AIWA AM-NX9 Service Manual
AM-NX9
SERVICE MANUAL
Ver 1.0 2003. 06
US and foreign patents licensed from Dolby
Laboratories.
• OpenMG, ATRAC, ATRAC3, ATRAC3plus, SonicStage and their logos are trademarks of Sony
Corporation.
• Microsoft, Windows, Windows NT 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 a registered trademark of Intel Corporation.
• Adobe and Acrobat Reader are trademarks of Adobe Systems Incorporated.
• All other trademarks are trademarks of their respective owners.
manual.
TM
and R marks are omitted in this
Canadian Model
AEP Model
UK Model
Model Name Using Similar Mechanism MZ-N710
Mechanism Type MT-MZN710-177
Optical Pick-up Name LCX-5R
MD recorder
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 objective 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
Approx. 380 rpm to 2,700 rpm
Error correction
ACIRC (Advanced Cross Interleave Reed
Solomon Code)
Sampling frequency
44.1 kHz
Coding
ATRAC (Adaptive TRansform Acoustic
Coding)
ATRAC3 — LP2/LP4
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
SPECIFICATIONS
Frequency response
20 to 20,000 Hz ± 3 dB
Outputs
i: stereo mini-jack, maximum output level
2 mW + 2 mW, load impedance 16 Ω
(European models)
5 mW + 5 mW, load impedance 16 Ω (other
models)
General
Power requirements
AC Power Adaptor connected at the DC IN 3V
jack:
120 V AC, 60 Hz (Model for Canada)
230 V AC, 50/60 Hz (Model for continental
Europe)
230 V AC, 50 Hz (Model for U.K.)
The recorder:
One LR6 (size AA) alkaline battery (not
supplied)
Recommended temperature for
check-in/check-out
+5 °C (+41°F) or higher
PORTABLE MINIDISC RECORDER
Battery operation time
The battery life may be shorter due to operating
conditions and the temperature of the location.
Unit: approx.hour s (JEITA2))
When SP
playing 42 48 56
1)
When using a new Sony LR6 (size AA)
“STAMINA” alkaline dry battery (produced
in Japan).
2)
Measured in accordance with the JEITA
(Japan Electronics and Information
Technology Industries Association) standard.
Note
The battery life may be shorter than that
specified, depending on the operating
conditions, the temperature of the location, and
varieties of a battery.
stereo
LP2
stereo
LP4
stereo
– Continued on next page –
9-877-460-01 Sony Corporation
2003F05-1 Personal Audio Company
C 2003.06 Published by Sony Engineering Corporation
AM-NX9
Dimensions
Approx. 81.6 × 29.9 × 75.0 mm (w/h/d) (31/4×
3
/16× 3 in.) without projections.
1
Mass
Approx. 104 g (3.7 oz) the recorder only
Supplied accessories
AC power adaptor (1)
Headphones/earphones (1)
Dedicated USB cable (1)
CD-ROM (SonicStage Ver. 1.5
and Net MD Simple Burner Ver. 1.2) (1)*
∗Do not play a CD-ROM on an audio CD player.
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.
Notes
• For use in your house: Use the AC power
adaptor. Do not use an AC power adaptor
other than the recommended one since it may
cause the recorder to malfunction.
Polarity of the
plug
• There are regional differences in the supplied
AC power adaptor specifications. For this
reason, you should verify that the power
requirements and plug configuration are
appropriate for your area before you purchase
the recorder.
• 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.
