Sony MDS-JB920 service manual SELF-DIAGNOSIS Function, General

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General

Power requirements

Where purchased

 

Power requirements

Continental Europe and UK

220 – 230 V AC, 50/60 Hz

U.S.A and Canada

 

120 V AC, 60 Hz

 

 

 

Power consumption

18 W

 

Dimensions (approx.) (w/h/d) incl.projecting parts and controls

 

430 × 107.5 × 287 mm

 

(17 × 41/4 × 113/8 in)

Mass (approx.)

4.8 kg (10 lb 9 oz)

Supplied accessories

Audio connecting cords (2)

Optical cable (1)

Remote commander (remote) RM-D17M (1)

R6 (size-AA) batteries (2)

Design and specifications are subject to change without notice.

SELF-DIAGNOSIS FUNCTION

The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following “Pro cedure for using the Self-Diagnosis Function (Error History Display Mode)”.

Procedure for using the Self-Diagnosis Function (Error History Display Mode).

Note: Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least req uired procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to exit the mode.

1.While pressing the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob and [ÊÊ]p button, connect the power plug to the outlet, and release the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob and [ÊÊ]p button.

2.Rotate the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob and when “[Service]” is displayed, press the [YES] button.

3.Rotate the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob and display “ERR DP MODE”.

4.Pressing the [YES] button sets the error history mode and displays “total rec”.

5.Select the contents to be displayed or executed using the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob.

6.Pressing the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob will display or execute the contents selected.

7.Pressing the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob another time returns to step 4.

8.Pressing the [MENU/NO] button displays “ERROR DP MODE” and exits the error history mode.

9. To exit the test mode, press the [REPEAT] button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.

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Contents MDM-5A SpecificationsMDS-JE520 SELF-DIAGNOSIS Function GeneralItems of Error History Mode Items and Contents Section Servicing Notes Table of ContentsDiagrams Varoitus Flexible Circuit Board RepairingVarning JIG for Checking BD Board Waveform IOPRecord Precedure REC/PLAY Checks Prior to Parts Replacement and AdjustmentsForced Reset Retry Cause Display Mode PrecedureHexadecimal nBinary Conversion Table Front view Rear view Section GeneralLocation of Controls 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 GroupMID Operating the Continuous Playback ModeNon-Volatile Memory Mode EEP Mode 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 IC PIN Function Description Section DiagramsBD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP 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 DigitalPlay Digital OUT Block Diagram Main Section∙ Signal Path Play Analog 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 RV760209 4-988-466-21 Spring ELECTROSTATIC, Leaf 206 201204 205 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
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