Sony MZNH-900 Service manual

MZ-NH900

SERVICE MANUAL

Ver 1.1 2004.09

US and foreign patents licensed from Dolby Laboratories.

• SonicStage and SonicStage logo are trademarks or registered trademarks of Sony Corporation.

• MD Simple Burner, OpenMG, “Magic Gate”, “MagicGate Memory Stick”, “Memory Stick”,

Hi-MD, Net MD, ATRAC, ATRAC3, ATRAC3plus and their logos 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.

• All other trademarks and registered trademarks are trademarks or registered trademarks of their

respective holders.

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Chinese Model

Tourist Model

Model Name Using Similar Mechanism NEW MD Mechanism Type MT-MZNH900-181 Optical Pick-up Name ABX-U

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs Wavelength: λ = 790 nm Emission duration: continuous Laser output: less than 44.6 µW (This output is the v alue 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 HMD1G (1GB disc):

Maximum 34 hours in Hi-LP stereo

When using MDW-80 in Hi-MD mode:

Maximum 10 hours and 10 min. in Hi-LP stereo

When using MDW-80 in MD mode:

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

Revolutions

350 rpm to 3,000 rpm (CLV)

Error correction

Hi-MD:

LDC (Long Distance Code)/BIS (Burst Indicator Subcode)

MD:

ACIRC (Advanced Cross Interleave Reed Solomon Code)

SPECIFICATIONS

Sampling frequency

44.1 kHz

Sampling rate converter

Input: 32 kHz/44.1 kHz/48 kHz

Coding

Hi-MD:

ATR AC3plus (Adaptive TRansform Acoustic Coding 3 plus)

MD:

ATR AC ATR AC3 — LP2/LP4

Modulation system

Hi-MD:

1-7RLL (Run Length Limited)/PRML (Partial Response Maximum Likelihood)

MD:

EFM (Eight to Fourteen Modulation)

Frequency response

20 to 20,000 Hz ± 3 dB

Inputs

MIC: stereo mini-jack

(minimum input level 0.13 mV)

Line in:

stereo mini-jack for analog input (minimum input level 49 mV) optical (digital) mini-jac k fo r optic al (digital) input

Outputs

i/LINE OUT2): stereo mini-jack (dedicated remote control jack)/194 mV (10 kΩ)

Maximum output (DC)

Headphones:

3 mW + 3 mW (16 Ω) (European models) 5 mW + 5 mW (16 Ω) (Other models )

Power requirements

Sony AC Power Adaptor connected at the DC IN 3V jack:

120 V AC, 60 Hz (Models for USA, Canada, Mexico and Taiwan) 240 V AC, 50 Hz (Model for Australia) 220 V AC, 50 Hz (Models for China and Argentine) 100 - 240 V AC, 50/60 Hz (Other models)

The recorder:

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

Battery charging stand:

AC power adaptor DC 3V

Operating temperature

+5° C (+4 1°F) to +35° C (+95°F)

Dimensions

Approx. 81.3 × 77.8 × 21.2 mm (w/h/d)

/4 × 31/8 × 27/32 in.) (excluding projecting

(3 parts and controls)

Mass

Approx. 110 g (3.9 oz) (the recorder only) Approx. 133 g (4.7 oz) (including the rechargeable battery)

The LINE IN (OPT) jack is used to connect

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

The i/LINE OUT jack co n nects either

headphones/earphones or a line cable.

Measured in accordance with JEITA.

Supplied accessories

AC power adaptor (1) Battery charging stand (1) Remote control (1) Headphones (for USA model) (1) Earphones (except USA model) (1) Dedicated USB cable (1) NH-10WM Nickel metal hydride rechargeable battery (1) CD-ROM (SonicStage/MD Simple Burner) (1)* Dry battery case (1) Battery carrying case (1) Carrying pouch (except USA model) (1) Optical cable (1) Clamp filter (2) *Do not play a CD-ROM on an audio CD

player.

Design and specific at ions are subject to change without notice.

PORTABLE MINIDISC RECORDER

9-879-121-02

Sony Corporation

Personal Audio Company Published by Sony Engineering Corporation

MZ-NH900

Battery life

When recording continuously in Hi-MD mode

Disc type Batteries Linear PCM Hi-SP Hi-LP

1GB Hi-MD disc

60/74/80-minute standard disc

Measured in accordance with the JEITA (Japan Electronics and Information Tech nology Industries Association) standard.

