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MDS-EX880/MS717
6-1. BLOCK DIAGRAM – MD SERVO Section –
HR901
OVER WRITE HEAD
I
I
1
J
J
2
F
B
C
B
I
J
D
A
A
A
4
B
5
E
C
6
DETECTOR
D
7
C
D
E
E
8
F
F
9
LASER DIODE
AUTOMATIC
APC
ILCC
POWER
LD/PD
11
CONTROL
AMP
Q162, 163
PD
LD
LASER ON
PD
PD
SWITCH
10
Q101
OPTICAL PICK-UP
(KMS-260A/J1N)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC152
PSB
16
6
OUT4F
IN4R
3
M901
M
(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
MOD
HF MODULE
05
SECTION 6
DIAGRAMS
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
SCTX
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
48 47
RFO
AGCI
RF
RF AGC
RF AMP
46
40
38
& EQ
EQ
B.P.F.
AUX
33
WBL
3T
TEMP
PEAK
37
PEAK &
BOTM
BOTTOM
36
WBL
ADFM
ADIN
ADFG
AT
29
30
32
B.P.F.
AMP
I-V
ABCD
ABCD
AMP
35
AMP
FE
FOCUS
34
ERROR AMP
TE
26
I-V
TRACKING
SE
AMP
ERROR AMP
28
COMMAND
SERIAL/
PARALLEL
V-I
CONVERTER,
CONVERTER
DECODER
12
20
16
17
18
+3.3V
SPFD
SPRD
64
74
73
13
75
66
65
RECP
APCREF
AUTOMATIC
83
POWER
CONTROL
SFDR
ANALOG MUX
92
SRDR
91
A/D CONVERTER
DIGITAL
SERVO
SIGNAL
FROM CPU
PROCESS
FFDR
88
INTERFACE
FRDR
89
AUTO
SEQUENCER
TFDR
86
DIGITAL SERVO
TRDR
85
SIGNAL PROCESSOR
IC121 (2/2)
– 19 –
15
TX
EFMO
100
FILI
59
PCO
58
PLL
CLTV
61
FILO
60
ASYO
51
ASYI
52
COMPA-
RFI
RATOR
55
SUBCODE
ADIP
PROCESSOR
78
DEMODULATOR/
DECODER
CPU
F0CNT
SPINDLE
INTERFACE
79
SERVO
94 93
10
12
11
14
9 8
20
5 23 41 36
49
LDON
40
DIG-RST
44
WRPWR
50
MOD
75
76
63
62
4
5
FIN
RIN
OVER WRITE HEAD
UP/DOWN
MOTOR DRIVE
OUT1 OUT2
IC172
1
7
M
M905
(OVER WRITE HEAD UP/DOWN)
XLRF
XLAT
80
CKRF
SCLK
81
DTRF
SWDT
82
HF MODULE
SWITCH
Q102 – 104, 113
IC121 (1/2)
ADDT
23
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
SAMPLING
ATRAC ENCODER/DECODER, 2M BIT D-RAM
RATE
IC121 (1/2)
CONVERTER
DIN
DIGITAL
21
AUDIO
DOUT
22
INTERFACE
DADT
24
26
25
27
D-RAM
OSCI
16
CLOCK
OSCO
22.5792MHz
GENERATOR
17
INTERNAL BUS
MONITOR
CONTROL
5 6 7
1 2 3 4
XOE
41
XWE
45
XRAS
44
XCAS
42
35 37 38
48 47 46 45
SCTX
42
MD MECHANISM CONTROLLER
IC316 (1/2)
LIMIT-IN
59
EEPROM
IC171
HEAD SW UP
73
SDA
5
79
SDA
SCL
SCL
6
80
HEAD SW DOWN
74
15
XIN
REFLECT
55
X302
7MHz
13
XOUT
PROTECT
54
– 20 –
(Page 21)
A
(Page 21)
B
(Page 21)
C
D
(Page 21)
X100
D-RAM
IC124
16
XOE
3
XWE
4
XRAS
XCAS
17
• SIGNAL PATH
: MD PLAY
: MD REC (ANALOG INPUT)
: MD REC (DIGITAL INPUT)
S681
(LIMIT IN)
S6
OVER WRITE HEAD
UP DETECT
S7
OVER WRITE HEAD
DOWN DETECT
S682
(REFLECT)
S683
(PROTECT)
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