Sony HCDMDX-10 Service manual

HCD-MDX10

SERVICE MANUAL

HCD-MDX10 is the tuner, deck, CD, MD and amplifier section in MHC-MDX10.

Model Name Using Similar Mechanism NEW

SECTION

TAPE DECK

SECTION

Mechanism Type CDM38LH-5BD32L Base Unit Type BU-5BD32L Optical Pick-up Type KSS-213D/Q-NP Model Name Using Similar Mechanism MDS-JE520 Mechanism Type MDM-5A Optical Pick-up Type KMS-260A/K1NP Model Name Using Similar Mechanism HCD-DR4/DR5/DR6/DR440/

T ape Transport Mechanism Type TCM-230AWR2/230PWR2

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

W300/W5000/XB500

SPECIFICATIONS

COMPACT DISC DECK RECEIVER

— Continued on next page —

MICROFILM

– 1 –

– 2 –

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 MENU/NO button to exit the mode.

1. With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together.

2. Rotate the AMS dial and when “Service” is displayed, press the YES button.

3. Rotate the AMS dial and display “ERR DP MODE”.

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

5. Select the contents to be displayed or executed using the AMS dial.

6. Pressing the MD WALKMAN SYNC button will display or execute the contents selected.

7. Pressing the MD WALKMAN SYNC button 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/STEREO/MONO button.

– 3 –

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 rotating the AMS dial.

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 MD W ALKMAN SYNC button and “er refresh?” is displayed, press the ENTER/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

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 ENTER/AMS button and “tm refresh?” is displayed, press the MD WALKMAN SYNC 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.

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)

– 4 –

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.

This caution label is located inside the unit.

MODEL IDENTIFICATION — BACK PANEL —

Parts No.

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.

P ARTS No.

MODEL

4-216-211-0π AEP, UK, G, CIS 4-216-211-1π E, SP, MY, HK, AR 4-216-211-2π US, CND, KR, AUS

• Abbreviation CND : Canadian model G : German model SP : Singapore model MY : Malaysia model HK : Hong Kong model AR : Argentine model KR : Korea model AUS : Australian model

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.

– 5 –

SAFETY CHECK-OUT

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 AC leakage. Check leakage 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 VOM or battery-operated AC voltmeter. 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

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveform is output four times.

0.15µF

1.5k

Ω

Earth Ground

AC voltmeter (0.75V)

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

– 6 –

TABLE OF CONTENTS

1. SERVICING NOTE .......................................................... 8

2. GENERAL ........................................................................ 14

3. DISASSEMBLY

3-1. Loading Panel ..................................................................... 16

3-2. MD Mechanism and Front Panel ........................................ 16

3-3. Cassette Lid and Tape Mechanism...................................... 17

3-4. MD Link, Power SW, CD Panel Boards and

Display Board ..................................................................... 17

3-5. Disc Tray ............................................................................. 18

3-6. Slider (CAM) ...................................................................... 18

3-7. Base Unit (MBU-5A) and BD (MD) Board .......................19

3-8. SW Board and Loading Motor (M103) .............................. 19

4. SERVICE MODE ............................................................20

5. TEST MODE (MD) ......................................................... 22

6. MECHANICAL ADJUSTMENTS .......................... 26

7. ELECTRICAL ADJUSTMENTS ............................... 27

8. DIAGRAMS

8-1. Circuit Boards Location ...................................................... 40

8-2. Block Diagrams

• BD (CD) Section .............................................................. 41

• BD (MD) Section (1) ....................................................... 43

• BD (MD) Section (2) ....................................................... 45

• Main Section .................................................................... 47

• Deck Section .................................................................... 49

• Display Section ................................................................ 51

