Sony AM-NX1 User manual

SERVICE MANUAL
•SonicStage, OpenMG and the OpenMG Stick and thelogo, MagicGate Memory MagicGate
emory Stick logo, Memory StickMemory Stick and the logo, Net MD and the Net MD
logo, ATRAC, TRAC3 and ATRAC3 plus are trademarks of Sony Corporation.
•Microsoft, Windows, Windows NT and Windows Media are trademarks or registered
demarks of Microsoft Corporation in the ited 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 registered trademark of Intel Corporation.
•All other trademarks and registered trademarks are trademarks or red trademarks of
their respective holders.
•™ and ® marks are omitted in this manual.
A
Un
registe
M
tra
PORTABLE MINIDISC RECORDER
AEP Model
UK Model
E Model
SPECIFICATIONS
AM-NX1
US and foreign patents licensed from Dolby
Laboratories.
– Continued on next page –
Ver 1.1 2003. 08
9-961-029-02 Sony Corporation
2003H05-1 Personal Audio Company
C2003.08 Published by Sony Engineering Corporation
Model Name Using Similar Mechanism MZ-N910
Mechanism Type MT-MZN910-181
Optical Pick-up Name ABX-1R
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 W
(This output is the value measured at a distance
of 200 mm from the lens surface on the optical
pick-up block with 7 mm aperture.)
Recording and playback time (when
using MDW-80)
Maximum 160 min. in monaural
Maximum 320 min. in LP4 stereo
Revolutions
350 rpm to 3,600 rpm (CLV)
Error correction
ACIRC (Advanced Cross Interleave Reed
Solomon Code)
Sampling frequency
44.1 kHz
Coding
ATRAC (Adaptive TRansform Acoustic
Coding)
ATRAC3 LP 2/LP4
Modulation system
EFM (Eight to Fourteen Modulation)
Frequency response
20 to 20,000 Hz – 3 dB
Outputs
i: stereo mini-jack (dedicated remote control
jack)/194 mV (10 kΩ)
Maximum output (DC)
Headphones:
4 mW + 4 mW (16 Ω) (European models)
5 mW + 5 mW (16 Ω) (Other models)
Power requirements
Sony AC Power Adaptor connected at the DC
IN 3V jack:
230 V AC, 50/60 Hz (Models for continental
Europe)
230 V AC, 50 Hz (Model for U.K. and
The recorder:
Nickel metal hydride rechargeable battery
NH-14WM, 1.2 V, 1,350 mAh (MIN),
Ni-MH
LR6 (size AA) alkaline battery
Battery charging stand:
AC power adaptor DC 3V
Hong Kong)
100-120 V 220-240 V AC, 50/60 Hz
(Other models)

2
AM-NX1
Battery operation time1)
Dimensions
Approx. 78.9 ×72.2 ×17.2 mm (w/h/d)
(3 1/8×2 7/8×11/16 in.)
(excluding projecting parts and controls)
Mass
Approx. 85 g (3.0 oz) the recorder only
1)Measured in accordance with JEITA.
Supplied accessories
AC power adaptor (1)
Battery charging stand (1)
Headphones/earphones with a remote control
(1)
Dedicated USB cable (1)
NH-14WM Nickel metal hydride rechargeable
battery (1)
Battery carrying case (1)
Dry battery case (1)
CD-ROM (SonicStage Ver. 1.5) (1)*
Carrying pouch (1)
* Do not play a CD-ROM on an audio CD
player.
Design and specifications are subject to change
without notice.
The battery life may be shorter due to
operating conditions, the temperature of
the location, or the type of alkaline dry
battery being used.
When playing
(Unit: approx.hours)(JEITA2))
1) Measured with the power save mode on (see
“Preserving battery power (Power Save
Mode)”).
2) Measured in accordance with the JEITA
(Japan Electronics and Information
Technology Industries Association) standard.
Batteries SP
Stereo LP2 Stereo LP4 Stereo
Nickel metal
hydride
rechargeable
battery3)
3) When using a 100% fully charged nickel metal
hydride rechargeable battery.
31 38 45
LR6 (SG)
Sony alkaline
dry battery4)
47 57 69
Nickel metal
hydride
rechargeable
battery3)
+ One LR6
(SG)4)
80 95 114
4) When using a Sony LR6 (SG) “STAMINA”
alkaline dry battery (produced in Japan).
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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 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 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.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR 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 PUB-
LISHED BY SONY.
On power sources
•Use house current, nickel metal hydride
rechargeable battery, LR6 (size AA) battery,
or car battery.
•Foruse 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

