Sony MZ-R900 service manual Diagrams, Block Diagram Servo Section

SECTION 6

MZ-R900

DIAGRAMS

6-1.

BLOCK DIAGRAM – SERVO Section –

OVER WRITE HEAD DRIVE

IC601 (1/2)

•

SIGNAL PATH

HB

HR601

35

: PLAYBACK

OVER WRITE

EFM

EFM

OVER

7

OPTICAL PICK-UP BLOCK

WRITE

HEAD DRIVE

HA

PRE DRIVER

: REC (ANALOG IN)

Q604, 605

(LCX-4R)

33

CLK

HEAD

4

: REC (DIGITAL IN)

OUTA

VRECIN2

VRECO

M603

41

H-BRIDGE

37

OUTB

VRECIN1

B+

RF AMP, FOCUS/TRACKING ERROR AMP

OVER WRITE

M

38

PRE DRIVER

42

HEAD

C1H

IC501

28

UP/DOWN

CHARGE

C1L

4

VREF

SYSTEM CONTROL (1/2)

PUMP 1

27

IY

–

25

VREF

RECON

CHARGE

C2H

31

+

SW

C2L

IX

OE

RI

FI

PUMP 2

38

–

1

2

3

5

6

+

JX

–

199 198 197

201 200

105

JX

JY

JX

IY

+

8

RF OUT

33

37 RFI

MODE3

MODE2

MODE1

HDCON2

HDCON1

EFMD

JY

–

9

IX

PEAK

DIN1

10

JX

PEAK

29

44 PEAK

DIN1

62

A

(Page28)

+

RF AMP,

BOTM

IX

IY

IX

A

11

JY

/BOTM

28

45 BOTM

–

A

FOCUS

ADDT

12

ERROR,

ABCD

ADDT

68

B

(Page 28)

+

B

41

46 ABCD

SYSTEM CONTROLLER,

B

14

TRACKING

A

B C

D

–

C

ERROR

FE

42

47 FE

DIGITAL SIGNAL PROCESSOR,

5

16M BIT D-RAM

+

6

D

TE

1

56 TE

IC801 (1/3)

DADT

67

DADT

C

(Page 28)

C

–

A-C

ADIP IN

13

TPP/WPP

44

+

D-C

ADIP

21

74 ADIP

D

7

–

PD-I

PD-NI

+

18

APC

19

78 APCREF

CLK

D

(Page 29)

MON

–

31

49 VC

VC

+

12 VREF MON

AUTOMATIC

OFTRK

26

217 OFTRK

LD-A

PD-O

LD

POWER

20

RESET

25

221 XRF RST

CONTROL

Q501

FOCUS/TRACKING

SERIAL

COIL DRIVE,

SPINDLE/SLED

INTERFACE

MOTOR DRIVE

IC551

SBUS

23

160 SSB DATA

SCK

TRK+

33 FO3

FI3 25

24

161 SSB CLK

TRACKING

81 TFDR

S-MONITER

S-MON

43

9

S MON

TRK–

35 RO3

COIL DRIVE

RI3 24

80 TRDR

S0

194 PD S0

FCS+

10 FO1

FOCUS

FI1 19

82 FFDR

FCS–

8

RO1

COIL DRIVE

RI1 18

83 FRDR

2-AXIS

S1

195 PD S1

DEVICE

TRK+

TRK+

233 SLD MON

14 FO2

FI2 17

(FOCUS)

(TRACKING)

96 SLDR

SLCU 100

SLD1 MON

42 CPAIP

SLD2 MON

TRK–

TRK–

12 RO2

SLED

RI2 16

98 SLDV

SLCV 101

41 CPAIM

MOTOR

PWMI4 20

97 SFDR

FCS+

FCS+

(SLED)M602

M

29

FO4

DRIVE

FI4

26

99 SLDW

FCS–

FCS–

40 CPBIP

RI4 27

31 RO4

102 SLCW

39 CPBIM

SPINDLE

166 SPDL AUX PWM

CPA0 38

PWM

5

SERVO

SLED VOLTAGE

DRIVE

SLD 1 MON

SLD 2 MON

CPB0 37

MONITER

SWITCH

88 SPFD/SPVS/PWM3

IC805

223 SPDL MON

48 UO

UI

4

87 SPDU

53 CPUI

SPINDLE

VI

SPCU 93

CLV MON U

46 VO

3

89 SPDV

MOTOR

52 CPVI

DRIVE

WI

SPCV 94

CLV MON V

U

44 WO

2

90 SPDW

M601

W

V

51 CPWI

SPCW 95

CLV MON W

(SPINDLE)

54

COM

SPINDLE

VOLTAGE MONITOR

OF

6

220 XRST MTR DRV

CPWO

BIAS

CPVO

CPUO

55

56

1

CLV MON W

CLV MON V

CLV MON U

VREF

E

(Page 29)

27

27