• Main Power/Sub Power Section ...................................... 53

8-3. Printed Wiring Board – BD (CD) Section – ....................... 57

8-4. Schematic Diagram – BD (CD) Section – .......................... 59

8-5. Printed Wiring Board – BD (MD) Section – ...................... 61

8-6. Schematic Diagram – BD (MD) (1/2) Section – ................ 63

8-7. Schematic Diagram – BD (MD) (2/2) Section – ................ 65

8-8. Schematic Diagram – Main (1/4) Section – ........................ 67

8-9. Schematic Diagram – Main (2/4) Section – ........................ 69

8-10. Schematic Diagram – Main (3/4) Section – ..................... 71

8-11. Schematic Diagram – Main (4/4) Section – ..................... 73

8-12. Printed Wiring Board – Main Section – ........................... 75

8-13. Printed Wiring Board – Deck Section – ........................... 77

8-14. Schematic Diagram – Deck Section – .............................. 79

8-15. Printed Wiring Board – Leaf SW Section – ..................... 81

8-16. Schematic Diagram – Leaf SW Section – ........................ 81

8-17. Schematic Diagram – Display (1/2) Section – ................. 83

8-18. Schematic Diagram – Display (2/2) Section – ................. 85

8-19. Printed Wiring Board – Display Section – ....................... 87

8-20. Printed Wiring Board – MD Digital Section – ................. 89

8-21. Schematic Diagram – MD Digital (1/2) Section – ........... 91

8-22. PSchematic Diagram – MD Digital (2/2) Section – ......... 93

8-23. Schematic Diagram – BD Switch Section – ..................... 95

8-24. Printed Wiring Board – BD Switch Section – .................. 96

8-25. Printed Wiring Board – CD Motor Section – ................... 97

8-26. Schematic Diagram – CD Motor Section – ...................... 99

8-27. Printed Wiring Board – MD Link Section –................... 101

8-28. Schematic Diagram – MD Link Section – ..................... 103

8-29. Schematic Diagram – Power Section – .......................... 105

8-30. Printed Wiring Board – Power Section – ....................... 107

8-31. IC Block Diagrams ......................................................... 109

8-32. IC Pin Functions ............................................................. 112

9. EXPLODED VIEWS

9-1. Case Section ...................................................................... 119

9-2. Chassis Section ................................................................. 120

9-3. Front Panel Section ........................................................... 121

9-4. CD Mechanism Deck Section-1 (CDM38LH-5BD32L) .. 122 9-5. CD Mechanism Deck Section-2 (CDM38LH-5BD32L) .. 123

9-6. Base Unit Section (BU-5BD32L) ..................................... 124

9-7. TC Mechanism Section-1 (TCM230AWR2/230PWR2) .. 125 9-8. TC Mechanism Section-2 (TCM230AWR2/230PWR2) .. 126

9-9. MD Mechanism Section-1 (MDM-5A) ............................ 127

9-10. MD Mechanism Section-2 (MDM-5A) .......................... 128

10. ELECTRICAL PARTS LIST ............................... 129

– 7 –

SECTION 1

SERVICING NOTE

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF

Remove the Case.

Pull-out the disc tray.

Turn the cam to the direction

of arrow.

NOTE FOR INSTALLATION (ROTARY ENCODER)

BU cam

Groove

Note:When attaching the Base unit, Insert the section A into the groove of BU cam.

Section A

Note:When attaching the BU cam, engage the Rotary encoder switch as shown in the figure.

CD-TEXT

This unit is provided with a simple CD-TEXT display function. The CD-TEXT contents of 50 tracks are displayed on the fluorescent display tube. Since the function is simple, some special characters may not be displayed, or may be displayed as other characters.

– 8 –

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

CN110

6P connecto

5P connector

RF VC TEO For MDMIOP I-3V

IOP I+3V

GND

VC RF TEO

For MDM-5

IOP I+3V

GND

– 9 –

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. With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together.

2. Rotate the AMS dial to display “Service”, and press the ENTER/YES button.

3. Rotate the AMS dial to display “lop.Write”, and press the ENTER/YES 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 : Rotate the AMS dial. To select the digit : Press the MD WALKMAN SYNC button.

6. When the ENTER/YES 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 ENTER/YES 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 REPEAT/STEREO/MONO button to complete.

Display Precedure:

1. With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together.

2. Rotate the AMS dial to display “Service”, and press the YES button.

3. Rotate the AMS dial to display “lop.Read”.

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 MD WALKMAN SYNC button or MENU/NO button to display “Iop Read”. Then press the REPEAT/STEREO/ MONO button.

