Sony Hi-MD Walkman MZ-NH1 User manual

SERVICE MANUAL
PORTABLE MINIDISC RECORDER
US Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
SPECIFICATIONS
MZ-NH1
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 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 (Refer
to page 94 for details)
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 3,600 rpm (CLV)
Error correction
Hi-MD:
LDC (Long Distance Code)/BIS (Burst
Indicator Subcode)
MD:
ACIRC (Advanced Cross Interleave Reed
Solomon Code)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz/44.1 kHz/48 kHz
Coding
Hi-MD:
Linear PCM (44.1 kHz/16 bit) — PCM
ATRAC3plus (Adaptive TRansform
Acoustic Coding 3 plus)
MD:
ATRAC
ATRAC3 — 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
1)
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-jack for optical
(digital) input
Outputs
i/LINE OUT
2)
: stereo mini-jack (dedicated
emote control jack)/194 mV (10 kΩ)
Maximum output (DC)
2)
Headphones:
5 mW + 5 mW (16 Ω)
Power requirements
Sony AC Power Adaptor connected at the DC
IN 6V jack:
120 V AC, 60 Hz (Models for USA, Canada,
Mexico, and Taiwan)
240 V AC, 50 Hz (Model for Australia)
230 V AC, 50 Hz (Models for U.K. and
Hong Kong)
220 V AC, 50 Hz (Model for China)
100 - 240 V AC, 50/60 Hz (Other models)
The recorder:
Lithium-ion rechargeable battery
LIP-4WM, 3.7 V, 370 mAh, Li-ion
Battery charging stand:
AC power adaptor DC 6V
Operating temperature
+5°C (+41°F) to +35°C (+95°F)
Hi-MD mode (When using a 60/74/80-
minute standard disc)
(Unit: approx.hours)(JEITA)
Battery life
4)
Hi-MD mode (When using a 1GB Hi-
MD disc)
(Unit: approx.hours)(JEITA
3)
)
When Linear
PCM Hi-SP Hi-LP
Recording
continuously 68.59.5
Playing
continuously 10 15.5 18
When Linear
PCM Hi-SP Hi-LP
Recording
continuously 589
Playing
continuously 8 14.5 17.5
Ver 1.1 2004.09
US and foreign patents licensed from Dolby
Laboratories. Model Name Using Similar Mechanism NEW
MD Mechanism Type MT-MZNH1-181
Optical Pick-up Name ABX-U
9-879-075-02
2004I05-1
© 2004.09
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
– Continued on next page –
•SonicStage and SonicStage logo are trademarks or registered trademarks of Sony Corporation.
•MD Simple Burner, OpenMG, “MagicGate”, “MagicGate Memory Stick”, “Memory Stick”, Hi-
MD,NetMD,ATRAC,ATRAC3,ATRAC3plusandtheirlogos are trademarksofSonyCorporation.
•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.
•Pentium is a trademark or registered trademark of Intel Corporation.
•All other trademarks and registered trademarks are trademarks or registered trademarks of their
respective holders.
For other Service and User Manuals, go to www.ManualDepot.com

2
MZ-NH1
Dimensions
Approx. 81.7 ×76.1 ×14.8 mm (w/h/d)
(3
1
/ 4 ×3 ×
19
/ 32 in.) (excluding projecting parts
and controls)
Mass
Approx. 97 g (3.4 oz) (the recorder only)
Approx. 107 g (3.8 oz) (including the
rechargeable battery)
1)
The LINE IN (OPT) jack is used to connect
either a digital (optical) cable or a line
(analog) cable.
2)
The i/LINE OUT jack connects either
headphones/earphones or a line cable.
Design and specifications are subject to change
without notice.
Your dealer may not handle some of the above
listed accessories. Please ask the dealer for
detailed information about the accessories in
your country.
When using optional headphones, use only
headphones/earphones with stereo mini
plugs. You cannot use headphones/
earphones with micro plugs.
4)
When using a 100% fully charged lithium-ion
rechargeable battery
3)
Measured in accordance with the JEITA
(Japan Electronics and Information
Technology Industries Association) standard.
On power sources
Use house current or rechargeable battery.
For use in your house: For the supplied battery
charging stand, use the AC power adaptor
supplied with this recorder. Do not use any
other AC power adaptor since it may cause the
recorder to malfunction.
Polarity of the plug
MD mode (Unit: approx.hours)(JEITA)
When SP
Stereo LP2 Stereo LP4 Stereo
Recording
continuously 81010.5
Playing
continuously 14.5 17 18.5

