Sony MZ-N520,MZ-N520CK Service Manual
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
AEP Model
UK Model
MZ-N520
E Model
MZ-N520/N520CK
Australian Model
MZ-N520
SPECIFICATIONS
MZ-N520/N520CK
US and foreign patents licensed from Dolby
Laboratories.
– Continued on next page –
Model Name Using Similar Mechanism MZ-N510
Mechanism T ype MT-MZN710-177
Optical Pick-up Name LCX-5R
Ver 1.0 2004.04
9-877-751-01 Sony Corporation
2004D1678-1 Personal Audio Company
© 2004.04 Published by Sony Engineering Corporation
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 th e 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 (Adaptive TRansform Acoustic
Coding)
ATRAC3 — LP2/LP4
photo : silver model
• SonicStage, MD Simple Burner,
OpenMG, Magic Gate, MagicGate
Memory Stick, Memory Stick , Net MD,
ATRAC, ATRAC3, ATRAC3plus and
their logos are trademarks of Sony
Corporation.
• Microsoft, Windows, Windows NT and
Windows Media are trademarks or
registered tradema rk s of Microsoft
Corporation in the Uni ted States and /or
other countries.
• IBM and PC/AT are registered
trademarks of International Business
Machines Corporation.
• Macintosh is a t r ademark of Apple
Computer, Inc. in the United States and/
or other countries.
• MMX and Pentium are tr ademarks or
registered trademarks of Intel
Corporation.
• All other trademarks and regist ered
trademarks ar e trademarks or registered
trademarks of their respective holders .
• ™ and ® marks are omitted in this
manual.
• CD and music-related da ta fr om
Gracenote, Inc., copyright © 2000-2003
Gracenote. Gracenote CDDB
R
Client
Software, copyright 2000- 2003
Gracenote. This product an d service
may practice one or more of the
following U.S. Patents: #5,987,525;
#6,061,680; #6,154,7 73, #6,161,132,
#6,230,192, #6,230,2 07, #6,240,459,
#6,330,593 and othe r patents issued or
pending.
Gracenote and CDDB are registered
trademarks of G racenote. The
Gracenote logo and logotype, the
Gracenote CDDB logo, a nd the
“Powered by Gracenote” logo are
trademarks of Gracenote.
2
MZ-N520/N520CK
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.
Modulation system
EFM (Eight to Fourteen Modulation)
Frequency response
20
2.5mW + 2.5mW; load impedance
16 Ω (European models)
to 20,000 Hz ± 3 dB
Inputs
1)
Line in:
stereo mini-jack for analog input
(minimum input level 49 mV)
optical (digital) mini-jack for optical
(digital) input
Outputs
i2): stereo mini-jack
Maximum output level
5 mW + 5 mW; load impedance
16 Ω(Other models)
Power requirements
Sony AC Power Adaptor connected at the DC
IN 3V jack
The recorder:
Nickel metal hydride rechargeable battery
NH-7WMAA 1.2V 700mAh (MIN) Ni-MH
LR6 (size AA) alkaline battery
Dimensions
Approx. 81.0 × 27.7 × 74.4 mm (w/h/d)
(3
1
/4× 11/8× 3 in.)
Mass
Approx. 103 g (3.6 oz) the recorder only
1)
The LINE IN (OPTICAL) jack is used to
connect either a digital (optical) cable or a line
(analog) cable.
2)
The i jack connects either headphones/
earphones or a line cable.
3)
Measured in accordance with JEITA.
Car connecting pack (only MZ-N520CK)
Frequency response: 50 to 20,000Hz (Differs
depending on your car cassette deck)
Dimensions: Approx. 102.4 × 12.1 × 63.8 mm
(w/h/d) (4
1
/8× 1/2× 25/8 in.)
Mass: Approx. 42 g (1.5 oz)
Cord length: Approx. 1.5 m
Car battery cord (only MZ-N520CK)
Input voltage: DC 12 V/24 V (only for negative
# ground cars)
Rated output voltage: DC 3.0 V
Rated output current: 1,000 mA
Dimensions: Approx. 36.0 × 26.2 × 101.1 mm
(w/h/d) (1
7
/16× 11/16× 4 in.) including
projecting parts
Mass: Approx. 60 g (2.2 oz)
Cord length: Approx. 1.5 m
Checking the supplied accessorie
AC power adaptor (1)
Headphones/earphones with a remote control (1)
Dedicated USB cable (1)
Optical cable (1) (only MZ-N520)
Rotary commander (1) (only MZ-N520CK)
CD-ROM (SonicStage Ve r. 2.0 and MD
Simple Burner Ve r. 2.0)(1) *
Car battery cord (1) (only MZ-N520CK)
Car connecting pack (1) (only MZ-N520CK)
Carrying case with Velcro strips (1) (only MZ-N520CK)
Carrying pouch (1) (European model only)
Design and specifications are subject to change
without notice.
