Service Manual for KENWOOD X92_377000001

MD MECHANISM ASSY

X92-3770-00,0-01

X92-3780-00,0-01

2000-5 PRINTED IN JAPAN

B51-7623-00 (4) 3360

SERVICE MANUAL

C

CONTENTS

BLOCK DIAGRAM .............................................................. 2

COMPONENT DESCRIPTION ........................................... 3

MICROCOMPUTER'S TERMINAL DESCRIPTION ........... 3

ADJUSTMENT .................................................................... 5

MECHANISM OPERATION DESCRIPTION ..................... 7

PC BOARD ....................................................................... 24

EXPLODED VIEW ............................................................ 26

SCHEMATIC DIAGRAM ................................................... 27

PARTS LIST ..................................................................... 29

2

1

2

4

5

6

7

8

9

3

15

14

I

J

A

B

C

D

E

F

11

12

22

23

25

41

42

19

APC

APCREF

EQADJ

3TADJ

WBLADJ

FZC

RF

AUX1

AUX2

PEAK

BOTT

OM

ABCD

FE

VC

SWDT

SCLK

XLA

T

FOCONT

109

108

103

104

101

100

107

106

SPFD

SPRD

FFDR

FRDR

TFDR

TRDR

SFDR

SRDR

11

14

11

9

6

13

12

MNT0

MNT1

MNT2

MNT3

XINT

SQSY

SENS

SRDT

SCLK

SWDT

XLA

T

XRST

36

38

39

14

57

59

58

23

22

FZC

XINT

SQSY

SENS

SRDT

SCLK

SWDT

XLA

T

XRST

28

32

17

27

26

62

64

37

35

61

3

LDON

SDMUTE

LIMITSW

P-ON

AMUTE

MSDA

MSCL

MSTOP

MRST

TYPE1

TYPE2

15

10

11

12

13

16

47

29

30

MNT

4

MNT

3

MNT

2

MNT

1

MNT

0

4M/16M

HOT

ESDA

ESCL

20

19

17

16

29

30

23

22

26

25

24

32

33

TRK+

TRK-

FCS+

FCS-

SLED+

SLED-

SPDL+

SPDL-

VC

VREF0

VCC2

VCC1

LOAD

EJECT

10

11

12

13

6

7

8

9

28

27

3

14

5

TFDR

TRDR

FFDR

FRDR

SFDR

SRDR

SPFD

SPRD

REG

IN

REG

OUT

ENREG

LOAD

EJECT

11

10

8

13

12

19

18

14

17

4

5

1

20

21

6

7

A8V

L-CH

R-CH

MRST

MST

OP

MSCL

(IIC

BUS)

MSDA

AMUTE

BU5V

S5V

LOE-SW

LOS-SW

DET

-SW

LOAD

EJECT

36

30

29

31

34

35

37

33

38

47

46

48

40

10

28

26

32

17

18

20

27

16

42

41

MORF

RFO

AUX

1

FOCONT

XSTBY

ADFG

22.58MHz

11

8

11

7

11

6

19

7

5

4

2

1

3

73

74

75

76

70

81

90

77

78

79

80

93

97

96

95

94

82

89

88

1

13

11

5

9

10

8

12

2

6

8.38MHz

4

MUTE1

MUTE2

1

2

MUTE3

36

CH1,2

CH3

CH4

31

57

SW+5V

DA

VDD

AUDIO

+B

JITTER

RECORD

IN

VC

TE

SE

VC

PD

LD

STBY

T

O

CH5

OP

S+B

SW+5V

S5V

+3.3V

BU+5V

6

5

BU+5V

1.2V

rms

1KHz

0dB

SW+5V

T

O

SER

VO

DRIVER

BU+5V

ILCC

LDON

RF

AMP

RF

AGC

&

EQ

RF

AMP

CXA2523AR

BPF

P-P

PEAK

&

BOTT

OM

ABCD

AMP

IV

AMP

IV

AMP

CVB

AMP

TEMP

VICCONV

ERROR

AMP

FOCUS

AT

AMP

BPF

TRACKING

ERROR

AMP

SERIAL

P

ARALLEL

DECODER

BALANCE

E-F

FILTER

PLL

DECODER

ACIRC

EFM

MEMOR

Y

RESIST

ANT

SHOCK

CONTROLLER

DYNAMIC

RAM

A

TRAC

DECODER

DIGIT

AL

FIL

TER

CONVER

TER

D/A

POST

FIL

TER

CONTROL

MONIT

OR

ANALOG

MUX

ADIP

DEMODULA

T

O

R

DECODER

SPINDLE

SER

VO

GENERA

T

O

R

PWM

APC

DSP

SER

VO

CONVER

TER

A/D

CLOCK

GENERA

T

O

R

AUT

O

SEQUENCER

I/F

CPU

PROCESSOR

SUBCODE

TC74HCT7007AF

MECHA

u-COM

UPD78015FYGC

CH2

DRIVER

CH1

DRIVER

CH4

DRIVER

CH3

VREF

DRIVER

CH5

NJM4565MD

LPF

SW+8V

A3.3V

REG.

