Sony CD Walkman D-EJ855 User manual

SERVICE MANUAL
Ver 1.3 2003.11
SPECIFICATIONS
PORTABLE CD PLAYER
D-EJ855
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM-3325ES
Optical Pick-up Name DAX-25E
9-873-379-04 Sony Corporation
2003K05-1 Personal Audio Company
C2003.11 Published by Sony Engineering Corporation
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ= 780 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.)
D-A conversion
1-bit quartz time-axis control
Frequency response
20 - 20 000 Hz
+1
–2
dB (measured by JEITA CP-
307)
Output (at 4.5 V input level)
Line output (stereo minijack)
Output level 0.7 V rms at 47 kΩ
Recommended load impedance over 10 kΩ
Headphones (stereo minijack)
Approx. 5 mW + Approx. 5 mW at 16 Ω
(Approx. 0.5 mW +Approx. 0.5 mW
at 16
Ω )*
*For the customers in France
Optical digital output (optical output connector)
Output level: –21 - –15 dBm
Wavelength: 630 - 690 nm at peak level
•Two LR6 (size AA) batteries: 3 V DC
•AC power adaptor (DC IN 4.5V jack):
US, Canadian, Taiwan models: 120 V,60 Hz
AEP, French, E13 models: 220 - 230 V,50/60 Hz
UK model: 230 - 240 V,50 Hz
Australian model: 240 V,50 Hz
E33, Korean, Tourist models: 100 - 240 V,
50/60 Hz
Hong Kong model: 220 V,50/60 Hz
Chinese model: 220 V,50 Hz
Power requirements
For the area code of the model you
purchased, check the upper left side of the
bar code on the package.
•Two Sony NC-6WM rechargeable batteries:
2.4 V DC
Battery life* (approx. hours)
(When you use the CD player on a flat and stable
surface.)
Playing time varies depending on how the CD
player is used.
When using G-PROTECTION
“1” “2”
Two NC-6WM 19 19.5
(charged for
about 5 hours**)
External battery case 66 71
(two alkaline batteries***)
Rechargeable batteries 88 92
NC-6WM and
external battery case
(two alkaline batteries***)
*Measured value by the standard of JEITA
(Japan Electronics and Information Technology
Industries Association).
** Charging time varies depending on how the
rechargeable battery is used.
*** When using Sony alkaline batteries LR6 (SG)
(produced in Japan)
Operating temperature
5°C - 35°C (41°F - 95°F)
Dimensions (w/h/d) (excluding
projecting parts and controls)
Approx. 135.0 ×18.2 ×135.0 mm
(5
3 ⁄ 8 ×
23
⁄ 32 ×5 3 ⁄ 8 in.)
Mass (excluding accessories)
Approx. 172 g (6.1 oz)
Supplied accessories
For the area code of the location in which you
purchased the CD player, check the upper left side
of the bar code on the package.
AC power adaptor (1)
Headphones/earphones with remote control (1)
Rechargeable batteries (2)
Battery carrying case (2)
Carrying pouch (1)
External battery case (1)
AC plug adaptor (1)*
1
*1Supplied with E33 and Tourist models
Design and specifications are subject to change
without notice.
• Abbreviation
E13: 220 - 230 V AC area in E model
E33: 100 - 240 V AC area in E model

2
D-EJ855
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.
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 3
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Upper Lid (M) Sub Assy................................................. 7
3-3. Cabinret (Upper) Sub Assy ............................................. 8
3-4. MAIN Board, Optical Pick-up Section
(CDM-3325ES) ............................................................... 8
4. ELECTRICAL CHECK .......................................... 9
5. DIAGRAMS
5-1. Block Diagram –MAIN Section (1/2) –....................... 10
5-2. Block Diagram –MAIN Section (2/2) –....................... 11
5-3. Block Diagram –POWER SUPPLY Section –............. 12
5-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 13
5-5. Printed Wiring Board ...................................................... 14
5-6. Schematic Diagram –MAIN Board (1/3) –.................. 15
5-7. Schematic Diagram –MAIN Board (2/3) –.................. 16
5-8. Schematic Diagram –MAIN Board (3/3) –.................. 17
5-9. IC Pin Function Description ........................................... 18
6. EXPLODED VIEWS
6-1. Upper Lid, Cabinet (Upper) Section .............................. 25
6-2. Cabinet (Lower) Section ................................................. 26
3-4. Optical Pick-up Section (CDM-3325ES) ....................... 27
7. ELECTRICAL PARTS LIST ............................... 28
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
On AC poweradaptor
•Use only the AC power adaptor supplied or
recommended in “Accessories (supplied/
optional).”Do not use any other AC power
adaptor. It may cause a malfunction.
Polarity of the plug
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