∗Do not play a CD-ROM on an audio CD player.
Battery life
The battery life ma y be shorter due to
operating conditions, the temperature of
the location, or alkaline dry battery you
use.
When recording
(Unit: approx.hours)(JEITA1))
1)
Measured in acc ordance with the JEITA (Japan
Electronics and Information T echnology
Industries Association) sta nda r d.
Batteries SP
Stereo
LP2
Stereo
LP4
Stereo
Nickel metal
hydride
rechargeable
battery
2)
2)
When using a 100% fully charged nickel metal
hydride rechargeable battery (NH-7WMAA).
6910
LR6 Sony
alkaline dry
battery
3)
3)
When using a Sony LR6 (SG) alkaline dry
battery (produced in Japan).
10 14 18.5
When to replace the batteries
When the dry battery or rechargeable
battery is weak, flashing r or
“LoBATT” appears in th e di splay.
Replace the dry battery or charge the
rechargeable battery.
The battery lev el indic ator is app roximate.
It may be more or less than the indication
depending on the operating condition.
Note
Stop the recorder before replacing battery.
When playing
(Unit: approx.hours)(JEITA)
Batteries SP
Stereo
LP2
Stereo
LP4
Stereo
Nickel metal
hydride
rechargeable
battery
15 16 20
LR6 Sony
alkaline dry
battery
42 48 56
3
MZ-N520/N520CK
On power sources
• Use house current, nickel metal hydride
rechargeable battery, LR6 (size AA) battery,
or car battery.
• For use in your house: Do not use any other
AC power adaptor since it may cause the
recorder to malfunction
.
• 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 wa ll ou tl et, 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.
Polarity of the
plug
TABLE OF CONTENTS
1. SERVICING NOTES............................................... 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Case (Lower) ........................................................... 7
3-2. Upper Panel Section ................................................ 7
3-3. LCD Module, Button (Control)............................... 8
3-4. MAIN Board ............................................................ 8
3-5. Mechanism Deck (MT-MZN710-177).................... 9
3-6. Set Chassis Assy...................................................... 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......................... 19
6. DIAGRAMS
6-1. Block Diagram......................................................... 40
6-2. Printed Wiring Board – MAIN Board (Side A) – ... 41
6-3. Printed Wiring Board – MAIN Board (Side B) –... 42
6-4. Schematic Diagram – MAIN Board (1/4) –........... 43
6-5. Schematic Diagram – MAIN Board (2/4) –........... 44
6-6. Schematic Diagram – MAIN Board (3/4) –........... 45
6-7. Schematic Diagram – MAIN Board (4/4) –........... 46
6-8. IC Pin Function Description.................................... 51
7. EXPLODED VIEWS
7-1. Case Section ............................................................ 57
7-2. Chassis Section ........................................................ 58
7-3. MAIN Board Section............................................... 59
7-4. Mechanism Deck Section-1 (MT-MZN710-177) ... 60
7-5. Mechanism Deck Section-2 (MT-MZN710-177) ... 61
8. ELECTRICAL PARTS LIST ............................... 62
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.
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 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.
4
MZ-N520/N520CK
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
SECTION 1
SERVICING NOTES
laser-tap
• 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.
upper panel ass
y
MAIN board
S803
FLEXIBLE board
(over write head)
•This set requires the patch data in the nonvolatile memory
(IC852) to be rewritten using the application, when the MAIN
board was replaced. (See page 31)
Providing the required system environment
The following system environme nt is required in order to use the SonicStage Ver. 2.0/MD
Simple Burner Ver. 2.0 software for the MD Walkman.
This software is not supported by the following environments:
• OSs other th an the indic a te d 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
• We do not ensu re tr ouble-free operation on all computers that sa tisfy the system 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 hibe r na ti on fu nc tion on all
computers.
• For Windows 2000 Professional users, install Service Pack 3 or later version befo re usi ng the
software.
