Sony HCD MJ1 Service Manual

HCD-MJ1

SERVICE MANUAL

Ver 1.2 2003.12

r HCD-MJ1 is the tuner, CD

amplifier and MDsection in MJ-L1.

US and foreign patents licensed from Dolby Laboratories Licensing Corporation.

CD ptayer section

System Compact disc and digital audio system Laser Semiconductor laser (λ=780 nm)

Emission duration: continuous

Laser output

Max 44.6 µW*

* This output is the value measured at a

distance of 200mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture.

Wavelength

780 - 790 nm

Frequency response

2 Hz - 20 kHz

MiniDisc deck section

System MiniDisc digital audio system Disc MiniDisc Laser Semiconductor laser (λ= 780 nm) Laser output

Max 44.6 µW*

* This output is the value measured at a

distance of 200mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture.

SPECIFICATIONS

Laser diode properties

Materi.II: GaAIAs

Revolutions (CLV)

Approx. 400 rpm to 900 rpm

Error correction

Adv,Inced Cross IntL•rleave Rced Solomon Code (ACIRC)

Sampling frequency

44.1 kHZ

Modulation system

EFM (Eight-to-Fourteen Modula tion)

Number of channels

2 stereo channels

Frequency response

5 Hz - 20 kHz

Wow and fluttei

Below measurable limit

Tuner section

FM tuner section

Tuning range US, Canadian model

: 87.5 - 108.0 MHz (100 kHz step)

Except US, Canadian model

: 87.5 - 108.0 MHz (50 kHz step)

Section

MD Model Name Using Similaar Mechanism NEW Section Mini Disc Mechanism Type MDM-2ER

US Model

Canadian Model

AEP Model

UK Model

E Model

Model Name Using Similar Machanism HCD-D1/T1

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––

CD Mechanism Type CDM13C-5BD19

Base Unit Name BU-5BD19

Aerial FM Iead aerial Aerial terminal

Intermediate frequency

AM tuner section

Tuning range US, Canadian model

AEP, UK, German, Italian, Singapore, Hong kong model

Aerial AM Ioop aerial,

Intermediate frequency

Timer section

System Quartz lock system Timer setting

Sleep timer

75 ohm unbalanced

l0.7 MHz

: 530 - 1.710 kHz (with the interval set at 10 kHz)

: 531 - 1.602 kHz (with the interval set at 9 kHz)

External aerial terminals

450 kHz

One-minute step

10-minute step. max. 90 minutes

– Continued on pag 2 –

9-960-606-13

FLAT COMPONENT SYSTEM

Sony Corporation

Home Audio Company Published by Sony Engineering Corporation

Amplifier section

DIN power output

Continuous RMS power output US, Canadian model :

Except US, Canadian model :

Music power output

Inputs TAPE (phono jacks):

Outputs TAPE (phono jacks):

Supplied accessories

General

Power requirements

Destination Power Power

US, Canadian model 120V AC,60Hz 95W

AEP, UK, German Italian model

E, Singapore, Hong Kong model

Dimensions

Mass Approx. 7.0 kg (15 Ib 7 oz)

Design and specifications are subject to change without notice.

30 W + 30 W (6 ohms at 1 kHz, DIN)

30 W + 30 W (6 ohms at 40Hz-16kHz, 1.0% THD) 35 W + 35 W (6 ohms at 1kHz, 5% THD) POPO 350W

40 W + 40 W (6 ohms at 1 kHz, lO% THD)

70W+70W (6 ohms at 1 kHz. lO% THD)

voltage 250 mV impedance 47 kilohms

voltage 250 mV impedance 1 kilohms PHONES (stereo phone jack): accepts headphones of 8 ohms or more.

Sony RM-SMJI Remote (1) Sony lithium battery. CR2025 (1 ) FM lead aerial (1) AM loop aerial (1) Speaker cords (2)

requirements consumption

220-230V AC, 50/60Hz 110-120V/ 220-240V AC,

50/60Hz Adjustable with 95W the Voltage Selector

Approx. 430 x 95 x 290 mm (17 x 33/4 x 11 1/2 inches) (w/h/d) incl. projecting parts and controls

95W

TABLE OF CONTENTS

Specifications ............................................................................... 1

SERVICING NOTES ..................................................4

2. GENERAL

Index to parts and Controls .................................................... 5

