Sony ZS-M35 Service manual

ZS-M35

SERVICE MANUAL

Ver 1.3 2001.07

Photo: black

U.S. and foreign patents licensed from Dolby Laboratories Licensing Corporation.

CD Section

MD Section

AEP Model

UK Model

Tourist Model

Model Name Using Similar Mechanism ZS-M50

CD Mechanism Type KSM-213CDM

Optical Pick-up Name KSS-213C

Model Name Using Similar Mechanism PMC-MD55

MD Mechanism Type MDM-5GA

Base Unit Name MBU-5A

Optical Pick-up Name KMS-260B

CD player section

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs Wave length: 785 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.)

Spindle speed

200 r/min (rpm) to 500 r/min (rpm) (CLV)

Number of programme positions

Frequency response

20 - 20,000 Hz +1/–2 dB

Wow and flutter

Below measurable limit

Radio section

Frequency range

FM: 87.5 - 108 MHz MW: 531 - 1,602 kHz LW: 153 - 279 kHz

FM: 10.7 MHz MW/LW: 450 kHz

Aerials

FM: Telescopic aerial

External aerial terminal

MW/LW: External aerial terminals

SPECIFICATIONS

MD player section

System

Minidisc digital audio system

Disc

MiniDisc

Laser diode properties

Recording/playback time

Stereo recording: Maximum 80 minutes (with MDW-80) Monaural recording: Maximum 160 minutes (with MDW-80)

Revolutions

400 rpm to 900 rpm (CLV)

Error correction

Advanced Cross Interleave Reed Solomon Code (ACIRC)

Sampling frequency

44.1 kHz

– Continued on next page –

PERSONAL MINIDISC SYSTEM

9-927-183-13

2001G0400-1

Sony Corporation

Personal Audio Company

Shinagawa Tec Service Manual Production Group

– 1 –

Coding

Adaptive TRansform Acoustic Coding (ATRAC)

Modulation system

EFM (Eight-to-Fourteen Modulation)

Number of programme positions

2 stereo programme positions

Frequency response

20 - 20,000 Hz +1/–2 dB

Signal-to-noise ratio

Over 80 dB (during playback)

Wow and flutter

Below measurable limit

General

Speaker

Full-range: 8 cm (3 in.) dia.,4 ohms, cone type (2)

Inputs

LINE IN (stereo minijack):Sensitivity 436 mV/ 870 mV

Outputs

Headphones jack (stereo minijack) (1): For 32 ohms impedance headphones

Maximum power output

5 W + 5 W

Power requirements

For personal minidisc system: 230 V AC, 50 Hz For back-up memory:

4.5 V DC, 3 R6 (size AA) batteries For remote control: 3 V DC, 2 R6 (size AA) batteries

Power consumption

24 W

Dimensions (incl.projecting parts)

approx. 498.5 × 173.5 × 227 mm (w/h/d) (19 3/4 × 6 7/8 × 11 inches)

Mass

approx. 5.2 kg (11 lb. 7 oz)

Supplied accessories

Mains lead (1) Remote control (RMT-CM35AD) (1) MW/LW loop aerial (1)

Design and specifications are subject to change without notice.

– 2 –

TABLE OF CONTENTS

1. SERVICING NOTES

1-1. Notes on Handling the Optical Pick-up Block or Base Unit .. 4

1-2. Notes on Laser Diode Emission Check............................... 4

1-3. Notes on Chip Component Replacement ............................ 4

1-4. Flexible Circuit Board Repairing ........................................4

1-5. Chuck Plate Jig on Repairing .............................................. 4

1-6. Demonstration ..................................................................... 4

1-7. Checking the Laser Diode and Focus Search Operation..... 4

1-8. Jig for Checking BD Board Waveform ...............................5

1-9. Checks Prior to Parts Replacement and Adjustments ......... 6

1-10. Change of Pulley ................................................................. 6

2. GENERAL

Playing a CD .......................................................................7

Recording a whole CD ........................................................7

Playing an MD..................................................................... 8

Listening to the radio........................................................... 8

3. DISASSEMBLY

3-1. Cabinet (Rear) Assy ............................................................ 9

3-2. Power Board ........................................................................ 9

3-3. Cabinet (Upper) Assy........................................................ 10

3-4. MD Block Assy................................................................. 10

3-5. Tuner Board....................................................................... 11

3-6. Jack Board ......................................................................... 11

3-7. LED Board ........................................................................ 12

3-8. Key Board .........................................................................12

3-9. Top Board .......................................................................... 13

3-10. FL Board ........................................................................... 13

3-11. Main board ........................................................................ 14

3-12. CD Board ..........................................................................14

3-13. CD Mechanism Block ....................................................... 15

3-14. DG Board .......................................................................... 15

