Sony MZ-N505 User Manual

MZ-N505

SERVICE MANUAL

Ver 1.0 2002. 01

US and foreign patents licensed from Dolby
Laboratories.

• OpenMG, “MagicGate”, “MagicGate Memory Stick”, “Memory Stick”,

VAIO,MusicClip and their logos are trademarks of Sony Corporation.

• “WALKMAN” is a trademark 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.

• All other trademarks are trademarks of their respective owners. ™ and

® marks are omitted in this manual.

US Model

Canadian Model

AEP Model

UK Model

Model Name Using Similar Mechanism MZ-N707
Mechanism Type MT-MZN707-177
Optical Pick-up Name LCX-5R

SPECIFICATIONS

MD Recorder
Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs MQW
Wavelength:
Emission duration: continuous
Laser output: less than 44.6 µW
(This output is the value measured at a d i stance
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 stereo

Revolutions

Approx. 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

λ = 790 nm

9-873-459-01 Sony Corporation

2002A0500-1 Personal Audio Company

C 2002.1 Published by Sony Engineering Corporation

– Continued on next page –

PORTABLE MINIDISC RECORDER

MZ-N505

Coding

ATRAC (Adaptive TRansform Acoustic
Coding)
AT R A C3 — LP2/LP4

Modulation system

EFM (Eight to Fourteen Modula tion)

Number of channels

2 stereo channels
1 monaural channel

Frequency response

20 to 20,000 Hz ± 3 dB

Wow and Flutter

Below measurable limit

Inputs

Line in: stereo mini-jack , mi nimum input level
49 mV
Optical (Digital) in: optical (digital) mini-jack

Outputs

i: stereo mini-jack, ma ximum output level
5 mW + 5 mW, load impedance 16 ohm (except US model)
5 mW + 5 mW, load impedance 24 ohm (US model only)

General
Power requirements

Sony AC Power Adaptor (supplied) connected
at the DC IN 3 V jack (country model in
parentheses):

120 V AC, 60 Hz (USA, Canada)
230 V AC, 50/60 Hz (Continental Europe)

230 - 240 V AC, 50 Hz (UK)
Nickel Cadmium rechargeable battery NC­WMAA (supplied)
LR6 (size AA) alkaline battery (not su pplied)

Dimensions

Approx. 81 × 27.9 × 74.4 mm (w/h/d) (31/4 ×

1

/8 × 3 in.) without projections.

1

Mass

Approx. 104 g (3.7 oz) the recorder only

Supplied accessories

NC-WMAA Nickel Cadmium rechargeable ba

ttery

(European model only) (1)
AC power adaptor (1)
Headphones/earphones with a re m ote control (1)
Optical cable (European model only) (1)
USB cable (1)
Battery carrying case (1)
Carrying case with a belt clip (European model only) (1)
C

D-ROM (1)*

Minidisc (blank) (US and Canadian models only) (1)

∗ Do not play a CD-ROM on an audio CD player.

Design and specifications are subject to change
without notice.

Battery life

When recording

1)

2)

(Unit: approx.hours)(JEITA3))

Batteries SP

NC-WMAA

Stereo

LP2
Stereo

LP4
Stereo

467.5
Nickel
Cadmium
rechargeable

4)

battery
LR6 (SG)

Sony alkaline
dry battery

1)

The battery life may be shorter due to operating
conditions, the temperature of the location, and
varieties of batteries.

2)

When you record, use a fully charged
rechargeable battery. Recording time ma y
differ according to the alkali n e bat t eries.

3)

Measured in accorda nce with the JEITA (Japan
Electronics and Information Technology
Industries Associatio n) standa r d .

4)

When using a 100% fully charged rechargeable
battery.

5)

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

91316

5)

When playing

(Unit: approx.hours)(JEITA1))

Batteries SP

Stereo

NC-WMAA

15 16 20

LP2
Stereo

LP4
Stereo

Nickel
Cadmium
rechargeable

2)

battery
LR6 (SG)

Sony alkaline
dry battery

1)

Measured in accordance with the JEITA
(Japan Electronics and Information
Technology Industries Associa tion) standard.

2)

When using a 100% fully charged
rechargeable battery.

3)

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

42 48 56

3)

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 MANU AL OR IN SUPPLEMENTS PUB­LISHED BY SONY.