3
MZ-NH1
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Bottom Panel SubAssy ................................................... 7
3-3. MAIN Board.................................................................... 8
3-4. Upper Panel Sub Assy ..................................................... 8
3-5. Control Ornament Block ................................................. 9
3-6. Mechanism Deck Assy (MT-MZNH1-181) .................... 9
3-7. Gear (SA), Gear (SB) ...................................................... 10
3-8. Op Service Assy .............................................................. 10
3-9. DC SSM18D/C-NP Motor (Spindle) (M701),
DC SSM21A/C-NP Motor (Sled) (M702),
DC Motor Unit (Over Write Head Up/Down) (M703) ... 11
3-10. Holder Assy ..................................................................... 11
4. TEST MODE ............................................................... 12
5. ELECTRICAL ADJUSTMENT ............................. 16
6. DIAGRAMS
6-1. Block Diagram –MD SERVO Section – ......................... 21
6-2. Block Diagram –AUDIO Section –................................. 22
6-3. Block Diagram –POWER SUPPLY Section – ................ 23
6-4. Schematic Diagram –MAIN Section (1/9) – ................... 25
6-5. Schematic Diagram –MAIN Section (2/9) – ................... 26
6-6. Schematic Diagram –MAIN Section (3/9) – ................... 27
6-7. Schematic Diagram –MAIN Section (4/9) – ................... 28
6-8. Schematic Diagram –MAIN Section (5/9) – ................... 29
6-9. Schematic Diagram –MAIN Section (6/9) – ................... 30
6-10. Schematic Diagram –MAIN Section (7/9) – ................... 31
6-11. Schematic Diagram –MAIN Section (8/9) – ................... 32
6-12. Schematic Diagram –MAIN Section (9/9) – ................... 33
6-13. Printed Wiring Board –MAIN Section (1/2) – ................ 34
6-14. Printed Wiring Board –MAIN Section (2/2) – ................ 35
7. EXPLODED VIEWS
7-1. PANEL SECTION........................................................... 49
7-2. MAIN SECTION ............................................................ 50
7-3. MECHANISM DECK SECTION................................... 51
8. ELECTRICAL PARTS LIST................................ 52
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.
CAUTION
Use of controls or adjustments or performance of procedures
otherthan thosespecifiedhereinmayresult inhazardous radiation
exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0ON 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.

4
MZ-NH1
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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
SECTION 1
SERVICING NOTES
– MAIN Board (Conductor Side) –
SL894
(OPEN/CLOSE)
Installing
Providing the required system environment
The following system environment is required in order to use the SonicStage/MD Simple
Burner software for the MD Walkman.
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
We do not ensure trouble-free operation on all computers that satisfy 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 hibernation function on all
computers.
For Windows 2000 Professional users, install Service Pack 3 or later version before using 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 amount space will vary according to Windows
version and the 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 Edition/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
Windows Media Player (version 7.0 or higher) installed for playing
WMA files
Notes
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free 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.
OPERATION CHECK WHEN THE MAIN BOARD IS
REMOVED
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.

5
MZ-NH1
SECTION 2
GENERAL This section is extracted from
instruction manual.
Looking at controls
The recorder
Ax(stop) • CANCEL button
BDisplay window
COPEN switch
DBattery compartment
E5-way control key
FMENU button
GGROUP button
HT MARK button
IX(pause) button
JzREC (record) switch/lamp
KLINE IN (OPT) jack
LMIC (PLUG IN POWER) jack
There is a tactile dot beside the MIC
(PLUG IN POWER) jack.
Mi(headphones/earphones)/LINE
OUT jack
NUSB connecting jack
1
2
3
4
8
5
6
7
9
0
qa
qs
qd
qf
qg
qh Operation Function
Press NENT
1)
play, enter
Press towards
FR find the beginning of the previous
track, rewind
Press towards
FF find the beginning of the next track,
fast forward
Press towards
VOL +
1)
or
VOL –.
volume
1)
There are tactile dots beside the
N ENT and VOL + buttons.
OHOLD switch (at the rear)
Slide the switch in the direction of the
arrow to disable the buttons on the
recorder. To prevent the buttons from
being accidentally operated when you
carry the recorder, use this function.
PCHG (Charge) lamp
The display window of the recorder
ADisc indication
Shows that the disc is rotating for
recording or playing.
BBattery indication
Shows the approximate remaining
battery power. If the rechargeable
battery is weak, the indication
becomes empty and starts flashing.
CSYNC (synchro-recording) indication
DREC indication
Lights up during recording or file
transfers from the computer. When
flashing, the recorder is in record
standby mode.
EGroup indication
FHi-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.
GTrack number display
H“R” (Remain) indication
Lights up when remaining recordable
time is displayed.
ICharacter information display
Displays the menu items, date, error
messages, etc.
JTrack mode (PCM, Hi-SP, Hi-LP, SP,
LP2, LP4, MONO) indication
KLevel meter
12345 6 7 8
9
qa0

6
MZ-NH1
The headphones/earphones with a remote control
ADisplay window
BJog lever (NX • ENTER, .,
>)
CClip
Dx(stop) • CANCEL button
EVOL +, – buttons
FHOLD switch
Slide the switch in the direction of the
arrow (a yellow mark appears) to
disable the buttons on the remote
control. To prevent the buttons from
being accidentally operated when you
carry the recorder, use this function.
G•DISPLAY, BACKLIGHT button*
H•P-MODE, REPEAT button*
I•SOUND, SOUND SET button*
JJog dial (•NAVI/ MENU/ENTER)*
*•indicates a function that requires a slight
press of the button. indicates a function
that requires pressing the button for 2 seconds
or more.
1
2
3
4
50
9
8
7
6
Operation Function
Press NX •
ENTER play, pause, enter
Slide towards
.cue to the beginning of the previous track,
rewind
Slide towards
>cue to the beginning of the next track, fast
forward
Using the clip for the remote control
.
The display window of the remote control
ACharacter information display
BBattery level indication
CDisc indication
DSND (sound), SUR (surround)
indications
123
4
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, turn the clip in the opposite direction until it attaches firmly,
as shown below.