– 10 –

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 (7-6-2 : See page 29)

Traverse check (7-6-3 : See page 29) Focus bias check (7-6-4 : See page 30)

C PLAY check (7-6-5 : See page 30)

Self-recording/playback check (REC/PLAY) (7-6-6 : See page 30)

TEMP check (Temperature compensation offset check) (7-6-1 : See page 29)

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.

Procedure :

Disconnect the power plug, short-circuit both edge of BT921.

[MAIN BOARD] (Component Side)

IC801

BT921

– 11 –

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. Press the FUNCTION button and set the function to “MD”.

3. Press the MENU/NO button. When “Edit/Menu” is displayed on the fluorescent indicator tube, rotate the AMS dial to display “All

Erase?”.

4. Press the ENTER/YES button.

5. “All Erase??” is displayed on the fluorescent indicator tube.

6. Press the ENTER/YES button to display “Complete!!”, and press the p button immediately. Wait for about 10 seconds while pressing

the button.

7. When the “TOC” displayed on the fluorescent display tube goes off, release the p button.

8. Press the REC (MD) button to start recording. Then press the ^/MD button and start recording.

9. To check the “track mode”, press the ^/MD button to start play.

10. To exit the test mode, press the 1/u button, and turn OFF the power. When “TOC” disappears, disconnect the power plug from the

outlet. 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”.

– 12 –

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

1000 1001 1010 1011 1100 1101 1110 1111

– 13 –

Front Panel

SECTION 2

GENERAL

231

811

910

12 13

5354 50

62 61

51 4849

15 16

29 30

31 32

34 35

– 14 –

3639 37

LOCATION OF PARTS AND CONTROLS

1 1/u (POWER) button and indicator 2 REC button and indicator 3 REC IT button 4 CD-MD SYNC button 5 DISC SKIP/EX-CHANGE button 6 DISC 1 button and indicator 7 DISC 2 button and indicator 8 DISC 3 button and indicator 9 Disk compartment 10 § (Eject) (MD) button 11 MD WALKMAN SYNC button 12 § (Eject) (CD) button 13 MD WALKMAN LINK jack 14 Disc tray 15 SYNC BASS HIGH indicator 16 SYNC BASS LOW indicator 17 p button 18 ^/CD button and indicator 19 ^/MD button and indicator 20 TUNER/BAND button and indicator 21 CD NON-STOP button and indicator 22 KARAOKE PON/MPX button 23 SYNC EQ button

24 SYNC BASS button 25 REC P AUSE/START button and

indicator

26 DBFB button 27 GROOVE button 28 SURROND button 29 HI DUB button 30 CD-TAPE SYNC button 31 VOLUME knob 32 PHONES jack 33 ENTER/YES button and indicator 34 ) + button and indicator 35 NAME EDIT/CHAR button 36 JOG/0x) dial and

indicator

37 MENU/NO button 38 ) – button and indicator 39 CLEAR button 40 CD FLASH button 41 CD LOOP button 42 MIX MIC jack 43 TIMER SELECT button and indicator 44 CLOCK/TIMER SET button

45 MIC LEVEL knob 46 SPECTRUM ANAL YZER button 47 DISPLAY button 48 REPEAT STEREO/MONO button 49 DOLBY NR/PLAY MODE/PTY button 50 DIRECTION/EDIT/TUNER MEMORY

button

51 P FILE MEMORY button 52 GEQ CONTROL button 53 FILE SELECT button 54 EFFECT button 55 FUNCTION button and indicator 56 9/TAPE B button and indicator 57 (/TAPE B button and indicator 58 9/TAPE A button and indicator 59 (/TAPE A button and indicator 60 Remote sensor 61 SYNC EQ indicator 62 EFFECT indicator 63 Display Window 64 POWER SAVE/DEMO (STANDBY)

button

This section is extracted from instruction manual.

– 15 –

SECTION 3

)

DISASSEMBLY

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

3-1. LOADING PANEL

Claws

Loading panel

Pull-out the disc tray.

Turn the cam to the direction

of arrow.

