Sony MZN-710 Service manual

MZ-N710

SERVICE MANUAL

Ver 1.3 2003. 09

US and foreign patents licensed from Dolby Laboratories.

• SonicStage, OpenMG and the OpenMG

logo, MagicGate, Memory Stick and the MagicGate Memory Stick logo, Memory Stick and the Memory Stick logo, Net MD and the Net MD logo are trademarks of Sony Corporation.

• Microsoft, Windows, Windows NT and

Windows Media are trademarks or registered trademarks of Microsoft Corporation in the United States and /or other countries.

• IBM and PC/AT are registered

trademarks of International Business Machines Corporation.

• Macintosh is a trademark of Apple

Computer, Inc. in the United States and/ or other countries.

• MMX and Pentium are trademarks or

registered trademarks of Intel Corporation.

AEP Model

UK Model

E Model

Australian Model

Chinese Model

Tourist Model

Model Name Using Similar Mechanism MZ-R410 Mechanism Type MT-MZN710-177 Optical Pick-up Name LCX-5R

SPECIFICATIONS

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs Wav el ength: = 790 nm Emission duration: continuous Laser output: less than 44.6 µW (This output is the value measured at a distance of 200 mm from the lens surface on the optical pick-up block with 7 mm aperture.)

Recording and playback time (when using MDW-80)

Maximum 160 min. in monaural Maximum 320 min. in LP4 stereo

Revolutions

380 rpm to 2,700 rpm (CLV)

Error correction

ACIRC (Advanced Cross Interleave Reed Solomon Code)

Sampling frequency

44.1 kHz

Sampling rate converter

Input: 32 kHz/44.1 kHz/48 kHz

Coding

ATRAC ( A daptive TRansform Acoustic Coding) AT RA C 3 — LP2/LP4

9-874-278-04 Sony Corporation

2003I16-1 Personal Audio Company

C 2003.9 Published by Sony Engineering Corporation

– Continued on next page –

PORTABLE MINIDISC RECORDER

MZ-N710

Ver 1.1 2003.02

Modulation system

EFM (Eight to Fourteen Modulation)

Frequency response

20 to 20,000 Hz ± 3 dB

Inputs

MIC: stereo mini-jack (minimum input level 0.12 mV) Line in:

stereo mini-jack for analog input (minimum input level 49 mV) optical (digital) mini-jack for optical (digital) input

Outputs

i: stereo mini-jack

Maximum output level

1.2 mW + 1.2 mW; load impedance 16 Ω ( European models) 5 mW + 5 mW; load impedance 16 Ω ( Other models)

Power requirements

Sony AC Power Adaptor connected at the DC IN 3V jack: 120 V AC, 60 Hz (Models for Taiwan) 230 V AC, 50/60 Hz (Models for continental Europe, Singapore and Thailand) 240 V AC, 50 Hz (Model for Australia) 220 V AC, 50 Hz (Model for China) 230 - 240 V AC, 50 Hz (Models for U.K. and Hong Kong) 220 V AC, 50 Hz (Model for Argentine) 100 - 240 V AC, 50/60 Hz (Other models)

The recorder:

Nickel metal hydride rechargeable battery NH-10WM 1.2V 900 mAh (MIN) Ni-MH LR6 (size AA) alkaline battery

Battery charging stand:

AC power a daptor DC 3V

Dimensions

Approx. 81.0 × 74.4 × 20.0 mm (w/h/d)

/4 × 3 × 13/16 in.)

Mas

Approx. 108 g (3.8 oz) the recorder only

The LINE IN (OPTICAL) jack is used to

connect either a digital (optical) cable or a line (analog) cable.

The i jack connects either headphones/

earphones or a line cable.

Measured in accordance with JEITA.

US and foreign patents licensed from Dolby Laboratories.

Design and specifications are subject to change without notice.

Supplied accessories

AC power adaptor (1) Battery charging stand (1)

NH-10WM Nickel metal hydride rechargeable battery (1) Headphones/earphones with

a remote control (1) Dedicated USB cable (1) Dry battery case (1) Battery carrying case (1) Optical cable (1) CD-ROM (SonicStage Ver. 1.5) (1)* Carrying pouch or carrying case with a belt clip (1)

∗Do

not play a CD-ROM on an audio CD play Design and apecifications are subject to change without notice.

Mexico,

and

Battery life

The battery life may be shorter due to operating conditions, the temperature of the location, or alkaline dry battery you use.

When recording

When playing

When to replace the batteries

When the dry battery or rechargeable battery is weak, flashing r or “LOW BATT” appears in the di splay. Replace the dry battery or charge the rechargeable battery. The battery level indicator is approximate. It may be more or less than the indication depending on the operating condition.

Note

Stop the recorder before replacing battery.

