Sony MDS-JB920 service manual SN74HC153ANS, SN74HCU04ANS-E20

Page 58

IC300

SN74HC153ANS

IC700

LA5632

DATA INPUTS

STROBE

A

OUTPUT

PH5

1

VCC

2G

SELECT

2C3

2C2

2C1

2C0

2Y

+

16

15

14

13

12

11

10

9

–

2C3

2C2

2C1

2C0

2Y

STBY

2

2G

VCC

3

ANA5

4

+

B

B

A

A

–

SYS3.3

5

–

B

B

A

A

+

1G

+

–

1C3

1C2

1C1

1C0

1Y

B.BAK

6

3.3V

1

2

3

4

5

6

7

8

AC

7

STROBE

B

1C3

1C2

1C1

1C0

OUTPUT GND

1G

SELECT

1Y

CD1

8

DATA INPUTS

DELAY

–

P. DOWN

9

CIRCUIT

+

IC301, 704

SN74HCU04ANS-E20

GND

10

VCC

14

13

12

11

10

9

8

CD2

11

DELAY

–

S. RESET

12

+

CIRCUIT

VREF

1

2

3

4

5

6

7

GND

IC400

LB1641

T.S.D

O.C.P

MOTOR

MOTOR

DRIVE

DRIVE

FWD/REV/STOP

CONTROL LOGIC

1

2

3

4

5

6

7

8

9

10

GND

MOTOR

DRIVE

NOISE

FILTER

CLAMP

FWD.IN

REV.IN

VCC 1

VCC 2

NOISE FILTER

MOTOR

DRIVE

IC701

M5293L

GND

2

5k

5

REFERENCE

VOLTAGE

27k

+

3

OUT

ON/OFF

4

REFERENCE

–

VOLTAGE

OVERHEAT

OVERCURRENT

PROTECTION

LIMITTER

IN

1

– 74 –

Image 58

Contents MDS-JE520 SpecificationsMDM-5A SELF-DIAGNOSIS Function GeneralItems of Error History Mode Items and Contents Diagrams Table of ContentsSection Servicing Notes Varning Flexible Circuit Board RepairingVaroitus JIG for Checking BD Board Waveform IOPRecord Precedure Forced Reset Checks Prior to Parts Replacement and AdjustmentsREC/PLAY Retry Cause Display Mode PrecedureHexadecimal nBinary Conversion Table Location of Controls Section GeneralFront view Rear view Page Page Section Disassembly CaseFront Panel Seciton Main BoardMechanism Section MDM-5A Slider CAMBase Unit MBU-5A, BD Board SW BOARD, Loading Motor M103Setting the Test Mode Section Test ModePrecautions for USE of Test Mode Exiting the Test ModeSelecting the Test Mode Display Contents Mark GroupNon-Volatile Memory Mode EEP Mode Operating the Continuous Playback ModeMID Auto gain display Not used in servicing Test Mode DisplaysFunctions of Other Buttons Detrack check display Not used in servicingDisplay Contents When Lit When Off Meanings of Other DisplaysSection Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Adjustments Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK-UP KMS-260A Laser power meterCheck Prior to Repairs Temperature Compensation Offset CheckLaser Power Check Traverse CheckFocus Bias Check Play Checking MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment CD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP Section DiagramsIC PIN Function Description Xrst SrdtSens SqsyMvci XrasXWE AsyoSprd SrdrSfdr SpfdMain Board IC100 CXD8607N A/D Converter TEST2 AvddlVDD1 LvddMain Board IC800 M30610MCA-264FP System Controller MDS-JB920 REC Analog Block Diagram Servo Section∙ Signal Path REC Digital∙ Signal Path Play Analog OUT Block Diagram Main SectionPlay Digital OUT Circuit Boards Location Printed Wiring Boards BD Section MDS-JB920 Schematic Diagram BD /2 See 53 for Waveforms. See page 70 and 71 for IC Block DiagramsWaveforms BD board Main board Disp board MDS-JB920 MDS-JB920 MDS-JB920 MDS-JB920 Other layers pattern Side a US, CND Schematic Diagram Panel Section See page 54 for Waveforms IC Block Diagrams BD Board IC101 Schematic Diagram BD Switch SectionPrinted Wiring Board BD Switch Section CXA2523ARIC121 CXD2654R IC152 BH6511FS-E2IC203 Main Board IC100 CXD8607NIC101 CXA8054M CXA8042ASIC200 CXD8767N SN74HC153ANS SN74HCU04ANS-E20Section Exploded Views Chassis SectionFront Panel Section Supplied with RV760204 205 206 201209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List Diode F1J6TP TANTAL. ChipDiode CXA2523ARDisp Main C252 Mylar CXA8042AS HZS6C1LHZ7.5CP-TK SN74HC153ANS390 LED SEL6210S-TH10 Standby Main PSWCoil with Core Vibrator LED SEL6810A-TH10 Mega Control TransistorSW VOL Sony Corporation