MZ-NH1
7
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. BOTTOM PANEL SUB ASSY
(Page 7)
3-3. MAIN BOARD
(Page 8) 3-4. UPPER PANEL SUB ASSY (Page 8)
3-6. MECHANISM DECK ASSY (MT-MZNH1-181)
(Page 9)
3-7. GEAR (SA), GEAR (SB)
(Page 10)
3-8. OP SERVICE ASSY
(Page 10)
3-9. DC SSM18D/C-NP MOTOR (SPINDLE) (M701),
DC SSM21A/C-NP MOTOR (SLED) (M702),
DC MOTOR UNIT(OVER WRITE HEAD UP/DOWN) (M703)
(Page 11)
3-10. HOLDER ASSY
(Page 11)
3-5. CONTROL ORNAMENT BLOCK
(Page 9)
SET
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.
S895
Note: When installing the bottom pane
l
sub assy, adjust the position of
switch (S895) and knob (hold).
3 bottom panel sub assy
2 two screws
(M1.4) L=1.6
knob (hold)
1 two screws
(M1.4) L=1.6
Note: Follow the disassembly procedure in the numerical order given.
3-2. BOTTOM PANEL SUB ASSY

MZ-NH1
8
3-4. UPPER PANEL SUB ASSY
B
A
5
two screws (M1.4) L=1.6
6 upper panel sub assy
4 two screws
(M1.4) L=1.6
3 screw (M1.4) L=3.0
1 flexible boar
d
(CN471)
2 Slide the lever (lock) in the direction of arrow A ,
and open the upper panel sub assy in the direction of arrow B .
3-3. MAIN BOARD
1 sheet (shield A)
7 leaf spring
(EMC) (1)
8 toothed lock screw
(M1.4)
9 leaf spring
(EMC) (2)
q; MAIN board
4 two flexible boards
(CN471, 701)
2 Remove two solders.
3 flexible cable
4 flexible board
(CN491)
5 three toothed loc
k
screws (M1.4)
4 flexible board
(CN501)
6 toothed lock screws (M1.4)

MZ-NH1
9
3-5. CONTROL ORNAMENT BLOCK
6
A
1
Open the battery case lid.
3 two screws
(M1.4) L=2.5
2 battery case lid.
8 control ornament bloc
k
7 flexible board
(CN491)
4 two claws
5 claw
4 claw
3-6. MECHANISM DECK ASSY
(MT-MZNH1-181)
1 two step screws
(MD)
2 mechanism deck assy
(MT-MZNH1-181)
3 battery case

MZ-NH1
10
3-8. OP SERVICE ASSY
1 Lead screw block assy is turned
and it removes from OP service assy.
2 OP service assy
3-7. GEAR (BSA), GEAR (SB)
1 self tap screw
2 thrust retainer spring
3 washer (0.8-2.5)
4 gear (SA)
5 gear (SB)

MZ-NH1
11
3-9. DC SSM18D/C-NP MOTOR (SPINDLE) (M701), DC SSM21A/C-NP MOTOR (SLED) (M702),
DC MOTOR UNIT (OVER WRITE HEAD UP/DOWN) (M703)
3 two screws (M1.4)
4 DC SSM21A/C-NP motor (sled)
(M702)
1 Remove four solders of flexible board.
2 Remove two solders of flexible board.
6 three self tap screws
7 DC SSM18D/C-NP motor
(spindle) (M701)
5 motor base assy
9 DC motor unit
(over write head up/down)
(M703)
8 self tap screw
3-10. HOLDER ASSY
4 Remove the holder assy
to the direction of the arrow
A .
3 Open the holder assy.
1 boss
2 boss
A

12
MZ-NH1
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_NH1_NH3D_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_NH1_NH3D_Ver***.exe”.
3. Insert the fully charged lithium-ion battery (LIP-4WM).
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 lithium-ion battery.
Screen of the PC application “TestMode_Enter_For_NH1_NH3D_
Ver***.exe”
(“***” is version number)
Note: Once the test mode is activated 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.
SECTION 4
TEST MODE
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.
•When the xkey is pressed and hold down, the display at that
time is held so that display can be checked.
Display check mode:
• Display of the main unit
• Display of the remote commander
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_NH1_NH3D_Ver***.exe”.
3. Insert the fully charged lithium-ion battery (LIP-4WM).
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 lithium-ion battery.
All lit
All off
Microcomputer
version
display
001
Ver *.***
All lit
All off
Microcomputer
version display
Ver *.***

