Adjusting Points and Connecting Points | Sony MDS-JB920 instruction

16. ADJUSTING POINTS AND CONNECTING POINTS

[BD BOARD] (SIDE A)

CN101

D101

CN110 GND

I+3V

IOP

TE

RF

VC

NOTE

IC171

[BD BOARD] (SIDE B)

IC101

IC121

IC192

Note: It is useful to use the jig. for checking the waveform. (Refer to Servicing Notes on page 6.)

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Sony MDS-JB920 service manual Adjusting Points and Connecting Points

Contents

MDS-JE520 SpecificationsMDM-5A General SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Diagrams Table of ContentsSection Servicing Notes Varning Flexible Circuit Board RepairingVaroitus IOP JIG for Checking BD Board Waveform Record Precedure Forced Reset Checks Prior to Parts Replacement and AdjustmentsREC/PLAY Precedure Retry Cause Display Mode Hexadecimal nBinary Conversion Table Location of Controls Section GeneralFront view Rear view Page Page Case Section Disassembly Main Board Front Panel Seciton Slider CAM Mechanism Section MDM-5A SW BOARD, Loading Motor M103 Base Unit MBU-5A, BD Board Exiting the Test Mode Section Test ModePrecautions for USE of Test Mode Setting the Test Mode Display Contents Mark Group Selecting the Test Mode Non-Volatile Memory Mode EEP Mode Operating the Continuous Playback ModeMID Detrack check display Not used in servicing Test Mode DisplaysFunctions of Other Buttons Auto gain display Not used in servicing Meanings of Other Displays Display Contents When Lit When Off Parts Replacement and Adjustment Section Electrical Adjustments Laser power meter Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK-UP KMS-260A Precautions for Adjustments Traverse Check Temperature Compensation Offset CheckLaser Power Check Check Prior to Repairs Self-Recording/playback Check Play Checking MO Error Rate CheckCD Error Rate Check Focus Bias Check Recording and Displaying the IOP Information Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Laser Power Adjustment Traverse Adjustment Focus Bias Adjustment MO Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level Adjustment Adjusting Points and Connecting Points BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP Section DiagramsIC PIN Function Description Sqsy SrdtSens Xrst Asyo XrasXWE Mvci Spfd SrdrSfdr Sprd Main Board IC100 CXD8607N A/D Converter Lvdd AvddlVDD1 TEST2 Main Board IC800 M30610MCA-264FP System Controller MDS-JB920 REC Digital Block Diagram Servo Section∙ Signal Path REC Analog ∙ Signal Path Play Analog OUT Block Diagram Main SectionPlay Digital OUT Circuit Boards Location Printed Wiring Boards BD Section MDS-JB920 53 for Waveforms. See page 70 and 71 for IC Block Diagrams Schematic Diagram BD /2 See Waveforms 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 CXA2523AR Schematic Diagram BD Switch SectionPrinted Wiring Board BD Switch Section IC Block Diagrams BD Board IC101 IC152 BH6511FS-E2 IC121 CXD2654R CXA8042AS Main Board IC100 CXD8607NIC101 CXA8054M IC203 IC200 CXD8767N SN74HCU04ANS-E20 SN74HC153ANS Chassis Section Section Exploded Views Supplied with RV760 Front Panel Section 204 205 206 201209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List CXA2523AR TANTAL. ChipDiode Diode F1J6TP Disp Main C252 Mylar SN74HC153ANS HZS6C1LHZ7.5CP-TK CXA8042AS 390 LED SEL6810A-TH10 Mega Control Transistor Main PSWCoil with Core Vibrator LED SEL6210S-TH10 Standby SW VOL Sony Corporation