Sony MDS-PC2 User Manual

MDS-PC2

SERVICE MANUAL

SPECIFICATIONS

US Model

Canadian Model

AEP Model

UK Model

E Model

Model Name Using Similar Mechanism MDS-S40 MD Mechanism Type MDM-5A Optical Pick-up Type KMS-260B/J1N

MICROFILM

— Continued on next page —

MINIDISC DECK

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 “Procedure for using the SelfDiagnosis 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 required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally , press the p “PROGRAM” b utton to exit the mode.

1. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button and p button.

2. Press the + button and when “[Service]” is displayed, press the ^ “PROGRAM” button.

3. Press the + button and display “ERR DP MODE”.

4. Pressing the ^ “PROGRAM” button sets the error history mode and displays “total rec”.

5. Select the contents to be displayed or executed using the + button.

6. Pressing the r “PROGRAM” button will display or execute the contents selected.

7. Pressing the r “PROGRAM” button another time returns to step 4.

8. Pressing the p “PROGRAM” button displays “ERROR DP MODE” and exits the error history mode.

9. To exit the test mode, press the 6 “1” button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.

*Note:

As this unit has only a few buttons, one button is assigned with several functions in the test mode. Press the INPUT button to switch the functions. Each time the INPUT button is pressed, the display switches in the following order; “PROGRAM” n “1” n blank n “PROGRAM” The functions of each button change with the display. For simplicity, operations of the INPUT button will not be described here. Instead, symbols are added to the names of buttons. Press the INPUT button as required to switch the display.

Example) p “PROGRAM” : Display “PROGRAM” and press the p button. p “1” : Display “1” and press the p button.

ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS

Selecting the Test Mode

Display

total rec

total play

retry err

total err

err history

er refresh

Details of History

Displays the recording time. Displayed as “rππππππh”. 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.

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

Displays the total number of retries during recording and number of retry errors during play. Displayed as “rππ pππ”. “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.

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

Displays the 10 latest errors. Displayed as “0π E@@”. π 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 pressing the + button.

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 r “PROGRAM” button and “er refresh?” is display ed, press the ^ “PROGRAM” 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

Table of Error Codes

Error Code

E00 E01

E02

E03 E04

No error Read error. PTOC cannot be read (DISC ejected) TOC error. UTOC error (DISC not ejected) Loading error Address cannot be read (Servo has deviated)

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 ^ “PROGRAM” button and “tm refresh?” is displayed , press the r “PR OGRAM” b utton 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.

Details of Error

Error Code

E05 E06 E07 E08 E09

E0A

Details of Error

FOK has deviated Cannot focus (Servo has deviated) Recording retry Recording retry error Playback retry error (Access error) Play retry error (C2 error)

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the equipment manufacturer. Discard used batteries according to manufacture’s instructions.

ADVARSEL!

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.

Udskiftning må kun ske med batteri af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

ADVARSEL

Eksplosjonsfare ved feilakting skifte av batteri.

Benytt samme batteritype eller en tilsvarende type anbefalt av

apparatfabrikanten.

Brukte batterier katterier kasseres i henhold til fabrikantens

VARNIG

Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt gällande föreakrifter.

VAROITUS

Parist voi räjähtää, jos se on virheellisesti asennettu. V aihda paristo ainoastaan laite valmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

This caution label is located inside the unit.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of soldering iron around 270˚C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!! LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT . NE REMPLA CER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

MODEL IDENTIFICATION — MODEL NUMBER LABEL —

Parts No.

PARTS No. MODEL

4-220-576-0π US model 4-220-577-0π Canadian model 4-220-578-0π AEP, UK model 4-220-579-0π Singapore model

SAFETY CHECK-OUT

TABLE OF CONTENTS

After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for A C leakage. Check leaka ge as described below.