2

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0
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.

MZ-N505

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 Cadmiu m

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

•For use in your house: Use the AC power

adaptor supplied with this recor der. Do not
use any other AC power adaptor since it may
cause the recorde r to ma lfunction.

Polarity of t
plug

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.

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

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

• 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.

he

the lead free mark due to their particular size)

: LEAD FREE MARK

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

TABLE OF CONTENTS

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

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

3. DISASSEMBLY

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

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

3-3. Case (Upper) Section...................................................... 7

3-4. LCD Module, Case (Upper) Sub Assy ........................... 8

3-5. Mechanism Deck (MT-MZN707-177) ........................... 8

3-6. Set Chassis (5188) Assy.................................................. 9

3-7. MAIN Board ................................................................... 9

3-8. OP Service Assy (LCX-5R)............................................ 10

3-9. Holder Assy..................................................................... 11

3-10. DC Motor (Sled) (M602) ................................................ 11

3-11. DC SSM18B Motor (Spindle) (M601),

DC Motor (Over Write Head Up/Down) (M603) .......... 12

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

5. ELECTRICAL ADJUSTMENTS......................... 19

6. DIAGRAMS

6-1. Block Diagram – SERVO/USB Section – ...................... 32

6-2. Block Diagram – AUDIO Section – ............................... 33

6-3. Block Diagram – DISPLAY/KEY CONTROL/

POWER SUPPLY Section – ........................................... 34

6-4. Note for Printed Wiring Board and

Schematic Diagrams ....................................................... 35

6-5. Printed Wiring Board

– MAIN Board (Component Side) – ............................. 36

6-6. Printed Wiring Board

– MAIN Board (Conductor Side) – ............................... 37

6-7. Schematic Diagram – MAIN Board (1/4) – .................. 38

6-8. Schematic Diagram – MAIN Board (2/4) – .................. 39

6-9. Schematic Diagram – MAIN Board (3/4) – .................. 40

6-10. Schematic Diagram – MAIN Board (4/4) – .................. 41

6-11. IC Pin Function Description ........................................... 48

7. EXPLODED VIEWS

7-1. Case Section .................................................................... 55

7-2. Chassis Section ............................................................... 56

7-3. MAIN Board Section ...................................................... 57

7-4. Mechanism Deck Section-1 (MT-MZN707-177)........... 58

7-5. Mechanism Deck Section-2 (MT-MZN707-177)........... 59

8. ELECTRICAL PARTS LIST ............................... 60

3

MZ-N505

Notes on using OpenMG Jukebox with Windows
2000/Windows XP

If your computer is Windows 2000 Professional, Windows XP Home Edition, or
Windows XP Professional, please be aware of the following before instaling OpenMG
Jukebox.

1

With Windows 2000 Professional, you must log on as “Administrators” (or with the
user name “Administrator”) to install OpenMG Jukebox.

2

With Windows XP Home Edition or Windows XP Professional, you must log on
with user name “Computer Administrator” to install OpenMG Jubebox. To check
whether a user name has the attribute of “Computer Administrator” or not, go to
[Control Panel] - [User Account].

Notes on using OpenMG Jukebox with Windows XP/
Windows Me

If Windows XP/Windows Me is installed in your computer, and you perform the
“System Restore” function of the Windows “System Tools,” the songs managed by
OpenMG Jukebox may become corrupted and rendered unplayable.
Therefore, before executing “System Restore,” back up the songs using “OpenMG
Jukebox Backup Tool” first.
Then, after the “System Restore” function is finished, restore the songs using
“OpenMG Jukebox Backup Tool” to ensure the integrity and reliability of song
playback.
For more information about backup, refer to the online Help for OpenMG Jukebox.

Note

When songs become unplayable by executing “System Restore,” an error dialog box may be
displayed. In this case, follow the displayed messages.

)

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.

laser-tap

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 conve x part of the open/close detect switch
(S806 on MAIN board) with a tape in advance.
Handle the FLEXIBLE board (overwrite 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 (overwrite head) and the MAIN board with
the lead wires in advance.

• Replacement of CXD2677-202GA (IC801) used in this set re­quires a special tool.

