Block Diagram - Main Section - Sony MDX-C7900 Service Manual

5-2. BLOCK DIAGRAM – MAIN Section –
DADT 5
6
A
LEVEL
BCK 3 4
SHIFT
(Page 4)
LRCK 1 2
IC204
COUNTER
AMPI CKO
PD
PHASE SELECTOR
4
REF 2 10
1 COMPARATOR & VCO
DIGITAL AUDIO PLL
IC200
FS256
BCK, LRCK, FS256
B
(Page 4)
CNP300 (1/2)
(L)
(R) R-CH
FM B+ AM B+
BUS AUDIO IN
J1
8 10
(FM/AM ANTENNA)
2 FM-ANT
1 AM-ANT
4 6 21 11 5
(C7900R)
AM B+
LOW-PASS
FILTER
Q4
+
IC103
LOW-PASS FILTER
SWITCHING
9 16 15 11 13 18
FM/AM PLL
IC100
1 20 6 5 4 2
X1
7.2MHz
9 10 11 85
LOCK
C 58 LOCK IN
(Page 4)
05
DIGITAL D-BASS CONTROL
IC201
DI DOUT
3 9
INPUT DIGITAL OUTPUT
BCKI
BCKO
2 INTERFACE SIGNAL INTERFACE 10
LRCI
LRCO
CIRCUIT PROCESSOR CIRCUIT
1 11
SEQUENTIAL
CONTROL
SYSTEM
CLK
4 CLOCK
MODE
CONTROL
14 15 16
D3
9
FM-L-CH 18
FM-R-CH 16
R-CH
MUTING
FM/AM TUNER UNIT Q101
TU1
R-CH
AM
12
DET
13 20 22 19 23
MUTING
Q100
MUTING
AF SEEK
CONTROL SWITCH
SWITCHING
Q103
Q5
RDS SIGNAL
BUFFER
Q50
RV1
SIGNAL
METER
RV1
SIGNAL
METER BUFFER
Q1
65 82 83 81 53 62
MASTER CONTROLLER
IC700 (1/3)
– 23 –
DIGITAL FILTER,
D/A CONVERTER
IC202
DATA VOUTL
5
BCK 12
INPUT DIGITAL NOISE
6
D/A
INTERFACE FILTER SHAPER
LRCK
CONVERTER
4
VOUTR
9
ZERO
7
XTI CLK
1
MODE
CONTROL
CONTROL
18 17
L3 (MD-L)
LVR
36 LT LS
L4 (AUX-L)
LSELO
IN
OUT IN
35
INPUT VOLUME
L2 (FM-L) 34 33 28 27
37 SELECTOR CONTROL
L1 (AM-L)
38
SHIFT
COMMAND REGISTER
DECODER
ELECTRICAL VOLUME
& LATCH
IC300
R-CH
(C7900R)
B+ SWITCH
BACKUP +5V
Q51
FM B+
14 7
RDS DECODER
IC102
SIGNAL
QUALITY
DECODER
SC
57 kHz OUT RDS/RDBS
CIN
CLOCKED
16 BAND-PASS 18 19 DEMODULATOR
COMPARATOR
MPX
FILTER & DECODER
MULTI
OSCILLATOR
LVIN
20 PATH 2
& CLOCK
DETECTOR
5 4 8
X2
4.332MHz
52 67
• SIGNAL PATH
LOW-PASS
FILTER
IC203
MUTING
R-CH
Q991
R-CH
MUTING
CONTROL SWITCH
Q903
MUTING
R-CH
Q301
R-CH
MUTING
Q300
R-CH
LF
LS LT
OUT
OUT IN 21 12
TONE FADER
23 22
CONTROL CONTROL 20
LR
MUTING
OUT
Q302
R-CH 14
CONTROL
R-CH
17 16 18
11
MUTING
Q303
R-CH
15
R-CH
MUTING
CONTROL SWITCH
5
Q700
4
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
9 10
70 71 26 27 41 31 16 59 60
– 24 –
MDX-C7900/C7900R
: MD PLAY
: FM
: AM (MW)
CNP300 (2/2)
(L)
FRONT
LINE OUT
(R)
(L)
REAR
LINE OUT
R-CH (R)
POWER AMP
IC500
CNP500 (1/2)
1
FL+ 5 FRONT L (+)
FL-IN
9
FL– 3 FRONT L (–)
4
FR+ 21 FRONT R (+)
FR-IN
12
FR– 23 FRONT R (–)
2
RL+ 9 REAR L (+)
RL-IN
10
RL– 7 REAR L (–)
3
RR+ 17 REAR R (+)
RR-IN
11
RR– 19 REAR R (–)
22 4
13
TEL ATT
15
TEST
LEVEL
14
SHIFT ILL IN
Q500
55 56 80 32 57