LEAKAGE

The AC leakage from any exposed metal part to earth Ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a V OM or battery-operated A C v oltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

0.15µF

1.5k

Ω

AC voltmeter (0.75V)

1. SERVICING NOTE .......................................................... 6

2. GENERAL ........................................................................12

3. DISASSEMBLY

3-1. Case and Front Panel .......................................................... 14

3-2. MD Mechanism .................................................................. 14

3-3. Slider (CAM) ......................................................................15

3-4. Base Unit (MBU-5A) BD Board ........................................ 15

3-5. SW Board and Loading Motor (M103) .............................. 16

4. TEST MODE ..................................................................... 17

5. ELECTRICAL ADJUSTMENTS ...............................22

6. DIAGRAMS

6-1. Circuit Boards Location ...................................................... 31

6-2. Block Diagrams

• BD Section ....................................................................... 33

• Main Section .................................................................... 34

6-3. Printed Wiring Board – BD Section –................................. 36

6-4. Schematic Diagram – BD (1/2) Section –........................... 37

6-5. Schematic Diagram – BD (2/2) Section –........................... 38

6-6. Schematic Diagram – Main (1/2) Section –........................ 39

6-7. Schematic Diagram – Main (2/2) Section –........................ 40

6-8. Printed Wiring Board – Main Section –.............................. 41

6-9. Schematic Diagram – Panel Section – ................................ 42

6-10. Printed Wiring Board – Panel Section – ............................ 43

6-11. Schematic Diagram – Power Section – ............................. 44

6-12. Printed Wiring Board – Power Section – .......................... 45

6-13. Schematic Diagram – BD Switch Section – ..................... 46

6-14. Printed Wiring Board – BD Switch Section –................... 46

6-15. IC Block Diagrams ........................................................... 46

6-15. IC Pin Functions ............................................................... 49

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

7. EXPLODED VIEWS

7-1. Cabinet Section ................................................................... 53

7-2. Mechanism Section (MDM-5A) ......................................... 54

7-3. Base Unit Section (MBU-5A)............................................. 55

8. ELECTRICAL PARTS LIST ........................................ 56

SECTION 1

SERVICING NOTE

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) TEO : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter)

Mechanism deck

TEO

IOP

I+3V

GND

RF VC TEO

5P connector

CN110

6P connecto

RF VC TEO For MDMIOP I+3V

VC RF TEO

For MDM-5

IOP I+3V

GND

IOP I+3V

GND

IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OF BD BOARD) ARE REPLACED

The IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC171 of BD board), record the IOP value on the optical pick-up according to the following procedure.

Record Precedure:

1. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button and p button.

2. Press the + button to display “[Service]”, and press the ^ “PROGRAM” button.

3. Press the + button to display “lop.Write”, and press the ^ “PROGRAM” button.

4. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.

5. Input the IOP value written on the optical pick-up. To select the number : Press the + button. To select the digit : Press the r “PROGRAM” button.

6. When the ^ “PROGRAM” button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).

7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the ^ “PROGRAM” button.

8. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write”.

9. Press the 6 “1” button to complete. “Standby” will be displayed.

Display Precedure:

1. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button and p button.

2. Press the + button to display “[Service]”, and press the ^ “PROGRAM” button.

3. Press the + button to display “lop.Read”, and press the ^ “PROGRAM” button.

4. “@@.@/##.#” is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the pick-up. ##.# : indicates the Iop value after adjustment

5. To end, press the r “PROGRAM” button or p “PROGRAM” button to display “Iop Read”. Then press the 6 “1” buttun.

*Note:

Example) p “PROGRAM” : Display “PROGRAM” and press the p button. p “1” : Display “1” and press the p button.

CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

Laser power check (5-6-2 : See page 37)

Traverse check (5-6-3 : See page 37) Focus bias check (5-6-4 : See page 38)

C PLAY check (5-6-5 : See page 38)

Self-recording/playback check (REC/PLAY) (5-6-6 : See page 38)

TEMP check (Temperature compensation offset check) (5-6-1 : See page 37)

Criteria for Determination (Unsatisfactory if specified value is not satisfied)

• 0.9 mW power Specified value : 0.84 to 0.92 mW

• 7.0 mW power Specified value : 6.8 to 7.2 mW lop (at 7mW)

• Labeled on the optical pickup Iop value ± 10mA

• Traverse waveform Specified value : Below 10% offset

• Error rate check Specified value : For points a, b, and c C1 error : Below 220 AD error : Below 2

• Error rate check Specified value: a.When using test disc (MDW-74/AU-1)

C1 error : Below 80 AD error : Below 2

b.When using check disc (TDYS-1)

C1 error : Below 50

• CPLAY error rate check Specified value: C1 error : Below 80 AD error : Below 2

• Unsatisfactory if displayed as T=@@ (##) [NG” NG (@@, ## are both arbitrary numbers)

Measure if unsatisfactory:

• Clean the optical pick-up

• Adjust again

• Replace the optical pick-up

If always unsatisfactory:

• Replace the overwrite head

• Check for disconnection of the circuits around the overwrite head

If occasionally unsatisfactory:

• Check if the overwrite head is distorted

• Check the mechanism around the sled

• Check for disconnection of the circuits around D101 (BD board)

• Check the signals around IC101, IC121, CN102, CN103 (BD board)

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.

FORCED RESET

The system microprocessor can be reset in the following procedure. Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. The line output level and PHONES output level can be varied in the range from 0 dB to -40 dB using the remote commander of this unit. When forced reset is executed, these levels will be set to the initial value of -20 dB.

Procedure :

1. Disconnect the power plug from the outlet.

2. Remove the BACK UP board.

3. Insert the power plug into the outlet.

4. Mount the back up board.

5. Press the I/u button. When “Initialize” is displayed, it means that forced reset has been executed.

[POWER BOARD] (Component Side)

Back up board

FLUORESCENT DISPLAY TUBE ALL LIGHTING AND KEY CHECK MODE

In this mode, the fluorescent display tube check and key check can be performed.

Procedure:

1. While pressing the INPUT button and r (REC) button, insert the power plug into the outlet.”

2. The fluorescent display tube displays “FL ALL 10n Key” momentarily and lights up completely.”

3. The display goes off partially each time a button is pressed.

4. When all buttons are pressed, “Push INPUT” is displayed.

5. When the INPUT button is pressed, the fluorescent display tube displays “Seg Chk” momentarily and lights up partially.

6. When the INPUT button is pressed, it displays “Rmk Chk” momentarily followed by “Push Rmc Key”. If not using a remote commander, end there and disconnect the power plug from the outlet. If using a remote commander, press any button.”

7. The check is completed when “Chk End!”is displayed. Press the I/u button to end.”

RETRY CAUSE DISPLAY MODE

• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set. This is useful for locating the faulty part of the unit.

• The following will be displayed : During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright. These are displayed in hexadecimal.

Precedure:

1. Load a recordable disc whose contents can be erased into the unit.

2. For discs with no disc name, set the name display using the remote commander. (The time display is set after some time. Leave as it is if

desired.)

3. Press the p button immediately . W ait for a bout 10 seconds while pressing the button. (The AMS knob can be pressed instead of the YES

button for the same results.)

4. The fluorescent display tube displays “RTs@@c##e**”.

5. Press the r button to start recording. Then press the ^ button and start recording.

6. To check the “track mode”, press the ^ button to start play.

7. To exit the test mode, press the 1/u button. If the test mode cannot be exited, refer to “Forced Reset” on page 8.

Fig. 1 Reading the Test Mode Display (During recording and stop)

RTs@@c##c**

Fluorescent display tube display

@@ : Cause of retry ## : Number of retries ** : Number of retry errors

Higher Bits Lower Bits

Hexadecimal

Bit

Binary

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001

00000010

00000100 00001000 00010000 00100000 01000000 10000000

Hexa-

decimal

04 08 10 20 40 80

Fig. 2 Reading the Test Mode Display (During playback)