13
MZ-NH1
4. CONFIGURATION OF THE TEST MODE
Flow of the test mode:
5. MANUAL MODE
This is mode to adjust or check the operation of the set by function.
Operation ofThe 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 of the remote commander
3. During each test, the optical pick-up moves outward or inward
while the [FF] or [FR] key is pressed for several seconds
respectively.
4. Eachtest itemis assignedwith afour-digititem 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 non-
volatile memory (for the items where adjustment was made).
5. To quit the Manual mode, press the xkey and return to the
Display Check mode.
Flow of manual mode operation:
Display Check Mode
Version display
→ All lit
→ All off → Version display...
[VOL +] key
x
key
x
key
N ENT
key
x
key
[FF] key
x
key
[T MARK] key
[GROUP] key
[VOL --] key
x
key
Open the lid
Manual Mode
Sound Skip Check Result
Display Mode (Play)
Self-Diagnosis Result Display Mode
Sound Skip Check Result
Display Mode (REC)
Key Check Mode
Overall Adjustment Mode
Key Count Mode
[MENU] key
[FF] or [FR] key
(press a few seconds)
(Not used in servicing)
001
Ver *.***
000
Manual
000
AdjF**
000
10
000
1 0000
000
P00r00
000
p00R00
000
MENU 000
Number of 1000th place
(000 to 009)
000
Manual
x
key
[FF] key
[FF] key
[FF] key
Top item switching
Major item switching
x
key
[VOL +] key: 1000th place of item
number increase.
[VOL --] key: 1000th place of item
number decrease.
[VOL +] key: 100th place of item
number increase.
[VOL --] key: 100th place of item
number decrease.
Medium item switching
x
key
[VOL +] key: 10th place of item
number increase.
[VOL --] key: 10th place of item
number decrease.
[FF] key: 1st place of item
number increase.
[FR] key: 1st place of item
number decrease.
Minor item switching
[VOL +] key: Increases the adjusted
value.
[VOL --] key: Decreases the adjusted
value.
Adjusted value variation
Adjusted value write
key: Adjusted value is written.
X

14
MZ-NH1
6. OVERALL ADJUSTMENT MODE
6-1. Operation ofThe Overall Adjustment Mode
1. Enter the test mode (Display Check mode).
2. Press the [VOL--] key to activate the OverallAdjustment mode
where the LCD displays as shown below.
Display of the remote commander
Disc mark:
Lit the inner segments: Completed the power supply adjustment.
Lit the outer segments: Completed the check of charge function.
“**”:
If “DF” or “FF” is displayed, it mean that completed the servo
overall adjustment.
3. To quit the Overall Adjustment mode, press the xkey and
return to the Display Check mode.
Flow of overall adjustment mode:
***
$$####
000
AdjF**
Overall Adjustment Mode
x
key
x
key
x
key
x
key
[FF] key
[FR] key
(rotation)
x
key
[T MARK] key
[GROUP] key
CD Overall Adjustment Mode
Optical Pick-up Operation
Check Mode
Stray Light Offset Overall
Adjustment Mode
Initialize The Adjustment Values
Hi-MD3 Overall Adjustment Mode
MD1 Overall Adjustment Mode
[VOL +] key
[VOL --] key
x
key
000
AdjF**
***
CD Run
***
MD1Run
***
HM3Run
***
OfsRun
000
OPChk
911
ResOK?
6-2. Error Message inThe Overall Adjustment Mode
In the OverallAdjustment mode, if an error occurred, it displays as
following table.
Display Description
Close! Dose not close the lid
DfDis! Unsuitableness disc was inserted
NoChg! Does not finish the check of charge function yet
NoTmp! Does not setting the temperature correction value
NotCD! Does not complete the CD Overall adjustment beforethe
MD1 Overall adjustment
NotM1! Does not complete the MD1 Overall adjustment
before the Hi-MD3 Overall adjustment
NotH3! Does not complete the Hi-MD3 Overall adjustment
before the Stray Light Offset Overall adjustment
****NG Error of item number “****”
7. 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 self-
diagnosis result display mode, you can determine when the error
occurred.
Clear the total recording time, if the optical pick-up was replaced.
7-1. Operation ofThe Self-Diagnosis Result Display
Mode
1. Enter the test mode (Display Check mode).
2. Press the [FF] key toactivatethe Self-DiagnosisResultDisplay
mode where the LCD displays as shown below.
Display of the remote commander
3. To quit the Self-Diagnosis Result Display mode, press the x key
and return to the Display Check mode.