3
AM-NX1
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Bottom (CE) Panel Sub Assy.......................................... 7
3-3. MAIN Board ................................................................... 7
3-4. Upper Panel Sub Assy..................................................... 8
3-5. Ornamental Belt Assy ..................................................... 8
3-6. Mechanism Deck (MT-MZN910-181),
Case (Battery) Block....................................................... 9
3-7. Gear (BSA), Gear (SB) ................................................... 9
3-8. OP Service Assy (ABX-1R) ........................................... 10
3-9. DC Motor (SSM21A/C-NP) (Sled) (M702),
DC Motor (SSM18D/C-NP) (Spindle) (M701),
DC Motor Unit (Over Write Head Up/Down) (M703) .. 10
3-10. Holder Assy ..................................................................... 11
4. TEST MODE.............................................................. 12
5. ELECTRICAL ADJUSTMENTS......................... 17
6. DIAGRAMS
6-1. Block Diagram – MAIN Section – ................................. 37
6-2. Block Diagram – POWER SUPPLY Section – .............. 38
6-3. Note for Printed Wiring Board and
Schematic Diagrams ....................................................... 39
6-4. Printed Wiring Board
– MAIN Board (Component Side) – ............................. 40
6-5. Printed Wiring Board
– MAIN Board (Conductor Side) – ............................... 41
6-6. Schematic Diagram – MAIN Board (1/4) – .................. 42
6-7. Schematic Diagram – MAIN Board (2/4) – .................. 43
6-8. Schematic Diagram – MAIN Board (3/4) – .................. 44
6-9. Schematic Diagram – MAIN Board (4/4) – .................. 45
6-10. IC Pin Function Description ........................................... 50
7. EXPLODED VIEWS
7-1. Panel Section ................................................................... 58
7-2. Chassis Section ............................................................... 59
7-3. Mechanism Deck Section (MT-MZN910-181) .............. 60
8. ELECTRICAL PARTS LIST ............................... 61

4
AM-NX1
System requirements
The following hardware and software are required in order to use the SonicStage software
for the Net MD.
This software is not supported by the following environments:
•Macintosh
•Windows XP versions other than Home Edition or Professional
•Windows 2000 versions other than Professional
•Windows 98 versions other than Second Edition
•Windows NT
•Windows 95
•Personally constructed PCs or operating systems
•An environment that is an upgrade of the original manufacturer-installed operating system
•Multi-boot environment
•Multi-monitor environment
Notes
•We do not ensure trouble-free operation on all computers that satisfy the system requirements.
•We do not ensure trouble-free operation of the system suspend, sleep, or hibernation function on all
computers.
Computer IBM PC/AT or Compatible
•CPU:Pentium II 400 MHz or higher (Pentium III 450 MHz or higher
is recommended.)
•Harddisk drive space: 120 MB or more
•RAM: 64 MB or more (128 MB or more is recommended)
Others
•CD-ROMdrive (capable of digital playback by WDM)
•Sound Board
•USBport(supports USB (conventionally called USB 1.1))
Operating
System
Factory installed:
Windows XP Home Edition/Windows XP Professional/Windows
Millennium Edition/Windows 2000 Professional/Windows 98 Second
Edition
Display High Color (16bit) or higher, 800 ×480 dots or better (800 ×600 dots
or better is recommended)
Others • Internet access: for EMD services and CD information services
•WindowsMedia Player (version 7.0 or higher) installed for playing
WMA files
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static 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
(ABX-1R)
The laser diode in the optical pick-up block may suffer electro-
static break-down easily. When handling it, perform soldering
bridge to the laser-tap on the flexible board. Also perform mea-
sures against electrostatic break-down sufficiently before the op-
eration. The flexible board is easily damaged and should be handled
with care.
OPTICAL PICK-UP FLEXIBLE BOARD
SECTION 1
SERVICING NOTES
laser-tap
•The shipment data will be cleared when the NV is reset. There-
fore, change the NV adjusted values following the Change of
NV Adjusted Values immediately after the NV was reset. (See
page 17)
•This set requires the patch data in the nonvolatile memory
(IC851) to be rewritten using the application, when the MAIN
board or nonvolatile memory (IC851) was replaced. (See page
28)
•Replacement of SN761058AZQLR (LC501) and CXD2680-
207GA (IC801) used in this set requires a special tool.
•In performing the repair with the power supplied to the set, re-
moving the MAIN board causes the set to be disabled.
In such a case, make a solder bridge to short SL802 (OPEN/
CLOSE) on the MAIN board in advance.
SL802
(OPEN/CLOSE)
– MAIN Board (Conductor Side) –