When using a 100% fully charged nickel metal hydride rech argeable battery

When using a Sony LR6 (size AA) “STAMINA” alkaline dry battery (produced in Japan)

When recording continuously in MD mode

Disc type

60/74/80-minute standard disc

When playing continuously in Hi-MD mode

Disc type Batteries Linear PCM Hi-SP Hi-LP

1GB Hi-MD disc NH-10WM 5 8.5 10

60/74/80-minute standard disc

When playing continuously in MD mode

Disc type

60/74/80-minute standard disc

NH-10WM

LR6

NH-10WM + LR6 6 8.5 10

NH-10WM 3.5 5 6

LR6 4.5 7 8

NH-10WM + LR6 8 12 14

BatteriesSP Stereo LP2 Stereo LP4 Stereo

NH-10WM 5.5 6.5 7.5

LR6 7 8.5 9.5

NH-10WM + LR6 12.5 15 17

LR6 10 16 19

NH-10WM + LR6 15 24.5 29

NH-10WM 5 8.5 11

LR6 9 14.5 19

NH-10WM + LR6 14 23 30

Batteries SP Stereo LP2 Stereo LP4 Stereo

NH-10WM

LR6

NH-10WM + LR6

3.5 5 6

2.5 3.5 4

910.512

18 21 24

27 31.5 36

(Unit: approx.hours)(JEITA1))

(Unit: approx.hours)(JEITA)

CAUTION

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

Notes on chip component replacement

• Never reuse a disconnected chip component.

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

damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of 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.

On power sources

•

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

Polarity of the plug

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 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 MARQ UE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU D ANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

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

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

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 7

3-2. Case (Lower) Block......................................................... 8

3-3. MAIN Board.................................................................... 8

3-4. Upper Panel Block........................................................... 9

3-5. Mechanism Deck (MT-MZNH900-181) ......................... 9

3-6. Battery Case Block .......................................................... 10

3-7. Gear (BSA), Gear (SB) ................................................... 10

3-8. OP Service Assy .............................................................. 11

3-9. DC Motor SSM18D/C-NP (Spindle) (M701),

DC Motor (Sled) (M702),

DC Motor Unit (Over Write Head Up/Down) (M703) ... 11

3-10. Holder Assy ..................................................................... 12

3-11. Position of Ferrite Core ................................................... 12

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

MZ-NH900

5. ELECTRICAL ADJUSTMENTS ......................... 17

6. DIAGRAMS

6-1. Block Diagram –MD SERVO Section – ......................... 23

6-2. Block Diagram –AUDIO Section –................................. 24

6-3. Block Diagram –POWER SUPPLY Section – ................ 25

6-4. Schematic Diagram –MAIN Section (1/9) – ................... 27

6-5. Schematic Diagram –MAIN Section (2/9) – ................... 28

6-6. Schematic Diagram –MAIN Section (3/9) – ................... 29

6-7. Schematic Diagram –MAIN Section (4/9) – ................... 30

6-8. Schematic Diagram –MAIN Section (5/9) – ................... 31

6-9. Schematic Diagram –MAIN Section (6/9) – ................... 32

6-10. Schematic Diagram –MAIN Section (7/9) – ................... 33

6-11. Schematic Diagram –MAIN Section (8/9) – ................... 34

6-12. Schematic Diagram –MAIN Section (9/9) – ................... 35

6-13. Printed Wiring Board –MAIN Section (1/2) – ................ 36

6-14. Printed Wiring Board –MAIN Section (2/2) – ................ 37

7. EXPLODED VIEWS

7-1. Case Section .................................................................... 49

7-2. Upper Panel Section ........................................................ 50

7-3. Chassis Section................................................................ 51

7-4. Mechanism Deck Section (MT-MZNH900-181) ............ 52

6. ELECTRICAL PARTS LIST................................ 53

MZ-NH900

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

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

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)

: 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 viscou-s (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.

Providing the required system environment

System requirements

The following system environment is required in order to use the SonicStage/MD Simple Burner software for the MD Walkman.

Computer IBM PC/AT or Compatible

Operating System

Display High Color (16bit) or higher, 800 × 600 dots or better (1024 × 76 8 do ts

Others • Internet access: for Web registration, EMD services and CDDB

This software is not supported by the following environments:

•OSs other than the indicated above

•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

•Macintosh

Notes

•We do not ensure trouble-free ope ration on all computers that satisfy the sy stem requirements.

•The NTFS format of Windows XP/Windows 2000 Professional can be used only with the standard

(factory) settings.

•We do not ensure trouble-free operation of the system suspend, sleep, or hibernation func tion on all computers.

