Sony MZ-R30 Service Manual

MZ-R30

SERVICE MANUAL

US and foreign patents licensed from Dolby Laboratories Licensing Corporation.

SPECIFICATIONS

US Model

Canadian Model

AEP Model

UK Model

E Model

Austr alian Model

Tourist Model

Model Name Using Similar Mechanism NEW MD Mechanism Type MT-MZR30-124 Optical Pick-up Type KMS-250A/J2N

MICROFILM

PORTABLE MINIDISC RECORDER

TABLE OF CONTENTS

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

1. SERVICE NOTE .................................................................. 3

2. GENERAL ............................................................................ 4

3. DISASSEMBLY

3-1. Upper Panel Assy, Bottom Panel Assy Removal.......... 20

3-2. Main Board Removal ................................................... 20

3-3. Mechanism Deck Removal........................................... 21

3-4. Optical Pick-up Assy, Control Board,

REC Board Removal .................................................... 21

3-5. Battery Case Assy Removal ......................................... 22

3-6. Switch board, Power Board Removal........................... 22

4. TEST MODE ...................................................................... 23

5. ELECTRICAL ADJUSTMENTS ..................................... 29

6. EXPLANATION OF IC TERMINALS ............................. 33

For customers in Europe

This MiniDisc Recorder is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the buttom exterior.

IN NO EVENT SHALL SELLER BE LIABLE FOR ANY DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE, OR LOSSES OR EXPENSES RESULTING FROM ANY DEFECTIVE PRODUCT OR THE USE OF ANY PRODUCT.

“MD WALKMAN” is a trademark of Sony Corporation.

CAUTION

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

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.

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.

7. DIAGRAMS

7-1. Block Diagram.............................................................. 37

7-2. Cricuit Boards Location ............................................... 41

7-3. Printed Wiring Boards – Main Section –...................... 42

7-4. Schematic Diagram – Main (1/3) Section – ................. 47

7-5. Schematic Diagram – Main (2/3) Section – ................. 51

7-6. Schematic Diagram – Main (3/3) Section – ................. 55

7-7. Schematic Diagram – Power Section – ....................... 57

7-8. Printed Wiring Boards – Control Section –.................. 60

7-9. Schematic Diagram – Control Section – ..................... 63

8. EXPLODED VIEWS

8-1. Upper Panel, Bottom Panel Section ............................. 69

8-2. Chassis Section ............................................................. 70

8-3. Mechanism Deck Section-1.......................................... 71

8-4. Mechanism Deck Section-2.......................................... 72

9. ELECTRICAL PARTS LIST ............................................ 73

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 P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMA TIQUES 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

– 2 –

SECTION 1

SERVICING NOTE

When repairing this device with the power on, if you remove the main board or open the upper panel assembly, this device stops working. In this case, you can work without the device stopping by fastening the hook of the Open/Close detection switch (S817) with tape.

Tape

Door open/close switch (S817)

Main board

– 3 –

SECTION 2

GENERAL

This section is extracted from instruction manual.

– 4 –

– 5 –

– 6 –

– 7 –

– 8 –

– 9 –

– 10 –

– 11 –

– 12 –

– 13 –

– 14 –

– 15 –

– 16 –

– 17 –

– 18 –

– 19 –

SECTION 3

DISASSENBLY

The equipment can be removed using the following procedure.

Set

Panel (upper, bottom) assy

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

3-1. UPPER PANEL ASSY, BOTTOM PANEL ASSY REMOVAL

Main board Mechanism deck

Battery case assy

Switch board Power board Battery case

Optical pick-up assy Control board Rec board

LCD flexible board (Main board, CN905)

Screws

(M1.4 precision pan)

Upper panel assy

(M1.4 precision pan)

3-2. MAIN BOARD REMOVAL

* Note for installation

Install the main board pressing the OPEN button on door open side. Sometime the open/close detection switch (S817) will be broken.

Flat cable

(24 core)

Screws

(1.7x2.5 tapping)

Screw

(M1.4 precision pan)

Screw (M1.7x2.5)

Screws

(M1.4 toothed lock)

Main board

Main assy

Screws

(M1.4 precision pan)

Bottom panel assy

Screws

(M1.4 precision pan)

OP flexible board

(Main board CN501)

Ornamental belt assy

Note for installation

After installing the main board, make the flexible board ride on the molding. If you hold the flexible board and main board with a pair of tweezers, the board will ride correctly.