System requirements
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: 200 MB or more (1.5 GB or more is
recommended) (The am ount space will vary according to Windows
version and t he number of music files stored 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))
Operating
System
Factory installed:
Windows XP Media Center Edition 2004/Windows XP Media Center
Edition/Windows XP Professional/Windows XP Home Edition/
Windows 2000 Professional/Windows Millennium Edi tion/Windows
98 Second Edition
Display High Color (16bit) or higher, 800 × 600 dots or better (1024 × 768 dots
or better is recommended)
Others
•
Internet access: for Web registration, EMD services and CDDB
•
Wind ows Media Player (version 7.0 or higher) i nstalled for playing
WMA files
Notes
5
MZ-N520/N520CK
SECTION 2
GENERAL
The recorder
A Display window
B GROUP button
C X (pause) button
D END SEARCH button
E MENU button
F OPEN button
G VOL +
*
, – button
*
VOL +
has a tactile dot.
H 4-way control key
ENTER • N*
.,> (search/AMS)
x • CANCEL/CHG (stop/cancel/
charge)
* N has a tactile dot.
I REC (record) • T MARK button
J USB connecting jack
K Handstrap hole
Use the hole to attach your own strap.
L Battery compartment (at the bottom)
M LINE IN (OPTICAL) jack
N HOLD switch
To p revent the buttons from being
accidentally operated when you carry
the recorder, use this function.
O i (headphones/earphones) jack
P DC IN 3V jack
The display window of the recorder
A MONO (monaural) indication
B LP mode indication
C Sound indic at i ons
D Disc indication
Shows that the disc is rotating for
recording or playing an MD.
E Level meter
Shows the volume of the MD being
played or recorded.
F Disc name/track name indication
Lights up when labeling a disc or a
track.
G SYNC (synchro -recording) indication
H REC indication
Lights up while recording. When
flashing, the recorder is in record
standby mode.
I Battery indication
Shows approximate battery condition.
J : Indication for remaining playing
time of the current track or of the disc
: Indication for remaining
recordable time of the disc
K Time display
L
L
Character information display
Displays the disc and track names,
error messages, track numbers, etc.
M Play mode indications
Shows the play mode (shuffle play,
repeat play, group play, bookmark
play, etc.) of the MD.
SOUND
LP2.4 1 2
12 3456 7
8
qaq;9qd
The headphones/earphones with a remote control
A Clip
B HOLD switch
To p revent the buttons from being
accidentally operated w hen you carry
the recorder, use this function.
C (group) +, – button
D Headphones/earphones
Can be replaced with optional
headphones/earphones.
E Volume Control (VOL+, –)
Turn to adjust the volume.
F NX* (to press): play, pause
*
NX has a tactile dot.
G x (stop) button
H ., > (search/AMS) button
1
4
5
6
7
8
3
2
This section is extracted from
instruction manual.
6
MZ-N520/N520CK
3-1. CASE (LOWER)
(Page 7)
3-2. UPPER PANEL SECTION
(Page 7)
3-3. LCD MODULE,
BUTTON (CONTROL)
(Page 8)
3-5. MECHANISM DECK
(MT-MZN710-177)
(Page 9)
3-6. SET CHASSIS ASSY
(Page 9)
3-4. MAIN BOARD
(Page 8)
In order to remove mechanism deck,
please remove MAIN board and upper panel section.
3-7. OP SERVICE ASSY (LCX-5R)
(Page 10)
3-8. HOLDER ASSY
(Page 11)
3-9. DC MOTOR
(SLED) (M602)
(Page 11)
3-10. DC MOTOR
(OVER WRITE HEAD UP/DOWN) (M603),
DC SSM18B MOTOR
(SPINDLE) (M601)
(Page 12)
SET
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
7
MZ-N520/N520CK
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE (LOWER)
3-2. UPPER PANEL SECTION
1
two screws
(M1.4)
2
two screws
(M1.4)
3
Remove the case (lower) in th
e
direction of the arrow.
5
torsion spring
(pop up-L)
3
two step screws
2
Slide the open slider in the direction of the arrow,
and open the upper panel section.
set chassis assy
torsion spring (pop up-L)
1
flexible board
(CN871)
4
upper panel sectio
n
8
MZ-N520/N520CK
3-3. LCD MODULE, BUTTON (CONTROL)
3-4. MAIN BOARD
3
three
screws
1
six screws
2
LCD module
Note: On installation, adjust the position of
both switch and knob (hold).