LIMIT

SW

LOE-SW

LOS-SW

DET

-SW

A

TRAC

DECODER

DET

.

REFLECT

APC

CB

DA

F

E

J

I

DETECT

OR

TRACKING

COIL

FOCUS

COIL

M

SLED

MOT

OR

SPINDLE

MOT

OR

M

LOADING/EJECT

MOT

OR

M

THERMISTER

EEPROM

S-24C01B

128

8BIT

SW+5V

EFM/ACIRC

DECODER

SHOCK

PROOF

MEMOR

Y

CONTROLLER

DIGIT

AL

SER

VO

PROCESSOR

DIGIT

AL

SIGNAL

PROCESSOR

1M-WORD

4BIT

DYNAMIC

RAM

DIGIT

AL

FIL

TER.

D/A

CONVER

TER

CDX2659R

FOCUS/TRACKING

COIL

DRIVER

SPINDLE/SLED

MOT

OR

DRIVER

LA6552

LOADING/EJECT

MOT

OR

DRIVER

IC1

Q1

IC4

Q3

IC2

IC1

1

IC9

IC5

IC8

Q10

IC12

Q13

Q7

MOT

O

R

ASS'Y

KMS-242B

OPTICAL

PICKUP

BLOCK

MOT

OR

BLOCK

X33

UNIT

X92-3770-00,0-01/X92-3780-00,0-01

BLOCK DIAGRAM

MICROCOMPUTER'S TERMINAL DESCRIPTION

3

X92-3770-00,0-01/X92-3780-00,0-01

COMPONENT DESCRIPTION

IC1

IC2

IC4

IC5

IC8

IC9

IC11

IC12

Q1

Q2

Q3

Q7

Q10

Q12

Q13

CXA2523AR

CXD2659R

LA6552

NJM4565MD

LP2982-3.3

TC74HCT7007AF

78015FYGC-R08

S-24C01B

2SA1362(Y)

DTA114EUA

2SC4116(Y)

MCH6101

2SA1576A

DTC143EUA

2SA1576A

RF matrix amp.

Digital signal processor

5ch BTL driver

LPF

3.3V AVR

CMOS buffer

MD mechanism MI-COM.

E2PROM

APC

LD SW

Disc reflection detection

3.3V AVR

A 8VSW

P ON 5V SW

RF amplifier (pit and groove switching, AGC, EQ), gain switching

I-V amplifier.

Amplification of the light intensity signal output, peak hold output,

bottom hold output, FE output, TE output, SE output, ADIP binary

output, VREF output and APC PD

EFM decording, EFM digital PLL, ACIRC decording, auto link pro-

cessing, ADIP decording.

Digital servos (focusing, tracking, sled, spindle CLV).

ATRAC decording, 1bit D/A, analog post-filtering, memory control.

Drives actuators and motors, +3.3V REGULATOR

Third active filter

D/A audio +B

Level shifting from 3.3V to 5.0V

Servo control, memory control, system control and interfacing

Servo coefficients and servo adjustment data backup memory

Laser power control.

On at base"L" while laser is OFF.

On when focusing point is passed during upward search.

Servo +B

Analog 8V power supply.

On at base"L"

Ref. No. Component Name

Application/Function

Operation/Condition/Compatibility

MD PLAYER UNIT (X33-3040-00/0-01)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

"H" turns normal test mode ON.

"L": 200ms, "H": 300ms

"L": 2655R, 2652AR, "H": 2655BR, 2654R

"H" turns special test mode ON.

"H" turns external input mode ON.

75% or more remains at "H"

IVR-TBAL auto align bus at "H"

AGC auto align bus at "H"

Error count mode at "H"(When it's in text mode)

Reverse polarity at "H".

"H" turns 16M bit operation (fixed on RESET)

"L" when innermost limit is detected.

During 2652AR : ON at "H", during 2654R : ON at "L"

Active : "L"

Latch at falling edge

Test mode input 0

Groove area jump time selection input

Destination selector 2

Test mode input 3

E2PROM external input test mode

Test mode memory remainder output

OPEN

No auto align mode input

C1 error count mode input

GND

Internal status input from DSP LSI

DAC output polarity reversal input

DRAM size selection input

Pickup innermost limit detection

OPEN

De-emphasis output to external DAC

Reset output to DSP LSI and servo driver IC

Latch output to DSP LSI

OPEN

Pin No.