JOG unit flexible board

(Main board CN904)

– 20 –

MD frexible board

(Main board CN502)

* Note for installation

After installing the main board, push the flexible board to the outside with a pair of tweezers. Otherwise, it may be caught between the optical pickup section and the molding.

3-3. MECHANISM DECK (MT-MZR30-124) REMOVAL

)

Remove the damper

fastening ring section.

Mechanism deck

Screws (Damper)

Ornamental belt ass

3-4. OPTICAL PICK-UP ASSY, CONTROL BOARD, REC BOARD REMOVAL

Screw

REC board

Insulating sheet

Control board

Remove solder

Mechanism deck

Screws (M1.4)

CLV flexible board

Head flexible board

(REC board, CN402)

Lever stopper

(M1.4x3, locking

Over wirte head

Optical pick-up assy

Screws

– 21 –

3-5. BATTERY CASE ASSY REMOVAL

Battery case assy

Ornamental bel

3-6. SWITCH BOARD, POWER BOARD REMOVAL

Power board

Remove solder

Battery case

Remove solder

Switch boar

Screws (M1.4)

– 22 –

SECTION 4

p key

+ key

VOLUME +key or – key

Display when Test Mode is Set

= key

Servo Mode Segment Section : 00 Dot Section : SERVO

Audio Mode Segment Section : 00 Dot Section : AUDIO

Power Mode Segment Section : 00 Dot Section : POWER

General Adjustment Mode Segment Section : 4000 Dot Section : Assy MODE

Mecha Mode Segment Section : 00 00 Dot Section : MECHA

Select dial number (blinks)

TEST MODE

[Outline]

• The general adjustment mode of this unit performs CD and MO adjustments automatically when set. In this mode, the disc is determined if CD or MO and adjustments are automatically performed in order. If errors are detected , the faulty locations are displayed. The servo mode performs each adjustment automatically.

[Setting the Test Mode]

Short-circuit the soldering bridge of TAP803 (TEST) on the main board (connect Pin @§ of IC801 to the GND) and turn on the power supply.

[MAIN BOARD] (SIDE A)

[Operations When Test Mode is Set]

When the test mode is set, the LCD will display as follows.

Self-diagnostic display (displayed while the DISPLAY key is pressed)

Segment section

Ver 00.75

Dot section

ROM version displayed

• The LCD performs the following repeatedly. ROM version displayed / all lit / all off

• The display can be held and checked by pressing P key.

• The self-diagnostic display appears while the DISPLAY key is pressed.

[Structure of Test Mode]

The test mode of this unit consists of the following five modes.

[Exiting the Test Mode]

Turn off the power supply and open the soldering bridge of TAP803 (TEST) on the main board.

• In modes other than the general adjustment mode, the last two digits of the mode number will be displayed at the 00 section.

– 23 –

[Servo Mode]

• Set the test mode, press the + key, and set the servo mode using the VOLUME + and – keys.

• When the servo mode is set, the optical pickup will move to the outer circumference or inner circumference if the + key or = key is pressed.

• To set other modes, refer to “ Structure of Test Mode ”.

• Structure of Servo Mode

Mode : 000

Servo mode

p key

VOLUME +key or –key

” key

Mode : 010

Offset compensation

value displyed

p key

VC offset compensation

p key

FE offset compensation

p key

APC offset compensation

p key

VOLUME +key or – key

p key

Mode : 020

Laser power adjustment

p key

VOLUME +key or – key

Mode : 030

MO playback recording

adjustment

ABCD offset compensation

Laser MO read adjustment

Laser MO write adjustment

(To page 25)

” key

Mode : 011

” key

Mode : 012

” key

Mode : 013

” key

Mode : 014

” key

Mode : 015

All servo ON

” key

Mode : 016

Temperature display

” key

Mode : 021

” key

Mode : 022

” key

2 3 4 5

*1:+ key := key

*2:REC key

VOLUME +key or – key

p key

Low reflection CD playback

VOLUME +key or – key

p key

Mode : 040

adjustment

p key

MO tracking gain adjustment

Low reflection CD EF balance adjustment

Low reflection CD ABCD level adjustment

Laser Low reflection CD read adjustment

Low reflection CD focus gain adjustment

Mode : 032

MO playback EF balance adjustment

Mode : 033

MO playback ABCD level adjustment

Mode : 034

MO recording EF balance adjustment

Mode : 035

MO recording ABCD level adjustment

Mode : 036

Laser MO read adjustment

Mode : 037

MO focus gain adjustment

Mode : 038

Mode : 039

MO focus bias variable

(Cluster Display)