5
button (control)
4
open locker
knob (hold)
switch
case (upper) sub ass
y
8
MAIN board
6
battery terminal (–)
5
battery terminal board (+
)
2
flexible board (motor)
(CN701)
3
flexible board
(CN871)
7
flexible board (optical pick-up)
(CN501)
1
Remove two solders of the
flexible board (over write head).
4
four screws
(M1.4)
9
MZ-N520/N520CK
3-5. MECHANISM DECK (MT-MZN710-177)
3-6. SET CHASSIS ASSY
The portion which projected is removed.
1
two step screws (MD)
3
mechanism deck
(MT-MZN710-177)
2
2
two screws
(TP 1.7
×
2.5)
5
set chassis ass
y
4
ground spring (USB)
1
tension spring
(lock)
3
battery case
10
MZ-N520/N520CK
3-7. OP SERVICE ASSY (LCX-5R)
4
rack spring
3
screw (M1.4)
1
washer (0.8-2.5)
2
gear (SA)
5
screw (M1.4)
6
thrust detent spring
8
Pull off lead screw.
7
over write head section
OP service assy (LCX-5R)
9
Opening the over write head
toward the direction A, remove the OP service assy
(LCX-5R) toward the direction B.
A
B
Note: Do not open the entire assy forcibly,
when opening the over write head.
11
MZ-N520/N520CK
3-8. HOLDER ASSY
3-9. DC MOTOR (SLED) (M602)
4
holder ass
y
3
boss
3
boss
1
convex portion
2
Open the holder assy
2
washer (0.8-2.5)
5
DC motor (sled) (M602)
4
two screws (M1.4)
3
gear (SA)
1
Remove six solders
of the motor flexible board.
12
MZ-N520/N520CK
3-10. DC MOTOR (OVER WRITE HEAD UP/DOWN) (M603), DC SSM18B MOTOR (SPINDLE) (M601)
9
DC SSM18B motor
(spindle) (M601)
8
three tapping screws
2
tapping screw
3
motor cover
6
gear (HA)
4
gear (HB)
5
gear (HC)
DC motor
(over write head up/down)
(M603)
3.15 mm
gear (HA)
Note: Press-fit the gear (HA) up to the position of
the DC motor (over write head up/down)
(M603) as shown below.
7
DC motor (over write head up/down)
(M603)
1
Remove six solders of the
motor flexible board.
13
MZ-N520/N520CK
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.
2 In the normal mode, turn on the
[HOLD] switch. While press-
ing the [GROUP] 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 on the set.
While pressing the x CANCEL/CHG key on the set, press
the keys on the remote commander with the following order :
> t > t . t . t > t
. t > t . t t
Note: If electrical adjustment (CD and MO overall adjustment) has not
been finished completely, “NV Error” is displayed on LCD of the
set.
SECTION 4
TEST MODE
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 allo ws each indi vidual 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 SL803 (TEST) on the MAIN board with a solder bridge
(connect pin <zx. of IC801 to the ground). Then, turn on the power .
SL803
(TEST)
– MAIN Board (Side B) –
Microcomputer
version
display
All off
All lit
Set LCD display
V1.20000 8
• 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 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.
-- --
14
MZ-N520/N520CK
Configuration of Test Mode
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 press the[VOL +] key on the remote commander activates the manual mode where the LCD display as
shown below.
3. During each test, the optical pick-up moves outward or inward while the
> or . key is pressed for several sec-
onds 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).
Press the
xCHANCEL/CHG
key
[Manual Mode]
[Servo Adjustment]
[Audio Adjustment]
[Power Supply Adjustment]
[OP Alignment Adjustment]
[Overall Adjustment Mode]
[Sound Skip Check Result Display Mode]
[Key Check Mode]
[Test Mode $Display Check Mode%]
Press the
xCANCEL/CHG
key
Press the
.
key or press the
[VOL --]
key
on the remote commander.
Press the
ENTER N
or
[VOL +]
key
Press the
>
key
or press the
[VOL +]
key
on the remote commander.
[Electrical Offset Adjustment]
Power Supply Adjustment
Auto Item Feed
CD Overall Adjustment/
MO Overall Adjustment
[Self-Diagnosis Result Display Mode]
Press the
[GROUP]
key
Press the
[VOL --]
key
The key check quits, or open the upper panel
Press the
xCHANCEL/CHG
key
Press the
xCHANCEL/CHG
key
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
>
key
[Minor item switching]
[Adjusted value variation]
[Adjusted value write]
>
key: Unit place of item number
increase.
