Sony NW-S4 - Network Walkman User manual

SERVICE MANUAL
PORTABLE IC AUDIO PLAYER
US Model
SPECIFICATIONS
NW-S4
Ver 1.2 2001.07
9-873-071-13 Sony Corporation
2001G0500-1 Personal Audio Company
C2001.7 ShinagawaTec Service Manual Production Group

2
NW-S4
Network Walkman is tra emark of Sony
Corporation.
OpenMG an its logo are tra emarks of Sony
Corporation.
WALKMAN is a registere tra emark of Sony
Corporation.
Microsoft, Win ows, Win ows NT, Win ows
Me ia, Win ows Millennium E ition an their
logos are tra emarks or registere tra emarks of
Microsoft Corporation in the Unite States an /or
other countries.
US an foreign patents license from Dolby
Laboratories.
All other tra emarks an registere tra emarks are
tra emarks or registere tra emarks of their
respective hol ers.
TABLE OF CONTENTS
1. SERVICING NOTES.................................................. 3
2. GENERAL ...................................................................... 8
3. DISASSEMBLY
3-1. Disassembly Flow .............................................................. 9
3-2. Lower Case Assy................................................................ 9
3-3. Jack Flexible Module,
Jack (Small Type) (Water Proof) (J301).......................... 10
3-4. MAIN Board .................................................................... 10
3-5. SUB Board ....................................................................... 11
4. DIAGRAMS
4-1. Block Diagram ................................................................. 13
4-2. Note for Printed Wiring Boards and
Schematic Diagrams ........................................................ 14
4-3. Printed Wiring Board – MAIN Board – ......................... 15
4-4. Schematic Diagram – MAIN Board (1/2) – ................... 16
4-5. Schematic Diagram – MAIN Board (2/2) – ................... 17
4-6. Printed Wiring Boards – SUB Board – .......................... 18
4-7. Schematic Diagram – SUB Board – ............................... 19
4-8. IC Pin Function Description ............................................21
5. EXPLODED VIEWS
5-1. Upper Case Assy .............................................................. 25
5-2. Board Assy ....................................................................... 26
6. ELECTRICAL PARTS LIST ................................ 27
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.
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.

3
NW-S4
SECTION 1
SERVICING NOTES
1-1. Introduction
This document describes the “operation check for inspection (Test mode)”and “adjustment after board replacement for repair”.
In performing these works, connect this set to the PC via a USB cable and use the following tool.
Tool list
Ref. No. Tool name Part code Application
1 Board check (Test mode) and readjustment after board replacement
1-2. Board Repair
1. In performing the work, the set should be in a complete state (all components assembled).
2. Install the “OpenMG Jukebox”and “WMP7 Plug-in”(CD-ROM) in the PC in advance.
3. Do not start up other applications in the PC.
4. This set has the Test mode, and various functions can be checked by using exclusive application (Service Tool) on the PC side.
5. Be sure to replace the MAIN board, if any part listed in Table 1-1 is faulty.
6. The data in Table 1-2 have been written to the MAIN board.
7. In repairing other than above parts, repair as usual.
Table 1-1.
Board name Ref. No
MAIN board IC601, IC602, IC603, IC901
Table 1-2.
Board name Stored data
MAIN board Music data, Equalizer initial values, CODEC programs, and ID/IK codes
1-3. Operation Check for Inspection (Test Mode)
Precautions
1. Be sure to remove the battery from this set. (The power is supplied via USB cable)
Operating the set in the Test mode with the battery loaded could clear necessary information.
2. If operation check was performed for inspection, execute “Play Info Initialize”in qd (see page 7) to return respective functions to
initial positions (see Table 1-5 on page 7). In such a case, record current position of each function before executing “Play Info
Initialize”in qd, if necessary.

4
NW-S4
1
7
Work procedure
Preparation:
1. Make sure that no battery is loaded in the set.
2. Start up the test mode “”of the service tool ( ) from the PC, and check that the following screen
appears.
3. Connect PC to this set with a USB cable. Check that the block 1of the following screen “open”, and “1PC”is displayed on the LCD
of the set. (The block 1will “close”if the set is disconnected again)
At this time, a sine wave is outputted from the headphone. Also, the model name is displayed in the block 7of the screen.
Note: If the block 1does not “open”, the circuits in MAIN board will be faulty. Audio signals are outputted from the reference signal in the DSP of
the set.