•For Windows 2000 Professional users, in sta ll Serv ic e Pack 3 or later version befo re usi ng the software.

• CPU: Pentium II 400 MHz or higher (Pentium III 450 MHz or higher is recommended.)

• Hard disk drive space: 200 MB or more (1.5 GB or more is recommended) (The am ount space will vary accord in g to Windows version and the number of music files st ored on the hard disk.)

• RAM: 64 MB or more (128 MB or more is recommended)

Others

• CD drive (capable of digital playback by WDM)

• Sound Board

• USB port (supports USB (previously USB 1.1))

Factory in st alled: Windows XP Media Center Edition 20 04 /Windows XP Media Cent er Edition/Windows XP Professional/Windows XP Home Edition/ Windows 2000 Professional/Windows Millennium Edi ti o n/ Windows 98 Second Edition

or better is recommended)

• Window s Media Player (version 7.0 or higher) installed for playing WMA files

OPERATION CHECK WHEN THE LID IS OPEN

In making an operation check with the MAIN Board removed from the set, short the SL894 (OPEN/CLOSE) of the MAIN Board with the solder before starting the operation check.

Note: Be sure to remove the solder used for shortcircuit after the repaire

completed.

– MAIN Board (Conductor Side) –

SL894

(OPEN/CLOSE)

Looking at controls

123456

The recorder

SECTION 2

GENERAL

MZ-NH900

This section is extracted from instruction manual.

A •NAVI/ MENU button

Press lightly to go to the NAVI (navigation) setting mode. Press for 2 seconds or more to go to MENU setting mode.

B Battery compartment C Jog dial

D 5-way control key

5 6 7

Operation Function

Press NENT Press towards . find th e beginning

Press towards > find th e beginning

Press towards

VOL + VOL –.

There are tactile dots beside the

ENT and

E Terminals for attaching dry battery

case

F Terminal for attaching the battery

charging stand

G DC IN 3V jack H X (pause) button I x (stop) • CANCEL/CHG button

play, enter

of the previous track, rewind

of the next track, fast forward

volume

VOL +

buttons.

q; qa

qh qj

J GROUP button K zREC (record) switch L OPEN switch M Display window N T MARK button O USB cable connecting jack P LINE IN (OPT) jack Q MIC (PLUG IN POWER) jack

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

R HOLD switch

Slide th e switch in the dir ec tio n o f the arrow to disa ble the buttons on the recorder. To prevent the buttons from being accide nt al ly op er at ed when you carry the recorder, use this function .

S i (headphones/earphones)/LINE

OUT jack

The display window of the recorder

A Character information display

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

B SYNC (synch ro-r ec or di ng) i nd icat i on C Hi-MD/MD indication

“Hi-MD” lights up when the operation mode of the recorder is in Hi-MD mode and “MD” lights up when the operation mode is in MD mode.

D REC indication

Lights up during recording or file transfers from the computer. When flashing, the recorder is in record standby mode.

E Battery indication

Shows the approximate remaining battery power. If the batteries are weak, the indication becomes empty and starts flashing.

F Disc indication

Shows that the disc is rotating for recording or pl aying.

78 9

G Track mode (PCM, Hi-SP, Hi-LP, SP,

LP2, LP4, MONO) indication

H Sub play mode/Repeat play

indications Shows the selected Sub play mode (single-track play, shuffle play, etc.) or Repeat play.

I Main play mode indications

Shows the selected main play mode (group play, program play, etc.).

MZ-NH900

12 3 4765

The headphones/earphones with a remote control

C D

H I J

F Clip

See “Using the clip for the remote control”.

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

A Volume Control (VOL +, –)

Turn to adjust the volume.

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

Operation Function

Press

/ENT play, pause, enter

Press towards

find the beginning of the previous track, rewind

find the beginning of the next track, fast forward

Using the clip for the remote control

It may be hard for you to read the indications in the display if the remote control is attached upside down with the clip in its current position. In this case, attach the clip in the opposite direction as shown below.

1Remove the clip. 2 Attach the clip in the opposite direction.

D Display window E (group) +, –

The display window of the remote control

A Disc indication B Track nu mbe r dis play C Character information display D Sub pl ay mode/R epeat play

E SND (sound) and SU R (surround)

indications

F Battery level indication G Main play mode indications

indications

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

3-1. DISASSEMBLY FLOW

Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed.