3-2. MD MECHANISM AND FRONT PANEL

MD mechanism

!∞

Flat type wire

(CN303)

!¢

Flat type wire

(CN304)

!™

Screw (BVTP 3x10)

!§

Front panel

Wire

!¡

(BVTP 3x10)

Screw

Four step screws

Connector

(CN601)

Flat type wire

(CN102)

Flat type wire

(CN103)

Four screws

(BVTP 3x8)

Bracket (MDM)

Two screws

(BVTT3x6)

Screw (BVTT3x6

– 16 –

!£

Flat type wire

(CN501)

3-3. CASSETTE LID AND TAPE MECHANISM

Release

Cassette lid (R) block

Cassette lidr (L) block

Portion

Spring (R)

T wo screws

(BVTP2.6x8)

Three screws

(BVTP2.6x8)

T ape mechanism

Spring (L)

Releas

Note for installation

Portion

3-4. MD LINK, POWER SW, CD PANEL BOARDS AND DISPLAY BOARD

Power SW board

Knob (Jog)

(Two claws)

CD Panel board

(Two claws)

Nut

Knob (Vol)

Four screws

(BVTP2.6x8)

(Three claws)

!¢

Four screws

(BVTP2.6x8)

MD link SW board

!¡

Three screws

(BVTP2.6x8)

Display board

Flat type wire

(CN601)

!™

(BVTP2.6x8)

!£

(BVTP2.6x8)

Four screws

Six screws

– 17 –

3-5. DISC TRAY

(Perform after removing the front panel.) Note:When installing the Disc tray, pull around the flat type wire to

Flat type wire (8 core)

Two claws

Pull-out the disc tray.

Remove the disc tray.

pass through the claw

Claw

and claw B, as shown in the figure.

Claw

3-6. SLIDER (CAM)

Bracket (Guide L)

Two screws (BTP2.6x6)

Leaf spring

Slider (Cam)

Turn the cam the

direction of arrow.

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

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

Bracket (Guide R)

– 18 –

Two screws (BTP2.6x6)

3-7. BASE UNIT (MBU-5A) AND BD (MD) BOARD

Flexible board

(CN104)

Flexible board

(CN101)

Base unit (MBU-5A)

Three screws

(BTP2.6x6)

Screw (M1.7x4)

3-8. SW BOARD AND LOADING MOTOR (M103)

Two screws

(PWH1.7x3)

BD (MD) board

Gear B

Screw (PTPWH M2.6x6)

Loading motor (M103)

Remove the solder (Five portion)

SW board

Two screws (BTP2.6x6)

– 19 –

SECTION 4

SERVICE MODE

MC Cold Reset

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

1. Press three buttons p , ENTER/YES , and 1/u simultaneously.

2. “COLD RESET” is displayed on the fluorescent display tube and reset is executed.

CD Delivery Mode

• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair .

Procedure:

1. Press 1/u button to turn the set ON.

2. Press CD LOOP button and 1/u button simultaneously.

3. A message “LOCK” is displayed on the fluorescent indicator tube, and the CD delivery mode is set.

MC Hot Reset

• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.

Procedure:

1. Press three buttons p , ENTER/YES , and DISC 1 simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset.

Sled Servo Mode

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.

Procedure:

1. Press 1/u button to turn the set ON.

2. Press three buttons p , ENTER/YES , and § (CD) simultaneously.

3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.

4. With the CD in stop status, When the ≠ AMS ± knob is rotated in the clockwise direction, the optical pick-up moves outside.

When rotated counterclockwise, it moves inside.

5. To exit from this mode, perform as follows:

1) Move the optical pick-up to the most inside track.

2) Execute MC cold reset. (Press the three buttons p , ENTER/YES , and 1/u button simultaneously.)

Note:

• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be chipped.

Change-over of AM Tuner Step between 9kHz and 10kHz

• A step of AM channels can be changed over between 9kHz and 10kHz.

Procedure:

1. Press 1/u button to turn the set ON.

2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.

3. Press 1/u button to turn the set OFF.

4. Press ENTER/YES and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to “AM 9k STEP” or “AM

10k STEP”, and thus the channel step is changed over.

