Block Diagram - Servo Section - Sony MDX-CA680 Service Manual

4-1. BLOCK DIAGRAM – SERVO Section –
48
OPTICAL PICK-UP BLOCK
(KMS-241C)
I I
1
RF AMP
J
J
2
F
B
C B
I J
D A
A A
4
B
5
I-V
C
E
6 AMP
D
DETECTOR
7
C
D
E E
8
I-V
F
F
AMP
9
AUTOMATIC
ILCC APC LD/PD
POWER CONTROL
11
AMP
Q302
PD LD
LASER DIODE
RM PD
10
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC303
16
PSB
SPFD
OUT4F IN4R
6 3
M901 M M
SPRD
(SPINDLE)
8 OUT4R IN4F 4
27 OUT2F IN2F 29
M902
M
(SLED)
25 OUT2R IN2R 30
2-AXIS
DEVICE
FCS+
21 OUT1F IN1F 19
23 OUT1R IN1R 18
FCS–
TRK+
12 OUT3F IN3F 14
TRK–
10 OUT3R IN3R 15
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER
IC301 (1/2)
47
RF AMP,
FOCUS/TRACKING ERROR AMP
IC302
RFO AGCI RF AGC RF
46 40 38
& EQ
EQ
WBL
B.P.F.
AUX
33
3T PEAK
37
TEMP PEAK &
BOTM
BOTTOM
36
WBL
ADFM ADIN ADFG
AT
B.P.F. 29 30 32
AMP
ABCD ABCD
35
AMP
FOCUS FE
34
ERROR AMP
TE
26
TRACKING
SE
ERROR AMP
28
COMMAND
SERIAL/PARALLEL
V-I F0CNT
20
CONVERTER,
CONVERTER
DECODER
12 16 17 18
ABCD
PEAK HOLD
Q301
83 10 13 67 65 66 75 74 63 64
RECP
XRST
AUTOMATIC
POWER
CONTROL
SFDR
92
ANALOG MUX
SRDR
91
A/D CONVERTER
DIGITAL SERVO
SIGNAL
FROM CPU
FFDR
PROCESS
88
INTERFACE
FRDR
89
XLRF
80
CKRF
AUTO
81
SEQUENCER DTRF
82
TFDR
86
DIGITAL SERVO
TRDR
85
SIGNAL PROCESSOR
IC301 (2/2)
15
TX
EFMO
100
FILI
60
PCO
59
PLL
CLTV
62
FILO
61
ASYO
53
ASYI
54
COMPA-
RFI
RATOR
57
SUBCODE
ADIP PROCESSOR
78 DEMODULATOR/
DECODER
CPU
F0CNT SPINDLE
INTERFACE
79
SERVO
94 93 12 11 14 9 8 5 6 7
+3.3V
LEVEL SHIFT
IC502 (1/2)
TH501
X501
10MHz
59 31 32 39 62 55 54 52 45 51 64
7 6 56 11
CHUCKING
(LIMIT)
5 4
LOADING
MOTOR DRIVE
IC305
REFERENCE VOLTAGE
VREF 6 REGULATOR
Q303
1 7
M
M903
(LOADING)
23 23
ADDT
25
DATAI
SAMPLING 22
RATE
XBCKI
CONVERTER
24
LRCKI
23
DIN0
19
DIGITAL
DIN1
AUDIO
20
DOUT
INTERFACE
21
DADT DATA
26
BCK
LRCK
256FS
28 27 29
OSCI 1024FS OSC
16
CLOCK
IC304
OSCO
GENERATOR
17
INTERNAL BUS
MONITOR
CONTROL
D-RAM
IC307
1 2 3 4
XOE
43 22 OE
XWE
47 3
WE
XRAS
46 4 RAS
LEVEL SHIFT
XCAS
CAS
44 23
IC502 (2/2)
MD-RST
DEEMP
26 27 28 29 66
EJT-OK 57
MD MECHANISM CONTROLLER
IC501 (1/2)
A-MUTE 67
63
LOADING
DETECT DETECT
ON : When completion ON : When a disc loading start
of a disc loading and a disc eject completion
LOAD+6V
MDX-CA680/CA680X
• SIGNAL PATH
: MD PLAY
DATA, BCK,
LRCK, 256FS
A
(Page 25)
X301
45MHz
MD-RST,
DEEMP
B
(Page 25)
EJKT
C
(Page 25)
ATT
D
(Page 25)