SET

3-2. CASE (LOWER) BLOCK

(Page 8)

MZ-NH900

SECTION 3

DISASSEMBLY

3-3. MAIN BOARD

(Page 8)

3-5. MECHANISM DECK (MT-MZNH900-181)

(Page 9)

3-7. GEAR (BSA), GEAR (SB)

(Page 10)

3-8. OP SERVICE ASSY

(Page 11)

3-9. DC MOTOR SSM18D/C-NP (SPINDLE) (M701),

DC MOTOR (SLED) (M702), DC MOTOR UNIT (OVER WRITE HEAD UP/DOWN) (M703) (Page 11)

3-4. UPPER PANEL BLOCK

(Page 9)

3-6. BATTERY CASE BLOCK

(Page 10)

3-10. HOLDER ASSY

(Page 12)

MZ-NH900

)

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

3-2. CASE (LOWER) BLOCK

case (lower) block

two screws (M1.4)

screw (M1.4

3-3. MAIN BOARD

Open the battery lid in the direction of arrow.

battery lid

flexible board (CN471)

Remove two solders.

MAIN board

flexible board

flexible board (CN701)

two toothed lock screws (M1.4)

Remove the solder.

flexible board (CN501)

three toothed lock screw (M1.4)

3-4. UPPER PANEL BLOCK

two screws

(M1.4)

upper panel block

flexible board (CN471)

two screw (M1.4)

MZ-NH900

3-5. MECHANISM DECK

(MT-MZNH900-181)

Slide the open slider in the direction of arrow A, and open the upper panel sub assy in the direction of arrow

mechanism deck (MT-MZNH900-181)

two step screws (MD)

MZ-NH900

3-6. BATTERY CASE BLOCK

two screws

× 2.5

(1.7

)

claw

MD standard pin

tension spring (lock)

3-7. GEAR (BSA), GEAR (SB)

gear (SB)

open slider

self tap screw

battery case bloc

screw (M1.4)

thrust retainer spring

washer (0.8-2.5)

gear (BSA)

3-8. OP SERVICE ASSY

Lead screw block assy is turned and it removes from OP service assy.

OP service assy

MZ-NH900

3-9. DC MO TOR SSM18D/C-NP (SPINDLE) (M701), DC MOTOR (SLED) (M702),

DC MOTOR UNIT (OVER WRITE HEAD UP/DOWN) (M703)

two screws (M1.4)

DC motor (sled)

Remove two solders of flexible board.

self tap screw

DC motor unit (over write head up/down) (M703)

(M702)

Remove four solders of flexible board.

three self tap screws

DC motor SSM18D/C-NP (spindle) (M701)

motor base assy

MZ-NH900

)

3-10. HOLDER ASSY

Remove the holder assy to the direction of the arrow

Open the holder assy.

boss

3-11. POSITION OF FERRITE CORE

-REMOTE COMMANDER-

A cable is rolled once.

-AC ADAPTOR-

A cable is rolled twice.

20mm

-USB CABLEA cable is rolled once.

A cable is not rolled.

USB mini B

clamp filter (ferrite core) (Part No. 1-543-793-41

20mm

A cable is rolled once.

20mm

clamp filter (ferrite core) (Part No. 1-543-798-31)

20mm

clamp filter (ferrite core) (Part No. 1-543-793-41)

20mm

clamp filter (ferrite core) (Part No. 1-543-793-41)

clamp filter (ferrite core) (Part No. 1-543-798-31)

USB A

25mm

SECTION 4

TEST MODE

MZ-NH900

OUTLINE

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

1. ENTERING THE TEST MODE

Preparation:

Copy the “TestMode_Enter_For_900_800_700_600_600D_ Ver***.exe” folder of the PC application of the latest version to your PC in advance. (operating system: Windows 2000, Windows XP) Also, when using this application, the SonicStage Ver. 2.0 or 2.1 is necessary, and install it in your PC in advance.

Procedure:

1. If a Simple Burner has run on the PC, finish it (including the

one that is resident in the task tray).

2. Start the “TestMode_Enter_For_900_800_700_600_600D_

Ver***.exe”.

3. Insert the fully charged Ni-MH rechargeable battery (NH-

10WM).

4. Open and close the top panel of the main unit to wait until the

system reading finished.

5. Connect the main unit and PC by USB cable.

6. Check by device manager screen from property of “My

computer” that the set is recognised to your PC normally.

7. Click the [Enter TestMode] button on the screen of application

8. Disconnect the USB cable, when “OK” message is displayed

on the application screen.

9. Remove the battery.

2. 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

display.