LED and Fluorescent Indicator Tube All Lit, Key Check Mode

Procedure:

1. Press three buttons p , ENTER/YES , and DISC 2 simultaneously.

2. LEDs and fluorescent indicator tube are all turned on.

Press DISC 2 button, and the key check mode is activated.

3. In the key check mode, the fluorescent indicator tube displays “K 0 V0 J0”. Each time a button is pressed, “K”value increases. However ,

once a button is pressed, it is no longer taken into account. “J” Value increases like 1, 2, 3 ... if rotating ≠ AMS ± knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction. “V” Value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.

4. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

– 20 –

AMS Test Mode

• This mode is used for checking the AMS operations of the tape deck.

JIG 7-819-039-12 Alignment tape, AMS-110A

Procedure:

1. Press the 1/u button to turn the unit ON.

2. Set the tape (AMS-110A).

3. Press the three buttons p , ENTER/YES , and DISC 3 button simultaneously.

4. “TEST MODE” is displayed on the fluorescent display tube.

5. Press the FUNCTION button and switch the function to the deck with the tape (AMS-110A).

6. Press the CD SYNC button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.

7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8. “NG” is displayed at other times, and the deck stops.

8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed. “NG” is displayed at other times.

Note: The p button of CD section will become effective and the aging of CD section will stop sometime, if the buttons described in step 3

are not pressed simultaneously. In that case, press ^/CD button and operate the CD section.

– 21 –

SECTION 5

TEST MODE (MD)

5-1. 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 §EJECT (MD) 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 §EJECT (MD) button after pressing the MENU/NO button and the rotation of disc is stopped.

5-1-1. 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 REC (MD) button.

5-2. SETTING THE TEST MODE

The following are two methods of entering the test mode. Procedure 1:With the power ON, press the CD-MD SYNC button while pressing the p and ENTER/YES buttons together.

When the test mode is set, “Check” will be displayed. Rotating the AMS dial switches between the following four groups;

···Nn Check Nn Adjust Nn Service Nn Develop Nn ···.

Procedure 2:With the power ON, press the REC (MD) button while pressing the p and ENTER/YES buttons together.

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.

5-3. EXITING THE TEST MODE

Press the REPEAT/STEREO/MONO button.

5-4. BASIC OPERATIONS OF THE TEST MODE

All operations are performed using the AMS dial, ENTER/YES button, and MENU/NO button. The functions of these buttons are as follows.

Function name

AMS dial ENTER/YES button MENU/NO button

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

Function

– 22 –

5-5. SELECTING THE TEST MODE

There are 31 types of test modes as shown below. The groups can be switched by rotating the AMS dial. After selecting the group to be used, press the MD WALKMAN SYNC button. After setting a certain group, rotating the AMS dial 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 ACCESS MODE 0920 CHECK HEAD ADJUST CPLAY2 MODE CREC2 MODE 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 Access check Outermost circumference check Head position check Same functions as CPLAY MODE Same functions as CREC MODE 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) (X) (X) (X) (X)

Group (*)

CS CS CS CS CS C C C

AS AS AS AS AS

D D D

D D 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 3.

• If a different mode has been selected by mistake, press the MENU/NO 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 MENU/NO button to exit 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.

– 23 –

5-5-1. 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 Rotate the AMS dial and display “CPLAY MODE”. 3 Press the ENTER/YES 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 ENTER/YES 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 MENU/NO button. The display will change to “CPLAY MODE”. 2 Press the §EJECT (MD) 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

5-5-2. 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 Rotate the AMS dial and display “CREC MODE”. 3 Press the ENTER/YES button to change the display to “CREC MID”. 4 When access completes, the display changes to “CREC ( )” and “REC” indicator lights up.

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

2. Changing the parts to be recorded 1 When the ENTER/YES button is pressed during continuous recording, the display changes as below.

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

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

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

3. Ending the continuous recording mode

1 Press the MENU/NO button. The display changes to “CREC MODE” and “REC” indicator goes off. 2 Press the §EJECT (MD) 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 MENU/NO 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.

5-5-3. 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 MENU/NO button immediately to exit it.