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.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
2
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
TABLE OF CONTENTS
1. SERVICING NOTES............................................... 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Cabinet (Lower) .............................................................. 7
3-3. Paper (Case Lower) Ground ........................................... 7
3-4. MAIN Board ................................................................... 8
3-5. Cabinet (Upper) Section ................................................. 8
3-6. LCD Module ................................................................... 9
3-7. Mechanism Deck (MT-MZN710-177) ........................... 9
3-8. Set Chassis Assy ............................................................. 10
3-9. OP Service Assy (LCX-5R)............................................ 10
3-10. Holder Assy ..................................................................... 11
3-11. DC Motor (Sled) (M702) ................................................ 11
3-12. DC Motor (Over Write Head Up/Down) (M703),
DC SSM18B Motor (Spindle) (M701)........................... 12
4. TEST MODE.............................................................. 13
AM-NX9
5. ELECTRICAL ADJUSTMENTS......................... 18
6. DIAGRAMS
6-1. Block Diagram – MAIN Section – ................................. 31
6-2. Block Diagram – POWER SUPPLY Section – .............. 32
6-3. Note for Printed Wiring Board and
Schematic Diagrams ....................................................... 33
6-4. Printed Wiring Board
– MAIN Board (Component Side) – ............................. 34
6-5. Printed Wiring Board
– MAIN Board (Conductor Side) – ............................... 35
6-6. Schematic Diagram – MAIN Board (1/4) – .................. 36
6-7. Schematic Diagram – MAIN Board (2/4) – .................. 37
6-8. Schematic Diagram – MAIN Board (3/4) – .................. 38
6-9. Schematic Diagram – MAIN Board (4/4) – .................. 39
6-10. IC Pin Function Description ........................................... 43
7. EXPLODED VIEWS
7-1. Cabinet Section ............................................................... 51
7-2. Chassis Section ............................................................... 52
7-3. MAIN Board Section ...................................................... 53
7-4. Mechanism Deck Section-1 (MT-MZN710-177)........... 54
7-5. Mechanism Deck Section-2 (MT-MZN710-177)........... 55
8. ELECTRICAL PARTS LIST ............................... 56
3
AM-NX9
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
(LCX-5R)
The laser diode in the optical pick-up block may suffer electrostatic break-down easily. When handling it, perform soldering
bridge to the laser-tap on the flexible board. Also perform measures against electrostatic break-down sufficiently before the operation. The flexible board is easily damaged and should be handled
with care.
•The shipment data will be cleared when the NV is reset. Therefore, change the NV adjusted values following the Change of
NV Adjusted Values immediately after the NV was reset. (See
page 18)
•This set requires the patch data in the nonvolatile memory
(IC802) to be rewritten using the application, when the MAIN
board or nonvolatile memory (IC852) was replaced. (See page
28)
System requirements
The hardware and software requirements for the Net MD Simple Burner software are as
follows.
Computer IBM PC/AT or Compatible
Operating
System
Display High Color (16bit) or higher, 800 × 480 dots or better (800 × 600 dots
Others • Internet access: For CDDB
•CPU: Pentium II 400 MHz or higher (Pentium III 450 MHz or higher
is recommended.)
•Hard disk drive space: 120 MB or more (Requires additional drive
space depending on the Windows version or audio file sizes.)
•RAM: 64 MB or more (128 MB or more is recommended)
Others
•CD-ROM drive (capable of digital playback by WDM)
•Sound Board
•USB port (supports USB (conventionally called USB 1.1))
Factory installed:
Windows XP Home Edition/Windows XP Professional/Windows
Millennium Edition/Windows 2000 Professional/Windows 98 Second
Edition
or better is recommended)
service
laser-tap
OPTICAL PICK-UP FLEXIBLE BOARD
• In perf orming the repair with the power supplied to the set, removing 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.
– MAIN Board (Conductor Side) –
SL802
(OPEN/CLOSE)
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.
4
Look i ng at the c ontrol s
6q
Front of the recorder
SECTION 2
GENERAL
AM-NX9
This section is extracted from
instruction manual.
1
2
3
4
5
A GROUP button
B MENU button
C VOL +* and – buttons
∗ The VOL + button has a tactile dot.
D NX/ENTER (play/pause/enter)
button*
∗ The NX/ENTER button has a tactile
dot.
E DC IN 3V jack
7
8
9
q;
qa
s
F xSTOP/CANCEL (stop/cancel)
button
G Display window
H DOWNLOAD button
I USB jack
When connecting to your computer,
connect the dedicated USB cable to
this jack.
J HOLD switch
K i (headphones/earphones) jack
L . and > (skip/search) buttons
Back of the recorder
1
A OPEN button
B Hand strap hole
Use the hole to attach your own strap.
C Battery compartment lid
The display window of the recorder
1
2
3
A Disc indicat ion
B Group mode indication
Lights up when group mode is on.
C Track number display
D Battery level indication
Shows approximate battery condition.
E Play mode indication
F SOUND indication
G Disc, group, track indication
H Character information display
2
3
4
5
6
7
8
Shows play mode of the MD.
Displays the track names, elapsed
time, etc.
5
AM-NX9
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
Note 1: The process described in can be performed in any order.
Note 2: Without completing the process described in , the next process can not be performed.