3
D-EJ855
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electro-
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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 emis-
sion, observe from more than 30 cm away from the objective lens.
BEFORE REPLACINGTHE OPTICAL PICK-UP BLOCK
Please be sure to check thoroughly the parameters as par the “Op-
tical Pick-Up Block Checking Procedures”(Part No.: 9-960-027-
11) issued separately before replacing the optical pick-up block.
Note and specifications required to check are given below.
•FOK output: IC601 yg pin
When checking FOK, remove the lead wire to disc motor.
•RF signal P-to-P value: 0.4 to 0.6Vp-p
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S804. (push switch type)
The following checking method for the laser diode is operable.
•Method:
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. With a disc not set, turn on the S801 with a screwdriver having
a thin tip as shown in Fig.1.
3. Press the >Nbutton.
4. Observing the objective lens, check that the laser diode emits
light.
When the laser diode does not emit light, automatic power
control circuit or optical pickup is faulty.
In this operation, the objective lens will move up and down 4
times along with inward motion for the focus search.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Fig. 1 Method to push the S804
S804
detection lever
detection lever
MAIN board
About CD-Rs/CD-RWs
This CD player can play CD-Rs/CD-RWs recorded in the CD-DA
format*, but playback capability may vary depending on the qual-
ity of the disc and the condition of the recording device.
* CD-DA is the abbreviation for Compact Disc DigitalAudio. It is
a recording standard used for the Audio CDs.

4
D-EJ855
SERVICE MODE
In the Service mode, this set can check the following.
1. Service Mode Setting Method
To set the service mode, perform as follows.
1) Make sure that the power is not turned on.
2) Check for the following states:
Open/close detection switch (S804)...... OFF
Solder bridge at SL806 (OPEN)............ OPEN
[AVLS] switch (S802) ........................... NORM
[HOLD] switch (S801) .......................... OFF
[G PROTECTION] switch (S803) ....... 1
3) Short the solder bridge at the SL807 (TEST) on the MAIN
board (see Fig. 2).
4) Turn the power on.
2. Operation in Service Mode
When the Service mode is set, the LCD on the remote commander
displays the following.
Remote commander LCD display
3. Operation of Buttons and Knobs in Service Mode
The following operation can be checked by operating the buttons
and knobs on the set and remote commander.
3-1 . Case without Setting a CD
•>N/ .buttonson the set and >N/ .knobs on
remote commander
Optical pick-up movement (outward or inward)
Tracking/sled servo off
Note: Do not look directly at the laser beam from the optical pick-up.
Do not move forcibly the optical pick-up exceeding the most-out-
side or most-inside track.
3-2 . Case with Setting a CD
Cheking method:
1) Make sure that the power is not turned on.
2) Leave a solder bridge of the SL807 (TEST) on the MAIN board
shorted.
3) Turn the power on, and then set a CD and play it with the X
button on the remote commander.
• x button on the set and remote commander
All servos (focus/tracking/sled) off
•>N/ .buttonson the set and >N/ .knobs on
remote commander
Optical pick-up movement (outward or inward)
Tracking/sled servo off
•[PRT/ENT] button on remote commander
Tracking gain up mode
•[VOL +] / [VOL --] buttons on the set and [VOL +] / [VOL --]
knobs on remote commander
2-step volume setting
•[PLAYMODE] button on remote commander
CLV speed becomes 1 to 4 times each time the button is pressed
Tracking/sled servo on
–MAIN Board (Component Side) –
Service mode
All lit 888
Microcomputer
version display VD101
DDDD
BASS12
Fig. 2
R813
R808
C811
C810
C804
C807
C805 C809
R812
R811
R807
VDR8
FB803
D803
K
AA
C440
+
C464
C806
+
D805
SL806
(OPEN) SL807
(TEST)
•
0000
Remote Commander LCD display
(play mode)
Remote Commander LCD display
(For the rest, turn the power off and then turn it on again)
Up0000