DISASSEMBLY

3-1. Case (Top) Section and

Plate (T back) Ornamentel Removal............................... 8

3-2. Main board,Tuner board and Display board Removal .... 8

3-3. CD Mechanism, MD Mechanism and

Digital board Removal .................................................... 9

DISC TABLE GETTING OUT PROCEDURE

ON THE POWER SUPPLY IS OFF ....................... 10

TEST MODE ............................................................. 11

6. ELECTRICAL ADJUSTMENTS ..................................... 14

EXPLANATION OF IC TERMINALS ...................... 22

8. DIAGRAMS

8-1. Block Diagram –Main Section– ................................. 30

8-2. Block Diagram –MD Section– ................................... 33

8-3. Circuit Boards Location.............................................. 37

8-4. Printed Wiring Boards –Main Section–...................... 38

8-5. Schematic Diagram –Main Section– .......................... 41

8-6. Schematic Diagram –Digital Section– ....................... 46

8-7. Printed Wiring Boards –Digital Section– ................... 51

8-8. Printed Wiring Boards –BD : MD Section– ............... 54

8-9. Schematic Diagram –BD : MD Section– ................... 57

8-10. Schematic Diagram –Display Section– ...................... 61

8-11. Printed Wiring Boards –Display Section–.................. 65

8-12. Schematic Diagram –BD : CD Section– .................... 70

8-13. Printed Wiring Boards –BD : CD Section– ................ 73

8-14. IC Block Diagram....................................................... 75

9. EXPLODED VIEWS

9-1. Cabinet Section............................................................. 79

9-2. Chassis Section-1.......................................................... 80

9-3. Chassis Section-2.......................................................... 81

9-4. MD Mechanism Section (MDM-2ER) ......................... 82

9-5. Base Unit Section (MD) (MBU-2) ............................... 83

9-6. CD Mechanism Section-1 (CMD-5BD19) ................... 84

9-7. CD Mechanism Section-1 (CMD-5BD19) ................... 85

10. ELECTRICAL PARTS LIST ............................................ 86

– 2 –

MODEL IDENTIFICATION

MODEL NO. HCD-MJ1

FLAT COMPONENT SYSTEM

US, Canadian model : AC120V ⁄60Hz AEP, UK, German, Italian model

: AC220-230V ⁄50/60Hz

Hong kong, Sinagpore mdel

: AC110-120V/AC220-240V ⁄50/60Hz

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

For customers in Europe

This Compact Disc player is classified as a CLASS 1 LASER product. The CLASSLASER PRODUCT label is located on the rear exterior.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check 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 TEST

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 0.5mA (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

0.75V, 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

0.15

1.5k

Ω

Voltmeter (0.75V)

This caution label is located insuide the unit.

CAUTION

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

Earth Ground

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

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED 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 PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 3 –

SECTION 1

SERVICING NOTES

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

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown 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 pick-up block. Therefore, when checking the laser diode emission, observe more than 30 cm away from the objective lens.

ENTERING TEST MODE

When you press the DISP button, p button, and EDIT button at the same tilne, the system goes into key , fluorescent tube, jogr and LED check mode.

r Fluorescent tube check

All the lights light up. Then, each time you press the ENTER but-

ton, the display mode changes as shown below.

nAll lit n partially lit l n partially lit 2

r LED check

When you turn the jog dial, the LEDS change froln all lit to indi-

vidually lit.

r Key check

The EDIT/NO button puts the system into key/jog check mode . When you press a button, the number is counted up. However, pressing a button again that you already pressed does

not count up the number.

Turning the jog dial to the right increases the jog count display,

turning the jog dial to the left decreases the jog count.

When you have pressed all the buttons and “KEY= 0K” is dis-

played, pressing any button ends test Inode.

Cautions when replacing IC121 and IC171 on the BD board

A change has been made from CXD2535BR due to a modification of IC121 on the BD board in this unit. Accompanying this modification, a portion of the nonü]volatile memory of IC171 (XC24CO1S) has been changed. Conversely, when IC121 has been replaced, use CXD2535BR and rewrite the contents of IC171.

Contents of non-volatile memories CXD2535BR

Address CXD2535BR

15 93 2D 1A 2E 1A

Rewrite Procedure for Non-volatile Memory

(1) With the power switched off and the power plug plugged into a

socket. press the BASS/TREBLE button. CLOCK button, and MD button more than one at a time in order.