SET
3-2. CABINET (LOWER)
(Page 7)
3-3. PAPER (CASE LOWER) GROUND
(Page 7)
3-8. SET CHASSIS ASSY
(Page 10)
3-4. MAIN BOARD
(Page 8)
3-7. MECHANISM DECK
(MT-MZN710-177)
(Page 9)
3-9. OP SERVICE ASSY
(LCX-5R)
(Page 10)
3-10. HOLDER ASSY
(Page 11)
3-5. CABINET (UPPER) SECTION
(Page 8)
3-6. LCD MODULE
(Page 9)
3-11. DC MOTOR (SLED)
(M702)
(Page 11)
3-12. DC MOTOR
(OVER WRITE HEAD
UP/DOWN) (M703),
DC SSM18B MOTOR
(SPINDLE) (M701)
(Page 12)
6
Note: Follow the disassembly procedure in the numerical order given.
e
3-2. CABINET (LOWER)
1
two screws
(M1.4)
AM-NX9
1
two screws
(M1.4)
3-3. PAPER (CASE LOWER) GROUND
1
paper (case lower) ground
Note: When installing the paper (case lower) ground,
put it in order not to block up the DC jack (J951) hole
and two screw holes on the cabinet (lower).
2
Remove the cabinet (lower) in the
direction of the arrow.
DC jack (J951) hole
and screw hole
cabinet (lower)
screw hol
7
AM-NX9
)
3-4. MAIN BOARD
4
four screws
(M1.4)
3
flexible board
(CN872)
1
Remove two solders of the
flexible board (over write head).
8
main board
5
battery terminal board (+
6
battery terminal (–)
7
flexible board (optical pick-up)
(CN501)
3-5. CABINET (UPPER) SECTION
5
torsion spring
(pop up-L)
set chassis assy
1
flexible board
(CN872)
2
flexible board (motor)
(CN701)
4
cabinet (upper) section
3
two step screws
torsion spring (pop up-L)
2
Slide the open slider in the direction of the arrow,
and open the panel upper section.
8
3-6. LCD MODULE
n
2
three claws
1
four screws
3
LCD module
AM-NX9
3-7. MECHANISM DECK (MT-MZN710-177)
The portion which projected is removed.
cabinet (upper) sectio
1
two step screws (MD)
2
3
mechanism deck (MT-MZN710-177)
9
AM-NX9
y
3-8. SET CHASSIS ASSY
4
ground spring (USB)
3
battery case
2
two screws
(TP 1.7
1
tension spring
(lock)
×
2.5)
5
set chassis ass
3-9. OP SERVICE ASSY (LCX-5R)
2
gear (SA)
1
washer (0.8-2.5)
3
screw (M1.4)
4
rack spring
5
screw (M1.4)
6
thrust detent spring
8
Pull off lead screw.
B
7
9
Opening the over write head
toward the direction
(LCX-5R) toward the direction
Note: Do not open the entire assy forcibly,
when opening the over write head.
A
, remove the OP service assy
B
.
10
OP service assy (LCX-5R)
A
over write head section
3-10. HOLDER ASSY
y
1
convex portion
2
Open the holder assy.
3
4
boss
AM-NX9
holder ass
3-11. DC MOTOR (SLED) (M702)
2
washer (0.8-2.5)
4
two screws (M1.4)
5
DC motor (sled) (M702)
3
boss
3
gear (SA)
1
Remove six solders
of the motor flexible board.
11
AM-NX9
3-12. DC MOTOR (OVER WRITE HEAD UP/DOWN) (M703),
DC SSM18B MOTOR (SPINDLE) (M701)
1
Remove six solders of the
motor flexible board.
2
tapping screw
3
motor cover
7
DC motor (over write head up/down)
(M703)
6
8
three tapping screws
gear (HA)
4
gear (HB)
Note: Press-fit the gear (HA) up to the position of
the DC motor (over write head up/down)
(M703) as shown below.
gear (HA)
3.15 mm
DC motor
(over write head up/down)
(M703)
9
DC SSM18B motor
(spindle) (M701)
5
gear (HC)
12
SECTION 4
TEST MODE
AM-NX9
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.
Setting Method of Test Mode
Short SL803 (TEST) on the MAIN board with a solder bridge
(connect pin <zx. . of IC801 to the ground). Then, turn on the po wer .
– MAIN Board (Conductor Side) –
SL803
(TEST)
Operation in Setting the Test Mode
•When the test mode becomes active, first the display check mode
is selected.
• Other mode can be selected from the display check mode.
•When the test mode is set, the LCD repeats the following display.
Set LCD display
PGM
All lit
All off
Microcomputer
version
display
888
014
SOUND 1 2
GP
V1.600
Note: If electrical adjustment (CD and MO overall adjustment) has not
been finished completely, “ERROR” is displayed on LCD of the
set.
• When the u/ENTER key is pressed and hold down, the dis-
play at that time is held so that display can be checked.
Releasing the Test 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.
