Sony CDX-C90 Service Manual page 62

QQ
3 7 63 1515 0
• IC Block Diagrams
IC1 CXA1791N-T4 (SERVO BOARD)
1
LD
APC
PD AMP
+
–
2
PD
3
PD1 –
+
VC
RF
IV AMP1
PD2 4
–
+
VC
RF
IV AMP2
GND 5
F 6
–
+
VC
F
IV AMP
E 7
–
+
VC
E
IV AMP
VR 8
TE
L 13942296513
9 VC
VC
10
NC
www
.
http://www.xiaoyu163.com
VC
APC
VREF
LD AMP
1.25V
+
VCC
–
VC
–
+
VC
SUMMING AMP
VC
–
+
ERROR AMP
VC
VC
–
+
VC
ERROR AMP
VCC
VC BUFFER
IC2 CXD2522R-T6
47 45 44
48 46
CPU I/F
XEMP 49
50
XWIH
ADDRESS MONITOR
AM4 51
AM3
52
AM2 53
WRITE
54
AM1
55
AM0
COUNTER
VDD 56
57
XQOK
READ
BASE
COUNTER
GSCR 58
SCOR
59
NC
60
DATA
LINKING
NC 61
CONTROL
NC
62
x ao
GRST
63
y
XRST
64
i
1 2 3 4 5 6
http://www.xiaoyu163.com
8
IC6 LB1638MTP-T1
GND 1
2
IN1
20 VCC
19 APC ON
VCC 3
18 RFI
IN2 4
17 RFO
RF GND 5
16 FE
FOCUS
IC551 LC89170M-TLM
15 FE BIAS
14 TE
EXCK
1
TRACKING
13 EI
SBSO 2
12 EO
3
SCOR
WFCK 4
Q Q
3 6 7 1 3
5
MCK
11 NC
6
XMODE
GND 7
43 42 39
41 40
VWA
BASE
DSP
I/F
u163
.
7 8 9 10 11 12 13 14
– 91 –
2 9 9 4 2 8
10 N.C.
9 OUT1
8 VS
7
OUT2
6 N.C.
CPU INTERFACE
32 WORD X 8 BIT CRC
DUAL PORT RAM CHECKER
1 5 0 5 8 2 9 9 4
TIMING
&
SYNCHRONIZATION
SIGNAL
PROTECTION
38 37 35 33
36 34
32
XCAS
31
D4
30 D3
29
D0
28 D1
DRAM 27 XWE
I/F
26 XRAS
25 A9
24 VDD
23 A0
22
A1
21
A2
20
A3
SELECTOR
TIMING
19 C176
GEN.
m
co
DAC DIGITAL
18
DOUT
I/F
OUT
17
LRCK
15 16
9 9
VDD
14 VDD
13
DQSY
12 SRDT
11 SCLK
2 8 9 9
10
SW2
9 SW1
8 TEST