5
AM-NX1
The recorder
ABattery compartment
BTerminals for attaching a battery
charging stand
CTerminals for attaching a dry battery
case
DDC IN 3V jack
EOPEN switch
FHandstrap hole
Use the hole to attach your own strap.
GDedicated USB cable connecting jack
HCHARGE/DATA indicator
Ii(headphones/earphones) jack
SECTION 2
GENERAL This section is extracted from
instruction manual.
The headphones/earphones with a remote control
AVo lume control (VOL+, –)
Turn to adjust the volume.
Bx(stop) button
CNX/ENTER button: play, pause,
enter
DDisplay window
E(group) +, –
F>: FF
.: REW
GClip
HHOLD 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.
ISOUND button
JDISPLAY button
KP MODE/ button
The display window of the remote control
ADisc indication
BTrack number display
CCharacter information display
DPlay mode indication
ESOUND indication
FBattery level indication
GGroup indication

AM-NX1
6
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. BOTTOM (CE) PANEL SUB ASSY
(Page 7)
3-3. MAIN BOARD
(Page 7) 3-4. UPPER PANEL SUB ASSY (Page 8)
3-5. ORNAMENTAL BELT ASSY
(Page 8)
3-6. MECHANISM DECK SECTION (MT-MZN910-181),
CASE (BATTERY) BLOCK
(Page 9)
3-7. GEAR (BSA), GEAR (SB)
(Page 9)
3-8. OP SERVICE ASSY (ABX-1R)
(Page 10)
3-9. DC MOTOR (SSM21A/C-NP) (SLED) (M702),
DC MOTOR (SSM18D/C-NP) (SPINDLE) (M701),
DC MOTOR UNIT (OVER WRITE HEAD UP/DOWN) (M703)
(Page 10)
3-10. HOLDER ASSY
(Page 11)
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.

AM-NX1
7
5 two screws (M1.4)
3 two screws (M1.4)
1 Slide to the direction of the arrow,
open the battery case lid.
2 battery case lid.
4 screws (M1.4)
6 bottom (CE) panel sub assy
Note: Follow the disassembly procedure in the numerical order given.
3-2. BOTTOM (CE) PANEL SUB ASSY
3-3. MAIN BOARD
5 flexible board
(CN701)
1 sheet (radiation B)
6 flexible board
(CN501)
4 Remove two solders of flexible board
from OP service assy.
2 Remove the solder
of terminal board (minus).
3 Remove the solder
of battery terminal (plus) assy.
7 three toothed lock screws
(M1.4)
8 main board

AM-NX1
8
3-4. UPPER PANEL SUB ASSY
3-5. ORNAMENTAL BELT ASSY
3 two screws
(M1.4)
2 two screws
(M1.4)
4 upper panel sub assy
1 Slide the knob (open) and
open the upper panel sub assy.
1 Pull to the direction of the arrow A
and remove two bosses
B .
2 Open to the direction
of the arrow
C
and remove two bosses
D
and convex part
E .
3 Open to the direction
of the arrow
F
and remove two bosses
G
and convex part
H .
4 three convex parts
5 ornamental belt assy
Note: As the ornamental belt assy is
very fragile, do not give an excessive force
to the entire assy when removing it.
convex part
H
boss G
F
convex part E
boss D
C
A
A
boss B
boss B

AM-NX1
9
3-6. MECHANISM DECK SECTION (MT-MZN910-181), CASE (BATTERY) BLOCK
3-7. GEAR (BSA), GEAR (SB)
2 convex part
3 convex part
9 escutcheon (B)
7 spring (R)
6 case (battery) block
5 four claws
0 set chassis assy
8 spring (L)
1 two step screws (MD)
4 mechanism deck sectio
n
(MT-MZN910-181)
1 self tap screw
2 thrust retainer spring
3 washer (0.8-2.5)
4 gear (BSA)
5 gear (SB)