• The shipment data will be cleared when the NV is reset. There­fore, change the NV adjusted values following the Change of
NV Adjusted Values immediately after the NV was reset. (See
page 19)

• This set requires the patch data in the nonvolatile memory
(IC804) to be rewritten using the application, when the MAIN
board or nonvolatile memory (IC804) was replaced. (See page

29)

System requirements

•

IBM PC/AT or Compatible (The software does not run on Macintosh.)
CPU: MMX™ Pentium® 233 MHz or higher (Pentium® II 400 MHz or higher is
recommended.)

Hard disk drive space: 60 MB or more (The amount of necessary space depends on

the version of the Windows OS or the size of your audio files.)

RAM: 64 MB or higher (128 MB or higher is recommended for Windows

Edition/Windows
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: Windows
Professional/Windows® Me/Windows® XP Home Edition/Windows® XP
Professional (manufacturer installed)

The NTFS format of Windows
Windows
with the standard (factory) settings.
This software is not supported by the following environments.

– Windows
– An environment that is an upgrade of the original manufacturer-installed

operating system, as in the following examples:
Windows

Windows
Windows

– Multi-boot environment with Windows

98 (or Windows® 98 Second Edition/Windows®Me)

•

Display: High (16bit) Color or more (800 × 480 dot or more)

•

Internet access: for Web registration and EMD services

•

Internet access: for sfortware upgrades and CDDB2 use. (US and Canadian models)

•

Windows

Notes

• Trouble-free operation is not assured within a multiple-monitor environment.

• We do not assure trouble-free operation for all computers satisfying the system requirements.

• Trouble-free operation is not guaranteed following the self-conducted upgrade of home-built

PCs or operating systems.

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

all computers.

• For details, refer to “Net MD Help ” of the online help.

Note

The optical digital output connector (on computers provided with one) may be disabled
during playback for the protection of copyrights.

®

XP Professional.)

®

98/Windows® 98 Second Edition/Windows® 2000

®

®

XP Professional (manufacturer-installed) is supported only when used

®

95, Windows® NT, or other versions of Windows® NT (such as Server)

®

3.1/Windows® 95 t Windows® 98 (or Windows® 98 Second Edition/

®

Me)

®

Me/Windows® 2000 Professional t Windows® XP

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

2000 Professional, Windows® XP Home Edition, or

®

2000 (or Windows® XP) and Windows

®

XP Home

®

FLEXIBLE board
(over write head)

case (upper

4

tape

S806

MAIN board

SECTION 2

GENERAL

MZ-N505

This section is extracted from
instruction manual.

Lookingat the controls

The recorder

1

2
3

4

5

A OPEN button
B END SEARCH button
C X (pause) button
D DC IN 3V jack
E VOL +/– button

The VOL + button has a tactile dot.

F N (play) button

The N button has a tactile dot.

./> (search/AMS) button
x (stop)/CHARGE button

G Display window
H GROUP/CANCEL button
I T MARK/REC button
J HOLD switch
K USB connecting jack
L Battery compartment
M LINE IN (OPTICAL) jack
N MENU/ENTER button
O i (headphones/earphones) jack

The display window of the recorder

AB CDE F G

LP2.4

6

CHARGE

7
8

9
q;

qa
qs
qd
qf
qg

A MONO (monaural) indication
B LP mode indication
C Mega bass indication
D Disc indication

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

E Level meter

Shows the volume of the MD being
played or recorded.

F REC REMAIN/REMAIN (remaining

time/tracks) indi cation
Lights up along with the remain in g
time of the track, the remaining time
of the MD, or the remaining number
of tracks.

G SYNC (synchro-recording) indication

Digital MEGA BA

JI

H REC indication

I Battery indication

J Time display
K Disc name/track name indication

L Grou p i ndication

M Character information display

N Play mode indication

H

SS

MLKN

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

Shows approximate battery condition.

Lights up when labeling a disc or a
track.

Lights up when group mode is on .

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

Shows play mode of the MD.

10

The headphones/earphoneswith a remote control

A

B
C

D
E

A ./>/N (search/AMS/play) •

>/. button

B x (stop) • ENTER button
C X (pause) • CAPS button
D EDIT button
E VOL +/ – button

F Headphones/earphones

Can be replaced with optional
headphones/earphones.

G HOLD switch

Slide to lock the controls of the
remote control.