5
D-EJ855
•[SOUND] button on remote commander
Servo auto adjustment
4.Service Mode Releasing Method
To release the service mode, perform as follows.
1) Turn the power off.
2) Open the solder bridge at the SL807 (TEST) on the MAIN
board.
Note: Remove the solder completely.
5.Error Rate Check Display
The C1 error rate check display mode becomes active if the fol-
lowing operation is performed during the operation in the normal
mode.
1) Turn the power off, and cancel other service operations.
2) Turn the power on, and then set a CD and play it with the X
button on the remote commander.
3) Press the [SOUND] button on the remote commander to make
automatic adjustment.
4) Press the [PLAY MODE] button on the remote commander.
5) Press the [DISPLAY] button on the remote commander, and
the C1 error rate display will be activated and the LCD on the
remote commander will display as follows.
Note: In the play state, press the [SOUND] button on the remote com-
mander before pressing the [PLAY MODE] button. Wrong order of
button operations will result in very large Er**** value.
6) Turn the power off.
7) Open the solder bridges at the SL807 (TEST) on the MAIN
board.
Note: Remove the solder completely.
Remote Commander LCD display
(1 time)
010001
(4 times)
040004
(For the rest, turn the power off and then turn it on again)
0000
Remote Commander LCD display
Remote Commander LCD display
010001
Remote Commander LCD display
**** value
0000 to 0099 : OK
more than 0100 : NG
Er****

6
D-EJ855
4
Getting started
Locating the controls
For details, see pages in parentheses.
CD player (front)
CD player (inside)
4x(stop) /CHARGE button•
CHARGE lamp
(pages 8, 15, 16, 19)
6i(headphones) jack
(page 7)
8AVLS switch
(page 15)
1EXT BATT (external battery)/
DC IN 4.5 V (external power
input) jack (pages 7, 19, 21)
3VOL (volume) +*/–buttons
(page 8)
2LINE OUT (OPTICAL) jack
(page 17)
qa HOLD switch
(page 15)
7OPEN switch
(page 7)
q; Battery
compartment
(page 19)
CD player (rear)
9G-PROTECTION
switch
(page 13)
5.(AMS/search)•> N*
(AMS/search/play) buttons
(pages 7, 8, 12)
*The button has a tactile dot to help you operate the CD player by touch.
5
Remote control
Note
Use only the supplied remote control. You cannot
operate this CD player with the remote control
supplied with other CD players.
qf x(stop) button
(pages 8, 16)
qj PLAY MODE
button
(pages 10 - 12)
qs Display
(pages 9, 11 - 15)
qh DISPLAY
button
(pages 13, 14)
ws SOUND button
(page 14)
qd Rotary control
N/>: play, AMS/search (pages 8, 12)
.: AMS/search (pages 8, 12)
VOL +/–: Pull the control in the direction of the
arrow, and then turn it toward + or –. (page 8)
qk RPT (repeat)/ENT
(enter) button
(pages 10 - 12)
ql HOLD switch
(page 15)
qg Clip
Getting started
w; i(headphones) jack
(page 7)
wa X(pause) button
(page 8)
6
Using the carrying pouch
You can carry your player and its battery case together using the supplied carrying pouch. Insert
them into the proper places in the pouch as illustrated below.
SECTION 2
GENERAL This section is extracted from
instruction manual.

D-EJ855
7
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-2. UPPER LID (M) SUB ASSY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
3-2. UPPER LID (M) SUB ASSY
(Page 7)
3-3. CABINET (UPPER) SUB ASSY
(Page 8)
3-4. MAIN BOARD,
OPTICAL PICK-UP SECTION (CDM-3325ES)
(Page 8)
SET
3 guide (L)
2 screw
(M1.4)
4 screw
(M1.4)
1 Open the upper lid (M) sub assy.
6 Remove the upper lid (M) sub assy
in the direction of arrow
A .
A
5 guide (R)
!
@
Note: To install screws, tighten them with 0.4 kg/cm
2
of torque.
(If tighten them too hard, portion
! may get cracked.)
Ver 1.1