AM-NX1
10
3-8. OP SERVICE ASSY (ABX-1R)
3-9. DC MOTOR SSM21A/C-NP (SLED) (M702), DC MOTOR SSM18D/C-NP (SPINDLE) (M701),
DC MOTOR UNIT (OVER WRITE HEAD UP/DOWN) (M703)
3 Remove lead screw block assy.
4 OP service assy
(ABX-1R)
2 rack spring
1 precision pan screw (M1.4) (EG
)
3 two precision pan screws (M1.4) (EG)
4 DC motor SSM21A/C-NP
(spindle) (M702)
1 Remove four solders of flexible board.
2 Remove two solders of flexible board.
6 three self tap screws
7 DC motor SSM18D/C-NP
(spindle) (M701)
8 washer
5 motor base assy
0 DC motor unit
(over write head up/down)
9 self tap screw

AM-NX1
11
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
AM-NX1 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 be-
tween CD and MO, and each adjustment is automatically ex-
ecuted in order. If a fault is found, the system displays its loca-
tion. Also, the manual mode allows each individual adjustment
to be automatically adjusted.
•Operation in the test mode is performed with the remote com-
mander.A key having no particular description in the text, indi-
cates a remote commander key.
•For the LCD display, the LCD on the remote commander is
shown.
Setting Method ofTest Mode
Short SL803 (TEST) on the MAIN board with a solder bridge
(connect pin <zx. . of IC801 to the ground). Then, turn on the power.
Note: If electrical adjustment (CD and MO overall adjustment) has not
been finished completely, “ERROR” is displayed on LCD of the
set.
SL803
(TEST)
– MAIN Board (Conductor Side) –
Operation in Setting theTest Mode
•When the test mode becomes active, first the display check mode
is selected.
•Other mode can be selected from the display check mode.
•When the test mode is set, the LCD repeats the following dis-
play.
Releasing theTest Mode
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.
V1.400
Microcomputer
version
display
All off
All lit
LCD display

13
AM-NX1
Configuration ofTest 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 au-
tomatic adjustments in the Overall Adjustment mode.
•Transition Method in Manual Mode
1. Set the test mode (see page 12).
2. Press the [VOL +] to activate the manual mode where the LCD
display as shown below.
3. During each test, the optical pick-up moves outward or in-
ward 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 non-
volatile memory (for the items where adjustment was made).
[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 x key
Press the x key
Press the x key
Press the x key
Press the . or [VOL --] key
Press the > key
Press the [VOL +] key
[Electrical Offset Adjustment]
Power Supply Adjustment
Auto Item Feed
CD Overall Adjustment/
MO Overall Adjustment
[Self-Diagnosis Result Display Mode]
Press the [DISPLAY] key
Press the
[DISPLAY] key
The key check quits, or open the upper panel
LCD display
Manual
000
[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.
[P MODE] key: Increases the adjusted
value of the 2nd digit
[SOUND] key: Decreases the adjusted
value of the 2nd digit
[VOL +] key: Increases the adjusted
value of the 1st digit
[VOL --] key: Decreases the adjusted
value of the 1st digit
[Medium item switching]
x key
x key> 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.
[ --] key: When adjusted value is
changed:
Adjusted value is written.
When adjusted value is
not changed:
That item is adjusted
automatically.
[RAM monitor]
Long push of [DISPLAY] key

14
AM-NX1
5. The display changes a shown below each time the
[DISPLAY] 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 xkey to return to the
test mode (display check mode).
LCD display
LCD display
LCD display
LCD display
LCD display
LCD display
C68S01
011
item number
address
adjusted value
• Address & Adjusted Value Display
0FEJ01
011
item number
jitter value
adjusted value
• Jitter Value & Adjusted Value Display
063B01
011
item number
block error value
adjusted value
• Block Error Value & Adjusted Value Display
059A01
011
item number
ADIP error value
adjusted value
• ADIP Error Value & Adjusted Value Display
015F01
011
item number
focus drive value
adjusted value
• Focus Drive Value & Adjusted Value Display
LrefPw 01
011
item number
item title
adjusted value
• Item Title Display
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 17).
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 micro-
computer detect it and record its cause as history in the nonvola-
tile 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-diag-
nosis result display mode, you can determine when the error oc-
curred.
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 12).
2. In the display check mode, press the [DISPLAY] 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 [DISPLAY] 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 xkey to return to the test mode (display check mode).
LCD display
F00000
0XX
error display code
history code
Total recording time
when error occurred
0 XX F0****
0 XX N ****
0 XX N1****
0 XX N2****
0 XX R_****
XX : Error code
**** : Total recording time