(2)Rotate the JOG dial knob and display the “EEP MODE”.

When you press the YES key, the display changes to show “EEP**@@”.

(Here, **indicates the address, and @@ indicates the data.) (3)Rotate the JOG dial knob and display the “EEP 15 @@”. (4)When you press the CD SYNCHRO button, “EEP 15 @@>@@”

is displayed so then turn the JOG dial knob to show ügEEP 15

@@>93” (5)Press the YES key and “COMPLETE” will appear for a moment

and data shown as “EEP 15 93” is being rewritten. (6)Rewrite address 2D and address 2E, into 1A using steps (3) to (5)

above. (7) When all changes are complete, press the NO key and display

“EEP MODE”. (8)Press the REPEAT button. If no disc is loaded, the time is dis-

played, so unplug the power plug. If a disc is loaded, the disc is

ejected, then the time is displayed. Unplug the power plug from

the socket to end EEP rewrite mode. (See “How to end test mode”

below .) Note: Changes in the contents of non-volatile memory are not re-

flected until the power is switched off, then on.

HOW TO END TEST MODE

Method :

l Press the REPEAT button. 2 If no disc is loaded, the time is displayed. If a disc is loaded, the

disc is ejected, then the time is displayed . 3 Unplug the power plug from the socket.

– 4 –

SECTION 2

GENERAL

This section is extracted from instruction manual.

– 5 –

– 6 –

– 7 –

SECTION 3

DISASSEMBLY

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

3-1. CASE (TOP) SECTION AND PLATE (T BACK) ORNAMENTEL REMOVAL

+BVTT 3 x 6

CASE (TOP) SECTION

MAIN BOARD

+BVTT 3 x 10

+BVTP 3 x 10

+BVTT 3 x 10

+BVTP 3 x 10

+BVTT 3 x 10

+BVTP 3 x 10

3-2. MAIN BOARD,TUNER BOARD AND DISPLAY BOARD REMOVAL

Wire (flat type) (13CORE) (CN103)

to TERMINAL BOARD (CN602)

Wire (flat type) (19CORE) (CN105)

to CDM

!§

+BVTP 3 x 8

!¶

Wire (flat type) (15CORE) (CN4)

to MAIN BOARD (CN104)

TUNER BOARD

CN106 (8pin)

to DIGITAL BOARD (CN281)

+BVTP 3 x 8

!•

!¢

+BVTP 3 x 8

PLATE (T BACK) ORNAMENTAL

Wire (flat type) (11CORE)

to Switch (R) BOARD

CN102 (8pin)

to AMP BOARD (CN901)

+BVTP 3 x 8

CN101 (9pin)

to TRANSFORMER BOARD (CN804)

MAIN BOARD

CN111 (3pin) toFAN801

Wire (flat type) (21CORE) (CN109)

to DIGITAL BOARD (CN223)

!™

CN702 (5pin) to CDM

!£

CN706 (3pin)

to SENSOR BOARD (CN706)

!¢

+BVTP 3 x 8

!¡

CN701(4pin) SWTCH (LID) BOARD (CN703) and MOTOR (LID) BOARD (CN704)

– 8 –

!∞

DISPLAY BOARD

!º

Wire (flat type) (19CORE) (CN110)

to SWITCH (R) BOARD (CN501)

Wire (flat type) (19CORE) (CN107)

to DISPLAY BOARD (CN551)

3-3. CD MECHANISM, MD MECHANISM AND DIGITAL BOARD REMOVAL

+BVTP 3 x 8

+BVTT 3 x 6

CHASSIS (M)

!£

+BVTT3 x 10

CD MECHANISM SECTION

!¢

+BVTT3 x 10

!¡

+BVTP 3 x 8

+BVTT3 x 10

MD MECHANISM SECTION

+BVTT3 x 6

+BVTT 3 x 10

!º

SHELDE (T)

+BVTP 3 x 8

DIGITAL BOARD

+BVTP 3 x 8

SHELDE

CASE (BOTTOM) SECTION

!™

– 9 –

SECTION 4

DISC TABLE GETTING OUT PROCEDURE ON THE POWER SUPPLY IS OFF

TWEEZERS

DOOR

CAM

DISC TABLE

– 10 –

SECTION 5

TEST MODE

5-1. How to enter the Test Mode

With the power switched of f and the po wer plug plugged into a socket, pr ess the B ASS/TREBLE b utton, CLOCK b utton, and MD b utton more than one at a time in order.