3-15. Plate (Front), Shield .......................................................... 16

3-16. MD Mechanism Block-1 (MDM-5GA) ............................ 16

3-17. MD Mechanism Block-2 (Slider (Cam) Assy) ................. 17

3-18. MD Mechanism Block-3 (BD Board)............................... 18

3-19. MD Mechanism Black-4 (SW Board)............................... 18

6. DIAGRAMS

6-1. IC Pin Function Descriptions ............................................ 35

6-2. Circuit Boards Location .................................................... 44

6-3. Block Diagram –Tuner Section–....................................... 45

6-4. Block Diagram –MD Section–.......................................... 48

6-5. Block Diagram –CD Section–........................................... 51

6-6. Block Diagram –Audio Section– ...................................... 53

6-7. Schematic Diagram –CD Section (1/2)–........................... 55

6-8. Schematic Diagram –CD Section (2/2)–........................... 57

6-9. Printed Wiring Boards –CD Section– ............................... 59

6-10. Printed W iring Boards –Tuner Section– ........................... 61

6-11. Schematic Diagrams –Tuner Section– .............................. 63

6-12. Printed Wiring Boards –BD Section– ............................... 65

6-13. Schematic Diagram –BD Section (1/2)–........................... 67

6-14. Schematic Diagrams –BD Section (2/2)– ......................... 69

6-15. Schematic Diagram –DG Section– ................................... 71

6-16. Schematic Diagram –DG Section– ................................... 73

6-17. Printed Wiring Board –DG Section– ................................. 75

6-18. Printed Wiring Board –Main Section– .............................. 77

6-19. Schematic Diagram –Main Section (1/3)–........................ 79

6-20. Schematic Diagram –Main Section (2/3)–........................ 81

6-21. Schematic Diagram –Main Section (3/3)–........................ 83

6-22. Printed Wiring Boards –Panel Section–............................ 85

6-23. Schematic Diagrams –Panel Section–............................... 87

6-24. Printed Wiring Boards –Switch Section– .......................... 89

6-25. Schematic Diagrams –Switch Section– ............................ 91

6-26. Printed Wiring Boards –Power Supply Section– .............. 93

6-27. Schematic Diagrams –Power Supply Section– ................. 95

6-28. IC Block Diagrams............................................................ 97

7. EXPLODED VIEWS

7-1. Cabinet (Rear) Section .................................................... 103

7-2. Cabinet (Front) Section ................................................... 104

7-3. Cabinet (Upper) Section.................................................. 105

7-4. MD Block Section........................................................... 106

7-5. MD Mechanism Section (MDM-5GA).......................... 107

7-6. MD Base unit Section (MBU-5A) ................................. 108

7-7. Optical Pick-up Section (KSM-213CDM)...................... 109

4. TEST MODE

4-1. MD section ........................................................................ 19

5. ELECTRICAL ADJUSTMENTS

5-1. Tuner section ..................................................................... 24

5-2. MD section ........................................................................ 26

5-3. CD section ......................................................................... 33

8. ELECTRICAL PARTS LIST.................................... 110

– 3 –

SECTION 1

SERVICING NOTES

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

CAUTION

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

1-1. 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.

1-2. 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 from more than 30 cm away from the objective lens.

1-3. NO TES ON CHIP COMPONENT REPLACEMENT

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

1-5. CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig.

• Code number of Chuck Plate Jig: X-4918-255-1

1-6. DEMONSTRATION

This set enters the demonstration mode about 10 seconds after the power cord is connected. The demonstration displays such as “DEMONSTRATION MODE” and “CREA TE YOUR ORIGINAL MD” then appears. When no operation is entered for one minute after the [OPERATE] button is turned on, the demonstration mode is also entered. T o release the demonstration mode, set the timer in this set or press and hold down the [NO/CANCEL] button for about 2 seconds.

1-7. CHECKING THE LASER DIODE AND FOCUS

SEARCH OPERATION

1. Turn on the POWER and open the CD cover.

2. As shown below, push S402 (CD DOOR) with a screwdriver or other tool.

3. Press the CD button.

4. Check the objective lens to make sure that the laser diode is emitting light. If not so, the auto power control circuit or optical pickup would be damaged. Verify that the objective lens moves vertically three times for focus search.

1-4. FLEXIBLE CIRCUIT BOARD REPAIRING

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

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

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

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY P AR TS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

S402

– 4 –

1-8. 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-

IOP I+3V

GND

– 5 –

1-9. CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS (FOR MD SECTION)

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 (6-1 : See page 28)

Focus bias check (6-2 : See page 28)

C PLAY check (6-3 : See page 28)

Self-recording/playback check (6-4 : See page 28)

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

• Error rate check Specified value : For points a, b, and c C1 error : About 200 ADER : Below 2

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

C1 error : Below 80 ADER : Below 2

b. When using check disc (TDYS-1)

C1 error : Below 50

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

• 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

Measure if unsatisfactory:

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.