Display check mode:

Hi-MD

REC

SYNC

Hi-SPLP

All lit

All off

Microcomputer

version

display

003 Ver *.***

“*.***”: Microcomputer version

PCMMONO

1SHUFA-B PGM

• When the X key is pressed and hold down, the display at that time is held so that display can be checked.

Screen of the PC application “TestMode_Enter_For_900_800_ 700_600_600D_Ver***.exe” (“***” is version number)

Note: Once the test mode is acti v ated with this application, the test mode

is then activated forcibly by only turning on the power. After the repair completed, be sure to release the test mode by using this application once more.

3. RELEASING THE TEST MODE

Procedure:

1. If a Simple Burner has run on the PC, finish it (including the one that is resident in the task tray).

2. Start the “TestMode_Enter_For_900_800_700_600_600D_ Ver***.exe”.

3. Insert the fully charged Ni-MH rechargeable battery (NH10WM).

4. Open and close the top panel of the main unit to wait until the system reading finished.

5. Connect the main unit and PC by USB cable.

6. Check by device manager screen that the set is recognised to your PC normally.

7. Click the [Exit TestMode] button on the screen of application

8. Disconnect the USB cable, when “OK” message is displayed on the application screen.

9. Remove the battery.

MZ-NH900

4. CONFIGURATION OF THE TEST MODE

Flow of the test mode:

Display Check Mode

003 Ver *.***

[VOL +]

key

Version display

→

All off → Version display...

Manual Mode

0 Manual

key

Overall Adjustment Mode

[VOL --]

key

0 AdjF**

key

Key Check Mode

[GROUP]

Open the lid

key

114 10

Self-Diagnosis Result Display Mode

0 1 0000

key

Sound Skip Check Result Display Mode (Play)

N ENT

key

0 P00r00

key

Sound Skip Check Result

[T MARK]

[REC]

key

switch

Display Mode (REC)

0 p00R00

key

Key Count Mode

[NAVI/MENU]

key

001 MENU 000

keyor

(press a few seconds)

→

All lit

5. MANUAL MODE

This is mode to adjust or check the operation of the set by function.

Operation of The Manual Mode

1. Enter the test mode (Display Check mode).

2. Press the [VOL+] key to activate the Manual mode where the LCD displays as shown below.

Display

0 Manual

Number of 1000th place

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 four-digit item number; 1000th place is a top item, 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).

5. To quit the Manual mode, press the x key and return to the Display Check mode.

Flow of manual mode operation:

[VOL +]

ELECTRICAL ADJUSTMENTS

MZ-NH900

Ver 1.1

1. PRECAUTIONS FOR ADJUSTMENT

1. Adjustment must be done in the test mode only. After adjusting, release the test mode. A key having no particular description in the text, indicates a set key.

2. Use the following tools and measuring instruments.

• Digital voltmeter

• Regulated dc power supply (two sets)

• Thermometer (using the Temperature Correction)

• Laser power meter

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

• MD1/HiMD1 hybrid adjustment disc MDW-74/GA1

(Part No. : 4-229-747-01)

• Hi-MD3 adjustment disc HMD1GSDJ (Part No. : 7-819-098-37) *1

• Remote commander in accessories (with LCD)

• Battery charging stand and AC adapter in accessories

• Ni-MH rechargeable battery (NH-10WM) in accessories

(full charged)

• PC application software for test mode “TestMode_Enter_F or_900_800_700_600_600D_V er***.exe” *2

• USB cable

*1) Hi-MD3 adjustment disc (HMD1GSDJ) is consumable.

Therefore if it is used 400 times, exchange it for a new.

*2) Use the newest version every time.

Copy the whole folder of this program to your PC. Operating system: Windows 2000, Windows XP When using this application, the SonicStage Ver. 2.0 or 2.1 is necessary, and install it in your PC in advance.

3. Unless specified otherwise, supply DC 1.5 V from battery terminals (CL431: BATT+, CL432: BATT–).

2. ADJUSTMENT SEQUENCE

Adjustment must be done with the following order.

Adjustment order:

1. Entering the test mode

2. Initialize the adjustment value

3. Setting the temperature correction value

4. Power supply voltage adjustment

5. Charge function check

6. Laser power check

7. Setting the adjustment values

8. Servo Overall adjustment

9. Resume clear

10. Releasing the test mode

3-3. Setting The Temperature Correction Value

Procedure:

1. In the test mode (Display Check mode), press the [VOL+] key to enter the Manual mode.

2. Press the > key twice, and press the [VOL+] key twice to display as follows.

Display

130 Temp

3. Press the > key once to select the item number 0131 and display as follows.

Display

131 ###S**

adjustment value (hexadecimal)

4. Measure the ambient temperature.

5. Adjust with [VOL+]/[VOL--] keys so that the adjusted value (hexadecimal value) becomes the ambient temperature. (example: 25 °C = 19h)

6. Press the X key to write the adjusted value.

7. Press the x key four times and back to the Display Check mode.

3-4. Power Supply Voltage Adjustment

Adjustment must be done with the following order.