5-2. How to Release the Test Mode

Press the REPEAT button.

5-3. Basic Operations of the Test Mode

All operations are performed using the JOG dial (Rotary Encoder) , YES (ENTR/TES)button, and NO (EDIT/ON)button. The functions of these keys are as follows.

Function Contents

JOG dial Changes parameters and modes. YES button Proceeds onto the next setp. inalizes input NO button Returns to previous step. Stops operations.

5-4. Selecting the Test Mode

Eight test modes are selected by turning the AMS knob.

Display Contents

TEMP ADJUST Temperature compnsation offset adjustment LDPWR ADJUST Laser power adjustment EFBAL ADJUST Trav erse adjustment FBIAS ADJUST Focus bias adjustment FBIAS CHECK Focus bias check CPLAY MODE Continuous playback mode CREC MODE Continuous recording mode EEP MODE Non-volatile memory mode*

For detailed description of each adjustment mode, refer to 6. Electrical Adjustments. If a different adjustment mode has been selected by mistake, press the NO button to exit from it. * The EEP MODE is not used in servicing. If set accidentally, press the NO button immediately to exit it.

5-5-1. Operating the Continuous Playback Mode

1. Entering the continuous playback mode

1 Set the disc in the unit (either MO or CD). 2 Rotate the JOG dial and display “CPLAY MODE”. 3 Press the YES button to change the display “CPLAY IN”. 4 When access completes, the display changes to “C1 = AD = ”

Note : The “ ” displayed are arbitrary numbers.

2. Changing the parts to be played back 1 Press the YES button during continuous playback to change the display to “CPLAY MID”, “CPLAY OUT”. When pressed another time, the parts to be playedback can be changed. 2 When access completes, the display changes to “C1 = AD = ”

Note : The “ ” displayed are arbitrary numbers.

3. Ending the continuous playback mode

1 Press the No button. The display will change to “CPLAY MODE”. 2 Press the MD § button and remove the disc.

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

Press the DISPIAY button twice to display thae address. Pressing the DISPIAY buttan again returns the display to “C1 = AD = ”

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

– 11 –

5-5-2. Operating the Continuous Recording Mode

1. Entering the continuous recording mode

1 Set the MO disc in the unit. 2 Rotate the JOG dial knob and display “CREC MODE”. 3 Press the YES button to change the display to “CREC IN”.

4 When access completes, the display changes to “CREC ( ) and REC lights up.

Note : The “ ” displayed are arbitrary numbers.

2. Changing the parts to be recorded 1 When the YES button is pressed during continuous recording. the display changes to “CREC MID”, “CREC OUT”and REC goes off. When pressed another time, the parts to be recorded can be changed. 2 When access completes, the display changes to “CREC ( ) and REC lights up.

Note : The “ ” displayed are arbitrary numbers.

3. Ending the continuous recording mode

1 Press the No bottan. The display change to CREC MODE” and REC goes off. 2 Press the MD § button and 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 No buttton can be used to stop recording anytime. Note 3 : During the test mode, the erasing-protection tab will not be detected. Therefore be careful not to set the continuous recording mode

when a disc not be erased is set in the unit.

Note 4 : Do not perform continuous recording for long periods of time above 5minutes. Note 5 : 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 nonü]volatile memory. It is not used in servicing. If set accidentally, press the No button immediately to exit it.

5-6. Functions of Other buttons

Function Contents

^ p Stops continuouse playback and continuouse recording.

) The sled moves to the outer circumference only when this is pressed. 0 The sled moves to the inner circumference only when this is pressed. r Turns recording ON/OFF when presed during continuoos playback.

SCROOLL Switches butween the pit and groove modes when pressed. DISPLAY Switches the display whin pressed. Returns to previous step. Stops operations.

Sets continuous playback when pressed in the STOP state. When pressed during continuouse playback,the tracking servo turns ON/OFF.

Note : The erasing-protection tab is not detected during the test mode. Recording will start regardless of the position of the erasing-protection

tab when the r (REC) button is pressed.

– 12 –

5-7. Test Mode Displays

Each time the DISPLAY button is pressed, the display changes in the following order. MODE displaynError rate displaynAddress display

1. MODE display Displays “TEMP ADJUST” , “CPLAY MODE” , etc.

2. Address display Addresses are displayed as follows. h = s = (MO pit and CD) h = a = (MO groove) h = Header address s = SUBQ address a = ADIP address * A ‘ ’ display appears when the address cannot be loaded.