(Unit: approx.hours)(JEITA1))

Batteries SP

Nickel metal hydride rechargeable

battery LR6 Sony

alkaline dry

battery Nickel metal

hydride rechargeable battery + One LR6

Measured in accordance with the JEITA (Japan Electronics and Information Technology Industries Association) standard. When using a 100% fully charged nickel metal hydride rechargeable battery (NH-10WM). When using a Sony LR6 (SG) “STAMINA” alkaline dry battery (produced in Japan).

LP2

Stereo

7.5 9.5 13

12.5 16 19

26 34 41

LP4 Stereo

(Unit: approx.hours)(JEITA)

Batteries SP

Nickel metal hydride rechargeable battery

LR6 Sony alkaline dry battery

Nickel metal hydride rechargeable battery + One LR6

LP2

Stereo

19.5 23 27

42 48 56

63 70 85

LP4 Stereo

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 PARTS WHOSE PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

MZ-N710

CAUTION

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

On power sources

• Use house current, nickel metal hydride

rechargeable battery, LR6 (size AA) battery, or car battery.

•

For use in your house: For the supplied battery charging stand, use the AC power adaptor supplied with this recorder. Do not use any other AC power adaptor since it may cause the recorder to malfunction.

Polarity of the plug

• Connect the AC power adaptor to an easily

accessible AC outlet. Should you notice an abnormality in the AC power adaptor, disconnect it from the AC outlet immediately.

• The recorder is not disconnected from the AC

power source (mains) as long as it is connected to the wall outlet, even if the recorder itself has been turned off.

• If you are not going to use this recorder for a

long time, be sure to disconnect the power supply (AC power adaptor, dry battery, rechargeable battery, or car battery cord). To remove the AC power adaptor from the wall outlet, grasp the adaptor plug itself; never pull the cord.

Notes 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.

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.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

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

2. GENERAL ................................................................... 5

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 6

3-2. Case (Lower) ................................................................... 7

3-3. MAIN Board, Battery Case ............................................ 7

3-4. Panel (Upper) Section ..................................................... 8

3-5. LCD Module, Panel Upper Block .................................. 8

3-6. Mechanism Deck (MT-MZN710-177) ........................... 9

3-7. OP Service Assy (LCX-5R) ............................................ 10

3-8. Holder Assy ..................................................................... 11

3-9. DC Motor (Sled) (M602) ................................................ 11

3-10. DC Motor (Over Write Head Up/Down) (M603),

DC SSM18B Motor (Spindle) (M601) ........................... 12

4. TEST MODE .............................................................. 13

5. ELECTRICAL ADJUSTMENTS ......................... 18

6. DIAGRAMS

6-1. Block Diagram ................................................................ 37

6-2. Note for Printed Wiring Board and

Schematic Diagrams ....................................................... 38

6-3. Printed Wiring Board

– MAIN Board (Side A) – ............................................. 39

6-4. Printed Wiring Board

– MAIN Board (Side B) – ............................................. 40

6-5. Schematic Diagram – MAIN Board (1/4) – .................. 41

6-6. Schematic Diagram – MAIN Board (2/4) – .................. 42

6-7. Schematic Diagram – MAIN Board (3/4) – .................. 43

6-8. Schematic Diagram – MAIN Board (4/4) – .................. 44

6-9. IC Pin Function Description ........................................... 50

7. EXPLODED VIEWS

7-1. Case Section .................................................................... 56

7-2. Chassis Section ............................................................... 57

7-3. MAIN Board Section ...................................................... 58

7-4. Mechanism Deck Section-1 (MT-MZN710-177)........... 59

7-5. Mechanism Deck Section-2 (MT-MZN710-177)........... 60

8. ELECTRICAL PARTS LIST ............................... 61

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 ˚C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 ˚C . Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

MZ-N710

Ver 1.2 2003.06

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

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-5R)

The laser diode in the optical pick-up block may suffer electrostatic break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform measures against electrostatic break-down sufficiently before the operation. The flexible board is easily damaged and should be handled with care.

OPTICAL PICK-UP FLEXIBLE BOARD

• In performing the repair with the power supplied to the set, removing the MAIN board causes the set to be disabled. In such a case, fix a convex part of the open/close detect switch (S803 on MAIN board). Handle the FLEXIBLE board (over write head) with care, as it has been soldered directly to the MAIN board. In repairing the component side of MAIN board, connect the FLEXIBLE board (over write head) and the MAIN board with the lead wires in advance.

FLEXIBLE board (over write head)

upper panel ass

laser-tap

S803

MAIN board

•This set requires the patch data in the nonvolatile memory (IC851) to be rewritten using the application, when the MAIN board was replaced. (See page 28)

System requirements

The following hardware and software are required in order to use the SonicStage software for the Net MD.

Computer IBM PC/AT or Compatible

CPU: Pentium II 400 MHz or higher (Pentium III 450 MHz or higher is recommended.) Hard disk drive space RAM: 64 MB or higher (128 MB or higher is recommended)

Others

CD-ROM drive (capable of digital playback by WDM) Sound Board USB port (supports USB 2.0 Full Speed (previously USB 1.1))

Operating System

Display High Color (16bit) or greater, 800 ⋅ 480 dots or more (800 ⋅ 600 dots

Others Internet access: for Web registration and EMD services

Note on hard disk drive space

120 MB or more free space on the hard disk drive is required. If your computer does not have enough space, the software will not be properly installed. The required free space differs according to the version of your Windows OS, or the amount of audio files that you handle.