3-4-1. Setting

Procedure:

1. Enter the test mode (Display Check mode), and make sure that the power supply voltage is 1.2 V.

2. Press the [VOL+] key to enter the Manual mode.

3. Press the [VOL+] key twice to display as follows.

Display

2 POWER

3. ADJUSTMENT OF THE EACH ITEM 3-1. Entering The Test Mode

Refer to the “SECTION 4. TEST MODE”.

3-2. Initialize The Adjustment Value

Procedure:

1. In the test mode (Display Check mode), press the [VOL--] key to enter the Overall adjustment mode.

2. Press the [T MARK] key and display “911 ResOK?”.

3. Press the X key to display “911 Reset!” and initialize the adjustment values.

4. Press the x key and back to Display Check mode.

4. Press the > key once, press the [VOL+] key once, and press the > key once again to display as follows.

Display

210 PwrAdj

5. Repeat the next procedures (3-4-2. PwrAdj Adjustments), and adjust all contents of “table 3-4-1. PwrAdj Specifications”.

MZ-NH900

3-4-2. PwrAdj adjustments

Repeat the following procedures and adjust all contents of “table 34-1. PwrAdj Specifications”.

Example Display (Item No. 2211)

211 AD **

adjustment value (hexadecimal)

Procedure:

1. Connect the digital voltmeter to measuring point (refer to the following table) and ground (CL433).

2. Press the > key to change the item number.

3. Adjust with [VOL+]/[VOL--] keys so that the value of digital voltmeter becomes specification value.

4. Press the X key to write the adjusted value.

5. Press the > key to select the next item.

6. Repeat adjustment from step 1 until item number 2233.

Adjustment Location:

ItemNo. Display Specification value Measuring point

2211 211 AD ** 2.05 V + 0.02 V CL8029 2212 212 AD ** 2.25 V ± 0.01 V CL8029 2213 213 AD ** 1.20 V + 0.01 V CL8001 2214 214 AD ** 3.10 V ± 0.015 V CL658 2215 215 AD ** 3.10 V ± 0.015 V CL658 2216 216 AD ** 3.02 V ± 0.02 V CL919 2217 217 AD ** 3.02 V ± 0.02 V CL919 2218 218 AD ** 2.275 V ± 0.01 V CL921 2219 219 AD ** 2.480 V ± 0.01 V CL921 2221 221 AD ** 2.740 V ± 0.01 V CL921 2222 222 AD ** 2.985 V ± 0.01 V CL921 2223 223 AD ** 2.52 V ± 0.02 V CL931 2224 224 AD ** 0.89 V ± 0.02 V CL604 2225 225 AD ** 1.08 V ± 0.02 V CL604 2226 226 AD ** 1.52 V ± 0.02 V CL604 2227 227 AD ** 2.27 V ± 0.02 V CL604 2228 228 AD ** 2.97 V ± 0.02 V CL604 2229 229 AD ** 0.94 V ± 0.02 V CL604 2231 231 AD ** 1.28 V ± 0.02 V CL604 2232 232 AD ** 2.57 V ± 0.02 V CL604 2233 233 AD ** 2.57 V ± 0.02 V CL604

Note1: “**” is adjustment value (hexadecimal number). Note2: Ground point of all measuring points is CL433.

Table 3-4-1. PwrAdj Specifications

CL460

(VBUS GND)

CL453

(VBUS 5V)

J302

MIC

(PLUG IN POWER)

CL919

– MAIN BOARD (Conductor Side) –

S892

(HALF LOCK)

C457

R454

C458

FB452

LF451

FB451

C456 C455

C459

FB101FB201

C306

R201

C202

C201

R203

R107

R106

R206

R205

C204

Q352

C351

R307

C308

R351

L252

R254

R154

L152

SL894

C352R352

R472

BCE

Q251

BCE

Q151

Q351

R355

R151

R155

C151

R156

584

R157

R251

C372

C251

R257

R362

R256

R255

(AEP, UK, EE)