3. Error rate display Error rates are displayed as follows. C1 = AD = C1 = Indicates C1 error AD = Indicates ADER

5-8. Meanings of Other Displays

Display Contents

Light Off Blinkig

( During continuous playbak STOP ^ Tracking servo OFF Tracking servo ON

REC Recording mode ON Recording mode OFF SYNC CLV LOCK CLV UNLOCK TRACK Pit Groove DISC High refiection Low refiection LEVEL-SYNC CLV-S CLV-A MEMORY ABCD adjustment completed SHUFFLE Focus auto gain successful Focus auto gain successful

Tracking auto gain successful Tracking auto gain failed

5-9. Precautions for Use of Test Mode

2 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 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.

* Always press the NO button before pressing the MD § button.

2 The erasing-protection tab is not detected in the test mode. Therefore, when modes which output the recording laser power such as

continuous recording mode and traverse adjustment mode, etc. are set, the recorded contents will be erased regardless of the position of the tab. When using a disc that is not to be er ased in the test mode, be careful not enter the continuous recording mode and tra verse adjustment mode.

– 13 –

SECTION 6

ELECTRICAL ADJUSTMENTS

PRECAUTION

6-1. Precautions for Checking Laser Diode Emission

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

6-2. Precautions for Use of optical pickup (KMS-210A)

As the laser diode in the optical pickup 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 tale adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.

Laser tap

Optical pickup flexible board

6-3. Precautions for Adjustments

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

Optical BD (MD) BOARD

pickup IC171 D101 IC101,IC121,IC191

1. Temperature compensation X O O O offset adjustment

2. Laser power adjustment

3. Traverse adjustment

4. Focus bias adjustment

5. Error rate check O O X O

OXX O

OOX O

2) Set the test mode when performing adjustments.

After completing the adjustments,exit the test mode.

3) Perform the adjustments in the order shown.

4) Use the following tools and measuring devices.

r Test disc (CD) TDYS-1 (Parts No. 4-963-646-01) r Laser power meter LPM-8001 (Parts No. J-2501-046-A) r Oscilloscope r Digital voltmeter r Thermometer

5) When observing several signals on the oscilloscope, etc., make

sure that VC and GND do not connect inside the oscilloscope. (VC and GND will become short-circuited)

6) Do not move RV105 of the BD (MD) board. When replacing it,

adjust to the mechanical center of the semi-fixed resistor.

6-4. Creating MO Continuously Recorded Disc

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

The following describes how to create a MO continuous recording disc.

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

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

3. Press the YES button and display “ CREC IN”.

4. Press the YES button again to display “ CREC MID”.

“ CREC (0300)” is displayed for a moment and recording starts.

5. Complete recording within 5 minutes.

6. Press the NO button and stop recording

7. Press the MD § button and remove the MO disc.

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

Note :

r Be careful not to apply vibration during continuous recording.

– 14 –

6-5. Temperature Compensation Offset Adjustment

Save the temperature data at that time in the non-volatile memory as 25°C reference data.

Note :

1. Usually, do not perform this adjustment.

2. Perform this adjustment in an ambient temperature of 22°C to 28°C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature

3. When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature.

Adjusting Method :

1. Rotate the JOG dial and display “TEMP ADJUST”.

2. Press the YES button and select the “TEMP ADJUST” mode.

3. “TEMP =

”and the current temperature data will be displayed

4. To save the data, press the YES button. When not saving the data, press the NO button.

5. When the YES button is pressed, “TEMP = SAVE”will be displayed for some time, followed by “TEMP ADJUST”. When the NO button is pressed, “TEMP ADJUST” will be displayed.

Specifications :

The temperature should be within “TEMP = EO” to “TEMP = IF”.

4-6. Laser Power Adjustment

Connection :

laser power mete

Optical pickup objective lens

digital voltmete

BD (MD) board TP (I+5V) TP (IOP)

–

Adjusting Method :

1. Set the laser power meter on the objective lens of the optical pickup. (When it cannot be set properly, press the 0 button or ) but- ton and move the optical pickup.) Connect the digital volt meter to TP (IOP) and TP (I+5V).