This software is not supported by the following environments:

• Macintosh

• Windows XP versions other than Home Edition or Professional

• Windows 2000 versions other than Professional

• Windows 98 versions other than Second Edition

• Windows NT

• Windows 95

• Personally constructed PCs or operating systems

• An environment that is an upgrade of the original manufacturer-installed operating system

• Multi-boot environment

• Multi-monitor environment

Notes

• We do not ensure trouble-free operation on all computers that satisfy the system requirements.

• We do not ensure trouble-free operation of the system suspend, sleep, or hibernation function on all

computers.

Factory installed: Windows XP Home Edition/Windows XP Professional/Windows Millennium Edition/Windows 2000 Professional/Windows 98 Second Edition

or more is recommended)

Windows Media Player (version 7.0 or higher) installed for playing WMA files

: 120 MB or more

Looking at controls

SECTION 2

GENERAL

MZ-N710

This section is extracted from instruction manual.

The recorder

7 8

A x • CANCEL/CHG button B Display window C Battery compartmen t D GROUP button E REC (record) switch F Terminals for attaching dry battery

case

G Terminals for attaching the battery

charging stand

H DC IN 3V jack I X button J OPEN switch K END SEARCH button L T MARK button M HOLD switch

To prevent the buttons from being accidentally operated when you carry the recorder, use this function.

9 q; qa qs

qd qf

qh qj

qk ql

N Handstrap hole

Use the hole to attach your own strap.

O USB connecting jack P LINE IN (OPTICAL) jack Q MIC (PLUG IN POWER) jack

There is a tactile dot beside the MIC (PLUG IN POWER) jack.

R i (headphones/earp hones) S MENU button T 5-position control key

N* • ENTER . • T > • t

, –

VOL +

* N and VOL + have a tactile dot.

The display window of the recorder

21345678

9q;qa

A : Indication for remaining playing

time of the current track or of the disc

: Indication for remaining

recordable time of the disc

B Time displ ay C Battery indication

Shows approximate battery condition.

D Disc indication

Shows that the disc is rotating for recording, playing or editing an MD.

E SYNC (synchro-recording) indication F REC indication

Lights up while recording. When flashing, the recorder i s in record standby mode.

G LP2 (LP2 stereo), LP4 (LP4 stereo),

MONO (monaural) indication

H Level meter I Character information display

Displays the disc and track names, date, error messages, track numbers, etc.

J Play mode indications

Shows the play mode (s huffle play, program play, repeat play, etc.) of the MD.

K Sound indications

The headphones/earphones with a remote control

C D

A Volume Control (VOL+, –)

Turn to adjust the volume.

B x (stop) button C Jog lever (. • NX/ENT • >)

NX/ENT (to press): play, pause, enter

.(to slide towards): REW > (to slide towards): FF

D Display window E (group) +, –

F Clip

See “Using the clip for the remote control” (page 15).

G HOLD switch

To prevent the buttons from being accidentally operated when you carry the recorder, use this function.

H DISPLAY button I P MODE/ button J SOUND button

H I J

Using the clip for the remote control

The clip can be removed and reatta ched in the opposite direction.

Remove the clip.

Attaching the clip in the opposite direction.

The display window of the remote control

BACDE

G 8

A Disc indication B Track number display C Character information display D Play mode indication

E SOUND indication F Battery level indication G Group indication H Bookmark indication

MZ-N710

• This set can be disassembled in the order shown below.

3-1. Disassembly Flow

SET

SECTION 3

DISASSEMBLY

CASE (LOWER)

MAIN BOARD,

BATTERY CASE

MECHANISM DECK

(MT-MZN710-177)

OP SERVICE ASSY

(LCX-5R)

HOLDER ASSY

In order to remove mechanism deck (MT-MZN710-177) ,

please remove MAIN board and upper panel section.

PANEL (UPPER) SECTION

LCD MODULE,

PANEL UPPER BLOCK

DC MOTOR

(SLED) (M602)

DC MOTOR (OVER WRITE HEAD UP/DOWN) (M603), DC SSM18B MOTOR (SPINDLE) (M601)

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

3-2. Case (Lower)

two screws (M1.4)

MZ-N710

two screws (M1.4)

Open the battery case lid.

Remove the battery case lid.