15
MZ-NH1
8. KEY CHECK MODE
This mode is used for key check.
Operation ofThe Key Check Mode
1. Enter the test mode (Display Check mode).
2. Press the [GROUP] key to activate the Key Check mode where
the LCD displays as shown below.
Display of the remote commander
“*”:Remote commander (0: with, 4: without)
“$$$$$$”:Pressed key name.
When remote commander key is pressed, display becomes
as “r$$$$$”.
Whenthe jog dial isturned, itdisplays “JOG+ X”or “JOG-
X” (“X” is number of 1 to 3). If the jog dial is turned four
click, it displays “JOG+OK” or “JOG-OK”.
“##”:Key voltageof remotecommander. (Hexadecimalnumber)
3. When all keys check is OK on the main unit, it displays as
follows.
Display of the remote commander
When all keys check is OK on the remote commander, it
displays as follows.
Display of the remote commander
*) Turn the jog dial four click upside and downside to jog test is OK.
4. When all keys check are OK both the main unit and the remote
commander, it display backs to the Display Check mode
automatically.
5. To quit the Key Check mode, open the lid and return to the
Display check mode.
The first error
[VOL +] key
[VOL --] key
The last error
One error before
the last
Two error before
the last
Total recording time
***
1 ####
***
N ####
***
N1####
***
N2####
***
R_####
[VOL +] key
[VOL --] key
[VOL +] key
[VOL --] key
[VOL +] key
[VOL --] key
[VOL +] key
[VOL --] key
Flow of Self-diagnosis Result Display mode operation:
7-2. Error Code ofThe Self-Diagnosis Result Display
Mode
Error code Description
00 No error
01 Attempt to access an abnormal address
02 High temperature detected
03 Focus error (no change)
04 Abnormal rotation of disc
05 Fault of disc discriminate
06 Error of access loop (no change)
07 Error of access loop (with change)
08 Could not read address
09 Focus error (with change)
12 Could not read data with SYNC
13 TOC address data error
32 Focus error, ABCD offset error
33 Tracking error, offset error
34 Tracking error, X1 tracking error, offset error
7-3. ClearTheTotal RecordingTime
After replacing the optical pick-up, clear the total recording time.
1. Enter the test mode (Display Check mode).
2. Press the [FF] key toactivatethe Self-DiagnosisResult Display
mode.
3. Press the [VOL--] key once to display the total recording time
indication.
4. Press the Xkey and display “ClrOK?”.
5. Press the Xkey again to display “RecT 0” and clear the total
recording time.
11*
$$$$$$ ##
888
SET OK ##
888
RMC OK ##

16
MZ-NH1 SECTION 5
ELECTRICAL ADJUSTMENTS
1. PRECAUTIONS FOR ADJUSTMENT
1. Adjustmentmust bedone in thetest modeonly.Afteradjusting,
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 “Setting TheTemperature Correction
Value”)
•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 andAC adapter in accessories
•Lithium-ion battery (LIP-4WM) in accessories
(full charged)
•PC application software for test mode
“TestMode_Enter_For_NH1_NH3D_Ver***.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, use the AC adaptor and battery
charging stand in accessories.
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. ADJUSTMENT OF THE EACH ITEM
3-1. EnteringTheTest 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 Xkey to display “911 Reset!” and initialize the
adjustment values.
4. Press the xkey and back to Display Check mode.
3-3. SettingTheTemperature CorrectionValue
Procedure:
1. In the test mode (Display Check mode), press the [VOL+] key
to enter the Manual mode.
2. Press the [FF] key twice, and press the [VOL+] key twice to
display as follows.
Display of the remote commander
3. Press the [FF] key once to select the item number 0131 and
display as follows.
Display of the remote commander
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 Xkey to write the adjusted value.
7. Press the xkey four times and back to the Display Check
mode.
3-4. Power SupplyVoltage Adjustment
Adjustment must be done with the following order.
3-4-1. Setting
Procedure:
1. Apply the voltage of 3.7V to the battery terminals, and enter
the test mode (Display Check mode).
2. Press the [VOL+] key to enter the Manual mode.
3. Press the [VOL+] key twice to display as follows.
Display of the remote commander
4. Press the [FF] key once, press the [VOL+] key once, and press
the [FF] key once again to display as follows.
Display of the remote commander
5. Repeat the next procedures (3-4-2. PwrAdjAdjustments), and
adjust all contents of “table 3-4-1. PwrAdj Specifications”.
130
Temp
131
SetTmp **
adjustment value (hexadecimal)
002
POWER
210
PwrAdj
Ver 1.1