D-EJ855
8
3-3. CABINET (UPPER) SUB ASSY
3-4. MAIN BOARD, OPTICAL PICK-UP SECTION (CDM-3325ES)
6 spring (upper lid-2702)
5 battery terminal board (relay
)
3 claw
2 three screws
(B2)
2 four screws
(B2)
1 screw (B2)
4 cabinet (upper) sub assy
Note: On installation of cabinet (upper) sub assy,
adjust the position of two switches
(S802, S803) and two knobs (GPRO).
knob (GPRO)
S802
3 claw
3 claw
S803
4 cabinet (lower) assy
6 main board
1 cushion
5 flexible board
(CN503)
7 two insulators
7 insulator
8 optical pick-up section
(CDM-3325ES)
1 cushion
2 two connectors
(CN501, CN502)
3 Hold up both the main board and the
optical pick-up section at once, and remove
them from the cabinet (lower) assy.
Note: Handle the flexible board with care whe
n
you hold up the optical pick-up section.

D-EJ855
99
SECTION 4
ELECTRICAL CHECK
The CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
Precautions for Check
1. Perform check in the order given.
2. UseYEDS-18 disc (Part No.: 3-702-101-01) unless otherwise
indicated.
3. Power supply voltage requirement: DC4.5 V in DC IN jack.
(J401)
VOLUME : Minimum
AVLS switch : NORM
HOLD switch : OFF
G•PROTECTION switch : 1
Connecting and Checking Location:
–MAIN Board (Component Side) –
Focus bias Check
Condition:
•Hold the set in horizontal state.
Connection:
Procedure:
1. Connect the oscilloscope to the test points TP601 (RF) and
TP418 (GND) on the MAIN board.
2. Set a disc. (YEDS-18)
3. Press the >Nbutton.
4. Check the oscilloscope waveform is as shown below.
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
RF Signal reference Waveform (Eye Pattern)
VOLT/DIV : 100 mV (With the 10:1 probe in use)
TIME/DIV : 500 ns
To watch the eye pattern, set the oscilloscope to AC range and
increasethe vertical sensitivity ofthe oscilloscope foreasywatch-
ing.
5. Stop revolving of the disc motor by pressing the xbutton.
oscilloscope
(AC range)
+
–
MAIN board
TP601 (RF)
TP418 (GND)
2 k
Ω
RF level
0.4 to 0.6 Vp-
p
C404
D403
KA
R305
R489
VDR304
VDR303
R410
C301
CN503
C449
+
R604
R601
R603
C601
C603
R602
C
606
C
605
C448
C604
55
C454
C453
R469
C452
FB101
VDR101
VDR201
FB301
FB201
R303
R304
C102
C202
R102
R202
R101
R201
1
12
24
13
IC404
VDR301
J301
LINE OUT
(OPTICAL)
1
15
OPTICAL
PICK-UP
BLOCK
DAX-25E
TP601 (RF)
TP418
(GND)

