Block Diagram - Servo Section - Sony MDS-JB920 Service Manual

MDS-JB920
6-2. BLOCK DIAGRAM – SERVO Section –
HR901
OVER WRITE HEAD
I
J
F
B
C B
I J
D A
A
E
DETECTOR
C
D
E
F
LASER DIODE
AUTOMATIC
ILCC
POWER
CONTROL
Q162, 163
PD LD
LASER ON
PD
SWITCH
Q101
OPTICAL PICK-UP
(KMS-260A/J1N)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
M101 6 OUT4F
M
(SPINDLE)
8 OUT4R
M102 27 OUT2F
M
(SLED)
25 OUT2R
2-AXIS
DEVICE
FCS+
21 OUT1F
23 OUT1R
FCS–
TRK+
12 OUT3F
TRK–
10 OUT3R
MOD
HF MODULE
05
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
SCTX
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
48 47
I
RFO AGCI
1
RF AGC
RF AMP 46 40
J
& EQ
2
EQ
B.P.F. AUX
WBL
3T
TEMP
PEAK
PEAK &
BOTM
BOTTOM
WBL
ADFM ADIN
ADFG
AT
B.P.F. 29 30
AMP
A
4
B
5
I-V
ABCD
ABCD
C
6 AMP
AMP
D
7
FOCUS
ERROR AMP
E
8 I-V TRACKING
F
AMP ERROR AMP
9
COMMAND
APC
LD/PD
11
AMP
SERIAL/
PARALLEL
V-I
CONVERTER,
CONVERTER
DECODER
PD
10
12 20 16 17 18
IC152
PSB 16
SPFD
IN4R 3
SPRD
IN4F 4 13 67
RECP
APCREF AUTOMATIC
83
POWER
CONTROL
SFDR
IN2F 29 92
SRDR
IN2R 30 91
A/D CONVERTER
DIGITAL
SERVO
SIGNAL
PROCESS
FFDR
IN1F 19 88
FRDR
IN1R 18 89
SEQUENCER
TFDR
IN3F 14 86
DIGITAL SERVO
TRDR
IN3R 15 85 SIGNAL PROCESSOR
IC121 (2/2)
– 41 –
EFMO
100
FILI
60
PCO
59
PLL
CLTV
62
FILO
61
ASYO
53
ASYI
54
COMPA-
RF
RFI
RATOR
38 57
33
37
36
SUBCODE
ADIP PROCESSOR
32 78 DEMODULATOR/
DECODER
35
FE
F0CNT SPINDLE
34
79
SERVO
TE
26
SE
28
94 93 10 12 11
18
56 LDON
53 DIG-RST
59 WR-PWR
69 MOD
65 66 75 74 63 64
LOADING
ANALOG MUX
MOTOR DRIVE
IC400
FROM CPU
INTERFACE
XLRF XLAT
80
AUTO CKRF SCLK
81
DTRF SWDT
82
HF MODULE
SWITCH
IC103, Q102 – 104
15
IC121 (1/2)
TX
ADDT
25
DATAI
22
DIGITAL SIGNAL PROCESSOR,
SAMPLING
EFM/ACIRC ENCODER/DECODER,
XBCKI
RATE
24
SHOCK PROOF MEMORY CONTROLLER,
CONVERTER
LRCKI
ATRAC ENCODER/DECODER
23
IC121 (1/2)
DIN0
19
DIGITAL
DIN1
AUDIO 20
DOUT
INTERFACE
21
DADT
26
28 27 29
OSCI
CLOCK
OSCO
GENERATOR
INTERNAL BUS
CPU MONITOR
INTERFACE CONTROL
14 9 8 5 6 7 1 2 3 4
XOE
XWE
SWDT
XRAS
SCLK
XCAS
5 20 55 32 31 33 70 67 54 52 60
SYSTEM CONTROLLER
IC800 (1/2)
78 79
5 6
IN1 IN2
REFERENCE
VZ 4 B+
VOLTAGE SWITCH
Q400, 401
OUT1 OUT2
2 10
80 LD-LOW
M
M103
(LOADING)
– 42 –
ADDT
A (Page 43)
DIGITAL IN
B (Page 44)
DIGITAL OUT
C
(Page 44)
DADT, BCK, LRCK
D (Page 43)
512FS
512FS
E
16 OSC (Page 43)
IC123
17
D-RAM
IC124
43 16 XOE
47 3 XWE
46 4 XRAS
44 17 XCAS
SWDT, SCLK
F
(Page 43)
SCTX 65
• SIGNAL PATH
: PLAY (ANALOG OUT)
: PLAY (DIGITAL OUT)
: REC (ANALOG IN)
: REC (DIGITAL IN)
S101
LIMIT-IN 68
(LIMIT IN)
S601
REC-P 77
(REC POSITION)
S602
PACK-OUT 76
(PACK OUT)
S603
CHACK IN 75
(CHUCKING IN)
S604
PB-P 74
(PLAY POSITION)
REFLECT 57
PROTECT 58
S102
(REFLECT/PROTECT DETECT)
HIGH REFELECT RATE/
WRITE PROTECT
LOW REFELECT RATE/
UN-PROTECT