– 24 –

5-6. FUNCTIONS OF OTHER BUTTONS

Function

^/MD

) *

0 *

CLEAR PLAY MODE DISPLAY

§ EJECT (MD) REPEAT/STEREO/MONO

* This function works only when the p button is pressed and “MD” is displayed. In other cases, it works everytime the p button is pressed.

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

5-7. TEST MODE DISPLAYS

Each time the DISPLAY 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 CLEAR 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.

Auto gain display (Not used in servicing)

Detrack check display (Not used in servicing)

IVR display (Not used in servicing)

Mode display

Error rate display

Address display

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.

MEANINGS OF OTHER DISPLAYS

Display

^/MD *

REC SYNC L-SYNC OVER 1 REPEAT TRACK DISC SHUFFLE MONO

* Differentiate ^/MD by the color of the button indicator.

During continuous playback (CLV: ON) (Green) Tracking servo OFF (Unber) Recording mode ON CLV low speed mode ABCD adjustment completed Tracking offset cancel ON Tracking auto gain OK Focus auto gain OK Pit High reflection CLV S CLV LOCK

When Lit

Contents

STOP (CLV: OFF) (Light off)

Tracking servo ON (Green) Recording mode OFF CLV normal mode

Tracking offset cancel OFF

Groove Low reflection CLV A CLV UNLOCK

When Off

– 25 –

SECTION 6

MECHANICAL ADJUSTMENTS

Precaution

1. Clean the following parts with a denatured alcohol-moistened swab:

record/playback heads pinch rollers erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Mode

FWD FWD

back tension REV

REV back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

100 g or more

(3.53 oz or more)

100 g or more

(3.53 oz or more)

– 26 –

SECTION 7

ELECTRICAL ADJUSTMENTS

MD SECTION

7-1. PARTS REPLACEMENT AND ADJUSTMENT

• Check and adjust the MDM and MBU as follows. The procedure changes according to the part replaced

• Temperature compensation offset check

• Laser power check

• Traverse check

• Focus bias check

• C PLAY check

• Self-recording/playback check

• Abbreviation OP : Optical pick-up OWH: Overwrite head

Parts Replacement and Repair

Has the OWH been replaced?

Has OP, IC171, IC101, or IC121 been replaced?

YES

Initial setting of the adjustment value

Has OP or IC171 been replaced?

Check the sleding and spindle mechanisms. Other causes can be suspected.

YES

IOP information recording (IOP value labeled on OP)

Has IC171 or D101 been replaced?

YES

Temperature compensation offset adjustment

• Laser power adjustment

• Traverse adjustment

• Focus bias adjustment

• Error rate adjustment

• Focus bias check

• Auto gain adjustment

– 27 –

7-2. PRECA UTIONS FOR CHECKING LASER DIODE

EMISSINON

T o check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.

7-3. PRECAUTIONS FOR USE OF OPTICAL PICK-

UP (KMS-260A)

As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.

pick-up

laser tap

flexible board

Optical pick-up flexible board

7-4. PRECAUTIONS FOR ADJUSTMENTS

1) When replacing the following parts, perform the adjustments and checks with ¬ in the order shown in the following table.

D101

BD Board

IC101, IC121

IC192

1. Initial setting of adjustment value

2.Recording of IOP information (Value written in the pick-up)

3.Temperature compensation offset adjustment

Optical

Pick-up

IC171

¬G¬¬

¬G¬GG

¬¬GGG

4) Use the following tools and measuring devices.

• Check Disc (MD) TDYS-1 (Parts No. 4-963-646-01)

• Test Disk (MDW-74/AU-1) (Parts No. 8-892-341-41)

• Laser power meter LPM-8001 (Parts No. J-2501-046-A)

MD Laser power meter 8010S (Parts No. J-2501-145-A)

• Oscilloscope (Measure after performing CAL of prove.)

• Digital voltmeter

• Thermometer

• Jig for checking BD board waveform (Parts No. : J-2501-149-A)

5) When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited.)

6) Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Note on page 9.)

7) As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.

Note:

When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (J-2501145-A) instead of the conventional laser power meter is convenient. It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of the optical pick-up.

