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Sony MDS-JB920 3, Items of Error History Mode Items and Contents, Selecting the Test Mode

Models: MDS-JB920

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Items of Error History Mode Items and Contents

Selecting the Test Mode

Display						Details of History
total rec			Displays the recording time.
			Displayed as “r ¹¹¹¹¹¹h”.
			The displayed time is the total time the laser is set to the high power state.
			This is about 1/4 of the actual recording time.
			The time is displayed in decimal digits from 0h to 65535h.

total play			Displays the play time.
			Displayed as “p ¹¹¹¹¹¹h”. The time displayed is the total actual play time. Pauses are not counted.
			The time is displayed in decimal digits from 0h to 65535h.

retry err			Displays the total number of retries during recording and number of retry errors during play.
			Displayed as “r ¹¹ p¹¹”.
			“r” indicates the retries during recording while “p” indicates the retry errors during play.
			The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.

total err			Displays the total number of errors.
			Displayed as “total ¹¹”.
			The number of errors is displayed in hexadecimal digits from 00 to FF.

err history			Displays the 10 latest errors.
			Displayed as “0 ¹ E@@”.
			¹ indicates the history number. The smaller the number, the more recent is the error. (00 is the latest).
			@@ indicates the error code.
			Refer to the following table for the details. The error history can be switched by rotating the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ±
			knob.

er refresh			Mode which erases the “retry err”, “total err”, and “err history” histories.
			When returning the unit to the customer after completing repairs, perform this to erase the past error history.
			After pressing the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± button and “er refresh?” is displayed, press the [YES] button to erase the
			history.
			“Complete!” will be displayed momentarily.
			Be sure to check the following when this mode has been executed.
			•	The data has been erased.
			•	The mechanism operates normally when recording and play are performed.

tm refresh			Mode which erases the “total rec” and “total play” histories.
			These histories serve as approximate indications of when to replace the optical pickup.
			If the optical pickup has been replaced, perform this operation and erase the history.
			After pressing the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± button and “tm refresh?” is displayed, press the [YES] button to erase the
			history.
			“Complete!” will be displayed momentarily.
			Be sure to check the following when this mode has been executed.
			•	The data has been erased.
			•	The mechanism operates normally when recording and play are performed.

Table of Error Codes

Error Code				Details of Error		Error Code		Details of Error
E00		No error				E05		FOK has deviated

E01		Disc error. PTOC cannot be read				E06		Cannot focus (Servo has deviated)

		(DISC ejected)				E07		Recording retry
						E07		Recording retry

E02		Disc error. UTOC error				E08		Recording retry error

		(DISC not ejected)				E09		Playback retry error
						E09		Playback retry error
								(Access error)
E03		Loading error						(Access error)
E03		Loading error

E04		Address cannot be read (Servo has deviated)				E0A		Playback retry error (C2 error)

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Sony MDS-JB920 3, Items of Error History Mode Items and Contents, Selecting the Test Mode, Table of Error Codes