H T MARK but ton
I DELETE button

11

F

G

H

I

12

5

MZ-N505

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

3-1. DISASSEMBLY FLOW

SET

3-2. CASE (LOWER)

(Page 7)

3-3. CASE (UPPER) SECTION

(Page 7)

SECTION 3

DISASSEMBLY

3-4. LCD MODULE,

CASE (UPPER) SUB ASSY
(Page 8)

3-6. SET CHASSIS (5188) ASSY

(Page 9)

3-7. MAIN BOARD

(Page 9)

3-5. MECHANISM DECK

(MT-MZN707-177)
(Page 8)

3-8. OP SERVICE ASSY

(LCX-5R)
(Page 10)

3-9. HOLDER ASSY

(Page 11)

3-10. DC MOTOR

(SLED) (M602)
(Page 11)

3-11. DC SSM18B MOTOR

(SPINDLE) (M601),
DC MOTOR (OVER
WRITE HEAD UP/DOWN)
(M603)
(Page 12)

6

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

6

case (upper) section

1

flexible board
(CN801)

3

two screws
(M1.4)

5

boss

4

torsion spring
(pop up-L)

case (upper)

torsion spring (p up-L)

Set chassis
(5188) assy

2

Slide the open slider in the direction of the arrow,
and open the case (upper) section.

3-2. CASE (LOWER)

1

two screws
(M1.4)

MZ-N505

1

two screws
(M1.4)

3-3. CASE (UPPER) SECTION

2

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

7

MZ-N505

3-4. LCD MODULE, CASE (UPPER) SUB ASSY

1

four screws
(1.7

×

2

LCD module

Note: On installation, adjust

the position of both switch
and knob (hold).

switch

2.5)

3

button (control)

4

case (upper) sub assy

knob (hold)

3-5. MECHANISM DECK (MT-MZN707-177)

3

step screw (MD)

5

4

6

mechanism deck (MT-MZN707-177)

flexible board (optical pick-up)
(CN501)

2

flexible board (motor)
(CN502)

1

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

8

3-6. SET CHASSIS (5188) ASSY

y

2

two screws

×

2.5)

(1.7

3

set chassis (5188) ass

MZ-N505

3-7. MAIN BOARD

1

four screws

×

2)

(M1.4

3

battery case

4

main board

1

battery terminal board (+)

2

battery terminal (–)

9

MZ-N505

3-8. OP SERVICE ASSY (LCX-5R)

1

washer (0.8-2.5)

3

screw (M1.4)

4

rack spring

2

gear (SA)

5

screw (M1.4)

6

thrust detent spring

8

Pull off lead screw.

7

B

OP service assy (LCX-5R)

over write head section

9

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

Note: Do not open the entire assy forcibly,

A

A

, remove the OP service assy

B

.

when opening the over write head.

10

3-9. HOLDER ASSY

y

1

2

Open the holder assy

convex portion

3

4

boss

MZ-N505

holder ass

3-10. DC MOTOR (SLED) (M602)

2

4

two screws (M1.4)

5

DC motor (sled) (M602)

washer (0.8-2.5)

3

boss

3

gear (SA)

1

Remove six solders
of the motor flexible board.

11

MZ-N505

3-11. DC SSM18B MOTOR (SPINDLE) (M601), DC MOTOR (OVER WRITE HEAD UP/DOWN) (M603)

1

Remove six solders of the
motor flexible board.

2

tapping screw

3

motor cover

7

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.

6

8

three tapping screws

gear (HA)

4

gear (HB)

gear (HA)

3.15 mm

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

9

DC SSM18B motor
(spindle) (M601)

5

gear (HC)

12

1
0

9

9

SECTION 4

TEST MODE

MZ-N505

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 discriminate 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.

SETTING METHOD OF TEST MODE

There are three different methods to set the test mode:
1 Short SL801 (TEST) on the MAIN board with a solder bridge

(connect pin <zvn of IC801 to the ground). Then, turn on the power .

– MAIN Board (Conductor Side) –

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.

Set LCD display

All lit

All off

Microcomputer
version
display

V1.100

SL801

C814

R858

R823

C816

R822

R824

R825

R857

FB801

C817

C839

C625

(TEST)

SL801

C809

C822

C815

C821

+

+

6

189

187

182

186

190

194

8

191

185

183

184

209

192

175

173

7

207

215

211

171

179

4

181

188

213

169

177

(TEST)

+

193

195

197

R821

199

203

178

180

R817

174

176

170

172

827

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

ing the [VOL --] key press the following order:

> t > t . t . t > t

. t > t . t X t X

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

pressing the x key, press the keys on the remote com­mander with the following order:

> t > t . t . t > t . t

> t . t X t X

• When the 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 SL801 (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.