.
key:Unit place of item number
decrease.
X
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.
--
0 00 Manual
Set LCD display
15
MZ-N520/N520CK
5. The display changes a shown below each time the [END
SEARCH] key is pressed.
However in the power mode (item number 700’s), only the
item is displayed.
6. Quit the manual mode, and press the xCANCEL/CHG key to
return to the test mode (display check mode).
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).
item number
address adjusted value
• Address & Adjusted Value Display
Set LCD display
• Jitter Value & Adjusted Value Display
Set LCD display
• Block Error Value & Adjusted Value Display
Set LCD display
• ADIP Error Value & Adjusted Value Display
Set LCD display
• Focus Drive Value & Adjusted Value Display
Set LCD display
• Item Title Display
Set LCD display
C68S1B
0 11
0FEJ1B
0 11
063B1B
0 11
081A1B
0 11
000F1B
0 11
LrefPw
0 11
item number
jitter value adjusted value
item number
block error value
adjusted value
item number
ADIP error value
adjusted value
item number
focus drive value
adjusted value
item number
item title
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 activates
the self-diagnosis result display mode where the LCD display
as shown below.
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.
If the
[GROUP] key is pressed with this display , the LCD switc hes
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).
0 XX 1 ****
0 XX N ****
0 XX N1****
0 XX N2****
0 XX R_****
1
1
XX
: Error code
****
: Total recording time
0 XX 1 0000
history code
error display code
Total recording time
when error occurred
Set LCD display
16
MZ-N520/N520CK
• 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 [GROUP] 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)
• Description of Error Indication Codes
Problem Indication code Meaning of code Simple display Description
No error 00 No error --- No error
01
Illegal access target
Adrs Attempt to access an abnormal address
address was specified
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
11 TOC error TOC Faulty TOC contents
TOC error 12 Data reading error Data data could not be read at SYNC
13 TOC address error Tadr TOC address data error
Power supply system error 22 Low battery LBat Momentary interruption detected
31 Offset error Ofst Offset error
32
Focus error ABCD
ABCD Focus error ABCD offset error
offset error
Offset system error 33
Tracking error
TE Tracking error Offset error
Offset error
34
X1 tracking error
X1TE X1 tracking error Offset error
Offset error
35
MD DATA 2
MD2 MD DATA 2 disc error
disc error
36 Mirror error Mirr Mirror retry over
17
MZ-N520/N520CK
• Cause of Sound Skip Error
Cause of error Description of error
EIB Sound error correction error
Play
Stat Decoder status error
Adrs Address access error
BEmp Buffer is empty
BOvr
Buffer is full, and sounds were
dumped
Record
Bful
Buffer capacity becomes less,
and forcible writing occurred
Rtry Retry times over
4. T o quit the sound skip check result display mode and to return
to the test mode (display check mode), press the
xCANCEL/
CHG key.
• Setting Method of Key Check Mode
1. Set the test mode (see page 13).
2. Press the
[VOL -] key activates the key check mode.
3. When each key on the set and on remote commander is pressed,
its name is displayed on the set LCD. (Operated position is
displayed for 4 seconds after the slide switch is operated.
Example1: When the > key on the set is pressed:
Example2: When the u /ENT key on the remote commander
is pressed:
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 ENTERN key or [VOL+] key, and the playing or
recording sound skip result display mode becomes active respectively where the LCD displays the following.
3. When the
ENTERN key is pressed, total error count is dis-
played 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 [VOL+] key is pressed, the display in the record
mode appears.
When the [VOL +] 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
ENTERN key is pressed, the display in the play mode ap-
pears.
0 00 P**R**
0 00 EIB **
0 00 Stat**
0 00 Adrs**
0 00 BEmp**
0 00 ######
0 00 P**R**
0 00 BOvr**
0 00 Bful**
0 00 Rtry**
0 00 ######
P**R**
: Total play/record errors (hex.)
**
: Counter of sound skip check each item (hex.)
######
: 6-digit address where sound was skipped last (hex.)
Playing sound skip
result display
Recording sound skip
result display
000
Set LCD display
0 00 FF
Set LCD display
000 r P PUS
Set LCD display
0 00 P**R**
Total count of play
system errors (hex.)