@@####**$$

Fluorescent display tube display

@@ : Parts No. (name of area named on TOC) ## : Cluster ** : Sector $$ : Track mode (Track information such as copyright infor-

Reading the Retry Cause Display

Cause of Retry Occurring conditions

shock

ader5

Discontinuous address DIN unlock FCS incorrect IVR rec error CLV unlock Access fault

} Address (Physical address on disc)

mation of each part)

When track jump (shock) is detected When ADER was counted more than five times continuously When ADIP address is not continuous When DIN unlock is detected When not in focus When ABCD signal level exceeds the specified range When CLV is unlocked When access operation is not performed normally

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example

When 42 is displayed: Higher bit : 4 = 0100 n b6 Lower bit : 2 = 0010 n b1 In this case, the retry cause is combined of “CLV unlock” and “ader5”.

When A2 is displayed: Higher bit : A = 1010 n b7+b5 Lower bit : 2 = 0010 n b2 The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.

Reading the Track Mode Display

Higher Bits Lower Bits

Hexadecimal

Bit

Binary

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example When 84 is displayed:

Higher bit : 8 = 1000 n b7 Lower bit : 4 = 0100 n b2 In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis OFF”, “monaural”, “original”, “copyright exists”, and “write allowed”.

Example When 07 is displayed:

Higher bit : 0 = 1000 n All 0 Lower bit : 7 = 0111 n b0+b1+b2 In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis ON”, “stereo”, “original”, “copyright exists”, and “write prohibited”.

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000

Hexa-

decimal

01 02 04 08 10 20 40 80

When 0 When 1

Emphasis OFF Monaural This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid Audio (Normal) Original Copyright Write prohibited

Details

Emphasis ON Stereo

Invalid Digital copy No copyright Write allowed

Hexadecimal n Binary Conversion Table

Hexadecimal Binary Hexadecimal Binary

0 1 2 3 4 5 6 7

0000 0001 0010 0011 0100 0101 0110 0111

9 A B C D E F

1000 1001 1010 1011 1100 1101 1110 1111

Front Panel

SECTION 2

GENERAL

This section is extracted from instruction manual.

Location of Parts and Controls

1011

SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

3-1. CASE AND FRONT PANEL

Two screws

(Flat head)

Case

Two screw

(Flat head)

Screw

(BTT M3)

Front panel

(Take not of two claws)

Two screws

(BTT M3)

3-2. MD MECHANISM

Two step screws

Screw

(M2 x 6.0)

Claw

MD mechanism

Flat type wire

(CN701)

Screw

(M2 x 6.0)

Two step screws

Claw

Main board

Screw

(BVTP 3 x 8)

Flat type wire

(CN421)

Screw

(BVTP 3 x 8)

Connector 8P

(CN503)

(CN412)

Flat type wire

(CN501)

Flat type wir

3-3. SLIDER (CAM)

Bracket (Guide L)

T wo screws

(BTP 2.6 x 6)

Slider (Cam)

• Note for Installation of Slider (Cam)

Set the shaft of Cam gear to be at the position in the figure.

Leaf spring

3-4. BASE UNIT (MBU-5A) AND BD BOARD

Bracket (Guide R)

Set the shaft of Lever (O/C) to be at the position in the figure.

T wo screws

(BTP 2.6 x 6)

Flexible board

(CN104)

Flexible board

(CN101)

(BTP2.6 x 6)

Screw (M1.7 x 4)

Three screws

BD board

Base unit (MBU-5A)

Remove the solder (Five position)

3-5. SW BOARD AND LOADING MOTOR (M103)

)

T wo screws

(PWH 1.7 x 3)

SW board

Gear B

Screw (PTPWH M2.6 x 6)

Loading motor (M103

Three screws

(BTP2.6 x 6)

SECTION 4

TEST MODE

*Note:

As this unit has only a few buttons, one button is assigned with several functions in the test mode.” Press the INPUT button to switch the functions. Each time the INPUT button is pressed, the display switches in the following order;” “PROGRAM” n “1” n blank n “PROGRAM” The functions of each button change with the display.