15
AM-NX1
• Description of Indication History
History code number Description
F0 The first error
NThe last error
N1 One error before the last.
N2 Two errors before the last.
R_ Total recording time
• 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 Disorderedfocusorcannotreadanaddress
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
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 12).
2. Press the [DISPLAY] key activates the self-diagnosis result dis-
play mode.
3. To reset the error display code, press the – key (twice) when
the code is displayed (except “R_****”).
(All the data on the 1, N, N1, and N2 will be reset)
LCD display (key 1st time)
LCD display (key 2nd time)
ClrOK?
000
ErrCLR
000

16
AM-NX1
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 12).
2. Press the >key and the playing or recording sound skip
result display mode becomes active respectively where the LCD
displays the following.
3. When the Nkey is pressed, total error count is displayed on
the LCD, and each time the >key is pressed, the display
item moves down by one as shown below.Also, if the .key
is pressed, the display item moves up by one.
• 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
4. To quit the sound skip check result display mode and to return
to the test mode (display check mode), press the xkey.
LCD display
P**R**
000
Total count of play
system errors (hex.)
Total count of record
system errors (hex.)
0 00 P**R**
0 00 EIB **
0 00 Stat**
0 00 Adrs**
0 00 BEmp**
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
• Setting Method of Key Check Mode
1. Set the test mode (see page 12).
2. Press the [DISPLAY] key for about 3 seconds activates the
key check mode and display as below.
3. When each key on the set is pressed, its name is displayed on
the LCD.
Example1: When the >key on the set is pressed:
4. When all keys were checked, display as below.
5. If the upper panel is opened, the key check mode quits and the
test mode (display check mode) comes back.
LCD display
** : value of key (hexadecimal 00 to FF)
**
000
LCD display
** : value of key (hexadecimal 00 to FF)
rFF **
000
LCD display
** : value of key (hexadecimal 00 to FF)
RMC OK **
000

17
AM-NX1
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 13).
2. Press the – key.
3. Press the – key once more.
4. Press the xkey to quit the manual mode, and return to the
test mode (display check mode).
Temparature Correction
•Adjustment Method ofTemperature Correction
1. Select the manual mode of the test mode, and set the item num-
ber 015 (see page 13).
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 – key to write the adjusted value.
5. Press the xkey to quit the manual mode, and return to the
test mode (display check mode).
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.
•Operation in the test mode is performed with the remote com-
mander.A key having no particular description in the text, indi-
cates a remote commander key.
•For the LCD display, the LCD on the remote commander is
shown.
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 1.5V from battery ter-
minals.
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
(item number: 741 to 756) Manual Mode
r
4. Laser Power Check
r
5. Adjustment Required Before Overall
Adjustment (item number: 865, 866)
r
6. CD Overall Adjustment (item number: 031)
r
7.
MO Overall Adjustment (item number: 034)
r
8. RESUME Clear (item number 043)
r
9. Rewriting the Patch Data
(at replacement of the MAIN board)
r
10. Rewriting the NV values
*Although an adjustment value performed by power supply ad-
justment and electric offset adjustment is not cleared by NV
reset, in the NV reset 2, all NV data is cleared and the value of
NV returns to a default.

























Manual Mode
Overall Mode
LCD display
ResNV CC
021
LCD display
ResOK?
021
LCD display
NV reset (after several seconds)
Res***
021
Reset!
021
LCD display
** : adjusted value
SetTmp **
015