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.

13

MZ-N505

x

key

x

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]

N

key

N

key

[Minor item switching]

[Adjusted value variation]

X

key: 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.

CONFIGURATION OF TEST MODE

[Test Mode $Display Check Mode%]

Press the > or [VOL +] key

[Manual Mode]

Press the x key

Press the . or [VOL --] key

[Overall Adjustment Mode]

Press the x key

Press the [MENU/ENTER] key

[Self-Diagnosis Result Display Mode]

Press the

x 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 N or N and [T MARK/REC] keys

[Sound Skip Check Result Display Mode]

Press the x key

Press the

[T MARK/REC] and X keys

[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.

Set 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).

14

MZ-N505

5. The display changes a shown below each time the

[MENU/ENTER] key .

• Address & Adjusted Value Display

Set LCD display

011 C68S1B

item number address adjusted value

• Jitter Value & Adjusted Value Display

Set LCD display

011 0FEJ1B

item number jitter value adjusted value

• Block Error Value & Adjusted Value Display

Set LCD display

011 063B1B

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 19).

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 pickup 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 pickup was replaced.

• Self-Diagnosis Result Display Mode Setting Method

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

2. In the display check mode, [MENU/ENTER] key activates the
self-diagnosis result display mode where the LCD display as
shown below.

Set LCD display

item number

• ADIP Error Value & Adjusted Value Display

Set LCD display

block error

value

adjusted value

011 081A1B

item number

• Focus Drive Value & Adjusted Value Display

Set LCD display

ADIP error

value

adjusted value

011 000F1B

item number Focus

• Item Title Display

Set LCD display

drive value

adjusted value

0XX 1 0000

error display code history code Total recording time

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

> key is pressed, LCD display descends

1

0XX 1 ****
0XX N ****
0XX N1****
0XX N2****
0XX R_****

when error occurred

011 LrefPw

item number item title

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

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

x key to return to the

1

XX

: Error code

****

: Total recording time

If the [MENU/ENTER] key is pressed with this display, the LCD
switches to the simple display mode.

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

15

MZ-N505

• Description of Error Indication Codes

Problem Indication code Meaning of code Simple display Description

No error 00 No error --- No error

01

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

Disc error 35

11 TOC error TOC Faulty TOC contents
12 Data reading error Data Data could not be read at SYNC

31 Offset error Ofst Offset error

32

33

34

Illegal access target
address was specified

Focus error ABCD
offset error

Tracking error
Offset 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

1 The 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. Press the [MENU/ENTER] key activates the self-diagnosis re­sult display mode.

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

16

MZ-N505

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 N key or N and [T MARK/REC] keys, and the

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

Set LCD display

000 P**R**

Total count of play
system errors (hex.)

3. When the N 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 sho wn below . Also, if the . key
is pressed, the display item moves up by one, then if the

N and [T MARK/REC] keys are pressed, the display in the

record mode appears.
When the N and [T MARK/REC] keys are 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 N key is pressed, the dis­play in the play mode appears.

Playing sound skip
result display

Recording sound skip
result display

000 P**R**
000 EIB **

Total count of record
system errors (hex.)

000 P**R**
000 BOvr**

• 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 x key.

• Setting Method of Key Check Mode

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

2. Press the [T MARK/REC] and X keys on the remote commander
activates the key check mode. (At the last tw o digits, AD value of
remote commander key line is displayed in hexadecimal)

Remote commander LCD display

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

004

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:

Set LCD display

000 Stat**
000 Adrs**
000 BEmp**

000 Bful**
000 Rtry**
000 ######

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.)

004 FF

Example2: When the > key on the remote commander is

pressed:

Set LCD display

004 rPLAY

17

MZ-N505

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

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

Set LCD display

888 SET OK

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

sidered as OK:

Set LCD display

888 RMC OK

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.

18

SECTION 5

ELECTRICAL ADJUSTMENTS

MZ-N505

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.