1-10. CHANGE OF PULLEY

pulley

M102, 103

Install the pulley to the motor.

2.5 m

– 6 –

SECTION 2

GENERAL

This section is extracted from instruction manual.

Playing a CD

For hookup instructions, see pages 64 - 67.

1 Press Z PUSH OPEN/CLOSE

2 Close the lid of the CD

down to open the CD compartment and place the CD on the CD compartment.

compartment.

With the label side up

Tip

Next time you want to listen to a CD, just press CD u . The player turns on automatically and starts playing the CD.

Use these buttons for additional operations

CD u

., >

To Press

adjust the volume VOLUME +, –

stop playback CD x pause playback CD u (CD X on the

go to the next track > go back to the previous track . remove the CD Z PUSH OPEN/CLOSE turn on/off the player OPERATE

CDx

(VOL +, – on the remote)

remote) Press the button again to resume play after pause.

PUSH

OPEN/CLOSE

VOLUME –, + OPERATE

3 Press

remote). The player turns on (direct

power-on) and the player plays all the tracks once.

(CD N on the

Recording a whole CD

(Synchronized recording)

3421

For hookup instructions, see pages 64 - 67.

1 Insert a recordable MD (direct

Insert in the direction of arrow

2 Press PUSH OPEN/CLOSE

3 Press CD

power-on).

With the label side up

and place the CD on the CD compartment.

Press PUSH OPEN/CLOSE again to close the CD compartment.

Display

Track number

Display

After “TOC Reading” is displayed, the disc name will be displayed if it is labelled.

With the label side up

Playing time

Notes

•

stop recording, do not disconnect the mains lead or move the player while “TOC EDIT” is flashing in the display. If you do so,

recording may not be done properly.

• W hen you record a whole CD, you cannot pause recording.

Tips

• Adjusting the volume or the audio emphasis (page 56) will not affect the recording level. Keep the volume at a moderate level so as to prevent the sound from skipping.

• To record over the previous recording, see page 40.

• Once the clock is set, the recording date and time are stamped automatically (page 57).

• You can label an MD or a track during recording (page 51).

After you

To record at high speed, press HIGH SPEED. The indicator lights up. To record at normal speed, skip this step.

Press SYNCHRO REC CD MD.

The player starts recording automatically.

If the MD has any previous recording, recording will be made from the last recorded position.

Use these buttons for additional operations

OPERATE

To Press

stop recording MD x or CD turn on/off the player OPERATE

If “CD>MD OK?” alternates with time display There is not enough space on the MD to record the whole CD. If it is all right to record as much as possible and cancel recording of some tracks, press YES•ENTER. To stop recording, press NO•CANCEL. If any other messages are displayed, see page 80.

Track number of MD

CD MD

Remaining recording time of MD

YES ENTER

NO CANCEL

– 7 –

Playing an MD

Use these buttons for additional operations

MD u

MD x

VOLUME –, +

OPERATE

For hookup instructions, see pages 64 - 67.

1 Insert the MD (direct power-on).

With the label side up

Insert in the direction of the arrow

2 Press MD u (MD N on the

remote). The player plays all the tracks

once.

Listening to the radio

Display

After “TOC Reading” is displayed, the disc name will be displayed if it is labelled.

Track name is displayed

Track number

Playing time

Tip

Next time you want to listen to a MD, just press MD u . The player turns on automatically and starts playing the

To Press

adjust the volume VOLUME +, –

stop playback MD x pause playback MD u (MD X on the

MD.

go to the next track > go back to the previous track . remove the MD Z turn on/off the player OPERATE

Use these buttons for additional operations

OPERATE

(VOL +, – on the remote)

remote) Press the button again to resume play after pause.

VOLUME –, +

MONO/ST REPEAT

Tips

• The “FM1” and “FM2” bands have the same

For hookup instructions, see pages 64 - 67.

Press RADIO BAND until the band you want appears in the display (direct power-on).

Hold down TUNE + or TUNE – until the frequency digits begin to change in the display.

The player automatically scans the radio frequencies and stops when it finds a clear station.

If you can’t tune in a station, press TUNE + or TUNE – repeatedly to change the frequency step by step.

Display

“FM1”, “FM2”, “MW” or “LW” appears

Indicates an FM stereo broadcast

functions. You can store the stations you want separately in “FM1” and

“FM2” (page 22).

• If the FM broadcast is

noisy, press MONO/ ST•REPEAT (MODE on the remote) until “Mono” appears in the display and radio will play in monaural.