13
AM-NX9
STOP/CANCEL x
key
[VOL +]
key: 100th place of item number
increase.
[VOL --]
key: 100th place of item number
decrease.
[Major item switching]
[VOL +]
key: 10th place of item number
increase.
[VOL --]
key: 10th place of item number
decrease.
[VOL +]
key: Increases the adjusted
value of the 1st digit
[VOL --]
key: Decreases the adjusted
value of the 1st digit
[Medium item switching]
STOP/CANCEL 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.
u/ENTER
key: When adjusted value is
changed:
Adjusted value is written.
When adjusted value is
not changed:
That item is adjusted
automatically.
Configuration of Test Mode
[Test Mode $Display Check Mode%]
Press the
>
or
[VOL +]
key
[Manual Mode]
Press the
STOP/CANCEL x
key
[Servo Adjustment]
[Audio Adjustment]
[Power Supply Adjustment]
[OP Alignment Adjustment]
Press the
.
or
[VOL --]
key
[Overall Adjustment Mode]
Press the
STOP/CANCEL x
key
Press the
[GROUP]
key
[Electrical Offset Adjustment]
Power Supply Adjustment
Auto Item Feed
CD Overall Adjustment/
MO Overall Adjustment
[Self-Diagnosis Result Display Mode]
Press the
Press the
STOP/CANCEL x
MENU
key
key
[Sound Skip Check Result Display Mode]
Press the
Press the
STOP/CANCEL x
[DOWN LOAD]
key
key
[Key Check Mode]
The key check quits, or open the upper panel
Manual Mode
Mode to adjust or check the operation of the set by function.
Normally, the adjustment in this mode is not executed.
However, the Manual mode is used to clear the memory, power
supply adjustment, and laser power check before performing automatic adjustments in the Overall Adjustment mode.
•Transition Method in Manual Mode
1. Set the test mode (see page 13).
2. Press the > to activate the manual mode where the LCD
display as shown below.
Set LCD display
000
3. During each test, the optical pick-up moves outward or inward while the
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).
Manual
> or . key is pressed for several sec-
14
AM-NX9
5. The display changes a shown below each time the
[DOWN LOAD] key is pressed.
• Address & Adjusted Value Display
Set LCD display
011
C68S16
• Jitter Value & Adjusted Value Display
Set LCD display
011
0FEJ16
• Block Error Value & Adjusted Value Display
Set LCD display
011
063B16
• ADIP Error Value & Adjusted Value Display
Set LCD display
011
049A16
• Focus Drive Value & Adjusted Value Display
Set LCD display
011
000F16
item number
adjusted value
address
item number
adjusted value
jitter value
item number
adjusted value
block error value
item number
adjusted value
ADIP error value
item number
adjusted value
focus drive value
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 18).
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 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.
Set LCD display
0XX
1 0000
history code
3. Then, each time the
by one as shown below. Also, the LCD display ascends by one
when the . key is pressed.
> key is pressed, LCD display descends
error display code
Total recording time
when error occurred
0 XX 1 ****
0 XX N ****
• Item Title Display
Set LCD display
011
item number
LrefPw
item title
However in the power mode (item number 700’s), only the
item is displayed.
6. Quit the manual mode, and press the STOP/CANCEL x key
to return to the test mode (display check mode).
0 XX N1****
0 XX N2****
0 XX R_****
XX
: Error code
****
: Total recording time
If the [GROUP] key is pr essed with this display , the LCD switches
to the simple display mode.
4. Quit the self-diagnosis result display mode, and press the
STOP/CANCEL x key to return to the test mode (display check
mode).
15
AM-NX9
• Description of Error Indication Codes
Problem Indication code Meaning of code Simple display Description
No error 00 No error --- No error
01
Servo system error 02 High temperature Temp High temperature detected
03 Focus error Fcus Disordered focus or can not read an address
04 Spindle error Spdl Abnormal rotation of disc
11 TOC err or 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
Offset system error 33
34
35
36 Mirror error Mirr Mirror retry over
Illegal access target
address was specified
Focus error ABCD
offset error
Tracking error
Offset error
X1 tracking error
Offset error
MD DATA 2
disc error
Adrs Attempt to access an abnormal address
ABCD Focus error ABCD offset error
TE Tracking error Offset error
X1TE X1 tracking error Offset error
MD2 MD DATA 2 disc error
• Description of Indication History
History code number Description
1 The first error
N The last error
N1 One error before the last.
N2 Two errors before the last.
R_ Total recording time
Reset the Error Display Code
After servicing, reset the error display code.