3-3. MAIN Board, Battery Case

Remove the solder of terminal (plus).

screw (M1.4)

battery terminal (+) assy

claw

Remove the solder of terminal (minus).

battery terminal

board (–)

battery lid

Remove the case (lower) in th direction of the arrow.

screw (M1.4)

Remove two solders of the flexible board (over write head).

five screws (M1.4)

main board

battery case

flexible board (optical pick-up) (CN501)

flexible board (motor) (CN701)

flexible board (CN871)

mechanism deck (MT-MZN710-177)

MZ-N710

)

3-4. Panel (Upper) Section

set chassis assy

two screws (M1.4)

flexible board (CN871)

upper panel section

two screws (M1.4)

torsion spring (pop up-L)

Slide the open slider in the direction of the arrow, and open the upper panel section.

3-5. LCD Module, Panel Upper Block

Note: On installation, adjust the position of

both switch and knob (hold), button (t mark).

switch

five screws (1.7 × 2.5)

LCD module

button (play

spring (rec)

upper panel block

button (t mark)

knob (hold)

3-6. Mechanism Deck (MT-MZN710-177)

two step screws (MD)

mechanism deck (MT-MZN710-177)

set chassis assy

MZ-N710

3-7. OP Service Assy (LCX-5R)

washer (0.8-2.5)

screw (M1.4)

rack spring

gear (SA)

screw (M1.4)

thrust detent spring

Pull off lead screw.

OP service assy (LCX-5R)

over write head section

Opening the over write head toward the direction (LCX-5R) toward the direction

Note: Do not open the entire assy forcibly,

, remove the OP service assy

when opening the over write head.

3-8. Holder Assy

Open the holder assy.

convex portion

boss

MZ-N710

holder ass

3-9. DC Motor (Sled) (M602)

two screws (M1.4)

DC motor (sled) (M602)

washer (0.8-2.5)

gear (SA)

boss

Remove six solders of the motor flexible board.

MZ-N710

3-10. DC Motor (Over Write Head Up/Down) (M603), DC SSM18B Motor (Spindle) (M601)

Remove six solders of the motor flexible board.

tapping screw

motor cover

DC motor (over write head up/down) (M603)

Note: Press-fit the gear (HA) up to the position of

the DC motor (over write head up/down) (M603) as shown below.

three tapping screws

gear (HA)

gear (HB)

gear (HA)

3.15 mm

DC motor (over write head up/down) (M603)

DC SSM18B motor (spindle) (M601)

gear (HC)

SECTION 4

---

Microcomputer version display

All off

All lit

Remote commander LCD display

V1.200

006

TEST MODE

MZ-N710

Outline

• This set provides the Overall adjustment mode that allows CD and MO discs to be automatically adjusted when in the test mode. In this overall adjustment mode, the disc is discriminated between CD and MO, and each adjustment is automatically executed in order. If a fault is found, the system displays its location. Also, the manual mode allows each individual adjustment to be automatically adjusted.

• Operation in the test mode is performed with the set. A key having no particular description in the text, indicates a set key.

• For the LCD display, the LCD on the remote commander is shown, but the contents of LCD display on the set are same.

Setting Method of Test Mode

There are three different methods to set the test mode: 1 Short SL803 (TEST) on the MAIN board with a solder bridge

(connect pin <zx. of IC801 to the ground) and turn on the power.

– MAIN Board (Side B) –

Operation in Setting the Test Mode

• When the test mode becomes active, first the display check mode is selected.

• Other mode can be selected from the display check mode.

• When the test mode is set, the LCD repeats the following dis-

play.

Set LCD display

ing the [GROUP] key press the following order:

t t t t t

.T>

t t t X t X

3 In the normal mode, turn on the [HOLD] switch on the set.

While pressing the x CANCEL/CHG key on the set, press the keys on the remote commander with the following order:

N > t N > t . t . t N > t . t N > t . t t

2 In the normal mode, turn on the [HOLD] switch. While press-

Note: If electrical adjustment (CD and MO overall adjustment) has not

been finished completely, “NV Error” is displayed on LCDs of the set and the remote commander.

SL803

(TEST)

All lit

All off

Microcomputer version display

• When the

Ver 1.200

X key is pressed and hold down, the display at that

time is held so that display can be checked.

Releasing the Test Mode

For test mode set with the method 1: Turn off the power and open the solder bridge on SL803 (TEST) on the MAIN board.

Note: Remove the solders completely. Remaining could be shorted with

the chassis, etc.

For test mode set with the method 2 or 3: Turn off the power.

MZ-N710

xCANCEL/CHG

key

xCANCEL/CHG

key

[VOL +]

key: 100th place of item

number increase.

[VOL --]

key: 100th place of item

number decrease.

[Major item switching]

[VOL +]

key: 10th place of item

number increase.

[VOL --]

key: 10th place of item

number decrease.

[VOL +]

key: Increases the adjusted

value of the 1st digit

[VOL --]

key: Decreases the adjusted

value of the 1st digit

[Medium item switching]

key

[Minor item switching]

[Adjusted value variation]

key on the set or

key on the remote commander : When adjusted value is

changed: Adjusted value is written. When adjusted value is not changed: That item is adjusted automatically.

[Adjusted value write]

key:Unit place of item number

increase.

key:Unit place of item number

decrease.

