JIG for Checking BD Board Waveform, Iop | Sony MDS-JB920 instruction

JIG FOR CHECKING BD BOARD WAVEFORM

The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows.

GND : Ground

I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser)

IOP	: For measuring IOP (Check the deterioration of the optical pick-up laser)
TE	: TRK error signal (Traverse adjustment)
VC	: Reference level for checking the signal
RF	: RF signal (Check jitter)

Mechanism deck

CN110

6P connector

5P Connector

RF

VC

TEO

IOP

I+3V

GND

	1	RF
RF		VC
		TEO MDM-3
VC		IOP
TEO	5	I-3V
TEO
IOP	1	VC
I+3V		RF
I+3V		TEO	MDM-5
		IOP	MDM-5
		IOP
GND	6	I+3V
	6	GND

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Image 6

Sony MDS-JB920 service manual JIG for Checking BD Board Waveform, Iop

Contents

Specifications MDS-JE520MDM-5A SELF-DIAGNOSIS Function General Items of Error History Mode Items and Contents Table of Contents DiagramsSection Servicing Notes Flexible Circuit Board Repairing VarningVaroitus JIG for Checking BD Board Waveform IOP Record Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetREC/PLAY Retry Cause Display Mode Precedure Hexadecimal nBinary Conversion Table Section General Location of ControlsFront view Rear view Page Page Section Disassembly Case Front Panel Seciton Main Board Mechanism Section MDM-5A Slider CAM Base Unit MBU-5A, BD Board SW BOARD, Loading Motor M103 Setting the Test Mode Section Test ModePrecautions for USE of Test Mode Exiting the Test Mode Selecting the Test Mode Display Contents Mark Group Operating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeMID Auto gain display Not used in servicing Test Mode DisplaysFunctions of Other Buttons Detrack check display Not used in servicing Display Contents When Lit When Off Meanings of Other Displays Section Electrical Adjustments Parts Replacement and Adjustment Precautions for Adjustments Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK-UP KMS-260A Laser power meter Check Prior to Repairs Temperature Compensation Offset CheckLaser Power Check Traverse Check Focus Bias Check Play Checking MO Error Rate CheckCD Error Rate Check Self-Recording/playback Check Laser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Recording and Displaying the IOP Information Traverse 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 Adjustment Adjusting Points and Connecting Points Section Diagrams BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMPIC PIN Function Description Xrst SrdtSens Sqsy Mvci XrasXWE Asyo Sprd SrdrSfdr Spfd Main Board IC100 CXD8607N A/D Converter TEST2 AvddlVDD1 Lvdd Main Board IC800 M30610MCA-264FP System Controller MDS-JB920 REC Analog Block Diagram Servo Section∙ Signal Path REC Digital Block Diagram Main Section ∙ Signal Path Play Analog OUTPlay 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 Diagrams 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 IC Block Diagrams BD Board IC101 Schematic Diagram BD Switch SectionPrinted Wiring Board BD Switch Section CXA2523AR IC121 CXD2654R IC152 BH6511FS-E2 IC203 Main Board IC100 CXD8607NIC101 CXA8054M CXA8042AS IC200 CXD8767N SN74HC153ANS SN74HCU04ANS-E20 Section Exploded Views Chassis Section Front Panel Section Supplied with RV760 206 201 204 205209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List Diode F1J6TP TANTAL. ChipDiode CXA2523AR Disp Main C252 Mylar CXA8042AS HZS6C1LHZ7.5CP-TK SN74HC153ANS 390 LED SEL6210S-TH10 Standby Main PSWCoil with Core Vibrator LED SEL6810A-TH10 Mega Control Transistor SW VOL Sony Corporation