2. Rotate the JOG dial and display “LDPWR ADJUST”. (Laser power : For adjustment)

3. Press the YES button twice and display “LD $ 4B = 3.5mW”.

4. Adjust RV102 of the BD (MD) board so that the reading of the laser power meter becomes 3.4

+0.1

- 0

mW.

5. Press the YES button and display “LD $ 96 = 7.0mW”. (Laser power : MO writing)

6. Check that the laser power meter and digital voltmeter readings satisfy the specified value.

Specification :

Laser power meter reading : 7.0 ± 0.3 mW Digital voltmeter reading : Optical pickup displayed value

± 10%

(Optical pickup label)

KMS210A

27X40 B0825

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

7. Press the YES button and display “LD $ 0F = 0.7mW”. (Laser power : MO reading)

8. Check that the laser power meter at this time satisfies the specified value.

Specification :

Laser power meter reading : 0.70 ± 0.1mW

9. Press the NO button and display “LDPWR ADJUST”, and stop laser emission. (The NO button is effective at all times to stop the laser emission.)

– 15 –

6-7. T raverse Adjustment

Connection :

oscilloscope

BD (MD) board TP (TEO) TP (VC)

+ –

Adjusting Method :

1. Connect an oscilloscope to TP (TEO) and TP (VC) of the BD (MD) board.

2. Load a MO disc (any available on the market).

3. Press the 0 button or ) button and move the optical pickup outside the pit.

4. Rotate the JOG dial and display “EFBAL ADJUST”.

5. Press the YES button and display “EFBAL MO-W”. (Laser power WRITE po wer/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)

6. Adjust R V101 of the BD (MD) board so that the wa v eform of the oscilloscope becomes the specified value. (MO groove write power traverse adjustment)

(Traverse Wavefom)

Specification : A = B

7. Press the YES button and display “EFB = $ MO-R”. (Laser power : MO reading)

8. Rotate the JOG dial so that waveforms of the oscilloscope becomes the specified value. (When the JOG dial is rotated, the

of “EFB = ” changes and the waveform changes.) in this adjustment, waveform varies at intervals of approx. 3%. Adjust the waveform so that the specified value is satisfied as much as possible. (MO groove read power traverse adjustment)

(Traverse Wavefom)

11.Rotate the JOG dial until the waveforms of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 3%. Adjust the waveform so that the specified value is satisfied as much as possible.

(Traverse Wavefom)

Specification : A = B

12.Press the YES button, display “EFB = SAVE ” for a moment and save the adjustment results in the non-volatile memory. Next “EFBAL CD” is displayed. The disc stops rotating automatically.

13.Press the MD § button and remove the MO disc.

14.Load the test disc TDYS-1.

15.Press the YES button and display “EFB =

CD ” . Servo is im-

posed automatically.

16.Rotate the JOG dial so that the waveforms of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 3%. Adjust the waveform so that the specified value is satisfied as much as possible.

(Traverse Wavefom)

Specification : A = B

17.Press the YES button, display “EFB = $ SAVE” for a moment and save the adjustment results in the non-volatile memory. Next “EFBAL ADJUST” is displayed.

18.Press the MD § button and remove the test disc TDYS-1.

Specification : A = B

9. Press the YES button, display “EFB = $ SAVE” for a moment and save the adjustment results in the non-volatile memory. Next “EFBAL MO-P” is displayed.

10.Press the YES button and display “EFB = $

MO-P”. The optical pickup moves to the pit area automatically and servo is imposed.

Note 1) Data will be erased during MO reading 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.

oscilloscope

Ω

TP (TEO) TP (VC)

330k

10pF

– 16 –

+ –

6-8. Focus Bias Adjustment

Adjusting Method :

1. Load a continuously recorded disc (Refer to “6-4. Creating MO Continuously Recorded Disc”.)

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

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

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

5. Rotate the JOG dial and display “FBIAS ADJUST”.

6. Press the YES button and display “ / a = ”. The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [a =] indicate the focus bias value.

7. Rotate the JOG dial in the clockwise direction and find the focus bias value at which the C1 error rate becomes 220.

8. Press the YES button and display “ / b = ”.

9. Rotate the JOG dial in the counterclockwise direction and find the focus bias value at which the C1 error rate becomes 220.

10.Press the YES button and display “ / c = ”.

11.Check that the C1 error rate is below 50 and ADER is 00. Then press the YES button.