[P MODE]

key of

the remote commander: Increase the adjusted value of the 2nd digit

[SOUND]

key of the remote commander:

Decrease the adjusted value of the 2nd digit

key

Configuration of Test Mode

[Test Mode $Display Check Mode%]

Press the

xCANCEL/CHG

Press the

xCANCEL/CHG

Press the or press the

Press the

[VOL +]

key

[Manual Mode]

key

[VOL --]

key

[Overall Adjustment Mode]

key

[GROUP]

key

[DISPLAY]

key on the remote commander

[Self-Diagnosis Result Display Mode]

xCANCEL/CHG

key

[Servo Adjustment] [Audio Adjustment] [Power Supply Adjustment]

[OP Alignment Adjustment]

[Electrical Offset Adjustment]

Power Supply Adjustment Auto Item Feed

CD Overall Adjustment/ MO Overall Adjustment

Press the or

ENTER

[REC]

key

[Sound Skip Check Result Display Mode]

Press the

Press the on the remote commander for several seconds (about 3 seconds)

xCANCEL/CHG

[T MARK]

key, or

key

[DISPLAY]

key

[Key Check Mode]

The key check quits, or open the upper panel

Manual Mode

Mode to adjust or check the operation of the set by function. Normally, the adjustment in this mode is not executed. However, the Manual mode is used to clear the memory, power supply adjustment, and laser power check before performing automatic adjustments in the Overall Adjustment mode.

• Transition method in manual mode

1. Set the test mode (see page 13).

2. Press the or[VOL +] key activates the manual mode

where the LCD display as shown below.

Remote commander LCD display

000

Manual

3. During each test, the optical pick-up moves outward or inward while the or key is pressed for several seconds respectively.

4. Each test item is assigned with a 3-digit item number; 100th place is a major item, 10th place is a medium item, and unit place is a minor item. The values adjusted in the test mode are written to the nonvolatile memory (for the items where adjustment was made).

>t.

MZ-N710

5. The display changes a shown below each time the [END

SEARCH] is pressed or the [DISPLAY] key on the remote

commander is pressed.

• Address & Adjusted Value Display

Remote commander LCD display

011

item number

• Jitter Value & Adjusted Value Display

Remote commander LCD display

011

item number

• Block Error Value & Adjusted Value Display

Remote commander LCD display

011

item number

• ADIP Error Value & Adjusted Value Display

Remote commander LCD display

011

item number

• Focus Drive Value & Adjusted Value Display

Remote commander LCD display

011

C68S01

address

OFFJ01

jitter value

063B01

block error

value

059A01

ADIP error

value

015F01

adjusted value

Self-Diagnosis Result Display Mode

This set uses the self-diagnostic function system in which if an error occurred during the recording or playing, the mechanism control block and the power supply control block in the microcomputer detect it and record its cause as history in the nonvolatile memory. By checking this history in the test mode, you can analyze a fault and determine its location. Total recording time is recorded as a guideline of how long the optical pick-up has been used, and by comparing it with the total recording time at the time when an error occurred in the selfdiagnosis result display mode, you can determine when the error occurred. Clear both self-diagnosis history data and total recording time, if the optical pick-up was replaced.

• Self-diagnosis result display mode setting method

1. Set the test mode (see page 13).

2. In the display check mode, press the [GROUP] key or press the [DISPLAY] key on the remote commander activates the self-diagnosis result display mode where the LCD display as shown below.

Remote commander LCD display

0XX

error display code

3. Then, each time the key is pressed, LCD display descends by one as shown below. Also, the LCD display ascends by one when the key is pressed.

1 0000

history code

Total recording time when error occurred

Focus drive

item number

• Item Title Display

Remote commander LCD display

011

item number

However in the power mode (item number 700’s), only the item is displayed.

6. Quit the manual mode, and press the return to the test mode (display check mode).

value

LrefPw

item title

adjusted value

xCANCEL/CHG key to

Overall Adjustment Mode

Mode to adjust the servo automatically in all items. Normally, automatic adjustment is executed in this mode at the repair. For further information, refer to “SECTION 5 ELECTRICAL ADJUSTMENTS” (see page 18).

0XX 1 ****

0XX N ****

0XX N1****

0XX N2****

0XX R_****

: Error code

****

: Total recording time

[GROUP] key is pressed or the [DISPLAY] key on remote

If the commander is pressed with this display, the LCD switches to the simple display mode.

4. Quit the self-diagnosis result display mode, and press the xCANCEL/CHG key to return to the test mode (display check mode).