Mode : 041

Low reflection CD focus serch ON

Mode : 042

Mode : 043

Mode : 044

Mode : 045

” key

p key

or – key

VOLUME +key

2 3 4 5

Mode : 031

MO focus search ON

6 7 8 9

(To page 25) (To page 25) (To page 25)

” key

– 24 –

6 7 8 9

VOLUME +key or – key

p key

CD playback adjustment

*1:+ key := key

VOLUME +key or – keyVOLUME +key or – key

p key

Mode : 050

p key

Mode : 060

Full REC

CD tracking gain adjustment

Mode : 046

Low reflection CD tracking

gain adjustment

Mode : 047

Low reflection CD focus bias variable

(Cluster Display)

Mode : 051

CD focus search ON

Mode : 052

CD EF balance adjustment

Mode : 053

CD ABC level adjustment

Mode : 054

Laser CD read adjustment

Mode : 055

CD focus gain adjustment

Mode : 056

Mode : 057

CD focus bias adjustment

(Cluster Display)

” key

• Adjusting Method Note : There is basically no display for individual adjustment items.

1. When the adjustment modes are set according to “Structure of Servo Mode”, the last two digits of the mode number and the adjustment value written in the EEPROM will be displayed blinking.

2. When the P key is pressed, the following will be displayed and adjustments will be performed automatically.

Note : The adjustment value can be changed as desired using the

3. After the adjustments are completed, the item is displayed again and the adjustment value that was blinking lights up.

• Cluster Display

• Nothing is performed at mode numbers 070 to 073.

Only such upper position titles as SER VO, AUDIO, etc. (100s position) are displayed.

Mode No. (Last 2 digits)

52 09

Mode No. (Last 2 digits)

52 09

AUTO_ADJ

Adjustment value (Blinks) Display of item

Adjustment value (Blinks) Automatic adjustment being performed

VOLUME + and – keys, but try to avoid this as much as possible.

Mode No. (Last 2 digits)

52 08

Mode No. (Last 2 digits)

52 09

026 4B 01

Cluster value

Adjustment value (Lights) Display of item

Adjustment value (Blinks) BLOCK error rate

AT error rate

*2:REC key

(To page 24)

p key

Mode : 061

32 cluster full REC

(Cluster Display)

” key

Mode : 062 REC shock

(Cluster Display)

” key

Mode : 063

32 cluster PLAY

(Cluster Display)

” key

– 25 –

[Audio Mode]

23

VOLUME +key or – keyVOLUME +key or – key

p key

” key

Mode : 140

Digital AGC Adjustment 2

p key

Mode : 134

MIC GAIN

” key

p key

Mode : 135

MIC ATTACK

” key

p key

Mode : 136

MIC RECOVER

” key

p key

Mode : 137

MIC THD2

” key

p key

Mode : 138

MIC GAIN 2

” key

p key

Mode : 141

LINE UP SR

” key

p key

Mode : 142

LINE DOWN SR

” key

p key

Mode : 143 LINE THD0

” key

p key

Mode : 144 LINE GAIN

” key

p key

Mode : 145

LINE ATTACK

” key

p key

Mode : 146

LINE RECOVER

” key

p key

Mode : 147 LINE THD2

” key

p key

Mode : 148

LINE GAIN2

” key

p key

Mode : 149

LINE RTIME

” key

p key

Mode : 139

MIC RTIME

” key

1 2 3 4 5

6 7 8  9

(To page 27) (To page 27)

• Set the test mode, press the + key, and set the audio mode using the VOLUME + and – keys.

• To set other modes, refer to “Structure of Test Mode”.

• Structuer of Audio Mode

Mode : 100

Audio mode

p key

VOLUME +key or – key

p key

VOLUME +key or – key



” key

Mode : 110

Audio playback test

p key

Mode : 120

Audio recording test

p key

VOLUME +key or – key

p key

Mode : 130

Digital AGC adjustment 1

p key



DEMP Manual recording

REC key REC key

DEMP AGC recording

” key

Mode : 111

L&R 1kHz 0dB

” key

Mode : 112

L 1kHz 0dB R-

” key

Mode : 113

L-

∞

R 1kHz 0dB

” key

Mode : 114

L&R-

∞

” key

Mode : 121

Manual recording

(LINE, MIC)