5
NW-S4
qd
2
3
4
6
5
8qs
0
9
qa
Operational description ofTest mode
1. Audio Block Function Check
Clicking the UP or Down button in block 2of the screen allows you to check with various output frequencies. Also, clicking the UP or
Down button in block 3can check variations of volume. Clicking the L, Stereo, R, or Mute button in block 4can change audio output
status.
2. Battery Threshold Value Check
Connect PC to this set with a USB cable, and the threshold values of battery residual capacity (voltage-converted values) written to the set
at the shipment are displayed in the block 5.
Check that the displayed values are same as listed in Table 1-3.
Table 1-3.
Condition Capacity 1→OFF Capacity 2→1 Capacity 3→2 Capacity 4→3
Voltage set value 1.00V 1.15V 1.25V 1.35V
Converted value (ref.) 320 368 400 432
3. LCDTest
Clicking FULL (full lit), COL1 (column 1), COL2 (column 2), or OFF (full off) in block 8results in all ON, column 1 ON, column 2 ON,
or all OFF of the LCD on the set respectively.
4. CODEC Info Check
The CODEC programs and their versions written to the set can be checked. (block 9)
The CODEC programs written to the set at the shipment are “MP3”, “ATRAC3”, and “WMA”and their versions are as listed below.
(Versions will vary if updated)
Program No. Name Version
CODEC1 MP3 106
CODEC2 AT3 106
CODEC3 WMA 106
CODEC4 blank 0

6
NW-S4
•IBM

PC/AT

an compatibles
CPU: MMX

Pentium

233 MHz an above (Pentium II 400 MHz an
above recommen e )
Har isk rive space: 20 MB an above (Free space is require ,
epen ing on the version of Win ows 98 an the size of the au io
ata you are using.)
RAM: 64 MB an above
CD-ROM rive
Soun Boar : Creative Soun Blaster 16 compatible
Default built-in USB port
• Operating system: The efault installation of Win ows

98 English
version (The pro uct oes not work on Win ows 95/3.1 or Win ows
NT. Not assure trouble-free if you use an upgra e version from
Win ows 95/3.1 to Win ows 98.)
• Display: SVGA (800 × 600 pixel) (supports High Color (16 bit) an
above)
• Internet access
5. Firmware Info Check
The DSP program version and the flash memory capacity can be checked. (block 0)
The version at the shipment is as follows. (Versions will vary if updated)
Version 106
Flash memory size 64094208
6. Sub-CPU Info Check
The Sub-CPU program version can be checked. (block qa)
The version at the shipment is as follows. (Versions will vary if updated)
Version 17
7. Key Check
Click the block qs while pressing a key on the set, and “ON”is displayed in the block associated with the pressed key, so that the key
operation can be checked.
1-4. Required System Configuration
1-5. Action if MAIN Board was Replaced
If the MAIN board was replaced, perform “1. Execution of Play Info Initialize”in work procedure provided below.
When the MAIN board was replaced, the set status is as listed in Table 1-4.
Table 1-4.
Board name Set status after board replacement
MAIN board Music data and music information data stored in the set are cleared and not restored.
Precautions
1. Do not disconnect the USB cable in the midway of work.
2. If the operation on the PC side is not accepted during work, disconnect the USB cable and close the “”file, then
restart from the beginning.