7-5. CREATING CONTINUOUSL Y RECORDED DISC

* This disc is used in focus bias adjustment and error rate check.

The following describes how to create a continuous recording disc.

1. Insert a disc (blank disc) commercially available.

2. Rotate the AMS dial and display “CREC MODE”.

3. Press the ENTER/YES button again to display “CREC MID”. Display “CREC (0300)” and start to recording.

4. Complete recording within 5 minutes.

5. Press the MENU/NO button and stop recording .

6. Press the §EJECT (MD) button and remove the disc.

The above has been how to create a continuous recorded data for the focus bias adjustment and error rate check.

Note :

• Be careful not to apply vibration during continuous recording.

4.Laser power adjustment

5.Traverse adjustment

6.Focus bias adjustment

7.Error rate check

8. Auto gain output level adjustment

¬G¬¬¬

¬G¬¬G

2) Set the test mode when performing adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in “group S” of the test mode.

3) Perform the adjustments to be needed in the order shown.

– 28 –

7-6. CHECKS PRIOR TO REPAIRS

Specified value : Below 10% offset value Offset value (%) = X 100

A – B

2 (A + B)

Specified value : Below 10% offset value Offset value (%) = X 100

A – B

2 (A + B)

These checks a re pe rform ed before replacing parts according to “approximate specifications” to determine the faulty locations. For details, refer to “Checks Prior to Parts Replacement and Adjustments” (See page 11).

7-6-1. Temperature Compensation Offset Check

When performing adjustments, set the internal temperature and room temperature to 22 to 28°C.

Note 1: After step 4, each time the ENTER/YES button is pressed,

the display will be switched between “LD 0.7 mW $ ”, “LD 6.2 mW $ ”, and “LD WP $ ”. Nothing needs to be performed here.

7-6-3. T raverse Check

Connection :

Oscilloscope

Checking Procedure:

1. Rotate the AMS dial to display “TEMP CHECK”.

2. Press the ENTER/YES button.

3. “T=@@(##) OK” should be displayed. If “T=@@ (##) NG” is displayed, it means that the results are bad. (@@ indicates the current value set, and ## indicates the value written in the non-volatile memory.)

7-6-2. Laser Power Check

Before checking, check the IOP value of the optical pick-up. (Refer to 7-8. Recording and Displaying IOP Information.)

Connection :

Laser power meter

Optical pick-up objective lens

Digital volt mete

CN110 pin

BD board

(I+3V)

(IOP)

BD board

CN110 pin

3 1

(TE)

(VC)

V : 0.5 V/div H : 10 ms/div Input : DC mod

Checking Procedure:

1. Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin 1 (VC) of the BD board.

2. Load a disc (any available on the market). (Refer to Note 1.)

3. Press the p button and display the “MD”, and then press the ) button and move the optical pick-up outside the pit.

4. Rotate the AMS dial and display “EF MO CHECK”(C03).

5. Press the ENTER/YES button and display “EFB =

MO-R”. (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)

6. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS dial. (Read power traverse checking)

(Traverse Waveform)

Checking Procedure:

1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the p button and display the “MD”, and then press the 0 button or ) button to move the optical pick-up.) Connect the digital volt meter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP).

2. Then, rotate the AMS dial and display “LDPWR CHECK” (C02).

3. Press the ENTER/YES button once and display “LD 0.9 mW $

”. Check that the reading of the laser power meter become

0.84 to 0.92 mW.

4. Press the ENTER/YES button once more and display “LD 7.0 mW $ ”. Check that the reading the laser power meter and digital volt meter satisfy the specified value.

Specified Value :

Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Optical pick-up displayed value ± 10%

(Optical pick-up label)

KMS

260A 27X40 B0825

Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 (Ω)

5. Press the MENU/NO button and display “LDPWR CHECK” and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.)

(For details of the method for checking this value, refer to “7-8. Recording and Displaying IOP Information”.)

7. Press the ENTER/YES button and display “EFB =

8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS dial. (Write power traverse checking)

(Traverse Waveform)

9. Press the ENTER/YES button display “EFB = Then, the optical pick-up moves to the pit area automatically and servo is imposed.