• Setting Method of Reset the Error Display Code
1. Set the test mode (see page 13).
2. Press the [GROUP] key activates the self-diagnosis result dis-
play mode.
3. To reset the error display code, press the u/ENTER key
(twice) when the code is displayed (except “R_****”).
(All the data on the 1, N, N1, and N2 will be reset)
16
AM-NX9
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 [MENU] key and the playing or recording sound skip
result display mode becomes active respectiv ely where the LCD
displays the following.
Set LCD display
000
P**R**
3. When the [MENU] key is pressed, total error count is displayed
on the LCD, and each time the
play item moves down by one as shown below. Also, if
the . key is pressed, the display item moves up by one.
Playing sound skip
result display
Total count of record
system errors (hex.)
Total count of play
system errors (hex.)
> key is pressed, the dis-
0 00 P**R**
0 00 EIB **
• Cause of Sound Skip Error
Cause of error Description of error
EIB Sound error correction error
Play
4. To quit the sound skip check result display mode and to return
to the test mode (display check mode), press the
• Setting Method of Key Check Mode
1. Set the test mode (see page 13).
2. Press the [DOWN LOAD] key activates the key check mode.
Stat Decoder status error
Adrs Address access error
BEmp Buffer is empty
STOP/CANCEL x key.
Set LCD display
004
3. When each key on the set 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:
Set LCD display
004
FF
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.)
4. 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.
17
AM-NX9
SECTION 5
ELECTRICAL ADJUSTMENTS
Outline
• In this set, automa tic adjustment of CD and MO can be performed by entering the test mode.
However, before starting automatic adjustment, the memory
clear, power supply adjustment and laser power check must be
performed in the manual mode.
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 terminals.
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
r
4. Laser Power Check
r
5. CD Overall Adjustment (item number: 031)
r
6.
MO
Overall Adjustment (item number: 034)
r
7. RESUME Clear (item number 043)
r
8. Rewriting the Patch Data
(at replacement of the MAIN board)
r
9. Rewriting the NV values
Manual Mode
Overall Mode
Manual Mode
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).
Set LCD display
021
ResNV
2. Press the
u/ENTER key.
Set LCD display
3. Press the u/ENTER key once more.
Set LCD display
021
Res***
NV reset (after several seconds)
021
Reset!
4. Press the
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).
STOP/CANCELx key to quit the manual mode, and
Set LCD display
015
SetTmp
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 u/ENTER key 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)
• Setting Method of Power Supply Manual Adjustment
1. Make sure that the power supply voltage is 1.5V.
2. Select the manual mode of the test mode (see page 14).
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.
18
021
ResOK?
AM-NX9
r
r
r
r
• Adjustment Method of VC1_LOW (PB)
(item number: 741)
Set LCD display
741
VC1 L
1. Connect a digital voltmeter to the TP1928 (VCO1) on the MAIN
board, and adjust
age down) so that the voltage becomes 2.35 ± 0.05V.
2. Press the u/ENTER key to write the adjusted value.
Adjustment and Connection Location:MAIN board
• Adjustment Method of VC1_HIGH (REC)
(item number: 742)
[VOL +] key (voltage up) or [VOL --] key (volt-
digital
voltmete
MAIN board
TP1928 (VCO1)
BATT – (GND)
(see page 22)
• Adjustment Method of VC2_LOW
(item number: 743)
Set LCD display
743
VC2 Lo
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.
digital
voltmete
MAIN board
TP1905 (VCOUT)
BATT – (GND)
2. Press the u/ENTER key to write the adjusted value.
Adjustment and Connection Location:MAIN board
(see page 22)
• Adjustment Method of VC2_HIGH
(item number: 744)
Set LCD display
Set LCD display
742
VC1 H
1. Connect a digital voltmeter to the TP1928 (VCO1) on the
MAIN board, and adjust
key (voltage down) so that the voltage becomes 2.50 ± 0.05V.
MAIN board
TP1928 (VCO1)
BATT – (GND)
2. Press the u/ENTER key to write the adjusted value.
Adjustment and Connection Location:MAIN board
[VOL +] key (voltage up) or [VOL --]
digital
voltmete
(see page 22)
744
VC2 Hi
1. Connect a digital voltmeter to the TP1905 (VCOUT) on the
MAIN board, and adjust
key (voltage down) so that the voltage becomes 2.55 ± 0.01V.
MAIN board
TP1905 (VCOUT)
BATT – (GND)
2. Press the u/ENTER key to write the adjusted value.
Adjustment and Connection Location:MAIN board
[VOL +] key (voltage up) or [VOL --]
digital
voltmete
(see page 22)
19
Loading...