7
NW-S4
Work procedure
1. Execution of Play Info Initialize
If the MAIN board was replaced for repair, execute “Play Info Initialize”in block qd to return respective functions to initial positions (see
Table 1-5).
Note: In executing the “Play Info Initialize”, set the slide switches to the following positions.
AVLS switch ..... NORM
HOLD switch .... OFF
Table 1-5.
Function Position
Play position Head of first music
VOL level 25
MEGA BASS OFF
PLAY MODE OFF
2. Check after Work
(1) After work, check that the set operates normally through the operation in 1-3. “Operation Check for Inspection (Test Mode)”(see page
3).
(2) Make sure that the check-out and check-in can be made using the PC applications “OpenMG Jukebox”(CODEC programs “MP3”and
“ATRAC3”) and “Windows Media Player 7”(CODEC program “WMA”). Also, make sure that the checked out data can be played
normally.
Note: Do not start up the “OpenMG Jukebox”and the “Windows Media Player 7”simultaneously.
(3) For an installation and acquisition method of “Windows Media Player 7”(CODEC program “WMA”), refer to the following instruction.
16
Using Network Walkman in
combination with Windows
Media
TM
Player 7
If you install Microsoft Win ows Me ia
TM
Player 7,
you can transfer a WMA file to your Network
Walkman an play it back. Refer to the online help for
Win ows Me ia Player 7 for etaile operations.
Playing back WMA files with Network
Walkman
Installing Windows Media Player 7 and the
dedicated plug-ins
• Refer to http://www.openmg.com/ for the etails
on how to obtain Win ows Me ia Player 7.
• To use Win ows Me ia Player 7 in combination
with your Network Walkman, you nee to install
the e icate plug-in software. This software has
been alrea y installe when the NW-S4 river was
installe using the enclose OpenMG Jukebox CD-
ROM.
Transferring (copying) a WMA file to your
Network Walkman
Network Walkman can only playback those WMA
files that are liste in the "Available File Formats" in
the "Options" ialog box on Win ows Me ia Player 7
an are of 64 to 160 kbps.
Notes
• If you check "Enable Personal Rights Management" on
the "CD Au io" tab in the "Options" ialog box when
recor ing a CD using Win ows Me ia Player 7, the
music cannot be transferre to Network Walkman. To
enable the music transfer, remove the check mark when
recor ing the CD.
• It may be impossible to transfer the music contents
with copyright management information such as those
purchase via EMD.
17
1Start Win ows Me ia Player 7 an click on the
"Portable Device" tab.
The "Portable Device" screen appears.
2Connect your Network Walkman to the computer
(See page 9).
The computer recognizes your Network Walkman an
the songs ownloa e in Network Walkman are
shown on the "Music On Device" win ow of Win ows
Me ia Player 7. If the computer can not recognize
your Network Walkman, press the F5 key.
3Transfer (copy) the songs to your Network
Walkman.
Select a WMA file you want to transfer (copy) to your
Network Walkman an click on the "Copy Music"
button on Win ows Me ia Player 7 win ow.
This starts copying the selecte song an its title is
a e to the "Music On Device" win ow.
Refer to the online help of Win ows Me ia Player 7
for etails on copying music to a portable evice.
Notes
• Songs checke -out
using the OpenMG
Jukebox (ATRAC3
an MP3) can also be
listene on the
Portable Device
screen of Win ows
Me ia Player 7, but
they can not be playe
back nor checke -in to
Win ows Me ia
Player 7.
• The transferre
(copie ) WMA files to
Network Walkman
from Win ows Me ia
Player 7 are shown on
the OpenMG Jukebox
with a ( ) mark an
you can not playback
nor check-in them to
the OpenMG Jukebox.
Copy Music button
Portable
Device tab
Portable
Device
screen

8
NW-S4
6
1VOL (volume) +/– (page 10)
2Display (page 11)
3SHIFT button (pages 12, 13)
4N/x(play/stop) button
(page 10)
5./>(MEGA BASS/MODE)
buttons (pages 11, 12, 13)
Parts and controls
6Battery compartment
(page 7)
7Strap holder
8HOLD switch (page 14)
9Headphones jack (page 10)
0AVLS switch (page 14)
qa USB connector (page 9)
Refer to the page numbers in icate in parentheses for etails.
SECTION 2
GENERAL This section is extracted from
instruction manual.

NW-S4
9
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
Main board Sub board
Jack flexible module,
Jack (small type) (waterproof) (J301)
Set Lower case assy
Note: Follow the disassembly procedure in the numerical order given.
3-2. LOWER CASE ASSY
2 lock knob (battery lid)
Note: This set is a drip-proof type.
Make it sure that no gaps on the
exterior of the set or no looseness
of screws exsist after repairing an
d
re-assembling the set.
Check it again before shipping.
1 two screws
(1.7
× 6)
1 two screws
(1.7
× 6)
3 lower case assy