• N ext time you want to listen to the radio, just press RADIO BAND. The player turns on automatically and starts playing the previous station.

To Press

adjust the volume VOLUME +, –

turn on/off the radio OPERATE

To improve broadcast reception FM:

Set the FM ANTENNA SELECTOR at the rear of the player to “

Reorient the aerial for FM.

MW/LW:

Keep the MW/LW loop aerial as far as possible from the player and reorient it.

If the broadcast is still noisy, connect the external aerial (page

(VOL +, – on the remote)

” (telescopic aerial).

67).

– 8 –

SECTION 3

Set Cabinet (Rear)

Assy

FL Board Main

Board

CD Board

CD Mechanism Block

Cabinet (Upper) Assy Power Board

DG Board LED Board Plate (Front), Shield

Tuner Board

Top Board MD Block Assy

Jack Board

Key Board

MD Mechanism Block - 1 (MDM-5GA)

MD Mechanism Block - 2 (Slider (Cam) Assy)

MD Mechanism Block - 3 (BD Board)

MD Mechanism Block - 4 (SW board)

DISASSEMBLY

Note : This set can be disassemble according to the following sequence.

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

3-1. CABINET (REAR) ASSY

7 CN401

6 CN402

1 BVTP 3x12

handle

3-2. POWER BOARD

8 cabinet (rear) assy

chassis, transformer

3 BVTP 4x12

4 BVTP 3x12

5 BVTP 3x14

cabinet (rear) assy

3 BVTP 3x14

4 BVTP 3x12

2 BVTP 3x1

1 BVTP 3x12

2 CN903

– 9 –

6 POWER board

3-3. CABINET (UPPER) ASSY

9 CN406

qacabinet (upper) assy

2 CN705

3 CN404

4 connector

q; CN409

3-4. MD BLOCK ASSY

8 CN407

7 CN303

6 CN408

1 BVTP 3x10

5 CN301

3 MD block assy

1 CN2

2 BVTP 3x1

– 10 –

3-5. TUNER BOARD

1 BVTP 3x10

chassis (TU)

3-6. JACK BOARD

4 BVTP 3x10

5 TUNER board

8 Remove the solders.

2 BVTP 3x10

6 BVTP 3x10

7 ANTENNA SW board

3 BVTP 3x10

3 JACK board

– 11 –

1 BVTP 2.6x

2 CN306

3-7. LED BOARD

1 BVTP 2.6x8

2 BVTP 2.6x8

3 LED board

3-8. KEY BOARD

1 BVTP 2.6x

2 BVTP 2.6x8

3 KEY board

– 12 –

3-9. TOP BOARD

2 BVTP 3x10

3 FL board

1 CN405

3-10. FL BOARD

4 button (top) assy

3 BVTP 2.6x8

1 BVTP 2.6x

5 TOP board

– 13 –

3-11. MAIN BOARD

5 BVTP 3x10

6 BVTP 3x10

8 MAIN board

7 CN403

2 CN707

1 CN410

3 CN704

4 BVTP 3x10

CD board

3-12. CD BOARD

5 CD board

3 BVTP 3x10

1 CN801

2 BVTP 3x10

4 CN701

– 14 –

3-13. CD MECHANISM BLOCK

4 CD mechanism block

1 PWH 2.6x10

2 PWH 2.6x10

3-14. DG BOARD

4 P 2.6x5

q; DG board

1 P 2.6x5

2 plate (lower) assy, shield

5 CN605

6 CN603

3 P 2.6x5

8 CN602

9 CN601

claws

– 15 –

3-15. PLATE (FRONT), SHIELD

3 plate (front), shield

2 P 2.6x5

1 P 2.6x5

3-16. MD MECHANISM BLOCK-1 (MDM-5GA)

4 claws

7 BVTTWH M3

9 MD mechanism block

(MDM-5GA)

8 harnes

3 claws

5 shield (upper)

6 BVTTWH M3

2 P 2.6x5

1 P 2.6x5

– 16 –

3-17. MD MECHANISM BLOCK-2 (SLIDER (CAM) ASSY)

6 slider (cam) assy

3 bracket (guide L)

1 BV 2.6 (1T3B)

2 spring, leaf

4 BV 2.6 (1T3B)

press fitting shaft

5 bracket (guide R)

horizontal

When assembling, set the press fitting shaft of the cam gear horizontal to the lever (head).

lever (head)

cam gear

When assembling, insert the shaft of the lever (O/C) with A part fit in the slot.