Buttons and Corresponding Functions

Buttons

1/u 6 (EJECT) ^ = + p (STOP) r (REC)

Function when nothing displayed

1/u 6 (EJECT) ^ = (AMS) + (AMS) p (STOP) r (REC)

Function when “PROGRAM” is displayed

CLEAR ENTER/YES

0 (FR) ) (FF)

EDIT/NO PUSH (AMS)

Function when “1” is displayed

TIME REPEAT PLAY MODE

DISPLAY SCROLL

4-1. PRECAUTIONS FOR USE OF TEST MODE

• As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the 6 (EJECT) button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the 6 (EJECT) button after pressing the p “PROGRAM” button and the rotation of disc is stopped.

4-1-1. Recording laser emission mode and operating buttons

• Continuous recording mode (CREC MODE)

• Laser power check mode (LDPWR CHECK)

• Laser power adjustment mode (LDPWR ADJUST)

• Traverse (MO) check (EF MO CHECK)

• Traverse (MO) adjustment (EF MO ADJUST)

• When pressing the r (REC) button.

4-2. SETTING THE TEST MODE

The following are two methods of entering the test mode. Procedure 1:While pressing the INPUT button and p button, connect the power plug to an outlet, and release the INPUT button and p

button. When the test mode is set, “[Check]” will be displayed. Rotating the INPUT button switches between the following four groups; ···Nn Check Nn Adjust Nn Service Nn Develop Nn ···.

Procedure 2:While pressing the INPUT button, connect the power plug to the outlet and release the INPUT button.

When the test mode is set, “TEMP CHECK” will be displayed. By setting the test mode using this procedure, only the “Check” group of procedure 1 can be executed.

4-3. EXITING THE TEST MODE

Press the p “1” button. The disc is ejected when loaded, and “Standby” display blinks, and the STANDBY state is set.

4-4. BASIC OPERATIONS OF THE TEST MODE

All operations are performed using the = , + button, ^ “PROGRAM” button, and p “PROGRAM” button. The functions of these buttons are as follows.

Function name

= , + button ^ “PROGRAM” button p “PROGRAM” button

Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.

Function

4-5. SELECTING THE TEST MODE

There are 27 types of test modes as shown below. The groups can be switched by pressing the = and = buttons. After selecting the group to be used, press the ^ “PROGRAM” button. After setting a certain group, pressing the = and = buttons switches between these modes. Refer to “Group” in the table for details selected. All items used for servicing can be treated using group S. So be carefully not to enter other groups by mistake.

Display

TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK S curve CHECK VERIFY MODE DETRK CHECK TEMP ADJUST LDPWR ADJUST EF MO ADJUST EF CD ADJUST FBIAS ADJUST EEP MODE MANUAL CMD SVDATA READ ERR DP MODE SLED MOVE Inpossible ADJ CLEAR AG Set (MO) AG Set (CD) Iop Read Iop Write INFORMATION CPLAY MODE CREC MODE

Contents

Temperature compensation offset check Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S letter check Non-volatile memory check Detrack check Temperature compensation offset adjustment Laser power adjustment Traverse (MO) adjustment Traverse (CD) adjustment Focus bias adjustment Non-volatile memory control Command transmission Status display Error history display, clear Sled check No function Initialization of non-volatile memory of adjustment value Auto gain output level adjustment (MO) Auto gain output level adjustment (CD) IOP data display IOP data write Microprocessing version display Continuous play mode Continuous recording mode

Mark

(X) (X) (X)

(X) (!) (X) (X)

(X) (X)

Group (*)

CS CS CS CS CS C C C

AS AS AS AS AS

D D D

D AS AS AS

CS CASD CASD

Group (*)

C: Check S: Service

A: Adjust D: Develop

• For details of each adjustment mode, refer to “5. Electrical Adjustments”. For details of “ERR DP MODE”, refer to “Self-Diagnosis Function” on page 2.