” key

Mode : 122

(LINE, MIC)

” key

Mode : 123

AGC recording

(LINE, OPT, MIC)

” key

Mode : 124

(LINE, OPT, MIC)

” key

Mode : 131

MIC UP SR

” key

Mode : 132

MIC DOWN SR

” key

Mode : 133 MIC THDO

” key



∞

– 26 –

6 7 8  9

” key

p key

” key

Mode : 200

Mecha Mode

Mode : 210

Mechanism check

Mode : 211

EJECT prohibited

p key

” key

Mode : 212

Magnetic head ON

” key

[Mecha Mode]

• Set the test mode, press the + key, and set the mecha mode using the VOLUME + and – keys.

• To set other modes, refer to “Structure of Test Mode”.

p key

Mode : 150

Digital AGC Adjustment 3

p key

AUTO LMT UP SR

p key

AUTO LMT DOWN SR

p key

MANU LMT UP SR

p key

MANU LMT DOWN SR

p key

” key

Mode : 151

MAN UP SR

” key

Mode : 152

MAN DOWN SR

” key

Mode : 153

AUT O THD3

” key

Mode : 154

” key

Mode : 155

” key

Mode : 156 MAN THD3

” key

Mode : 157

” key

Mode : 158

” key

Mode : 159

THD1

” key

• When the P key is pressed at mode numbers 100, 110 to 114, the buzzer will sound.

• When the VOLUME keys + and – are pressed at mode numbers 111 to 113, 123, 124, the volume of the headphone output will increase/decrease.

When the = key or + key is pressed, the volume of the head-

phone output will become maximum/minimum.

• When the VOLUME keys + and – are pressed at mode numbers 121 or 122, the recording level will increase/decrease.

When the = key or + key is pressed, the recording level will

become maximum/minimum.

• At mode numbers 121 to 124, the recording LED will light up.

• At mode numbers 121 to 124, the microprocessor will detect the port and automatically determine the input.

• Structure of Mecha Mode

• At mode numbers 200, 210 to 212, the optical pick up can be moved to the outer circumference or inner circumference using the = or + key.

[Power supply Mode]

• Set the test mode, press the + key, and set the power supply mode using the VOLUME + and – keys.

• To set other modes, refer to “Structure of Test Mode”.

• Structure of Power Supply Mode

Mode : 300

Power supply mode

p key

” key

Mode : 310

Power supply

discrimination test

” key (Automatic discrimination)

p key

VOLUME +key or – key

p key

Mode : 311

Ni MH

Mode : 312

AM3 ✕ 2

Mode : 313

DC IN

Mode : 314

EXT BATT

” key

– 27 –

p key

Mode : 320

Charge test

” key

Mode : 321

Main Charge

p key

[General Adjustment Mode]

• Set the test mode, press the = key, and set the general adjust- ment mode.

• To set other modes, cut of f the power once and power on again.

• When the general adjustment mode is set, the LCD display will be as follows.

4000

Assy MODE

• Structure of General Adjustment Mode

General

adjustment mode

” key (CD, MO discrimination)

CD automatic

adjustment

p key

” key

p key

• MO Automatic Adjustment

No. Mode No. Adjustment

1 032 MO playback EF balance adjustment 2 033 MO playback ABCD level adjustment 3 034 MO recording EF balance adjustment 4 035 MO recording ABCD level adjustment 5 037 MO focus gain adjustment 6 038 MO tracking gain adjustment 7 061 32 cluster full REC 8 062 REC shock

9 063 32 cluster PLAY 10 039 MO focus bias adjustment 11 042 Low reflection CD EF balance adjustment 12 043 Low reflection CD ABCD level adjustment 13 045 Laser low reflection CD read adjustment 14 046 Low reflection CD tracking gain adjustment

MO automatic

adjustment

p key

Reset

” key

p key

Adjusting Method :

1. Set the test mode, press the = key to set the general adjustment mode.

2. Load the CD test disc (TDYS-1) or SONY MO disc available on the market.

3. When the ” key is pressed, the disc is determined if CD or MO, the automatic adjustment modes are set, and adjustments are performed automatically in the following order.

