DECODER
16 18 19
MPX
CIN
4
FM B+
5V
5
SC
OUT
MULTI
PATH
DETECTOR
20 2
LVIN MPTH
RV1
RV1
SIGNAL
METER
IC103
LOW-PASS FILTER
SWITCHING
(C7900R)
(C7900R)
AM B+
+
LO/DX
LO/DX
DIGITAL
FILTER
SIGNAL
METER BUFFER
Q1
SEEKOUT
TEL ATT
TESTIN
21
23
9
7
17
19
4 22
TEL ATT
TEST
13
15
ILL IN
14