NW-S4
10
3-3. JACK FLEXIBLE MODULE, JACK (SMALL TYPE) (WATERPROOF) (J301)
3-4. MAIN BOARD
6 retainer (jack)
5 screw
(1.7
× 2.5)
3 two screws
(1.7
× 2.5)
4 jack flexible module
7 jack (small type) (waterproof)
(J301)
2 P cover assy
1
5 MAIN board
1 Remove the solder of battery terminal (+).
2 Remove the solder of battery terminal (–).
4 connector
(CN802)
3
SUB board
upper case assy

NW-S4
11
3-5. SUB BOARD
7 SUB board
1 bracket retaine
r
4 connection conductive board
3 BL unit
2 liquid crystal display panel
6 LCD fitting plate
5 KEY flexible print board
5 MODE flexible module

NW-S4
12
MEMO

NW-S4
1313
USB
SWITCH
Q901
2
1
6
7
95
9697
10
9
8
12
11
44 – 41, 38 – 35 32 – 25
USB
TRANSCEIVER
END POINT FIFO/
8 BYTE SET-UP REGISTER
PROTOCOL
ENGINE
STATUS/
CONTROL
APPLICATION
INTERFACE
OSC DPLL
19 716
9188 17
13
14
15
25 58 69 45
71
6
48
53
59
2
1
3
5
16
10
9
812322 1166
29 – 32, 41 – 44
3
54 98
5
7
49476760
4
8
58
59
57
14
8
1
23
22
49
120
135
SERIAL
PORT
&
DE-
EMPHASIS
DIGITAL
FILTER
&
D/A
CONVERTER
HEADPHONE
AMP
DIGITAL
VOLUME
CONTROL,
BASS/
TREBLE
BOOST,
LIMITING
ANALOG
FILTER
&
ANALOG
VOLUME
CONTROL
14
10
AUDIO
OUTPUT
SWITCH
Q102, 202
MUTING
Q101, 201
MUTING
CONTROL
SWITCH
Q301(2/2)
MUTING
Q302
MUTING
CONTROL
SWITCH
Q301(1/2)
1160
6538
LIQUID
CRYSTAL
DISPLAY
LCD901
VOLTAGE
DETECT
IC403
VOLTAGE
DETECT
IC402
124
6
5
2
3
+1.8V
REGULATOR
IC301
B+ SWITCH
Q403
B+ SWITCH
Q405
10
15
41
62
: PLAYBACK
CN901
(1/2)
USB
CONNECTOR
X901
48MHz
D+ D+
XIN
XOUT
3
2
USB
CONTROLLER
IC901
AD0 – AD7
RESET
A0 – A7
INTR
CS
RD
WR
D903
I/O1 – I/O8
512M BIT FLASH ROM
IC602
RE WE
WP
CE
CE
CLE
CLE
ALE
R/B
ALE R/B
D0 – D7
ADDRESS BUS
DATA BUS
2B
2A
2G
2Y3
2Y2
2Y1
2Y0
2 TO 4 DECODER
IC604
D0 – D7
D0 – D7
A0 – A7
A0 – A7
CE
CLE ALE
R/B
HD4 HD0 HD2 HD1
BDR0
IOSTRB
BFSX2 BCLKX2 BDR2
BDX2 INT2 INT3
BCLKR1
A0 – A7D0 – D7
DIGITAL SIGNAL
PROCESSOR
IC601
INT1
IS
A15
R/W
RS
HD3
X1
X2/CLKIN
EEPROM
IC603
CS
WP
SI
SO
SCK
IRQ1
AN0
WKP7
P37
P32
X2
X1
OSC2
OSC1
P90
COM2
COM1
WKP5 – WKP0
CPU
IC801
IRQ0
P33
RES
RXD
D/A CONVERTER (IC302)
B+
TXD
SCK
P36
SEG9 – SEG22
SEG1 – SEG15
X601
16.9344MHz
LCD
BACK LIGHT
D803 – 805
S801 – 806
S808
V1 B+
X802
8MHz
X801
32.768kHz
OFF HOLD
VBATT B+
Q402
VCORE
DSP (IC601)
B+
V2
DSP (IC601),
512M BIT EEPROM (IC602),
EEPROM (IC603),
USB CONTROLLER (IC901)
B+
D/A CONVERTER (IC302)
B+
V1
CPU (IC801)
B+ L301
BCLKX0
BCLKX1
HD6
BFSXO
BDXO SDATA
LRCK
BCLK
ACLK
HD7
SDATA SDATA
LRCK LRCK
BCLK SCLK
ACLK MCLK
RST
D/A CONVERTER,
HEADPHONE AMP
IC302
HP B
HP A
i
J301
(HEADPHONE)
VBATT
B+
L401
DRY BATTERY
SIZE “AA”
IEC DESIGNATION
R6
1PC. 1.5V
L404
L402
D405
D403
D402
THP401
CN901
(2/2)
1
4
VBUS
GND
USB
CONNECTOR
D802
HOLD
40 – 2643 – 48
RESET SIGNAL
GENERATOR
IC802
11
12
131 – 134, 136 – 139
99 – 104, 113, 114
•SIGNAL PATH
D– D–
HD5
BATTERY/USB
CHANGE-OVER
SWITCH
Q401
23
8 7
5
OUT
EN
LBI LBO
LX
SWITCHING
REGULATOR
IC401
42 WKP6
AVLS
CONTROL
SWITCH
Q801
S807
NORM LIMIT
AVLS
S801
+
S802
–
VOL
S803
SHIFT
x b
S804
.
MODE
S805
.
MEGA BASS
S806
+3.2V
REGULATOR
IC405
DC/DC
CONVERTER
IC404, L403
COM0
COM1
SEG0
ı
SEG14
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM

NW-S4
1414
3.4 Vp-p
22.7
µ s
3.4 Vp-p
710 ns
4.1 Vp-p
3.5
µ s
4.1 Vp-p
6.6
µ s
3.2 Vp-p
125 ns
1.8 Vp-p
30.5
µ s
1.2 Vp-p
59.1 ns
3.2 Vp-p
59.1 ns
3.4 Vp-p
22.7
µ s
3.4 Vp-p
710 ns
3 Vp-p
20.8 ns
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•f: internal component.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partson the patternfaceside seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
4-2. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
• MAIN and SUB boards are multi-layer printed board.
However, the patterns of intermediate-layer have not been in-
cluded in this diagrams.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
• % : indicates tolerance.
•f: internal component.
•C: panel designation.
•A: B+ Line.
• Powervoltageisdc 1.5Vand fed with regulated dcpower
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : PLAYBACK
∗: Impossible to measure
• Voltagesaretakenwith aVOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: PLAYBACK
*The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
form that of conventional IC.
• Waveforms
– MAIN Board –
1IC901 6(XIN) (When power on)
50 mV/DIV, 50 ns/DIV
2IC601 rk (BCLKX0)
2 V/DIV, 500 ns/DIV
3IC601 td (BFSX0)
1 V/DIV, 5 µs/DIV
4IC601 ua (BCLKX1)
2 V/DIV, 50 ns/DIV
5IC601 oj (X2/CLKIN)
200 mV/DIV, 50 ns/DIV
6IC801 2(X1)
500 mV/DIV, 20 µs/DIV
7IC801 5(OSC2) (When power on)
100 mV/DIV, 200 ns/DIV
8IC401 7(LX)
1 V/DIV, 2 µs/DIV
9IC404 9(LX)
1 V/DIV, 2 µs/DIV
– SUB Board –
0IC302 1(LRCK)
1 V/DIV, 5 µs/DIV
qa IC302 3(SCLK)
2 V/DIV, 500 ns/DIV
qs IC302 5(MCLK)
2 V/DIV, 50 ns/DIV
3.2 Vp-p
59.1 ns
*Lead Layouts (IC601 and IC901)
surfac
e
Lead layout of conventional IC CSP (chip size package)