– 17 –

3-18. MD MECHANISM BLOCK-3 (BD BOARD)

5 CN104

6 CN101

1 BV 2.6 (1T3B)

2 MD base unit

BD board (side A)

4 M 1.7

3-19. MD MECHANISM BLOCK-4 (SW BOARD)

3 PWH 1.7x4

6 SW board

7 BD board

2 gear (B)

3 Removal the solders

1 PTPWH M 2.6x6

4 motor assy, loading

5 BTP 2.6x6

– 18 –

SECTION 4

TEST MODE

Refer to “5. ELECTRICAL ADJUSTMENT” for the test mode of CD section.

4-1. MD SECTION

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 Z (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 Z (MD) button after pressing the [REC/REC MODE] button and the rotation of disc is stopped.

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)

• When pressing the

2. SETTING THE TEST MODE

1. Set to standby state.

2. Press the buttons [SOUND] and [EDIT] and . (TUNE –) at the same time and then release them soon (within 100m sec). The TEST

MODE is entered.

3. RELEASING THE TEST MODE

Hold down the [OPERATE] button and remove the power cord to reset the set.

[REC] button.

4. BASIC OPERATIONS OF THE TEST MODE

All operations are performed with the following buttons: u (MD), x (MD), [RADIO/BAND], and [REC/REC MODE]. The functions of these buttons are as follows.

Function name Function

u (MD) Proceeds the parameter/mode change. x (MD) Returns to the parameter/mode change.

RADIO/BAND Goes ahead. Determines the setting/selection. REC/REC MODE Suspends.

– 19 –

5. SELECTING THE TEST MODE

There are 9 types of test modes as shown below. The groups can be switched by press the u (MD) or x (MD) button. After selecting the group to be used, press the

[RADIO/BAND] button. After setting a certain group, press the u (MD) or x (MD) button between these modes.

Display

TEMP ADJUST LDPWR ADJUST LDPWR CHECK EFBAL ADJUST FBIAS ADJUST FBIAS CHECK CPLAY MODE CREC MODE EEP MODE

• For details of each adjustment mode, refer to “5. Electrical Adjustments”.

• If a different mode has been selected by mistake, press the

• EEP MODE is not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the

button to release the mode immediately. Be especially careful this mode will overwrite the non-volatile memory and reset it, and as a result, the unit will not operate normally.

Temperature compensation offset adjustment Laser power adjustment Laser power check EF balance adjustment Focus bias adjustment Focus bias check Continuous playback mode Continuous recording mode Non-volatile memory control

Contents

[REC/REC MODE] button to release that mode.

[REC/REC MODE]

– 20 –

5-1. Operating the Continuous Playback Mode

1. Entering the continuous playback mode

(1) Set the disc in the unit. (Whichever recordable discs or discs for playback only are available) (2) Press the u (MD) or x (MD) button to display “CPLAY MODE”. (3) Press the (4) When access completes, the display changes to “C1 =

Note: The numbers “

2. Changing the parts to be played back

(1) Press the

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 “

3. Ending the continuous playback mode

(1) Press the (2) Press the Z (MD) button and take out the disc.

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

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

1. Entering the continuous recording mode

(1) Set a recordable disc in the unit. (2) Press the u (MD) or x (MD) button to display “CREC MODE”. (3) Press the (4) When access completes, the display changes to “CREC (

Note: The numbers “

2. Changing the parts to be recorded

(1) When the

[RADIO/BAND] button to change the display to “CPLAY MID”.

AD = ”.

” displayed show you error rates and ADER.

[RADIO/BAND] button during continuous playback to change the display as below.

“CPLAY MID” t “CPLAY OUT” t “CPLAY IN”

” displayed show you error rates and ADER.

[REC/REC MODE] button. The display will change to “CPLAY MODE”.

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

[RADIO/BAND] button to change the display to “CREC MID”.

)” and “[REC]” lights up.

” displayed shows you the recording position addresses.

[RADIO/BAND] button is pressed during continuous recording, the display changes as below.

“CREC MID” t “CREC OUT” t “CREC IN”

When pressed another time, the parts to be recorded can be changed. “

(2) When access completes, the display changes to “CREC (

Note: The numbers “

3. Ending the continuous recording mode

(1) Press the (2) Press the Z (MD) button and take out the disc.

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

Note 2: The 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.

5-3. 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 the unit entered this mode accidentally, press the

[REC/REC MODE] button. The display changes to “CREC MODE” and “[REC]” goes off.

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

[REC/REC MODE] button can be used to stop recording anytime.

” displayed shows you the recording position addresses.

)” and “[REC]” lights up.

[REC]” goes off.

[REC/REC MODE] button immediately to release it.

– 21 –

6. FUNCTIONS OF OTHER BUTTONS

Function

u (MD) and EDIT

x (MD) and EDIT > .