• If a different mode has been selected by mistake, press the p “PROGRAM” button to exit that mode.

• Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the p “PROGRAM” button to e xit the mode immediately. Be especially careful not to set the modes with (!) as they will overwrite the non-volatile memory and reset it, and as a result, the unit will not operate normally.

4-5-1. Operating the Continuous Playback Mode

1. Entering the continuous playback mode

1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Press the + button and display “CPLAY MODE”. 3 Press the ^ “PROGRAM” button to change the display to “CPLAY MID”. 4 When access completes, the display changes to “C1 = AD = ”.

Note : The numbers “ ” displayed show you error rates and ADER.

2. Changing the parts to be played back 1 Press the ^ “PROGRAM” button during continuous playback to change the display as below.

“CPLAY MID” n “CPLAY OUT” n “CPLAY IN”

When pressed another time, the parts to be played back can be moved.

2 When access completes, the display changes to “C1 = AD = ”. Note : The numbers “ ” displayed show you error rates and ADER.

3. Ending the continuous playback mode

1 Press the p “PROGRAM” button. The display will change to “CPLAY MODE”. 2 Press the 6 (EJECT) button to remove the disc.

Note : The playback start addresses for IN, MID, and OUT are as follows.

IN 40h cluster MID 300h cluster OUT 700h cluster

4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check.)

1. Entering the continuous recording mode

1 Set a recordable disc in the unit. 2 Press the + button and display “CREC MODE”. 3 Press the ^ “PROGRAM” button to change the display to “CREC MID”. 4 When access completes, the display changes to “CREC ( )” and REC lights up.

Note : The numbers “ ” displayed shows you the recording position addresses.

2. Changing the parts to be recorded 1 When the + “PROGRAM” button is pressed during continuous recording, the display changes as below.

“REC MID” n “REC OUT” n “REC IN”

When pressed another time, the parts to be recorded can be changed. REC goes off.

2 When access completes, the display changes to “CREC ( ” and REC lights up. Note : The numbers “ ” displayed shows you the recording position addresses.

3. Ending the continuous recording mode

1 Press the p “PROGRAM” button. The display changes to “CREC MODE” and REC goes off. 2 Press the 6 (EJECT) button to remove the disc.

Note 1 : The recording start addresses for IN, MID, and OUT are as follows.

IN 40h cluster MID 300h cluster OUT 700h cluster

Note 2 :The p “PROGRAM” button can be used to stop recording anytime. Note 3 :Do not perform continuous recording for long periods of time above 5 minutes. Note 4 :During continuous recording, be careful not to apply vibration.

4-5-3. Non-Volatile Memory Mode (EEP MODE)

This mode reads and writes the contents of the non-volatile memory. It is not used in servicing. If set accidentally, press the p “PROGRAM” button immediately to exit it.

4-6. FUNCTIONS OF OTHER BUTTONS

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)

Function

p + “PROGRAM” * = “PROGRAM” *

r “1” * ^ “1” * p “1”

6 (EJECT) 6 “1” *

Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed. Switches between the pit and groove modes when pressed. Switches the spindle servo mode (CLV S ˜ CLV A). Switches the displayed contents each time the button is pressed Ejects the disc Exits the test mode

Contents

*Note:

4-7. TEST MODE DISPLAYS

Each time the p “1” 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.

C1 = AD = C1 = 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 r “1” button switches between the groove display and pit display. h = s = (MO pit and CD) h = a = (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address.

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

4. Auto gain display (Not used in servicing)

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

5. Detrack check display (Not used in servicing)

The detrack is displayed as follows. ADR =

6. IVR display (Not used in servicing)

The IVR is displayed as follows. [ ][ ][

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