Total count of record
system errors (hex.)
Set LCD display
18
MZ-N520/N520CK
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:
Example2: When the keys on the remote commander are con-
sidered as 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.
8 88 SET OK
Set LCD display
8 88 RMC OK
Set LCD display
19
MZ-N520/N520CK
2. Press the X key.
3. Press the
X key once more.
4. Press the xCANCEL/CHG key to quit the manual mode, and
return to the test mode (display check mode).
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).
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))
4. Press the X key
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.
Note1: BATT- terminal is not GND when AC adaptor is used.
Note2: Power supply adjustment auto item feed mode (page 25) is
available to perform the temperature Correction and Power
Supply Adjustment without entering the manual mode.
Note: In the case of the microcomputer version 1.200 or more, the
sequence 5. Adjustment required before Overall Adjustment is
unnecessary.
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).
SECTION 5
ELECTRICAL ADJUSTMENTS
Outline
• In this set, automatic adjustment of CD and MO can be per-
formed 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)
• 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)
r
2. Temperature Correction (item number: 015)
r
3. Power Supply Manual Adjustment
Manual Mode
r
4. Laser Power Check
r
5. Adjustment required before Overall
Adjustment
r
6. CD Overall Adjustment (item number: 031)
r
Overall Mode
7.
MO
Overall Adjustment (item number: 034)
r
8. RESUME Clear (item number 043)
r
Manual Mode
9. Rewriting the Patch Data
(at replacement of the MAIN board)
r
10. Rewriting the NV values
0 21 ***SCC
Set LCD display
0 21 ResOK?
Set LCD display
Set LCD display
Res***
0
21
Reset!
0
21
NV reset (after several seconds)
0 15 SetTmp
Set LCD display
--
20
MZ-N520/N520CK
• Adjustment Method of VC2_LOW
(item number: 743)
1. Connect a digital voltmeter to the TP1905 (VCOUT) on the
MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]
key (voltage down) so that the voltage becomes 2.30 ± 0.01V.
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 24)
• Adjustment Method of VC2_HIGH
(item number: 744)
1. Connect a digital voltmeter to the TP1905 (VCOUT) on the
MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]
key (voltage down) so that the voltage becomes 2.55 ± 0.01V.
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 24)
• Adjustment Method of VC1_LOW (PB)
(item number: 741)
1. Connect a digital voltmeter to the TP1928 (VCO1) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key (volt-
age down) so that the voltage becomes 2.35 ± 0.05V.
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 24)
• Adjustment Method of VC1_HIGH (REC)
(item number: 742)
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 v oltage becomes 2.50 ± 0.05V.
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 24)
digital
voltmete
r
MAIN board
TP1928 (VCO1)
TP1311 (GND)
digital
voltmeter
TP1905 (VCOUT)
TP1311 (GND)
MAIN board
digital
voltmete
r
MAIN board
TP1928 (VCO1)
TP1311 (GND)
7 41 A D * *
**
: Adjusted value
Set LCD display
7 42 A D * *
**
: Adjusted value
Set LCD display
7 43 A D * *
**
: Adjusted value
Set LCD display
digital
voltmeter
TP1905 (VCOUT)
TP1311 (GND)
MAIN board
7 44 A D * *
**
: Adjusted value
Set LCD display
--
--
--
--
21
MZ-N520/N520CK
• Adjustment Method of REG1
(item number: 745)
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.
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 24)
• Adjustment Method of REG3_LOW1
(item number: 747)
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 voltag e becomes 1.25 ± 0.01V.
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 24)
digital
voltmete
r
TP1909 (REGO1)
TP1311 (GND)
MAIN board
7 45 A D * *
**
: Adjusted value
Set LCD display
digital
voltmete
r
TP1907 (REGO3)
TP1311 (GND)
MAIN board
7 47 A D * *
**
: Adjusted value
Set LCD display
• Adjustment Method of REG3_LOW2
(item number: 748)
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.
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 24)
• Adjustment Method of REG3_HIGH
(item number: 749)
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 v oltage becomes 1.25 ± 0.01V.
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 24)
7 48 A D * *
**
: Adjusted value
Set LCD display
7 49 A D * *
**
: Adjusted value
Set LCD display
digital
voltmete
r
TP1907 (REGO3)
TP1311 (GND)
MAIN board
digital
voltmete
r
TP1907 (REGO3)
TP1311 (GND)
MAIN board
--
--
--
--
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