17
MZ-NH1
3-4-2. PwrAdj adjustments
Repeat the following procedures and adjust all contents of “table 3-
4-1. PwrAdj Specifications”.
Example Display (Item No.2211)
Procedure:
1. Connect the digital voltmeter to measuring point (refer to the
following table) and ground (CL433).
2. Press the [FF] 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 Xkey to write the adjusted value.
5. Press the [FF] key to select the next item.
6. Repeat adjustment from step 1 until item number 2233.
ItemNo. Display Specification value Measuring point
2211 211 VC1 ** 2.05V +0.02V CL8003
2212 212 VC1H N ** 2.25V ±0.01V CL8003
2213 213 VC2 ** 1.20V +0.01V CL603
2214 214 DDC3 L ** 2.60V ±0.015V CL604
2215 215 DDC3 H ** 3.10V ±0.015V CL604
2216 216 REG1 L ** 2.32V ±0.02V CL362
2217 217 REG1 H ** 3.02V ±0.02V CL362
2218 218 REG2 1 ** 2.27V ±0.02V CL509
2219 219 REG2 2 ** 2.47V ±0.02V CL509
2221 221 REG2 3 ** 2.72V ±0.02V CL509
2222 222 REG2 4 ** 2.97V ±0.02V CL509
2223 223 REG3 ** 2.52V ±0.02V CL516
2224 224 VREC 1 ** 0.89V ±0.02V CL624
2225 225 VREC 2 ** 1.08V ±0.02V CL624
2226 226 VREC 3 ** 1.52V ±0.02V CL624
2227 227 VREC 4 ** 2.27V ±0.02V CL624
2228 228 VREC 5 ** 2.97V ±0.02V CL624
2229 229 VREC 6 ** 0.94V ±0.02V CL624
2231 231 VREC 7 ** 1.28V ±0.02V CL624
2232 232 VREC 8 ** 2.57V ±0.02V CL624
2233 233 VREC 9 ** 2.57V ±0.02V CL624
Note1: “**” is adjustment value (hexadecimal number).
Note2: Ground point of all measuring points is CL433.
Table 3-4-1. PwrAdj Specifications
211
VC1 **
adjustment value (hexadecimal)
R518R512
R517
R519
C550
C545
C547
C528
C525
R502 R501
C574
C517 C516 C515 C511
C533
C531
R504 R503
C557
R526 R561
R883
R958
R952
R940 C927
R923 R922
C926
C954
R914
R908 R910
C901
R902
R944 R941
R931
R924
C929 C928
R917 R918
C957
R882
R894
R885
R884
C890
C845
C503
R809 R863
R657
C660
C701C710
C716
C324
R314
C314
R313
R926
C920
R929
R933
R925
C201
C101
FB301
C714
R610 R619
R310 R309
C709 C708 C707
C706
C322
R103
R101
FB101
R947
R946
FB201
R307 C308 R106
R203
R201
R937
R938
R939
R927
R934
R936
R935
C319
R633R650
R609
C705
C702 C703
R315
C820
R507
C560
C568
R508
C569
C538
C559
R509
C555
R524 R520
C526
R511
S892
(HALF LOCK)
C565
C566
C554
R505
C536
C537 C539
C530 C524
R525
R510
FB503
C561
C434
C942
C328
FB302 FB202
C647
C327
C934
C906
L904
C931
C941
L903
C918
C562
FB502
FB803
R636
R637
R641
R642
C643
R402
C370
C368
FB355
FB354
FB353
FB357
FB251
FB151
FB351
C367
C351
R638
R635
L803
C879
C880 L804
L802
L870
R833 R850
FB809 FB810 FB802
FB807
R608
C805
FB808
C628
L303
C202
C102
C938
C936
C919 C905
C713
R308
C412
C364
C354 C365
FB102
C360
C634
L507
Q504
BCE
C567 +
C564 +
C570 +
C553
+
C518
+
C556
+
L506
L502
L503
L505
L504
L801
L501
C552
C529
C527
C522
C513
C519
C523
IC501
C558
C520
R516
C575
C894
C433
C431
R957
R953
R945
R956
R954
C903
C925
C902
C917
R904
R907
R912
R906
R903
C932
R515
R513
R514
C521
D501
KA
Q501
Q503
BCE
Q502
E
C
B
C573
C835
C852
R860
R888
C888
R887
R890
C884
R886
R864
CN501
D803
IC891
IC801
IC601
IC401
IC351
IC871
IC873
AK
R893
R868
X872
R846
R493
R492
R491
R827
R865 R858
R810
R861 R854
C826
C825
C851
C822
C811
C892
R813
C821C855
X802
R706
R640
R656
R617
C642
C641
R616
R404
R455
R604
R418
C410
R354
C407
C415
R355
C311
R356
C352
R352
C252
C306
R416
R363
R364
C205
C105
C204
C104
R808
C602
C625
R458
R453
R459
R456
R431
R471
R475
CN471 R474
R473
C406
R407
C457
C460
C630C636
C804 C861
C604 C662
C626
R872
R867
C891
C847
R876
C881
C877C878
C871
C849
R802
C873
R895
C827
R870
C810
R866 R848
C823
C629
R855
C801
C802
C814
R832
C455 C452
R663
C453
C456
C432
R360
R401
C401
R417
C405
R351
R154
C152
R254
C151
R151
R251
C251
C404
C803
C839
R856
C624
C712
R707
R658
R629
C644R654
R628
R405
C645
C638
R357
C206
R207 R206
C307
R358
R353
C106
R107
R361
R415
C409
C408
C715 C717
FB501
SL803
SL801
C874 +
D801
KA
X801
FB801 CN491
Q803
BCE
D491
AK
C819 +
C617 +
C321 +
C207 +
C107 +
C313 +
C316 +
C924 +
C909 +
C910 +
C911 +
C912 +
C913 +
C612 +
C838
+
C836
+
C622
+
IC804
IC604
IC701
IC872
IC605
IC302
IC901
D871
AK
D611
KA
Q802
BP801
D884
KA
Q884 Q882
Q883
IC502
D883
D881
D882
KA
AK
AK
1
2
4
3
IC881
IC902
3
4
2
1
Q881
BCE
SL892
S895
SL891
L902 L901
C818 +
3
4
2
1
1
2
43
1
2
4
3
+C615
+C632
+C635
+C359 +C358
+C357
+C312
+C355
+C361
+C614
+C613
+C856
D601
AK
D610
AK
D609
KA
C816 +
D618
KA
D617
KA
D603
KA
D616
KA
FB454
FB451
FB453
D456
KA
K
A
K
D451
CN701
RB701
IC903
43
12
C914 +
Q951
RB702
BP701
C323 +
C315 +
C916 +
C318 +
C362 +
C310 +
C637 +
C402
R403
+
C356
F351
+
C403 +
D455
Q431
AK
D431
AK
S
D
G
BP471
Q352
BCE
Q151
Q351
BCE
Q251
BCE
Q405
Q607
C320
+
C108
+
C208
+
Q404
Q606
BCE
BP351
D614
KA
1
7
21
15
814
2822
1
1
14
42
29
28 15
43 56
7
2115
8
14
28
22
IC301
+C955
+C948
+C939
+C949
+C922
+C940
SL901
+C952 +C951
D904
AK
D906
KA
D903
AK
D901
AK
D902
KA
BP352
BP312
15
1511
10
6
16
20
C325
GDS
SL894
2D
1G
1S
2S
2G
1D
2C
1B
1E
2E
2B
1C
1C
2B
2E
1E
1B
2C
D
D
S
D
D
G
26
1
1
1
8
1
4
6
12
10
3
97
34
5
13
54
OFF ON
HOLD
LITHIUM-ION
RECHARGEABLE BATTERY
LIP-4WM
1C 2B 2E
1E 1B 2C
1
117
33 49
18
32
64
50
216
4834
3
54
1
110
3
54
1C
GDD
SDD
2B
2E
1E
1B
2C
1C
2B
2E
1E
2G2D
2S2D
1G1D
1S1D
1B
2C
111
CL451
(DC IN 6V)
CL453
(VBUS 5V)
CL460
(VBUS GND) CL433 (GND)
CL362
CL604
CL624
CL603
CL509
CL516
CL8003
CL935
CL8007
Adjustment Location:
– MAIN BOARD –
(Conductor Side)