18
AM-NX1
Power Supply Manual Adjustment
•Adjustment sequence
Adjustment must be done with the following steps.
1. VC1_LOW adjustment (item number : 741)
2. VC1_HIGH 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. REG2 adjustment (item number : 746)
7. REG3_LOW (VC2_LOW) adjustment (item number : 747)
8. REG3_LOW (VC2_HIGH) adjustment (item number : 748)
9. REG3_HIGH adjustment (item number : 749)
10. VREC_LOW adjustment (item number : 751)
11. VREC_MIDDLE adjustment (item number : 752)
12. VREC_HIGH adjustment (item number : 753)
13. ChgV_L adjustment (item number : 755)
14. ChgV_H adjustment (item number : 756)
15. ChgI_L adjustment (item number : 755)
16. ChgI_H adjustment (item number : 756)
•Setting Method of Power Supply Manual Adjustment
1. Make sure that the power supply voltage is 3V (AC adapter).
2. Select the manual mode of the test mode (see page 13).
3. Set item number.
Note: Power supply adjustment auto item feed mode (page 23) is
available to perform the temperature Correction and Power
Supply Adjustment without entering the manual mode.
•Adjustment Method ofVC1_LOW
(item number: 741)
1. Connect a digital voltmeter to the TP902 (VC1) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key (volt-
age down) so that the voltage becomes 2.35 ±0.005V.
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
LCD display
** : adjusted value
VC1 L **
741
digital
voltmeter
MAIN board
TP902 (VC1)
TP952 (GND)
•Adjustment Method of VC1_HIGH
(item number: 742)
1. Connect a digital voltmeter to the TP902 (VC1) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.75 ±0.005V.
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
•Adjustment Method of VC2_LOW
(item number: 743)
1. Connect a digital voltmeter to the TP905 (VC2) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 1.30 ±0.005V.
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
LCD display
** : adjusted value
VC1 H **
742
digital
voltmeter
MAIN board
TP902 (VC1)
TP952 (GND)
LCD display
** : adjusted value
VC2 Lo **
743
digital
voltmeter
MAIN board
TP905 (VC2)
TP952 (GND)

19
AM-NX1
•Adjustment Method of VC2_HIGH
(item number: 744)
1. Connect a digital voltmeter to the TP905 (VC2) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.55 ±0.005V.
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
•Adjustment Method of REG1
(item number: 745)
1. Connect a digital voltmeter to theTP911 (REG1) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.15 +0.01 V.
–0.005
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
LCD display
** : adjusted value
VC2 Hi **
744
digital
voltmeter
MAIN board
TP905 (VC2)
TP952 (GND)
LCD display
** : adjusted value
REG1 **
745
digital
voltmeter
MAIN board
TP911 (REG1)
TP952 (GND)
•Adjustment Method of REG2
(item number: 746)
1. Connect a digital voltmeter to theTP912 (REG2) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 2.2 +0.01 V.
–0.005
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
•Adjustment Method of REG3_LOW (VC2_LOW)
(item number: 747)
1. Connect a digital voltmeter to theTP913 (REG3) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 1.20 ±0.005V.
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
LCD display
** : adjusted value
REG2 **
746
digital
voltmeter
MAIN board
TP912 (REG2)
TP952 (GND)
LCD display
** : adjusted value
REG3L1 **
747
digital
voltmeter
MAIN board
TP913 (REG3)
TP952 (GND)

20
AM-NX1
•Adjustment Method of REG3_LOW (VC2_HIGH)
(item number: 748)
1. Connect a digital voltmeter to theTP913 (REG3) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 1.20 ±0.005V.
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
•Adjustment Method of REG3_HIGH
(item number: 749)
1. Connect a digital voltmeter to theTP913 (REG3) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 1.55 ±0.005V.
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
LCD display
** : adjusted value
REG3L2 **
748
digital
voltmeter
MAIN board
TP913 (REG3)
TP952 (GND)
LCD display
** : adjusted value
REG3 H **
749
digital
voltmeter
MAIN board
TP913 (REG3)
TP952 (GND)
•Adjustment Method of VREC_LOW
(item number: 751)
1. Connect a digital voltmeter to theTP602 (VREC) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 1.12 +0.025 V.
–0.01
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
•Adjustment Method of VREC_MIDDLE
(item number: 752)
1. Connect a digital voltmeter to theTP602 (VREC) on the MAIN
board, and adjust [VOL +] key (voltage up) or [VOL --] key
(voltage down) so that the voltage becomes 1.22 +0.025 V.
–0.01
2. Press the – key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
LCD display
** : adjusted value
VREC L **
751
digital
voltmeter
MAIN board
TP602 (VREC)
TP952 (GND)
LCD display
** : adjusted value
VREC M **
752
digital
voltmeter
MAIN board
TP602 (VREC)
TP952 (GND)