Microprocessor : 78015FYGC-R08 (X33 : IC11)

Description

Processing Operation

I

O

I

O

I/O

TEST0

JTIME

TYPE2

TEST3

TESTE

M REM

NC

VSS

IVRTBAL PASS

AGC PASS

C1 COUNT

NC

SENS

AUDIO INV

4M/16M

LIMSW

NC

DEEM

XRST

XLAT

VSS

NC

Pin Name

4

X92-3770-00,0-01/X92-3780-00,0-01

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No.

Description

Processing Operation

I/O

Pin Name

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

Active : "L"

Active : "H"

(I2C-BUS)

Active : "L"

"H"for interrupt request generation

Active : "L"

"L"for interrupt status generation

Vth On : 3.87V, Vth Off : 3.74V, Vth Low : 0.43V

Jitter input during FBAL alignment

"H"with AVREF reference voltage

"H"for manual adjustment mode

"L": 2655R, 2655BR, "H": 2652AR, 2654R

(I2C-BUS)

Audio mute output

Unit internal system power control output

Laser APC control output

E2PROM serial data line

E2PROM serial clock line

OPEN

Sled driver mute output

OPEN

Reset input from system

µ-COM.

FZC interrupt request input

Standby control input from system

µ-COM.

Interrupt request from DSP LSI

Sub-code Q sync or ADIP sync input

Connect crystal oscillator as main system

clock.

Connect crystal oscillator as main system

clock.

(not used : BU5V connection)

Temperature detection input

AUX1 input durring 2654R mode/

others not used

OPEN

AVREF terminal control output

Connected to AVCON terminal

Serial data input from DSP LSI

Serial data output to DSP LSI

Shift clock output to DSP LSI

Manual adjustment mode input

Destination selector 1

Serial data line with system

µ-COM.

OPEN

Serial clock line with system

µ-COM.

O

I/O

O

I

I/O

O

I

O

I

I/O

O

I/O

AMUTE

P-ON

LDON

ESDA

ESCL

NC

SDMUTE

NC

MRST

FZC

M-STOP

XINT

SQSY

VDD

X2

X1

IC

XT2

NC

AVSS

HOT

AUX1/NC

NC

AVCON

AVDD

AVREF

SRDT

SWDT

SCLK

LADJ1

TYPE1

MSDA

NC

MSCL

ADJUSTMENT

5

X92-3770-00,0-01/X92-3780-00,0-01

Service Test Mode (Manual Adjustment Mode) of the MDS-2200

The focusing bias (balance) adjustment of the MDS-2200 has been subjected to automatic adjustment at the factory and the

obtained bias value has been written in the E2PROM, and the set performs adjustment by reading the E2PROM data.

Consequently, after the pickup has been replaced in servicing, it is required to adjust the focusing bias again. This can be done

automatically if the dedicated commander for the MDS-2200 and a jitter meter are available, but the set also incorporates a

service test mode (manual adjustment mode) for use in case these instruments are not available.

· Adjustment procedure (Be sure to begin setup while the power of the set is off.)

1. Pull up pin 60 (LADJ1 (check land 1)) of lC11 in the X33-unit to BU5V (check land BU5).

2. Lead wires from check land ARF and check land SAG (servo GND) in the X33-unit so that they an be monitored with an

oscilloscope.

3. Turn the set on and perform the reset power-ON operation.

The adjustment includes three modes ; the Iow-reflection pit and groove modes for recordable discs and the high-reflection

pit mode for premastered discs.

4. Load a disc to enter the adjustment mode.

5. The low-reflection pit play mode starts when TNo.1 is displayed.

The time code display shows "50".

6. While monitoring ARF with an oscilloscope, vary the focusing bias using the Track UP and DOWN keys.

7. The optimum values can be obtained by varying the bias in the UP and DOWN directions, locating the upper and lower values

at which the ARF waveform is disturbed or the 3T waveform level drop, and calculating the center value of the two values.

For example, when the value located in the UP direction is 58 and that located in the DOWN direction is 46, the optimum value

is their center value, i. e. 52.

8. When the optimum value is obtained, set the focusing bias to that value and press the ManuaI UP or DOWN key to enter the

value.

(With normal sets, press and hold the Track UP or DOWN key.)

9. After the low-reflection pit adjustment in step 8, the pickup automatically moves to the groove area.

10. The groove play mode starts when TNo.2 is displayed.

11. Perform the same operations as steps 6, 7 and 8.

12. The disc stops after the groove area adjustment .

Eject the disc and complete adjustment.

Since the low-reflection pits are present only in the TOC area, their total play time is about 40 seconds. When the pit area

is over, the retry operation starts and the adjustment is invalid in this period.

13. When the high-reflection play mode starts, perform operations in steps 5, 6, 7 and 8.

14. The disc stops after the adjustment. Eject the disc and complete adjustment.

The coarse adjustment of the EF balance is also performed during this test mode.

However, it is an automatic adjustment and does not require external poeration.

KENWOOD X92_377000001 Service Manual

Manual details

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