12.If the “( )” in “ - - ( )” is above 20, press the YES button. If below 20, press the NO button and repeat the adjustment from step 2 again.

13.Press the NO button and press the MD § button to remove the continuously recorded disc.

Note 1 : The relation between the C1 error and focus bias is as shown

in the following figure. Find points a and b in the following figure using the above adjustment. The f ocal point position c is automatically calculated from points a and b.

Note 2 : As the C1 error rate changes, perform the adjustment using

the average vale.

C1 error

220

Focus bias value (F, BIAS)

bc b

6-9. Error Rate Check 6-9-1. CD Error Rate Check

Checking Method :

1. Load a test disc TDYS-1.

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

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

4. “C1 =

AD = - -” is displayed.

5. Check that the C1 error is below 20.

6. Press the NO button, stop playback, press the MD § button, and remove the test disc.

6-9-2. MO Error Rate Check

Checking Method :

1. Load a continuously recorded disc (Refer to “6-4. Creating MO Continuously Recorded Disc”.)

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

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

4. “C1 = AD = ”is displayed

5. If the C1 error rate is below 50, check that ADER is 00.

6. Press the NO button, stop playback, press the MD § button, and remove the continuously recorded disc.

6-10. Focus Bias Check

Change the focus bias and check the focus tolerance amount.

Checking Method :

1. Load a continuously recorded disc (Refer to “6-4. Creating MO Continuously Recorded Disc”.)

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

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

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

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

6. Press the 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 50 and ADER is 00.

7. Press the YES button and display “ / b = ”. Check that the C1 error is not below 220 and ADER is not above 00 every time.

8. Press the YES button and display “ / a = ”. Check that the C1 error is not below 220 and ADER is not above 00 every time.

9. Press the NO button, next press the MD § button, and remove the continuously recorded disc.

Note 1 : If the C1 error and ADER are abov e 00 at points a or b, the

focus bias adjustment may not have been carried out properly. Adjust perform the beginning again.

– 17 –

6-11. Adjusting Points and Connecting Points [BD (MD) BOARD] (Component side)

D101

[BD (MD) BOARD] (Conductor side)

(IOP)

(I+5V)

RV101

(VC)

RV102

IC191

IC101

(TEO)

IC121

– 18 –

)

TUNER SECTION

As a front-end (TB1) is difficult to repair if faulty, replace it with new one. But AEP, UK, German, and Italian model are please note, however, that the following adjustments are possible:

AM Section Adjustment AM Tuned Indication Lighting Level Adjustment

Band : AM Setting :

loop antenna

AM RF SSG

carrier frequency : 999kHz Modulation : 400Hz 30%

60 cm

set

Procedure :

1. Set AM RF SSG output level to 81dBµ so that the input level becomes 55dBµ.

2. Tune the set to 999kHz .

3. Adjust RV(AM TUNED LEVEL ADJUSTMENT) so that the TUNED light up.

Adjustment Location : TB1 (TUNER board)

loop antenna of accessories

AM ANTENNA terminal (TM1)

FM Stereo Separation Adjustment

Setting :

FM RF SSG

FM ANTENNA terminal (TM1)

set

Carrier frequency : 98MHz Output level : 1mV (60dB) Modulation

Main (1kHz) : 33.75kHz dev. (45%) Sub (1kHz) : 33.75kHz dev. (45%) Pilot (19kHz) : 7.5kHz dev. (10%)

Procedure :

Turn the set to 98MHz.

FM stereo VTVM VTVM

signal generator connection reading (dB)

output channel

L-CH L-CH A

R-CH L-CH

Adjust RV (FM STEREO SEPARATION ADJUSTMENT) for minimum reading.

R-CH R-CH C

L-CH R-CH

Adjust RV (FM STEREO SEPARATION ADJUSTMENT) for minimum reading.

level mete

47k

Ω

J601 (LINE OUT)

+ –

FM Section Adjustment FM Tuned Indication Lighting Level Adjustment

Band : FW Setting :

FM RF SSG

carrier frequency : 98MHz Modulation : 1kHz,75kHz deviation

FM ANTENNA terminal (TM1)

set

Procedure :

1. Supply a 17.8 µV (25dBµ) 98MHz signal to the ANTENNA ter-

minal.

2. Tune the set to 98MHz.

3. Adjust RV(FM TUNED LEVEL ADJUSTMENT) so that the

TUNED light up.