REC/REC MODE and EDIT x (CD) and EDIT RADIO/BAND and EDIT LINE/LINE LEVEL Z (MD) OPERATE

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. When pressed during continuous playback, REC ON/OFF. Switches between the pit and groove modes when pressed. When pressed during continuous playback, switches the spindle servo mode (CLV-S y CLV-A). Switches the displayed contents each time the button is pressed Ejects the disc Releases the test mode

Contents

7. TEST MODE DISPLAYS

Each time the [LINE/LINE LEVEL] 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 = ssss AD = ss C1 = Indicates the C1 error. AD = Indicates ADER.

Mode display

Error rate display

Address display

3. Address display The address is displayed as follows. (MO: recordable disc, CD: playback only disc) Press the x (CD) and [EDIT] buttons at the same time to switches between the groove display and pit display. h = ssss s = ssss (MO pit and CD) h = ssss a = ssss (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address.

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

4. Auto gain display (Not used in servicing) The auto gain is displayed as follows. AG F = ss T = ss

5. IVR display (Not used in servicing) The IVR is displayed as follows. [ss][ss][ss]

Auto gain display

(Not used in servicing)

IVR display

(Not used in servicing)

– 22 –

MEANINGS OF OTHER DISPLAYS

Display

SHUF PGM

[REC]

TOC EDIT TRACK TIMER

When Lit

During continuous playback (CLV: ON) Tracking servo OFF Recording mode ON ABCD adjustment completed Pit CLV-S

Contents

When Off

STOP (CLV: OFF) Tracking servo ON Recording mode OFF

Groove CLV-A

– 23 –

)

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. TUNER SECTION 0 dB = 1 µV

Precautions in Repairing

Note : As a tuner unit (TU1) is difficult to repair if faulty,

replace it with new one.

• MW/LW Section

Setting:

BAND button: MW or LW

AM RF signal generator

Put the lead-wire antenna close to the supplied MW/LW loop aerial.

30% amplitude modulation by 400 Hz signal output level : as low as possible

• FM Section

Setting:

BAND button: FM

FM RF signal generator

FM antenna (JW1,2)

0.01 µF set

22.5 kHz frequency deviation by 400 Hz signal output level : as low as possible

• Connecting Level Meter (FM, MW and LW)

level meter (range: 0.5-5 V ac

32 Ω

set

i jack (J301)

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

450 kHz

MW FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 531 kHz 1,611 kHz Reading on Digital voltmeter 1.0 ± 0.3 V 5.3 ± 0.3 V Adjustment Part L5 CT4

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 CT2

621 kHz 1,404 kHz

FM FREQUENCY COVERAGE

CHECK

Frequency Display 87.5 MHz 108 MHz

Reading on Digital voltmeter 1.4

+ 0.6 V – 0.4 V – 1.0 V

6.9

+ 1.1 V

Adjustment Part <confirmation> <confirmation>

FM TRACKING CHECK

Adjust for a maximum reading on level meter.

87.5 MHz 108 MHz

LW FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 153 kHz 279 kHz

Reading on Digital voltmeter 0.7

+ 0.5 V – 0.2 V

5.3 ± 0.2 V

Adjustment Part <confirmation> CT3

• Connecting Digital Voltmeter (FM, MW and LW)

digital voltmeter

tuner board TP (VT)

• Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

LW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 CT1

162 kHz 261 kHz

Adjustment Location: TUNER board (See page 25.)

– 24 –

Adjustment Location:

(COMPONENT SIDE)

JW1 JW2

AM IF

ADJUSTMENT

TRACKING

ADJUSTMENT

FREQUENCY

COVERAGE

ADJUSTMENT

CT3 LW

CT1

TP(VT)

CT4

CT2

FREQUENCY

COVERAGE

ADJUSTMEN

TRACKING

ADJUSTMEN

– 25 –

5-2. MD SECTION

1. PARTS REPLACEMENT AND ADJUSTMENT

• Check and adjust the mechanism deck as follows. The procedure changes according to the part replaced.

• Laser power check

• Focus bias check

• C PLAY check

• Self-recording/playback check

Parts Replacement and Repair

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

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

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?

YES

IOP information recording (IOP value labeled on OP)

YES

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

– 26 –

2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION

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

3. PRECAUTIONS FOR USE OF OPTICAL PICK-UP (KMS-260B)

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

Optical pick-up flexible board

flexible board

4. Use the following tools and measuring device.

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

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

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

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

• Oscilloscope (Measure after performing CAL of prove)

• Digital voltmeter

• Thermometer

• Jig for checking BD board waveform

(Part 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 Notes on page 5)

7. As the disc used will affect the adjustment results, make sure that not dusts nor fingerprints are attached to it.

Laser Power Meter

When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. J-2501-145-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 optical pick-up.