– 29 –

MO-W”.

MO-P”.

10.Observe the waveform of the oscilloscope, and check that the

specified value is satisfied. Do not rotate the AMS dial.

(Traverse Waveform)

Specified value : Below 10% offset value

A – B

Offset value (%) = X 100

2 (A + B)

11. Press the ENTER/YES button display “EF MO CHECK” The disc stops rotating automatically.

12. Press the §EJECT (MD) button and remove the disc.

13. Load the check disc (MD) TDYS-1.

14. Roteto the AMS dial and display “EF CD CHECK”.

15. Press the ENTER/YES button and display “EFB = CD”. Servo is imposed automatically.

16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS dial.

(Traverse Waveform)

7-6-4. Focus Bias Check

Change the focus bias and check the focus tolerance amount.

Checking Procedure :

1. Load a test disk (MDW-74/AU-1).

2. Rotate the AMS dial and display “CPLAY MODE”.

3. Press the ENTER/YES button twice and display “CPLAY MID”.

4. Press the MENU/NO button when “C1 = AD = ” is displayed.

5. Rotate the AMS dial and display “FBIAS CHECK”.

6. Press the ENTER/YES button and display “ / c = ”. The first four digits indicate the C1 error rate, the two digits after “/” indicate ADER, and the 2 digits after “c =” indicate the focus bias value. Check that the C1 error is below 220 and ADER is below 2.

7. Press the ENTER/YES button and display “ / b = ”. Check that the C1 error is below 220 and ADER is below 2.

8. Press the ENTER/YES button and display “ / a = ”. Check that the C1 error is below 220 and ADER is below 2.

9. Press the MENU/NO button, next press the §EJECT (MD) button, and remove the test disc.

7-6-5. C PLAY Checking

MO Error Rate Check

Checking Procedure :

1. Load a test disk (MDW-74/AU-1).

2. Rotate the AMS dial and display “CPLAY MODE”.

3. Press the ENTER/YES button and display “CPLAY MID”.

4. The display changes to “C1 =

AD = ”.

5. If the C1 error rate is below 80, check that ADER is below 2.

6. Press the MENU/NO button, stop playback, press the §EJECT (MD) button, and test disc.

Specified value : Below 10% offset value

A – B

Offset value (%) = X 100

2 (A + B)

17. Press the ENTER/YES button and display “EF CD CHECK”.

18. Press the §EJECT (MD) button and remove the check disc (MD) TDYS-1.

Note 1 : MO reading data will be erased during if a recorded disc is

used in this adjustment.

Note 2 : If the traverse waveform is not clear, connect the oscillo-

scope as shown in the following figure so that it can be seen more clearly.

Oscilloscop

330 k

CN110 pin

BD board

(TE)

(VC)

Ω

10pF

CD Error Rate Check

Checking Procedure :

1. Load a check disc (MD) TDYS-1.

2. Rotate the AMS dial and display “CPLAY MODE”.

3. Press the ENTER/YES button twice and display “CPLAY MID”.

4. The display changes to “C = AD = ”.

5. Check that the C1 error rate is below 50.

6. Press the MENU/NO button, stop playback, press the §EJECT (MD) button, and the test disc.

7-6-6. Self-Recording/playback Check

Prepare a continuous recording disc using the unit to be repaired and check the error rate.

Checking Procedure :

1. Insert a recordable disc (blank disc) into the unit.

2. Rotate the AMS dial to display “CREC MODE”.

3. Press the ENTER/YES button to display the “CREC MID”.

4. When recording starts, “REC” is displayed, this becomes “CREC (@@@@)" (@@@@) is the address), and recording starts.

5. About 1 minute later, press the MENU/NO button to stop continuous recording.

6. Rotate the AMS dial to display “C PLAY MODE”.

7. Press the ENTER/YES button to display “C PLAY MID”.

8. “C1 = AD = ” will be displayed.

9. Check that the C1 error becomes below 80 and the AD error below 2.

10. Press the MENU/NO button to stop playback, and press the

§EJECT (MD) button and remove the disc.

– 30 –

+ 82 hidden pages