• CD Automatic Adjustment

No. Mode No. Adjustment

1 052 CD EF balance adjustment 2 053 CD ABCD level adjustment 3 055 CD focus gain adjustment 4 056 CD tracking gain adjustment 5 057 CD focus bias adjustment

* Display during MO automatic adjustment

Mode No. during adjustment

MO RUN

4. If the automatic adjustment results are OK, the following will be displayed.

CD mode OK

5. If the automatic adjustment results are NG, the following will be displayed.

NG mode No. (Last 2 digits)

55 7F

Adjustment results

CD mode NG

* When the mode number is 039, 057 and the focus bias value is

NG, the following will be displayed.

Mode No. (Last 2 digits)

57 30

Focus bias value

CD mode NG

77 : focus bias

Displayed while the P key is pressed

* Display during CD automatic adjustment

Mode No. during adjustment

CD RUN

– 28 –

77 01

CD mode NG

Error code (01 to 04)

SECTION 5

ELECTRICAL ADJUSTMENTS

* When the mode number is 039, 061 and the AT error rate is NG,

the following will be displayed.

Mode No. (Last 2 digits)

39 03

AT error value

CD mode NG

* When NG, set the servo mode and perform the automatic adjust-

ment of the NG item. (Refer to “Servo Mode”)

5-1. Precautions for Laser Diode Emission Check

When checking the emission of the laser diode during adjustments, never view directly downwards as this may lead to blindness.

5-2. Precautions for Using Optical Pickup (KMS–250A/J2N)

As the laser diode inside the optical pickup damages by static electricity easily, solder the laser tap of the flexible board when handling. Also take the necessary measures to prevent damages by static electricity. Handle the flexible board with care as it breaks easily

Laser tap

Optical Pickup flexible board

5-3. Precautions for Adjustment

1) Perform all adjustments in the order given in the test mode. After adjusting, exit the test mode.

2) Use the following tools and measuring instruments.

• CD test disc TDYS-1 (Parts Code : 4-963-646-01)

• Recorded MO disc PTDM-1 (Parts Code : J-2501-054-A)

• Laser power meter LPM-1 (Parts Code : J-2501-046-A)

• Oscilloscope (Frequency band above 40MHz. Perform the cali-

bration of probe first before measuring.)

• Digital voltmeter

3) Unless specified othewise, supply DC 6V from the DC IN 6V jack.

4) Swtich, knob positions

Hold switch...................... OFF

AVLS switch.................... OFF

– 29 –

5-4. Laser Power Check

Connection :

Optical pickup objective lens

Laser power meter

5-5. MO Traverse Adjustment

Connection :

Oscilloscop

MAIN board

TP5980 (TE) AP5430 (VC)

Digital voltmete

MAIN board

AP5022 (VCC) AP574 (LDIO)

Adjusting Method :

1. Set the servo mode of the test mode (Mode : 000).

2. Press the ” key, and set the laser power adjustment mode (Mode : 020) using the volume + and – keys.

3. Press the = key and move the optical pickup to the inner most circumference.

4. Open the cover and set the laser power meter on the objective lens of the optical pickup.

5. Press the ” key, and set the laser MO read adjustment mode (Mode : 021).

6. Check that the laser power meter reading is 0.85 ±0.085mW.

7. Check that the voltage between AP5022 (VCC) and AP574 (LDIO) at this time is below 44mV.

8. Press the ”key, and set the laser MO write adjustment mode (Mode : 022).

9. Check that the laser power meter reading is 6.8 ±0.68mW.

10.Press the P key to finalize the adjustment data.

11.Check that the voltage between AP5022 (VCC) and AP574 (LDIO) at this time is below 88mV.

12.Press the p key.

13.Exit the test mode.

Adjusting Method :

1. Set the servo mode of the test mode (Mode : 000).

2. Press the ” key, and set the MO playback adjustment mode (Mode : 030) using the volume + and – keys.

3. Press the = and + keys and move the optical pickup to the center circumference.

4. Load any MO disc available on the market.

5. When the ” key is pressed, the MO playback EF balance adjust- ment mode (Mode : 032) will be set after focus search ON (Mode : 031).

6. Press the P key to perform automatic adjustment, and check that the traverse waveform is symmetrical at the top and bottom.

7. Slide the recording key and set the MO recording EF balance adjustment mode (Mode : 034).

8. Press the P key to perform automatic adjustment, and check that the traverse waveform is symmetrical at the top and bottom.

(Traverse Waveform)

Specification : A = B, C 1.0 Vp-p

9. Check that the traverse level at this time is above 1.0Vp-p.

10.Press the p key.

11.Exit the test mode.

Note : Using a recorded disc in this adjustment will erase the data.

– 30 –

+ 108 hidden pages