MZ-N710

• Description of error indication codes

Problem Indication code Meaning of code Simple display Description

No error 00 No error --- No error

Servo system error 02 High temperature Temp High temperature detected

03 Focus error Fcus Disordered focus or can not read an address 04 Spindle error Spdl Abnormal rotation of disc

TOC error

Power supply system error 22 Low battery LBat Momentary interruption detected

Offset system error Offset error

11 TOC error TOC Faulty TOC contents 12 Data reading error Data Data could not be read at SYNC 13 TOC address error Tadr TOC address data error

31 Offset error Ofst Offset error

36 Mirror error Mirr Mirror retry over

Illegal access target address was specified

Focus error ABCD offset error

Tracking error

X1 tracking error Offset error

MD DATA 2 disc error

Adrs Attempt to access an abnormal address

ABCD Focus error ABCD offset error

TE Tracking error Offset error

X1TE X1 tracking error Offset error

MD2 MD DATA 2 disc error

• Description of indication history

History code number Description

1The first error N The last error N1 One error before the last. N2 Two errors before the last. R_ Total recording time

Reset the Error Display Code

After servicing, reset the error display code.

• Setting method of reset the error display code

1. Set the test mode (see page 13).

2. Pressing the [GROUP] key or pressing the [DISPLAY] key on the remote commander activates the self-diagnosis result display mode.

3. To reset the error display code, press the [REC] key or key on the remote commander (twice) when the code is displayed (except “R_****”). (All the data on the 1, N, N1, and N2 will be reset)

MZ-N710

Sound Skip Check Result Display Mode

This set can display the count of errors that occurred during the recording/playing for checking.

• Setting method of sound skip check result display mode

1. Set the test mode (see page 13).

2. Press the key or [REC] key, and the playing or recording

sound skip result display mode becomes active respectively where the LCD displays the following.

Remote commander LCD display

000

3. When the key is pressed, total error count is displayed on

the LCD, and each time the key is pressed, the display item moves down by one as shown below. Also, if the key is pressed, the display item moves up by one, then if the [REC] key is pressed, the display in the record mode appears. When the [REC] key is pressed, total error count is displayed on the LCD, and each time the key is pressed, the display item moves down by one as shown below. Also, if the

key is pressed, the display item moves up by one, then if

the key is pressed, the display in the play mode appears.

Playing sound skip result display

ENTER

P**R**

Total count of play system errors (hex.)

ENTER

Total count of record system errors (hex.)

Recording sound skip result display

Key Check Mode

This set can check if the set and remote commander function normally.

• Setting method of key check mode

1. Set the test mode (see page 13).

2. Pressing the [T MARK] key or [DISPLAY] key on the remote

commander for several seconds (about 3 seconds) activates the key check mode. (At the last two digits, AD value of remote commander key line is displayed in hexadecimal)

Remote commander LCD display

000

: AD value of the remote commander key

(hexadecimal 00 to FF)

3. When each key on the set and on remote commander is pressed, its name is displayed on the remote commander LCD. (The operated position is displayed for 4 seconds after the slide switch is operated. If any other key is pressed during this display, the remote commander LCD switches to its name display)

Example1: When the key on the set is pressed:

Remote commander LCD display

000

: AD value of the remote commander key

FF **

(hexadecimal 00 to FF)

000 P**R**

000 EIB **

000 Stat**

000 Adrs**

000 BEmp**

000 P**R**

000 BOvr**

000 Bful**

000 Rtry**

000 ######

P**R**

: Total play/record errors (hex.)

: Counter of sound skip check each item (hex.)

######

: 6-digit address where sound was skipped last (hex.)

• Cause of sound skip error

Cause of error Description of error

EIB Sound error correction error

Play

Record

4. To quit the sound skip check result display mode and to return to the test mode (display check mode), press the xCANCEL/

CHG key.

Stat Decoder status error

Adrs Address access error

BEmp Buffer is empty

BOvr

Bful

Rtry Retry times over

Buffer is full, and sounds were dumped

Buffer capacity becomes less, and forcible writing occurred

Example2: When the mander is pressed:

Remote commander LCD display

000

: AD value of the remote commander key

4. When all the keys on the set and on the remote commander are considered as OK, the following displays are shown.

Example1: When the keys on the set are considered as OK:

Remote commander LCD display

: AD value of the remote commander key

Example2: When the keys on the remote commander are con-

Remote commander LCD display

: AD value of the remote commander key

5. When all keys were checked or if the upper panel is opened,

the key check mode quits and the test mode (display check mode) comes back.

rP PUS **

(hexadecimal 00 to FF)

888

SET OK **

(hexadecimal 00 to FF)

sidered as OK:

888

RMC OK **

(hexadecimal 00 to FF)

NX/ENT key on the remote com-

MZ-N710

Ver 1.2 2003.06

SECTION 5

ELECTRICAL ADJUSTMENTS

Outline

• In this set, automatic adjustment of CD and MO can be performed by entering the test mode. However, before starting automatic adjustment, the memory clear, power supply adjustment, and laser power check must be performed in the manual mode.

•A key having no particular description in the text, indicates a set key.

•For the LCD display, the LCD on the remote commander is shown, but the contents of LCD display on the set are same.

Precautions for Adjustment

1. Adjustment must be done in the test mode only.

After adjusting, release the test mode.

