Kenwood X-92377000, X-92378000 Service manual

MD MECHANISM ASSY

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

SERVICE MANUAL

2000-5 PRINTED IN JAPAN B51-7623-00 (4) 3360

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

456

789

31514

APC

APCREF

EQADJ

3TADJ

WBLADJ

FZC

AUX1

AUX2

PEAK

BOTTOM

ABCDFEVC

SWDT

SCLK

XLAT

FOCONT

109

108

103

104

101

100

107

106

SPFD

SPRD

FFDR

FRDR

TFDR

TRDR

SFDR

SRDR

1114119

MNT0

MNT1

MNT2

MNT3

XINT

SQSY

SENS

SRDT

SCLK

SWDT

XLAT

XRST

363839

595823

FZC

XINT

SQSY

SENS

SRDT

SCLK

SWDT

XLAT

XRST

LDON

SDMUTE

LIMIT SW

P-ON

AMUTE

MSDA

MSCL

MSTOP

MRST

TYPE 1

TYPE 2

1510111213

472930

MNT 4

MNT 3

MNT 2

MNT 1

MNT 0

4M/16M

HOT

ESDA

ESCL

2019171629

252432

TRK+

TRK-

FCS+

FCS-

SLED+

SLED-

SPDL+

SPDL-VCVREF0

VCC2

VCC1

LOAD

EJECT

3145

TFDR

TRDR

FFDR

FRDR

SFDR

SRDR

SPFD

SPRD

REG IN

REG OUT

ENREG

LOAD

EJECT

131219

A8V

L-CH

R-CH

MRST

MSTOP

MSCL (IIC BUS)

MSDA

AMUTE

BU5V

S5V

LOE-SW

LOS-SW

DET-SW

LOAD

EJECT

293134

171820

MORF RFO

AUX 1

FOCONT

XSTBY

ADFG

22.58MHz

118

117

116

19754213

7374757670819077787980

1159

8.38MHz

MUTE 1

MUTE 2

MUTE 3

CH1,2

CH3

CH4

SW+5V

DAVDD

AUDIO +B

JITTER

RECORD IN

STBY

TO CH5 OP

S+B

SW+5V

S5V

+3.3V

BU+5V

1.2V rms

1KHz 0dB

SW+5V

TO SERVO DRIVER

BU+5V

ILCC

LDON

RF AMP

RF AGC & EQ

RF AMP

CXA2523AR

BPF P-P

PEAK &

BOTTOM

ABCD AMP

IV AMP

CVB

AMP

TEMP

VICCONV

ERROR AMP

FOCUSATAMP

BPF

TRACKING

ERROR AMP

SERIAL

PARALLEL

DECODER

BALANCE

E-F

FILTER

PLL

DECODER

ACIRC

EFM

MEMORY

RESISTANT

SHOCK

CONTROLLER

DYNAMIC RAM

ATRAC

DECODER

DIGITAL

FILTER

CONVERTER

D/A

POST FILTER

CONTROL

MONITOR

ANALOG

MUX

ADIP

DEMODULATOR

DECODER

SPINDLE

SERVO

GENERATOR

PWM

APC

DSP

SERVO

CONVERTER

A/D

CLOCK

GENERATOR

AUTO

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

ATRAC DECODER

DET.

REFLECT

APC

DETECTOR

TRACKING

COIL

FOCUS

COIL

SLED MOTOR

SPINDLE MOTOR

LOADING/EJECT MOTOR

THERMISTER

EEPROM

S-24C01B

128 8BIT

SW+5V

EFM/ACIRC DECODER

SHOCK PROOF MEMORY CONTROLLER

DIGITAL SERVO PROCESSOR

DIGITAL SIGNAL PROCESSOR

1M-WORD 4BIT DYNAMIC RAM

DIGITAL FILTER. D/A CONVERTER

CDX2659R

FOCUS/TRACKING COIL DRIVER

SPINDLE/SLED MOTOR DRIVER

LA6552

LOADING/EJECT MOTOR DRIVER

IC1

IC4

IC2

IC11

IC9

IC5

IC8

Q10

IC12

Q13

MOTOR ASS'Y

KMS-242B

OPTICAL PICKUP BLOCK

MOTOR BLOCK

X33 UNIT

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

BLOCK DIAGRAM

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

COMPONENT DESCRIPTION

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

Ref. No. Component Name Application/Function Operation/Condition/Compatibility

IC1

IC2

IC4 IC5 IC8

IC9 IC11 IC12

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 processing, 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"

MICROCOMPUTER'S TERMINAL DESCRIPTION

Microprocessor : 78015FYGC-R08 (X33 : IC11)

Pin No.