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)

3. Unless specified otherwise, supply DC 3V from the DC IN
3V jack (J601).

4. Switch position

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

ADJUSTMENT SEQUENCE

1. NV Reset (EEPROM clear)

r

2. Power Supply Manual Adjustment

r

3. Temperature Correction (item number: 015)

r

4. Laser Power Check

r

5. Electrical Offset Adjustment

Caution: This adjustment must be made with

no disc loaded.

r Overall Mode

6. CD Overall Adjustment

r

7. MO Overall Adjustment

r

8. RESUME Clear




Manual Mode






Manual Mode







Manual Mode

















Manual Mode



NV RESET

Caution: The shipment data will be cleared when the NV is reset.

Therefore, change the NV adjusted values following the
Change of NV Adjusted Values immediately after the
NV was reset.
Change the NV adjustment values according to the mi­crocomputer version.

• Setting Method of NV Reset

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

Remote commander LCD display

021 ###SCC

###

: Address

2. Press the X key.

Remote commander LCD display

021 ResOK?

3. Press the X key once more.

Remote commander LCD display

021 Res***

NV reset (after several seconds)

Remote commander LCD display

021 Reset!

Note: If the version of the microcomputer is 1.000 or later, “3. Tempera-

ture Correction” and “2. Power Supply Manual Adjustment” can
be performed continuously in reverse order with pressing the

[END SEARCH] key in the overall adjustment mode.

4. Press the
mode (display check mode).

x key to quit the manual mode, and return the test

19

MZ-N505

• Change of NV Adjusted Values (version 1.100)

Caution: Change the NV adjustment values according to the mi-

crocomputer version.
In this set, some adjusted values were set in the manual mode at
the shipment, but these will be cleared when the NV is reset.
Therefore, modify the NV adjusted values through the following
procedure immediately after the NV was reset.

1. Item numbers in which the NV adjusted values are to be modi-

fied
– Change ABCD gain [Hpit] initial value (item number 336)

Caution: The ABCD gain [Hpit] initial value must be

changed before the overall adjustment.
– Change BatFlg value (item number 741)
– Change NiRec0 to 4 values (item numbers 771 to 775)
– Change NiPb 1 to 4 values (item numbers 776 to 779, 781)
– Change CL V dri ve v oltage limiter (item numbers 865, 866)
– Change x2 CL V speed gain, +6dB compared to con ventional

(item numbers 867, 868)

– Change x2 CL V phase gain, +3dB compared to con ventional

(item numbers 871, 872)

– Change x2/x1 switching temperature threshold value

(+10°C t +5°C) (item numbers 873, 874)

2. NV adjusted values modifying procedure

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

Set LCD display

336 ###S**

###

: Address

**

: Adjusted value

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

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

Set LCD display

772 AD **

**

: Adjusted value

11) Adjust with the [VOL +] key (adjusted value up) or [VOL --]
key (adjusted value do wn) so that the adjusted value becomes
7C.

12) Press the X key to write the adjusted value.

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

Set LCD display

773 AD **

**

: Adjusted value

14) Adjust with the [VOL +] key (adjusted value up) or [VOL --]
key (adjusted value do wn) so that the adjusted value becomes
7D.

15) Press the X key to write the adjusted value.

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

Set LCD display

2) Adjust with the
key (adjusted value do wn) so that the adjusted value becomes

08.

3) Press the X key to write the adjusted value.

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

Set LCD display

[VOL +] key (adjusted value up) or [VOL --]

741 AD **

**

: Adjusted value

5) Adjust with the [VOL +] key (adjusted value up) or [VOL --]
key (adjusted value do wn) so that the adjusted value becomes

02.

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

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

Set LCD display

771 AD **

**

: Adjusted value

774 AD **

**

: Adjusted value

17) Adjust with the
key (adjusted value do wn) so that the adjusted value becomes
7F.

18) Press the X key to write the adjusted value.

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

Set LCD display

[VOL +] key (adjusted value up) or [VOL --]

775 AD **

**

: Adjusted value

20) Adjust with the [VOL +] key (adjusted value up) or [VOL --]
key (adjusted value do wn) so that the adjusted value becomes

81.

21) Press the X key to write the adjusted value.

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

Set LCD display

8) Adjust with the [VOL +] key (adjusted value up) or [VOL --]
key (adjusted value do wn) so that the adjusted value becomes
6E.

20

776 AD **

**

: Adjusted value