NW-S4
1515
D401 C-2
D402 B-2
D403 E-3
D405 B-3
D802 F-6
D901 E-4
D902 E-4
D903 F-6
IC401 B-2
IC402 A-2
IC403 A-2
IC404 B-4
IC405 E-2
IC601 F-10
IC602 B-9
IC603 G-8
IC604 E-8
IC801 B-6
IC802 F-6
IC901 E-7
Q401 B-3
Q402 E-3
Q403 B-3
Q405 F-7
Q801 C-2
Q901 E-6
CN901
USB
CONNECTOR
IC901
NOT
SUPPLIED
C421
C623
C424
C422
C427
C904
C902
C901
C813
C622
C621
C619
C615
C613
C609
C603
C614
C611
C606
C607
C610
C402 C417 C418
C406 C407 C408
C414
C410
C420
C601
C602
D403
D802
D903
IC604
IC603
(NOT SUPPLIED)
IC405
IC802
L402
L404
L403
Q405
Q402
Q901
VDR801 VDR802
VDR803
VDR804
R408
R409
R428
R430
R429
R436
R601
R602
R603
R607
R609
R610
R811
R812 R813
R814
R826
R827
R901
R902
R903
R904
R905
R906
R831
R604
R907
R908
R909
R910
R911
X901
D901
D902
L401
X601
IC601
NOT
SUPPLIED
THP401
C604
C818
C819
C416
C415
C413
C412
C411
C409
C423
C816
C903
C815
C812
C811
C804
C802
C620
C618 C608
C605
C801
D402
D405
IC401
IC404
IC402 IC403
IC801
Q403
Q401
VDR805
R410
R411
R412
R414
R415
R416
R420
R423
R424
R426
R435
R406
R404
R403
R402
R417
R418
R431
R419
R421
R612
R808
R809
R810
R815
R819 R820 R821 R822 R823
R824
R825
R830
R829
R605
R838
IC602
(NOT SUPPLIED)
X802
X801
D401
C821
R839
CN801
Q801
C404
R405
*
*
(11)
11
1-681-433-
MAIN BOARD (CONDUCTOR SIDE)
DRY
BATTERY
SIZE “AA”
IEC DESIGNATION
R6
1PC. 1.5V
MAIN BOARD (COMPONENT SIDE)
(11)
11
1-681-433-
ASUB BOARD
CN802
14
E1
C2
C1
E2
B1 B2
A
B
C
D
E
F
G
1 2 3 4 5 6 7 8 9 10 11
4-3. PRINTED WIRING BOARD – MAIN Board –
• Semiconductor
Location
Ref. No. Location
(Page 18)

NW-S4
1616
4-4. SCHEMATIC DIAGRAM – MAIN Board (1/2) – • See page 14 forWaveforms. •See page 20 for IC Block Diagrams.
(Page 17)

NW-S4
1717
4-5. SCHEMATIC DIAGRAM – MAIN Board (2/2) – • See page 14 forWaveforms. •See page 20 for IC Block Diagrams.
(Page 16)
(Page 19)

NW-S4
1818
FB302
Q202
Q102
Q101
Q201
D803
R835
CN805
D804
R836 R837
D805
S804
C310
C313
C101
C301
C805
C806
C102
C202
C303
C304
C306
C311 C312
D201
D101
D808
D811
FB301
IC302
IC301
L301
Q301
Q302
R101
R102
R103
R104
R105
R106
R202
R203
R204
R205
R206
R803
R802
CN803
CN601
CN804
C814
C810
C808
C807
C315
C314
C307
C305
C302
C201
D810 D809
D812 D813
D806 D807
R832
R834
R833
R804
R805
R817
R818
R306
R305
R304
R303
R302
R301
R201
CN802
SUB BOARD (COMPONENT SIDE)
(11)
11
1-681-434-
LCD901
LIQUID CRYSTAL DISPLAY
SUB BOARD (CONDUCTOR SIDE)
KEY FLEXIBLE BOARD JACK FLEXIBLE
MODULE
A
MAIN BOARD
CN801
S805
S805
S806
S801
S802
1
2
3
4
5
CN807
11
1-678-604-
+
–
VOL
MODE
>
S806
S801
S802
MEGA BASS
.
J301
(HEAD PHONE)
i
9
8
7
6
5
4
3
2
1
CN602
AVLS
S807 SHIFT
S803
HOLD
S808
NORM
LIMIT
HOLD
OFF
(11)
11
1-681-434-
1
2
CN806
B2
E
B1
C2
C1
C1
B
C2
E1
E2
S
S
D
D
D
D
G
G
S
G
SG
D803 –805
(LCD BACK LIGHT)
Nx
MODE FLEXIBLE
MODULE
A
B
C
D
E
F
G
1 2 3 4 5 6 7 8 9 10
4-6. PRINTED WIRING BOARDS – SUB Board –
D101 B-5
D201 B-5
D803 A-6
D804 A-7
D805 A-8
D806 E-4
D807 E-4
D808 A-10
D809 E-4
D810 E-3
D811 A-9
D812 F-3
D813 F-3
IC301 B-1
IC302 B-2
Q101 B-4
Q102 B-4
Q201 A-4
Q202 A-4
Q301 A-2
Q302 A-3
• Semiconductor
Location
Ref. No. Location
(Page 15)

