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MDS-JB920
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6-2. BLOCK DIAGRAM – SERVO Section –
F
C B
D A
E
I J
J
I
B
A
C
D
E
F
DETECTOR
1
2
J
I
4
5
6
7
A
B
C
D
8
9
E
F
LDPD
LASER DIODE
ILCC
PD
OPTICAL PICK-UP
(KMS-260A/J1N)
AUTOMATIC
POWER
CONTROL
Q162, 163
LASER ON
SWITCH
Q101
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
HF MODULE
SWITCH
IC103, Q102 – 104
11
10
APC
PD
LD/PD
AMP
APCREF
I-V
AMP
I-V
AMP
AT
AMP
B.P.F.
29 30
WBL
ADFM
ADIN
32
ADFG
ABCD
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
35
34
26
28
ABCD
FE
TE
SE
V-I
CONVERTER
20
F0CNT
WBL
3T
EQ
SERIAL/
PARALLEL
CONVERTER,
DECODER
COMMAND
1716 18
SWDT
SCLK
XLAT
RF AMP
B.P.F.
46
RFO
40
RF AGC
& EQ
AGCI
EQ
38
RF
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
TEMP
48 47
MORFO
MORFI
3T
PEAK &
BOTTOM
WBL
33
AUX
63
37
PEAK
36
BOTM
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC152
6
8
OUT4F
OUT4R
M
M101
(SPINDLE)
27
25
OUT2F
OUT2R
M
M102
(SLED)
21
23
OUT1F
OUT1R
12
10
OUT3F
OUT3R
FCS+
FCS–
TRK+
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
3
4
IN4R
IN4F
29
30
IN2F
IN2R
19
18
IN1F
IN1R
14
15
IN3F
IN3R
MOD
SPFD
SPRD
92
91
88
89
86
85
APCREF
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
16PSB
PWM GENERATOR
AUTOMATIC
POWER
CONTROL
DIGITAL
SERVO
SIGNAL
PROCESS
75
66
65
67
ANALOG MUX
A/D CONVERTER
AUTO
SEQUENCER
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC121 (2/2)
RECP
AUX1
ABCD
FE
TE
SE
PEAK
BOTM
81
80
82
XLRF
CKRF
DTRF
XLAT
SCLK
SWDT
PLL
FILTER
60
59
62
61
FILI
PCO
CLTV
FILO
100
EFMO
25
ADDT
22
DATAI
512FS
OSC
IC123
IC121 (1/2)
15
TX
53
54
57
ASYO
ASYI
RFI
SCTX
HR901
OVER WRITE HEAD
ADIP
DEMODULATOR/
DECODER
78
ADFG
SPINDLE
SERVO
F0CNT
94 93
SPFD
SPRD
SUBCODE
PROCESSOR
SAMPLING
RATE
CONVERTER
DIGITAL
AUDIO
INTERFACE
DIN0
DOUT
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER
IC121 (1/2)
DADT
INTERNAL BUS
CLOCK
GENERATOR
XBCK
LRCK
FS256
OSCI
OSCO
CPU
INTERFACE
MONITOR
CONTROL
10
XRST
12
DQSY
11
SQSY
14
XINT
9 8 5 6 7
SENS
SRDT
SWDT
SCLK
XLAT
1 2 3 4
MNT0
MNT1
MNT2
MNT3
FOK
SHOCK
XBUSY
SLOCK
SWDT
SCLK
SWDT
SCLK
XLATCH
53
31 33 70 67 54 52 60
MNT0 (FOK)
MNT1 (SHOCK)
MNT2 (XBUSY)
MNT3 (SLOCK)
DIG-RST
SQSY
DQSY
LDON
WR-PWR
MOD
XINT
SENS
SRDT
78
79
LDIN
LDOUT
5
6
05
2
10
4
M
IN1 IN2
OUT1 OUT2
VZ
LOADING
MOTOR DRIVE
IC400
REFERENCE
VOLTAGE SWITCH
Q400, 401
M103
(LOADING)
49, 48, 50, 51
1, 2, 18, 19
DQ1 – DQ4
34 – 31, 36 – 40, 45
6 – 9, 11 – 15, 5
A0 – A9
D0 – D3A00 – A09
43 16
47 3
46 4
44 17
XOE
XWE
XRAS
XCAS
XOE
XWE
XRAS
XCAS
D-RAM
IC124
DIN1
SYSTEM CONTROLLER
IC800 (1/2)
74
13
64
69
79
83
12
HF MODULE
16
17
ADDT
DADT, BCK, LRCK
A
(Page 43)
DIGITAL IN
B
(Page 44)
D
512FS
(Page 43)
(Page 43)
SWDT, SCLK
F
(Page 43)
DIGITAL OUT
C
(Page 44)
E
5
20
55
32
18
56
59
SCTX
65
REFLECT
CHACK IN
PROTECT
75
LD-LOW
B+
80
S102
(REFLECT/PROTECT DETECT)
68
77
LIMIT-IN
REC-P
S101
(LIMIT IN)
76
PACK-OUT
• SIGNAL PATH
: PLAY (ANALOG OUT)
: PLAY (DIGITAL OUT)
: REC (ANALOG IN)
: REC (DIGITAL IN)
COMPA-
RATOR
EFM/ACIRC
ENCODER/DECODER
SHOCK PROOF
MEMORY CONTROLLER
ATRAC
ENCODER/DECODER
26
S601
(REC POSITION)
S602
(PACK OUT)
S603
(CHUCKING IN)
PB-P
74
S604
(PLAY POSITION)
28
21
20
19
2927
24
XBCKI
23
LRCKI
58
57
HIGH REFELECT RATE/
WRITE PROTECT
LOW REFELECT RATE/
UN-PROTECT