2. Use the following tools and measuring instruments.

•Test CD disc TDYS-1 (Part No. : 4-963-646-01)

• SONY MO disc available on the market

• Digital voltmeter

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

•Thermometer (using the Temperature Correction)

• Personal computer

• USB cable

3. Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J951).

4. Switch position

HOLD switch ............................................... ON

Adjustment Sequence

1. NV Reset (item number: 021) (EEPROM clear)

2. Temperature Correction (item number: 015)

3. Power Supply Manual Adjustment

4. Laser Power Check

5. Adjustment required before Overall Adjustment

6. CD Overall Adjustment (item number: 031)

Overall Adjustment (item number: 034)

8. RESUME Clear (item number 043)

9. Rewriting the Patch Data (at replacement of the MAIN board)

10. Rewriting the NV values

Note: In the case of the microcomputer version 1.200 or more, the

sequence 5. Adjustment required before Overall Adjustment is unnecessary.

       

Manual Mode

        

 

Overall Mode

  

 

Manual Mode



NV Reset

• Setting Method of NV Reset

1. Select the manual mode of the test mode, and set item number 021 NV Reset (see page 14).

Remote commander LCD display

021 ResNV CC

2. Press the X key.

Remote commander LCD display

021 ResOK?

3. Press the X key once more.

Remote commander LCD display

021

4. Press the xCANCEL/CHG key to quit the manual mode, and

return to the test mode (display check mode).

Res***

NV reset (after several seconds)

Reset!

Temparature Correction

• Adjustment Method of Temperature Correction

1. Select the manual mode of the test mode, and set the item number 015 (see page 14).

Remote commander LCD display

015 SetTmp **

: Adjusted value

2. Measure the ambient temperature.

3. Adjust with [VOL +] or [VOL --] key so that the adjusted value (hexadecimal value) becomes the ambient temperature. (Initial value : 19h = 25˚C, Adjusting range : 80h to 7fh (–128˚C to +127˚C))

Press the Xkey or press the key on the remote commander to write the adjusted value.

Power Supply Manual Adjustment

• Adjustment sequence

Adjustment must be done with the following steps.

1. VC1_LOW (PB) adjustment (item number : 741)

2. VC1_HIGH (REC) adjustment (item number : 742)

3. VC2_LOW adjustment (item number : 743)

4. VC2_HIGH adjustment (item number : 744)

5. REG1 adjustment (item number : 745)

6. REG3_LOW1 adjustment (item number : 747)

7. REG3_LOW2 adjustment (item number : 748)

8. REG3_HIGH adjustment (item number : 749)

9. VREC_LOW (X2 speed) adjustment (item number : 751)

10. VREC_MIDDLE (X4 speed)adjustment (item number : 752)

11. VREC_HIGH (HEAD MOTOR) adjustment (item number : 753)

12. CHGV_LOW adjustment (item number : 755)

13. CHGV_HIGH adjustment (item number : 756)

14. CHGI_LOW (current) adjustment (item number : 757)

15. CHGI_HIGH (current) adjustment (item number : 758)

• Setting Method of Power Supply Manual Adjustment

1. Make sure that the power supply voltage is 3V.

2. Select the manual mode of the test mode (see page 14).

3. Set item number.

Note: Power supply adjustment auto item feed mode (page 23) is

available to perform the temperature Correction and Power Supply Adjustment without entering the manual mode.

MZ-N710

• Adjustment Method of VC1_LOW (PB) (item number: 741)

Remote commander LCD display

741 VC1 L **

: Adjusted value

1. Connect a digital voltmeter to the TP1928 (VCO1) on the MAIN

board, and adjust age down) so that the voltage becomes 2.35 ± 0.05V.

TP1928 (VCO1)

2. Press the

commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

• Adjustment Method of VC1_HIGH (REC) (item number: 742)

Remote commander LCD display

[VOL +] key (voltage up) or [VOL --] key (volt-

digital

voltmete

MAIN board

BATT– (GND)

X key on the set or the key on the remote

(see page 22)

• Adjustment Method of VC2_HIGH (item number: 744)

Remote commander LCD display

744 VC2 Hi **

: Adjusted value

1. Connect a digital voltmeter to the TP1905 (VCOUT) on the

MAIN board, and adjust

] key (voltage down) so that the voltage becomes 2.55 ± 0.01V.

MAIN board

TP1905 (VCOUT)

BATT– (GND)

2. Press the

commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

• Adjustment Method of REG1 (item number: 745)

Remote commander LCD display

X key on the set or the key on the remote

[VOL +] key (voltage up) or [VOL --

digital

voltmete

(see page 22)

742 VC1 H **

: Adjusted value

1. Connect a digital voltmeter to the TP1928 (VCO1) on the

MAIN board, and adjust [VOL +] key (voltage up) or [VOL --] key (voltage down) so that the voltage becomes 2.75 ± 0.05V.

digital

voltmete

MAIN board

TP1928 (VCO1)

BATT– (GND)

2. Press the X key on the set or the key on the remote commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

• Adjustment Method of VC2_LOW

(item number: 743)

Remote commander LCD display

(see page 22)

743 VC2 Lo **

: Adjusted value

1. Connect a digital voltmeter to the TP1905 (VCOUT) on the MAIN board, and adjust

] key (voltage down) so that the voltage becomes 2.30 ± 0.01V.