NW-S4
1919
4-7. SCHEMATIC DIAGRAM – SUB Board – • See page 14 forWaveforms. •See page 20 for IC Block Diagram.
(Page 17)

NW-S4
2020
1
2
3
4
5
6
7
8
SERIAL
PORT
DE-
EMPHASIS
HEADPHONE
AMP
DIGITAL
FILTERS
∆∑
DAC
ANALOG
FILTER
DIGITAL
VOLUME
CONTROL
BASS/TREBLE
BOOST
LIMITING
ANALOG
VOLUME
CONTROL
∆∑
DAC
ANALOG
FILTER
ANALOG
VOLUME
CONTROL
14
13
16
15
12
11
10
9
CONTROL PORT
LRCK
SDATA
SCLK
VD/IO
MCLK
SCL
VQ HP
REF GND
HP B
VA HP
RST
SDA
VA
GND
HP A
FILT+
8
15
16 10
14 13 12 11
GA B Y0 Y1 Y2 Y3
9
67 45
23
1
GAB
Y0 Y1 Y2 Y3
VCC 2G (ENABLE)
2Y0 2Y1 2Y2 2Y3
2A 2B
1Y0 1Y1 1Y2 1Y3
1A 1B
GND
1G (ENABLE)
SELECT DATA OUTPUTS
SELECT DATA OUTPUTS
–
+
–
+
1
2
3
4
5
REFERENCE
LOW-BATTERY
COMPARATOR
ERROR
AMP
Q
ONE-SHOT
TRIG
–
+
EN
8
7
6
SQ
R
F/F
+
–
ZERO CROSSING
AMP
Q
ONE-SHOT
TRIG
MINIMUM
OFF-TIME
ONE-SHOT
MAXIMUM
ON-TIME
OFF-SHOT
CURRENT-LIMIT
AMP
LBI
FB
REF
LBO
OUT
LX
GND
SHDN
+
–
+ –
CONTROL
AND
DRIVER
LOGIC
+
–
+
–
+ –
+ –
CHIP
SUPPLY
+
–
+
–
+
–
FB
REF
SLOPE COMPENSATION
+
–
+
–
+ –
FB
REF
40mV
OVERVOLTAGE
COMPARATOR
PWM ON
SIGNAL
SYNC
CELL
RAMP
GEN
REFERENCE
VOLTAGE
PWM
PGND
LX
SHDN
SYNC/
PWM
LIM
10
9
8
7
6
0.1X
SENS
FET
0.1X
SENS
FET
5mA 2N PFM
ADJ.IN PWM
PFM CURRENT
COMPARATOR
LIM
COMPARATOR
NEGLIM
COMPARATOR
12mV
120mV
PWM
COMPARATOR
REF
ON
PFM
COMPARATOR
IN
BP
GND
REF
FB
1
2
3
4
5
P
N
• IC Block Diagrams
– MAIN Board –
IC401 MAX1674EUA-TG069
IC404 MAX1692EUB-TG069
IC604 SN74LV139ADGVR
IC901 ML60851CLBZ060 (Not supplied part)
– SUB Board –
IC302 CS4343-KSR
1 3233 31 30 29 28 27 26 25 24 23
34
35
36
37
38
39
40
41
42
43
44
1 2 3 4 5 6 7 8 9 10 11
22
21
20
19
18
17
16
15
14
13
12
END POINT FIFO/
8BYTE SET-UP
REGISTER
STATUS/
CONTROL
PROTOCOL
ENGINE
USB
TRANSCEIVER
DPLL
OSC
APPLICATION
INTERFACE
DREQ
AD7
AD6
AD5
AD4
GND
VCC5
AD3
AD2
AD1
AD0
D+ D–
VCC3
TEST1 TEST2
XIN
XOUT
CS
RD
WR
RESET
INTR
D15
D14
D13
D12
GND
VCC5
D11
D10
D9
D8
ALE ADSEL A7 A6 A5 A4 A3 A2 A1 A0 DACK