Sony MDS-JB920 Functions of Other Buttons, Test Mode Displays, IVR display Not used in servicing

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6. FUNCTIONS OF OTHER BUTTONS

	Function	Contents
	á	Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo
	á	turns ON/OFF.
		turns ON/OFF.
	p	Stops continuous playback and continuous recording.
	)	The sled moves to the outer circumference only when this is pressed.
	0	The sled moves to the inner circumference only when this is pressed.
	SCROLL/CLOCK SET	Switches between the pit and groove modes when pressed.

	PLAY MODE	Switches the spindle servo mode (CLVS ÷CLV A).
	DISPLAY/CHAR	Switches the displayed contents each time the button is pressed
	¤ EJECT	Ejects the disc
	REPEAT	Exits the test mode

7. TEST MODE DISPLAYS

Each time the [DISPLAY/CHAR] button is pressed, the display changes in the following order.

1. Mode display

Displays “TEMP ADJUST”, “CPLAYMODE”, etc.

2. Error rate display

Displays the error rate in the following way. C = ¹¹¹¹AD = ¹¹¹¹

C = Indicates the C1 error. AD = Indicates ADER.

3. Address display

The address is displayed as follows. (MO: recordable disc, CD: playback only disc)

Pressing the [SCROLL/CLOCKÊSET] button switches between the group display and bit display. h = ¹¹¹¹ s = ¹¹¹¹ (MO pit and CD)

h = ¹¹¹¹ a = ¹¹¹¹ (MO groove) h = Indicates the header address.

s = Indicates the SUBQ address. a = Indicates the ADIP address.

Mode display

Error rate display

Address display

Auto gain display

(Not used in servicing)

Detrack check display (Not used in servicing)

IVR display

(Not used in servicing)

Note: “–” is displayed when servo is not imposed.

4.Auto gain display (Not used in servicing)

The auto gain is displayed as follows. AG = ¹¹/¹¹¹¹[ ¹¹

5.Detrack check display (Not used in servicing)

The detrack is displayed as follows. ADR = ¹¹¹¹¹¹¹

6.IVR display (Not used in servicing)

The IVR is displayed as follows.

[¹¹][¹¹][¹¹

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Contents Specifications MDS-JE520MDM-5A General SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Table of Contents DiagramsSection Servicing Notes Flexible Circuit Board Repairing VarningVaroitus IOP JIG for Checking BD Board WaveformRecord Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetREC/PLAY Precedure Retry Cause Display ModeHexadecimal nBinary Conversion Table Section General Location of ControlsFront view Rear view Page Page Case Section DisassemblyMain Board Front Panel SecitonSlider CAM Mechanism Section MDM-5ASW BOARD, Loading Motor M103 Base Unit MBU-5A, BD BoardPrecautions for USE of Test Mode Section Test ModeSetting the Test Mode Exiting the Test ModeDisplay Contents Mark Group Selecting the Test ModeOperating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeMID Functions of Other Buttons Test Mode DisplaysAuto gain display Not used in servicing Detrack check display Not used in servicingMeanings of Other Displays Display Contents When Lit When OffParts Replacement and Adjustment Section Electrical AdjustmentsPrecautions for USE of Optical PICK-UP KMS-260A Precautions for Checking Laser Diode EmissinonPrecautions for Adjustments Laser power meterLaser Power Check Temperature Compensation Offset CheckCheck Prior to Repairs Traverse CheckCD Error Rate Check Play Checking MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckTemperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Section Diagrams BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMPIC PIN Function Description Sens SrdtXrst SqsyXWE XrasMvci AsyoSfdr SrdrSprd SpfdMain Board IC100 CXD8607N A/D Converter VDD1 AvddlTEST2 LvddMain Board IC800 M30610MCA-264FP System Controller MDS-JB920 ∙ Signal Path Block Diagram Servo SectionREC Analog REC DigitalBlock Diagram Main Section ∙ Signal Path Play Analog OUTPlay 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 SeeWaveforms 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 Printed Wiring Board BD Switch Section Schematic Diagram BD Switch SectionIC Block Diagrams BD Board IC101 CXA2523ARIC152 BH6511FS-E2 IC121 CXD2654RIC101 CXA8054M Main Board IC100 CXD8607NIC203 CXA8042ASIC200 CXD8767N SN74HCU04ANS-E20 SN74HC153ANSChassis Section Section Exploded ViewsSupplied with RV760 Front Panel Section206 201 204 205209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List Diode TANTAL. ChipDiode F1J6TP CXA2523ARDisp Main C252 Mylar HZ7.5CP-TK HZS6C1LCXA8042AS SN74HC153ANS390 Coil with Core Vibrator Main PSWLED SEL6210S-TH10 Standby LED SEL6810A-TH10 Mega Control TransistorSW VOL Sony Corporation