18
MZ-NH1
3-4-3. VBsAdj adjustments
Procedure:
1. In the “3-4-2. PwrAdj Adjustments” completed status, press
the [FF] key to display as follows.
Display of the remote commander
2. Apply the voltage of 5V to the CL453 (VBUS 5V) and CL460
(VBUS GND).
3. Press the [FF] key to change the item number to 2241.
4. Adjust with [VOL+]/[VOL--] keys so that the value of digital
voltmeter becomes specification value. (refer to “table 3-4-2.
VBsAdj Specifications”)
5. Press the Xkey to write the adjusted value.
6. Press the [FF] 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 REG4 ** 1.13 V ±0.01 V CL603
2242 242 REG5 ** 2.05 V + 0.02 V CL8003
2243 243 REG6 ** 3.30 V ±0.01 V CL8007
Note1: “**” is adjustment value (hexadecimal number).
Note2: Ground point of all adjustment points is CL433.
Note3: Refer to page 17 for adjustment location.
Table 3-4-2.VBsAdj Specifications
7. Press the [FF] 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 4.10 V (− 0.02 V).
9. Press the Xkey to write the adjusted value.
10. Apply the voltage of 3.7 V to the battery terminal again.
11. Press the xkey 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 xkey three times and back to the Display Check
mode.
3-5. Charge Function Check
Note1: Whenperform this check, don’t apply a voltage to battery terminals.
Note2: Be sure to disconnect theAC adapter when connecting the resistors.
Doing so with the power supply connected causes a trouble.
Procedure:
1. Connect the 10 ohms resistor (more than 3 watts) to battery
terminals.
2. Connect the AC adapter to the battery charging stand in
accessories and set the main unit.
3. Enter the test mode (Display Check mode).
4. Press the [VOL+] key once to enter the Manual mode.
5. Press the [VOL+] key twice, press the [FF] key once, press the
[VOL+] key once, press the [FF] key once, press the [VOL+]
key twice to display as follows.
Display of the remote commander
6. And [FF] key once again to select the item number 2251 and
display “251 ChgChk **” on the LCD of remote commander.
7. Press the Xkey confirm that “ChgCOK” is displayed.
8. Press the xkey four times and back to the Display Check
mode.
9. Cut the power supply and remove the resistor that connected
to the battery terminals.
3-6. Laser Power Check
Procedure:
1. In the test mode (Display Check mode), press the [VOL+] key
to enter the Manual mode.
2. Open the lid and press the [FR] key continuously until the
optical pick-up moves to the most inward track.
3. Setthe laserpowermeter sothat the laserbeam fromthe optical
pick-up aims at the objective lens of laser power meter at right
angle.
4. Press the [VOL--] key once to display as follows.
Display of the remote commander
5. Press the [FF] key three times to select the item number 9111
and display as follows.
Display of the remote commander
6. Confirm that the value of laser power meter is 0.67 mW ±
21%.
7. Press the [FF] key to select the item number 9112.
8. Confirm that the value of laser power meter is 0.76 mW ±
18%.
9. Press the [FF] key to select the item number 9113.
10. Confirm that the value of laser power meter is 6.25 mW ±
12%.
11. Press the xkey four times and back to the Display Check
mode.
240
VBsAdj
250
ChrgLi
009
DESIGN
111
LrefPw **