MAIN board

TP1905 (VCOUT)

BATT– (GND)

[VOL +] key (voltage up) or [VOL --

digital

voltmete

745 REG1 **

: Adjusted value

1. Connect a digital voltmeter to the TP1909 (REGO1) on the

MAIN board, and adjust [VOL +] key (voltage up) or [VOL --

] key (voltage down) so that the voltage becomes 2.05 ± 0.01V.

digital

voltmete

MAIN board

TP1909 (REGO1)

BATT– (GND)

2. Press the X key on the set or the key on the remote commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

• Adjustment Method of REG3_LOW1 (H)

(item number: 747)

Remote commander LCD display

(see page 22)

747 REG3L1 **

: Adjusted value

1. Connect a digital voltmeter to the TP1907 (REGO3) on the MAIN board, and adjust

] key (voltage down) so that the voltage becomes 1.25 ± 0.01V.

MAIN board

TP1907 (REGO3)

BATT– (GND)

[VOL +] key (voltage up) or [VOL --

digital

voltmete

2. Press the X key on the set or the key on the remote commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

(see page 22)

2. Press the X key on the set or the key on the remote commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

(see page 22)

MZ-N710

• Adjustment Method of REG3_LOW2 (item number: 748)

Remote commander LCD display

748 REG3L2 **

: Adjusted value

1. Connect a digital voltmeter to the TP1907 (REGO3) on the

MAIN board, and adjust

] key (voltage down) so that the voltage becomes 1.25 ± 0.01V.

MAIN board

TP1907 (REGO3)

BATT– (GND)

2. Press the

commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

• Adjustment Method of REG3_HIGH (item number: 749)

Remote commander LCD display

X key on the set or the key on the remote

[VOL +] key (voltage up) or [VOL --

digital

voltmete

(see page 22)

• Adjustment Method of VREC_MIDDLE (X4 speed) (item number: 752)

Remote commander LCD display

752 VREC M **

: Adjusted value

1. Connect a digital voltmeter to the TP1620 (VREC) on the

MAIN board, and adjust

] key (voltage down) so that the voltage becomes 1.10 ± 0.02V.

MAIN board

TP1620 (VREC)

BATT– (GND)

2. Press the

commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

• Adjustment Method of VREC_HIGH (HEAD MOTOR) (item number: 753)

Remote commander LCD display

X key on the set or the key on the remote

[VOL +] key (voltage up) or [VOL --

digital

voltmete

(see page 22)

749 REG3 H **

: Adjusted value

1. Connect a digital voltmeter to the TP1907 (REGO3) on the

MAIN board, and adjust [VOL +] key (voltage up) or [VOL --

] key (voltage down) so that the voltage becomes 1.25 ± 0.01V.

digital

voltmete

MAIN board

TP1907 (REGO3)

BATT– (GND)

2. Press the X key on the set or the key on the remote commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

• Adjustment Method of VREC_LOW (X2 speed)

(item number: 751)

Remote commander LCD display

(see page 22)

751 VREC L **

: Adjusted value

1. Connect a digital voltmeter to the TP1620 (VREC) on the MAIN board, and adjust

] key (voltage down) so that the voltage becomes 1.10 ± 0.02V.

MAIN board

TP1620 (VREC)

BATT– (GND)

[VOL +] key (voltage up) or [VOL --

digital

voltmete

753 VREC H **

: Adjusted value

1. Connect a digital voltmeter to the TP1620 (VREC) on the

MAIN board, and adjust [VOL +] key (voltage up) or [VOL --

] key (voltage down) so that the voltage becomes between 1.65V

and 1.75V.

digital

voltmete

MAIN board

TP1620 (VREC)

BATT– (GND)

2. Press the commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

X key on the set or the key on the remote

(see page 22)

2. Press the X key on the set or the key on the remote commander to write the adjusted value.

Adjustment and Connection Location: MAIN board

(see page 22)

+ 46 hidden pages

Sony MZN-710 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. Disassembly Flow

DISASSEMBLY

3-2. Case (Lower)

3-3. MAIN Board, Battery Case

3-4. Panel (Upper) Section

3-5. LCD Module, Panel Upper Block

3-6. Mechanism Deck (MT-MZN710-177)

3-7. OP Service Assy (LCX-5R)

3-8. Holder Assy

3-9. DC Motor (Sled) (M602)

3-10. DC Motor (Over Write Head Up/Down) (M603), DC SSM18B Motor (Spindle) (M601)

TEST MODE

ELECTRICAL ADJUSTMENTS