Sony CDX-C90 Service Manual page 68

IC1 CXD8679Q (MAIN BOARD)
51 50 49
IF SELD 52
IF SELC 53
NC 54
SBCKI 55 ATT
4BIT DATA
SDATAR 56
IIR
BITSTREAM
SDATAL 57
NC 58
DFDTOL 59
FIR 1
DFBCKO 60
OVERFLOW DETECTOR
DFDTEN 61
TEST1 62
TEST2 63
VSS 64
1 2 3
IC3, 4 PCM1702U-J (MAIN BOARD)
INPUT
DATA 1
INTERFACE
&
2
CLOCK
SINE CONVERTER
CIRCUIT
3
NC
+VDD 4
BALANCED
5 CURRENT
D.COM
SEGMENT
6 DAC A
–VDD
7
L.E
NC 8
9
NC
10
NC
48 47 46 45 44
S / P
MODE
FIR 4
FIR 2 FIR 3
P/S CONVERT
&
D/F-CLK GEN.
DATA SELECT
4 5 6 7 8
20 –VCC
REFERENCE
19 REF DC
&
SERVO CIRCUIT
18 NC
17 SERVO DC
BALANCED
BY-POLR
CURRENT 16 A.COM
OFFSET
SEGMENT
CIRCUIT
DAC B 15 A.COM
14 I OUT
13 NC
12 BPO DC
11 +VCC
42 40 39
43 41
TIMING
CIRCUIT
ATT
IIR
FIR 4
FIR 1 FIR 2 FIR 3
OVERFLOW DETECTOR
2
9 10 11 12 13
ZCEN
CS
SDATAI
VD+
DGND
SCLK
SDATAO
MUTE
– 93 –
38 37 36 35 34
OR
"0" DETECT
MUTE
CIRCUIT
3rd order
L . I . P.
NOISE
SHAPER
ATT
x 0.75
DITHER
ATT
x 0.75
3rd order
L . I . P.
NOISE
SHAPER
POLALITY
CLOCK
GENERATOR
DATA SELECT
14 15 16 17 18
IC103, 104 CS3310-KSR
MUX
+
–
1
8
8
2
CONTROL
3
REGISTER
4
16
5
SERIAL
6 PARALLEL 8 8 8
REGISTER
7
8
MUX
33
32 INAF
31
OVFLAG
30 MUTER
29 MUTEL
28 MTPOL
27
DRPOL
26 MODE
25 NC
24
DFDTOR
23 DFLRCKO
22 TEST4
21 TEST3
20
VSS
19
16
AINL
15
AGNDL
14 AOUTL
13 VA–
12 VA+
11 AOUTR
10
AGNDR
9 AINR