4. PRECAUTIONS FOR ADJUSTMENTS

1. When replacing the following parts, perform the adjustments and checks with

1.Temperature compensation offset adjustment

2.Laser power adjustment

3.EF balance adjustment

4.Focus bias adjustment

5.Error rate check

2. Set the test mode when performing adjustments. After completing the adjustments, release 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.

in the order shown in the following table.

Optical

Pick-up

IC171 D101 IC101, IC121 IC192

BD Board

5. CREATING CONTINUOUSLY-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. Press the u (MD) or x (MD) button to display “CREC MODE”.

3. Press the [RADIO/BAND] button again to display “CREC MID”. Display “CREC (0300)” and start to recording.

4. Complete recording within 5 minutes.

5. Press the [REC/REC MODE] button and stop recording.

6. Press the Z (MD) button and remove the disc.

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

Note:

• Be careful not to apply vibration during continuous recording.

– 27 –

6. CHECK PRIOR TO REPAIRS

These checks are performed 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 6).

6-1. Laser Power Check

Connection:

Optical pick-up objective lens

BD board

CN110 pin 5 (I +3V) CN110 pin 4 (IOP)

laser power mete

digital voltmete

+ –

6-2. Focus Bias Check

Change the focus bias and check the focus tolerance amount.

Checking Procedure:

1. Load the test disc (MDW-74/AU-1).

2. Press the u (MD) or x (MD) button to display “CPLAY MODE”.

3. Press the [RADIO/BAND] button twice to display “CPLAY MID”.

4. Press the [REC/REC MODE] button when “C1 =

AD = ”

is displayed.

5. Turn the JOG dial to display “FBIAS CHECK”.

6. Press the [RADIO/BAND] button to 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 below 2.

7. Press the [RADIO/BAND] button to display “ / b = ”. Check that the C1 error is about 200 and ADER is below 2.

8. Press the [RADIO/BAND] button to display “

/ a = ”.

Check that the C1 error is about 200 and ADER is below 2.

9. Press the [REC/REC MODE] button, then press the Z (MD) button and take out the test disc.

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 . button or > button to move the optical pick-up) Connect the digital voltmeter to CN110 pin 5 (I+3 V) and CN110 pin 4 (IOP) on the BD board.

2. Press the u (MD) or x (MD) button to display “LDPWR CHECK”.

3. Press the [RADIO/BAND] button once to display “LD 0.9 mW $

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

0.84 to 0.92 mW.

4. Press the [RADIO/BAND] button once more to display “LD 7.0 mW $

”. Check that the reading the laser power meter and

digital voltmeter satisfy the specified value.

Specified Value:

Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label

± 10 %

(Optical pick-up label)

KMS260B

27X40 B0825

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

5. Press the [REC/REC MODE] button to display “LDPWR CHECK” and stop the laser emission. (The [REC/REC MODE] button is effective at all times to stop the laser emission)

Note 1: After step 4, each time the [RADIO/BAND] button is pressed, the

display will be switched “LD 0.7 mW $ ”, “LD 6.2 mW $ ”, and “LD WP $ ”. Nothing needs to be performed here. ( = correction)

6-3. C PLAY Check MO Error Rate Check

Checking Procedure:

1. Load the test disc (MDW-74/AU-1).

2. Press the u (MD) or x (MD) button to display “CPLAY MODE”.

3. Press the [RADIO/BAND] button to 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 [REC/REC MODE] button to stop playback, then press the Z (MD) button and take out the test disc.

CD Error Rate Check

Checking Procedure:

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

2. Press the u (MD) or x (MD) button to display “CPLAY MODE”.

3. Press the [RADIO/BAND] button twice to display “CPLAY MID”.

4. The display changes to “C1 =

AD = ”.

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

6. Press the [REC/REC MODE] button to stop playback, then press the Z (MD) button and take out the check disc.

6-4. Self-Recording/playback Check

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

Checking Procedure:

1. Load a recordable disc (blank disc).

2. Press the u (MD) or x (MD) button to display “CREC MODE”.

3. Press the [RADIO/BAND] button to display “CREC MID”.

4. When recording starts, lights up “[REC]” and display “CREC @@@@” (@@@@ is the address).

5. About 1 minute later, press the [REC/REC MODE] button to stop continuous recording.

6. Turn the JOG dial to display “CPLAY MODE”.

7. Press the [RADIO/BAND] button to display “CPLAY MID”.

8. “C1 = AD = ” will be displayed.

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

10. Press the [REC/REC MODE] button to stop play back, then press the Z (MD) button and take out the disc.

Note: After the TEST MODE is entered, insert the disc.

– 28 –

7. 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 of 22 °C to 28 °C.

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

Adjusting Procedure:

1. Press the u (MD) or x (MD) button to display “TEMP ADJUST”.

2. Press the [RADIO/BAND] button to select the “TEMP ADJUST” mode.

3. “TEMP = ” and the current temperature data will be displayed.