19
MZ-NH1
3-7. Setting The Adjustment Values
3-7-1. Hi-MD3 setting
Preparation:
1. Perform calculation every item based on the data given by the
Hi-MD3 adjustment disc by referring to the following table.
(Round off the value in decimal place)
2. Convert the calculated value into hexadecimal number.
Note: The Hi-MD3 adjustment parameters vary depending on the disc,
and therefore use the parameters of the disc used when performing
the adjustment.
Item No. Calculating formula (*3)
0211 Pr_nominal / 0.05
(*1) Por / 0.05
0212 Kr ×(−100)
0213 Pw_nominal / 0.05
(*2) Ppw / 0.05
0214 Kw ×(−100)
0215 Prmin / 0.05
0216 Pwmin / 0.05
*1) If the “Pr_nominal” value is indicated, use the “Pr_nominal” value
and not used “Por” value.
*2) If the “Pw_nominal” value is indicated, use the “Pw_nominal” value
and not used “Ppw” value.
*3) Round off after the decimal point.
Table 3-7-1. Hi-MD3 adjustment parameter
Example of Calculation:
Item No. Parameter Result
Decimal Hexadecimal
0211 Pr_nominal 2.50 mW 50 32h
0212 Kr −0.3 %/°C30 1Eh
0213 Pw_nominal 7.35 mW 147 93h
0214 Kw −0.4 %/°C40 28h
0215 Prmin 1.9 mW 38 26h
0216 Pwmin 5.8 mW 116 74h
Procedure:
1. In the test mode (Display Check mode), press the [VOL+] key
to enter the Manual mode.
2. Press the [FF] key once, press the [VOL+] key once, and press
the [FF] key once again to display as follows.
Display of the remote commander
3. Press the [FF] key once to select the item number 0211.
4. Adjust with [VOL+]/[VOL--] keys so that the adjustment value
of LCD becomes calculated value.
5. Press the X key to write the adjusted value.
6. Press the [FF] key to next item.
7. Repeat adjustment from step 4 until item number 0216.
3-7-2. Other setting
1. In the test mode (Display Check mode), press the [VOL+] key
to enter the Manual mode.
2. Press the [FF] key five time to select the item number 0113
and display as follows.
Display of the remote commander
3. Press the [VOL+]/[VOL--] key and set the according value to
each model type and destination referring to the following
table.
4. Press the X key to write the adjusted value.
Destination Setting value
US, Australian 01
AEP, UK 81
E18, Hong Kong, Taiwan,
Korean, Chinese, Tourist 05
•Abbreviation
E18: 100V - 240V AC area in E model
Table 3-7-2. ModeType and Destination Setting
3-8. Servo Overall Adjustment
Note1: Be sure to adjustment so that the set is horizontal and the LCD is
upside. Unless performed in that state, it is not adjusted correctly.
Note2: If NG is displayed in the middle of this adjustments, perform “3-2.
Initialize TheAdjustmentValue” and “3-7. SettingTheAdjustment
Values” again, then retry this adjustments from step 1.
Procedure:
1. Insert the full charged lithium-ion battery (LIP-4WM)
and enter the test mode (Display Check mode).
2. Press the [VOL--] key to enter the Overall Adjustment mode.
3. Insert the CD adjustment disc (TDYS-1).
4. Put the main unit horizontal so that the LCD becomes upside,
and press the [FR] key.
5. Wait until “CD OK” is displayed on the LCD.
6. Insert the MD1/HiMD1 hybrid adjustment disc
(MDW-74/GA1).
7. Put the main unit horizontal so that the LCD becomes upside,
and press the [FF] key.
8. Wait until “MD1 OK” is displayed on the LCD.
9. Insert the Hi-MD3 adjustment disc (HMD1GSDJ).
10. Put the main unit horizontal so that the LCD becomes upside,
and press the [VOL+] key.
11. Wait until “HMD OK” is displayed on the LCD.
12. Eject the disc.
13. Put the main unit horizontal so that the LCD becomes upside,
and press the [VOL--] key.
14. Wait until “OfstOK” is displayed on the LCD.
15. Press the xkey and back to the Display Check mode.
210
PwrAdj
113
DistF **
adjustment value (hexadecimal)

20
MZ-NH1
3-9. Resume Clear
Procedure:
1. In the test mode (Display Check mode), press the [VOL+] key
to enter the Manual mode.
2. Press the [VOL+] key once, press the [FF] key once, press the
[VOL--] key once, press the [FF] key once, and press the [VOL+]
key twice, press the [FF] key three times to select the item
number 1933.
3. Press the Xkey to resume clear.
4. Press the xkey four times and back to the Display Check
mode. And remove the lithium-ion battery.
3-10. ReleasingThe Test Mode
Refer to the “SECTION 4. TEST MODE”.
Note: Once the test mode is activated 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.