Contents

MINI DISC DECK SPECIFICATIONSSERVICE MANUAL MDS-JB920– 2 – SELF-DIAGNOSISFUNCTIONSelecting the Test Mode Items of Error History Mode Items and Contents– 3 – Table of Error CodesDISASSEMBLY TABLE OF CONTENTS6.DIAGRAMS SECTION SERVICING NOTESADVARSEL – 5 –Flexible Circuit Board Repairing Notes on chip component replacementJIG FOR CHECKING BD BOARD WAVEFORM – 7 – Record PrecedureDisplay Precedure Procedure Checks Prior to Parts Replacement and AdjustmentsForced Reset – 8 –Fig. 1 Reading the Test Mode Display – 9 –Retry Cause Display Mode Precedure– 10 – Reading the DisplayHexadecimal nBinary Conversion Table • Front view • Rear view SECTION GENERAL– 11 – LOCATION OF CONTROLS– 12 – – 13 – SECTION – 14 –CASE DISASSEMBLY– 15 – FRONT PANEL SECITONMAIN BOARD – 16 – MECHANISM SECTION MDM-5ASLIDER CAM – 17 – BASE UNIT MBU-5A,BD BOARDSW BOARD, LOADING MOTOR M103 – 18 – 1. PRECAUTIONS FOR USE OF TEST MODE2. SETTING THE TEST MODE SECTION TEST MODE5. SELECTING THE TEST MODE – 19 –– 20 – 5-1.Operating the Continuous Playback Mode5-3. Non-VolatileMemory Mode EEP MODE 4.Auto gain display Not used in servicing – 21 –6. FUNCTIONS OF OTHER BUTTONS 7. TEST MODE DISPLAYSMEANINGS OF OTHER DISPLAYS – 22 –SECTION ELECTRICAL ADJUSTMENTS 1.PARTS REPLACEMENT AND ADJUSTMENT– 23 – – 24 – 2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSINON4. PRECAUTIONS FOR ADJUSTMENTS Laser power meterChecking Procedure – 25 –6. CHECK PRIOR TO REPAIRS 6-1.Temperature Compensation Offset Check6-4.Focus Bias Check – 26 –6-5.C PLAY Checking MO Error Rate Check CD Error Rate Check– 27 – 7. INITIAL SETTING OF ADJUSTMENT VALUE9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT 10. LASER POWER ADJUSTMENTConnection 11. TRAVERSE ADJUSTMENTSpecification Adjusting Procedure– 29 – 12.FOCUS BIAS ADJUSTMENT14. FOCUS BIAS CHECK 13.ERROR RATE CHECK15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT – 30 –BD BOARD SIDE B 16. ADJUSTING POINTS AND CONNECTING POINTS– 31 – BD BOARD SIDE ASECTION DIAGRAMS – 32 –6-1.IC PIN FUNCTION DESCRIPTION •BD BOARD IC121 CXD2654R – 33 –– 34 – – 35 – •MAIN BOARD IC100 CXD8607N A/D CONVERTER – 36 –– 37 – – 38 – MDS-JB920 – 39 –– 40 – MDS-JB920 BLOCK DIAGRAM – SERVO Section –– 41 – – 42 –MDS-JB920 6-3.BLOCK DIAGRAM – MAIN Section –– 43 – – 44 –Note on Schematic Diagram – 45 –– 46 – • Circuit Boards Location•See page 45 for Circuit Boards Location 6-5.PRINTED WIRING BOARDS – BD Section –– 47 – – 48 –Page – 49 –– 50 – MDS-JB920MDS-JB920 6-7.SCHEMATIC DIAGRAM – BD Section 2/2 – See•– 51 – – 52 –• Waveforms – 53 –– 54 – MDS-JB920Page Page Page Page Page Page – 55 –– 56 – MDS-JB920– 57 – – 58 –MDS-JB920 Page Page Page Page – 59 –– 60 – MDS-JB920– 61 – – 62 –MDS-JB920 – 63 – MDS-JB920• Semiconductor Location US, CND – 66 –MDS-JB920 US, CNDPage Page Page Page – 67 –– 68 – MDS-JB920– 70 – 6-15.SCHEMATIC DIAGRAM - BD SWITCH SectionPRINTED WIRING BOARD – BD SWITCH Section – – 69 –IC152 BH6511FS-E2 – 71 –IC121 CXD2654RCXD8607N – 72 –– MAIN Board – IC100– 73 – IC200CXD8767N LA5632 IC300SN74HC153ANS IC7002 16 17 18 SECTION EXPLODED VIEWS– 75 – 1 CHASSIS SECTION 56– 76 – 2 FRONT PANEL SECTION 6359 58 206 201 – 77 –3MECHANISM SECTION MDM-5A 223 207 203 225– 78 – 4BASE UNIT SECTION MBU-5A 252254 SECTION ELECTRICAL PARTS LIST AC BAT BD– 79 – – 80 – – 81 – DISP– 82 – MAINMAIN MAIN – 84 –MAIN – 85 –MAIN – 87 – SW VOLHome A&V Products Company MDS-JB920Sony Corporation 9-922-869-11