4. To save the data, press the [RADIO/BAND] button. When not saving the data, press the [REC/REC MODE] button.

5. When the [RADIO/BAND] button is pressed, “TEMP = will be displayed and turned back to “TEMP ADJUST” display then. When the [REC/REC MODE] button is pressed, “TEMP ADJUST” will be displayed immediately.

Specified Value:

The “TEMP =

” should be within “E0 - EF”, “F0 - FF”, “00 -

0F”, “10 - 1F” and “20 - 2F”.

SA VE”

7. Then, press the u (MD) or x (MD) to display “LDPWR CHECK”.

8. Press the [RADIO/BAND] button once to display “LD 0.9mW $

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

0.85 to 0.91 mW.

9. Press the [RADIO/BAND] button once more to display “LD 7.0 mW $

”. Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Note down the digital voltmeter reading value.

Specified Value:

Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label

± 10%

(Optical pick-up label)

KMS260B

27X40 B0825

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

10. Press the [REC/REC MODE] button to display “LDPWR CHECK” and stop the laser emission. (The [REC/REC MODE] button is effective at all times to stop the laser emission)

8. LASER POWER ADJUSTMENT

Connection:

Optical pick-up objective lens

BD board

CN110 pin 5 (I +3V) CN110 pin 4 (IOP)

Adjusting Procedure:

2. Press the u (MD) or x (MD) button to display “LDPWR ADJUST”. (Laser power: For adjustment)

3. Press the [RADIO/BAND] button once to display “LD 0.9 mW $

”.

4. Press the u (MD) or x (MD) button so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the [RADIO/BAND] button after setting the range knob of the laser power meter, and save the adjustment results. (“LD SAVE $

” will be displayed for a moment)

5. Then “LD 7.0 mW $

” will be displayed.

6. Press the u (MD) or x (MD) button and adjust so that the reading on the laser power meter is 6.9 to 7.1 mV. Press the [RADIO/BAND] button to save the setting.

laser power mete

digital voltmete

–

Note 1: After step 9, each time the [RADIO/BAND] button is pressed, the

display will be switched “LD 0.7 mW $ ”, “LD 6.2 mW $ ”, and “LD WP $ ”. Nothing needs to be performed here. ( = correction)

Note: Do not perform the emission with 7.0 mW more than 15 seconds

continuously.

– 29 –

9. EF BALANCE ADJUSTMENT

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

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

used in this adjustment.

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

BD board

CN110 pin 3 (TEO)

CN110 pin 1 (VC)

330 k Ω

oscilloscope

(DC range)

–

10 pF

8. Press the u (MD) or x (MD) button so that the waveform of the oscilloscope becomes the specified value. (When the JOG dial is turned, the

of “EFB- ” changes and the waveform changes) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Write power traverse adjustment)

T r av erse W a vef orm

Connection:

oscilloscope

(DC range)

BD board

CN110 pin 3 (TEO) CN110 pin 1 (VC)

–

V: 0.1 V/div H: 10 ms/div

Adjusting Procedure:

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

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

3. Press the > button to move the optical pick-up outside the pit.

4. Press the u (MD) or x (MD) button to display “EFBAL ADJUST”.

5. Press the [RADIO/BAND] button to display “EFB =

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

6. Press the u (MD) or x (MD) button so that the waveform of the oscilloscope becomes the specified value. (When the u (MD) or x (MD) button is pressed, the of

“EFB =

” changes and the waveform changes ) In this adjust-

ment, waveform varies at intervals of approx. 2 %. Adjust the waveform so that the specified value is satisfied as much as possible. (Read power traverse adjustment)

T r averse Waveform

Specification A = B

7. Press the [RADIO/BAND] button and save the result of adjustment to the non-volatile memory. (“EFB = displayed for a moment. Then “EFB =

SAVE” will be

MO-W” will be dis-

played)

Specification A = B

9. Press the [RADIO/BAND] button, and save the adjustment results in the non-volatile memory. (“EFB =

SAVE” will be

displayed for a moment)

10. “EFB =

MO-P” will be displayed. The optical pick-up moves to the pit area automatically and servo is imposed.

11. Press the u (MD) or x (MD) button until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.

T r av erse W a vef orm

Specification A = B

12. Press the [RADIO/BAND] button, and save the adjustment results in the non-volatile memory. (“EFB =

SABE” will be displayed for a moment) Next “EFBAL ADJUST” is displayed. The disc stops rotating automatically.

13. Press the Z (MD) button and take out the disc.

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

15. Press the [RADIO/BAND] button to display “EFB =

CD”. Servo

is imposed automatically.

16. Turn the JOG dial so that the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.

T r av erse W a vef orm

– 30 –

Specification A = B

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