Adjustment Location : TB1 (TUNER board)

L-CH Stereo separation : A - B R-CH Stereo separation : C - D

The separations of both channels should be equal.

Adjustment Location : TB1 (TUNER board)

[TB1 TUNER BOARD] (Conductor side )

RV (FM TUNED LEVEL ADJUSTMENT

RV (AM TUNED LEVEL ADJUSTMENT)

RV (FM STEREO SEPARATION ADJUSTMENT)

– 19 –

CD SECTION

NOTE :

1. CD Block basically constructed to operate without adjustment. Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use the oscilloscope with more than 10MΩ impedance.

4. Clean an object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

Focus Bias Adjustment

This adjustment is to be done when the optical block is replaced.

Adjustment procedure :

oscilloscope (DC range)

BD (CD) board

TP (RF) TP (VC)

1. Connect oscilloscope to test point TP (VC) and TP (RF) on BD (CD) board.

2. Connect TP ADJ (IC301 @• pin) to ground with lead wire on Main board.

3. Turned power switch ON. (Stop mode)

4. Put disc (YEDS-18) in and press the ^ button.

5. Press the ^ button (Tracking servo ON).

6. Adjust RV101 so that the oscilloscope waveform is as shown in the figure below (eye pattern). A good eye pattern means that the diamond shape ( ) in the center of the waveform can be clearly distinguished.

7. After adjustment,remove the lead wire connected in step 2.

r RF signal reference waveform (eye pattern)

+ –

VOLT/DIV : 0.2V TIME/DIV : 500n

1.3 ± 0.3Vp-p

2. Connect between test point TP (FOK) and GND by lead wire.

3. Turned Power switch on.

4. Put disc (YEDS-18) in and turned Power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.)

5. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within

2.4 ± 0.7Vp-p.

S-curve waveform

symmetry

within 2.4

0.7Vp-p

6. After check, remove the lead wire connected in step 2.

Note : r Try to measure several times to make sure that the ratio

of A : B or B : A is more than 10 : 7.

r T ake sweep time as long as possible and light up the bright

ness to obtain best waveform.

Adjustment Location : BD (CD) board. (see page 13)

RF Level Check

oscilloscope

BD (CD) board

TP (RF)

TP (VC)

Procedure :

1. Connect oscilloscope to test point TP (VC) and TP (RF) on BD (CD) board.

2. Turned Power switch on.

3. Put disc (YEDS-18) in and press the ^ button.

4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

Note :

Clear RF signal waveform means that the shape “◊” can be clearly distinguished at the center of the waveform.

–

When observing the eye pattern, set the oscilloscope for A C range and raise vertical sensitivity.

Adjustment Location : BD (CD) board. (see page 13)

S-Curve Check

oscilloscope

BD (CD) board

TP (FEO)

TP (VC)

+ –

Procedure :

1. Connect oscilloscope to test point TP (VC) and TP (FEO) on BD (CD) board.

r RF signal waveform

VOLT/DIV : 200mV TIME/DIV : 500ns

level : 1.3

Adjustment Location : BD (CD) board. (see page 13)

– 20 –

0.3Vp-p

E-F Balance Check

oscilloscope (DC range)

BD (CD) board TP (TEO)

TP (VC)

–

Procedure :

1. Connect TP ADJ (IC301 @• pin) to ground with lead wire on Main board.

2. Connect oscilloscope to test point TP (VC) and TP (TEO) on BD (CD) board.

3. Turned Power switc h on.

4. Put disc (YEDS-18) in and press the ^ button.

5. Confirm that the osilloscope waveform is symmetrical on the top and bottom in relation to 0V, and check this level.

Traverse waveform

level : 300 ± 100mVp-p

Adjustment Location [BD (CD) BOARD] (Conductor side)

RV103

IC104

RV101

TEO

IC101

FEO

RV102

GND

FOK

IC102

TE1

FE1

PCK

specified value : r

A–B

2 (A+B)

A+B = 300 ± 100mVp-p

X100 = less than ± 7%

6. Remove the lead wire connected in step 1.

Focus/Tracking Gain Adjustment (RV102, RV103)

This gain has a margin, so even if it is slightly off. There is no problem. Therefore, do not perform, this adjustment. Please note that it should be fixed to mechanical center position when you moved and do not know original position.

– 21 –

+ 47 hidden pages