D471

R473

R471

116

CN471

D457

R207

C313

BCE

C254

C154

R478R489

C205

R360

R490

R491

R103

R101

C101

R105

C105

C314

C206

C362 +

C367 C354 C365

F351

FB471

J402

DC IN 3V

−

CL432

(BATT–)

C108

C102

14 8

C107

C106

C104

22 28

C207

C315

C316

R312

R358

C360

IC351

15 21

R353

R483

R484

1B2C1C

Q471

C479

R485

R315

C327

C325

R309

R310

IC301

D604

DDS

D609

Q611

DDG

R619

C636

R361

C361

288

C364

IC606

C370

R354

C368

R356

R480

C478

C437

D450

D473

2C1B 1E

2E2B 1C

IC302

453

L303

R308

C324C322

R677

R608

IC607

C677

R684

Q618

R685R683

C621

C619

C426 +

R413

C417

D436

W404

C328

R314

C425

C323

C321

R609

Q607

C658

R646

C643

R681

∗

57 56 54 52 49 45 41 37 34 32 30 29

IC601

58 59 55 53 50 46 42 38 35 33 31 28

C630

60 61 27 26

R643

62 63 64 51 47 43 39 36 25 24 65 66 67 68 48 44 40 23 22 21

R678

69 70 71 72 20 19 18 17 73 74 75 76 16 15 14 13

IC605

77 78 79 96 100104 12 11 10 9

C604

80 81 92 95 99103107 8 7 6

R682

C625

82 83 5 4

C602

84 87 89 91 94 98 102106109111 3 2

85 86 88 90 93 97 101 105 108 110 112 1

R653

R654

R679

C671

R647

C673

C612

453

IC602

R414R415

Q401

C436

D442

D435

R601

Q608

1E 1B

BCE

C644

R628

R665

D601AKD614

C614

C601

C428

NICKEL METAL HYDRIDE

RECHARGEABLE BATTERY

NH-10WM

CN701

R618

2B 2E

R675

R649

R648

D613

R645

C675

C607

C613

R652

D401

110

C666

C642

C641

R616

R617

C609

C421

R434

∗

IC401

R436

BCE

Q407

CN401

BATTERY CHARGE

STAND

(BATTERY CASE)

CL921CL658

S894

BATTERY

INSERT DETECT

SL701

R455

R456

Q612

L608

R664

C672

C645

C638

R629

R671

D603

C633

R673

D602

C611

C616

C620

R605

R426

R425

C407

C408

C409

C412

L605

C637 +

L603

C635

C627

C634

C628

L601

C622

R668

R680

R670

D605

R620

R621

C649

C646

C648

R625

D608

R612

C415

C411

C650

R624

C676

Q602

D606

D607

D615

C674

2D 1D

Q601

2G S 1G

C429

SL892

C653

SL891

Q901

L907

L901

L906

D616

L802

FB801

R622

R623

C435

DRY BATTERY

SIZE "AA"

(IEC DESIGNATION R6)

1PC. 1.5V

C520

L504 L502

C557

C515

R501

R502

IC604

243

C668

C924

D905

R861

C819

R802

X801

R860

D803

C830

SL801

C556

C511

FB503

C822

C553

C518

R515

R516

C517

C516

Q503

Q502

C558

BCE

R513

R514

L507

GDD

C669

Q885

SDD

R893

R891

2C1B 1E

2E2B 1C

R892

R858

R526

L503

C554

C513

L505

C519

C527

5451 4845 43 42 4037 34 31

C564

5552 4947 44 41 3836 33 30

BCE

5653 5046 3935 32 29 14711 18222528

C521

25810131619212427

C522C560

36912141517202326

C570

C529

C525

C573

FB502

L506

C567 +

C566

D885

R872

R845

C891

Q886

C850

SL802

SL901

R868

∗

IC801

(BATT+)

R525

W403

C438

C523

C550

C528

∗

C530

C545

C524

IC501

R505

C539

C537

C536

C552

C547

C538

C531

C533

R509

C559R512

BCE

Q504

C883

VDR801

R823

R810

R827

R888

R520

C555

Q884

R524

R519

R511

C565

R518

R517

L881

R840

C843

D884

C526

R889

D882

R890

R887

R882

D883

R884

1E 1B 2C

C803

R812

R811

CL931

R881R883

2B 2E

Q881

R886

C804

C805

L801

C820

C818

CL802

R869

CL8001

FB808

C838

L804

C859

CL431

CL433 (GND)

CL8055

CL604

CL935

MZ-NH900

3-4-3. VBsAdj adjustments

Procedure:

1. In the “3-4-2. PwrAdj Adjustments” completed status, press the > key to display as follows.

Display

240 VBsAdj

2. Apply the voltage of 5 V to the CL453 (VBUS 5V) and CL460 (VBUS GND).

3. Press the > key to change the item number to 2241.

4. Adjust with [VOL+]/[VOL--] keys so that the value of digital voltmeter becomes specification v alue. (refer to “table 3-4-2. VBsAdj Specifications”)

5. Press the X key to write the adjusted value.

6. Press the > key to select the next item, and repeat adjustments to item number 2243 at the same manner as step 3 to step 5.