1 2 3 4 5 6 7 8 9

11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Pin Name

TEST0 JTIME TYPE2 TEST3 TESTE M REM NC NC VSS IVRTBAL PASS AGC PASS C1 COUNT NC SENS AUDIO INV 4M/16M LIMSW NC NC NC DEEM XRST XLAT VSS NC

I/O

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

Description Processing Operation

"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

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

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No. Description Processing OperationI/OPin Name

26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

42 43

44 45 46 47

48 49

50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

AMUTE P-ON LDON ESDA ESCL NC SDMUTE NC NC MRST FZC M-STOP XINT SQSY VDD

X1 IC

XT2 NC AVSS HOT

AUX1/NC NC

NC NC NC NC AVCON AVDD AVREF SRDT SWDT SCLK LADJ1 TYPE1 MSDA NC MSCL

Audio mute output

Unit internal system power control output

Laser APC control output

E2PROM serial data line

I/O

E2PROM serial clock line

I/O

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/

I/O

others not used OPEN

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.

I/O

OPEN

Serial clock line with system µ-COM.

I/O

Active : "L" Active : "L" Active : "H" (I2C-BUS) (I2C-BUS)

Active : "L"

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)

(I2C-BUS)

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

ADJUSTMENT

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.

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

ADJUSTMENT

• Display in service test mode (Display on the set)

Start of pit adjustment mode [01-_ : _ ] Pit adjustment enabled [01-_ : 50] Pit adjustment in progress (∗∗ =Adjustment data) [01-_ : ∗∗] Pit adjustment result entered (Start of groove adjustment mode) [02-_ : _ ] Groove adjustment enabled [02-_ : 50] Groove adjustment in progress (∗∗ =Adjustment data) [02-_ : ∗∗] Groove adjustment result entered (Normal completion) [02-_ : _ ]

• Error display (∗∗=Error status)[∗∗_ : _ ] ∗∗ = 03 : Error during low-reflection pit EF balance adjustment ∗∗ = 04 : Error during low-reflection pit focusing bias adjustment ∗∗ = 05 : Error during low-reflection pit data write in E2PROM ∗∗ = 19 : Error during groove EF balance adjustment ∗∗ = 20 : Error during groove focusing bias adjustment ∗∗ = 21 : Error during groove data write in E2PROM ∗∗ = 35 : Error during high-reflection pit EF balance adjustment ∗∗ = 36 : Error during high-reflection pit focusing bias adjustment ∗∗ = 37 : Error during high-reflection pit data write in E2PROM

• Adjustment parameters

Adjustment condition : Setting the LADJ 1 pin to Hi then reset-starting the set. Adjustment keys : Track UP/DOWN keys. Entry key : Pressing the Manual UP/DOWN key (or pressing and holding the adjustment key with some sets).

∗∗ Notes ∗∗

1. Always be sure to enter the results obtained with each medium. If the medium is ejected without entering the results and the adjustments of another medium is started, the E2PROM data will be destroyed.

2. Varying the focusing bias value extremely in the UP or DOWN direction degrades the focusing performance. Although this degradation can usually be recovered by retrying, there is also a potential of error occurrence or keys becoming invalid. In such a case, restart adjustment by reset-starting the set. (This also applies to the case in which data has been entered using an extreme value.)

3. Note on “E-99” “E-99” which usually indicates a mechanism error is also displayed when E2PROM data is destroyed. If a wire is attached or removed while the set’s power is on (BU UP), the E2PROM data could be destroyed ; be sure to attach or remove wire while the power is on (BU UP). This also applies to the attaching and removal of the card cable (flexible cable) to or from the mechanism. (Unlike the MDS-1000, normal operation cannot be resumed by turning the T0 pin Hi.)

4. Note on E2PROM The E2PROM stores a variety of initial data for the MD DSP, and some of the initial data is rewritten at the time of adjustment. As a result, note that an error occurs if the E2PROM in use does not store the initial data.

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

MECHANISM OPERATION DESCRIPTION

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

MECHANISM OPERATION DESCRIPTION

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

MECHANISM OPERATION DESCRIPTION

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