Item No. Display Specification value Measuring point

2241 241 AD ** 1.13 V ± 0.01 V CL8001 2242 242 AD ** 2.05 V + 0.02 V CL8029 2243 243 AD ** 3.30 V ± 0.01 V CL8055

Note1: “**” is adjustment value (hexadecimal number). Note2: Ground point of all adjustment points is CL433. Note3: Refer to page 18 for adjustment location.

Table 3-4-2. VBsAdj Specifications

7. Press the > key to select the item number 2244, and turn off the power supply of battery terminal.

8. Adjust with [VOL+]/[VOL--] keys so that the voltage of between CL935 and CL433 (GND) becomes 1.80 V (− 0.02 V).

9. Press the X key to write the adjusted value.

10. Apply the voltage of 1.2 V to the battery terminal again.

11. Press the x key to display “240 VBsAdj” (Item number:

2240).

12. Turn off the voltage of 5 V to the CL453 (VBUS 5V) and CL460 (VBUS GND).

13. Press the x key three times and back to the Display Check mode.

3-5. Charge Function Check

Note: When perform this check, don’t apply a voltage to battery terminals.

Procedure:

1. Connect the digital voltmeter to CL431 (BATT+) and CL433 (GND).

2. Enter the test mode using the AC adapter.

3. Press the [VOL+] key to enter the Manual mode.

4. Press the [VOL+] key twice to display as follows.

Display

2 POWER

5. Press the > key once, press the [VOL+] key once, press the

> key once, press the [VOL+] key three times, and press the > key once to display as follows.

Display

261 AD **

adjustment value (hexadecimal)

6. Adjust with [VOL+]/[VOL--] keys so that the value of digital voltmeter becomes 1.80 V.

7. Press the X key to write the adjusted value.

8. Press the > key to select the next item.

9. Disconnect the digital voltmeter.

10. Press the > key to select the next item (2262) and display “262 AD CC”.

11. Press the X key and confirm that the adjustment value changes from “CC” to “DD”.

If it changes to “BB”, IC401 (for charge IC) is fault.

12. Press the > key to select the next item (2263) and display “263 AD CC”.

13. Press the X key and confirm that the adjustment value changes from “CC” to “DD”.

If it changes to “BB”, IC401 (for charge IC) is fault.

14. Disconnect the power supply (AC adaptor).

15. Connect the resistor of the specified value (see table belo w) to the battery terminals (CL431: BATT+, CL432: BATT−), and then connect the AC adapter again, and enter the test mode.

16. Select item number 2264 through the operation similar to steps 2 to 8.

17. Press the X key and confirm that the adjustment value changes from “CC” to “DD”.

If it changes to “BB”, IC401 (for charge IC) is fault.

18. In the same manner, exchange the resistors with the power supply disconnected, and confirm that the adjustment value is “CC” in each item number.

Note: Be sure to disconnect the A C adapter when exchanging the resistors.

Doing so with the power supply connected causes a trouble.

Item No. Display Connecting Resistor

2262 262 AD ** No resistor 2263 263 AD ** No resistor 2264 264 AD ** 22 Ω (0.1 watts or more) 2265 265 AD ** 10 Ω (1.0 watts or more) 2266 266 AD ** 10 Ω (1.0 watts or more) 2267 267 AD ** 2.2 Ω (1.5 watts or more)

Table 3-5-1. Charge Adjustment Specifications

+ 43 hidden pages

Sony MZNH-900 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

3-2. CASE (LOWER) BLOCK

3-3. MAIN BOARD

3-4. UPPER PANEL BLOCK

mechanism deck (MT-MZNH900-181)

3-6. BATTERY CASE BLOCK

3-7. GEAR (BSA), GEAR (SB)

3-8. OP SERVICE ASSY

3-10. HOLDER ASSY

3-11. POSITION OF FERRITE CORE

TEST MODE

ELECTRICAL ADJUSTMENTS