D-EJ855
1010
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM –MAIN Section (1/2) –
RF AMP,
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR,
D-RAM CONTROLLER
IC601
DIGITAL
OUT
LPF
SIGNAL
PROCESSOR
BLOCK
MEMORY
CONTROLLER,
BUS BOOST
BLOCK
SERVO
BLOCK
MDS
MDP
SENS
SCOR
SDTO
XTAI
XTAO
RFAC
XSOE
R4M
XLAT
CLOK
DOUT
XRAS
XWE
XCAS
AOUT1 AOUTL,
AOUTR
HPL,
HPR
AOUT2
LRMU
FOK
XRST
RFDC
B
A
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
D0-D3
A0-A10
WDCK
WFCK
XTAO
XTAI
E
F
89 F
92
91
A
B
88
81
RFDC
RFAC
E
LASER DIODE
OPTICAL PICK-UP BLOCK
DAX-25E
A
A
B
RF
E
F
B
RF
E
F
PD
PD
LD
LD
DETECTOR
VCC
X601
16.9344MHz
A
B
90
2, 3, 24, 25
9 –12, 15 –19, 21, 8
5
4
23
D-RAM
IC602
D1 –D4A0 –A10
DOUT
XRAS
XWE
XCAS
D
E
G
H
100
99
SFDR
SRDR
96
95
FFDR
FRDR
98
97
17
18
40
41
21
22
34
32
38
36
26
24
TFDR
TRDR
M901
(SLED)
(FOCUS)
(TRACKING)
FI2
RI2
FI1
RI1
FI4
FI4
FO2
RO2
FO1
RO1
FO4
RO4
FOCUS/TRACKING COIL DRIVER
SLED MOTOR DRIVER
IC403 (1/2)
26
2422 32 232021
9
12
16 14 15181711
PREDRIVER
102 MDS
103 MDP
27
SCOR
104
2
3
24
1
18
19
20
11
13
15
21
74
72
17
C176
FOK R4M
40
HOLD
28
CLOSE
XSOE WDCK SDTD SENS CLOK XLAT
XSOE
XIN
GRSCOR
FOK
MSDTO
SCOR
MSDTI
MSCK
XLAT
+BUFFER
IC405
SYNC
8
9
7
XRST
DATA
XLTCH
CLK
PWM
23
APWM
XBRAK
FG
+
+
U1
V1
W1
COM
U
V
W
VG
VG
SPINDLE MOTOR DRIVER
IC404
M902
(SPINDLE)
FG/FGSEL
XDRVLT
C
HOLD
OFF
VCPU B+
SL806
(OPEN)
VCPU B+
SYSTEM CONTROLLER
IC801 (1/3)
SDTO
SCK
J
L
K
SYNC
2-AXIS
DEVICE
CPU
INTERFACE
S801
HOLD
61
28
62
4, 3, 6, 5
116 –113, 17 –15, 13 –11, 117
51
56
48
47
1
2
9
LRMU
XRST
HPL
HPR
F
43
44
•SIGNAL PATH
: CD PLAY (ANALOG OUT)
: CD PLAY (OPTICAL OUT)
V
UW
6
CONTROLLER,
H BRIDGE DRIVER
2
M
CONTROL
CIRCUIT
65
13
SYSM
AMUTE
25
S804
OPEN
VCPU B+
OPSTB
OPGSW
78
77 HG XSTB
HG GUP
(Page 12)
(Page 12)
(Page 12)
(Page 11)
(Page 11)
(Page 11)
(Page 11)
(Page 11)
(Page 12)
(Page 12)
(Page 12)

D-EJ855
1111
5-2. BLOCK DIAGRAM –MAIN Section (2/2) –
G
6 24 79 30 2625
B+ SWITCH
Q301
LINE MUTING
CONTROL SWITCH
Q302
P21
AD SEL
XRST
BEEP
AD RMKEY
AD KEY
SYSTEM CONTROLLER
IC801(2/3)
VCC3
(LINE OUT JACK)
J301
LINE OUT
(OPTICAL)
OPTICAL
TRANSCEIVER
31
TSB
VCPU 2V
TSB
RMKEY
GND
J302
i
S805-809
4
3
2
1
VCPU B+
IN_L
IN_R
HEADPHONE AMP
IC301
13
12
OUT_L
OUT_R
BEEPO_L
BEEPO_R
4
9
PW_SW
MUTE_SW
17
BEEP
15
PW SW
BEEP
MUTE SW
18
SL807
(TEST)
HPL
HPR
D
F
H
E
DOUT
AOUTL
AOUTR
LRMU
XRST
MUTING
Q303
•SIGNAL PATH
: CD PLAY (ANALOG OUT)
: CD PLAY (OPTICAL OUT)
3
10
39
AVLS
LIMIT
NORM
VCPU B+
S802
AVLS
38
ESP
2
1
VCPU B+
S803
G•PROTECTION
(Page 10)
(Page 10)
(Page 10)
(Page 10)
(Page 10)

D-EJ855
1212
LINEAR
CONSTANT CURRENT,
CONSTANT VOLTAGE
CHARGING BATTERY
CHARGE CIRCUIT
CHARGING BATTERY
VOLTAGE DETECTOR
CIRCUIT
PRE-DRIVER
SWITCHING
POWER
CIRCUIT
CHARGE ON
SWITCH
Q403
SWITCHING
POWER
CIRCUIT
LINEAR
REGULATOR
INTERFACE
VG
POWER
CIRCUIT
CLK
OR OSC
45
46
43
65
42
CHGSW
RF1
INM1
RF41
RF41
RF4
RF4
VCC1
VCPU
VLGO3
VCC2
VCC1
INM4
INM4
APCREF
APCREF
DTC3
VREF
PAPC
PAPC
WAKE
LATCH
DATA
CLOCK
DATA
CLOCK
VLGO4
SYNC
14
13
6
5
3
12
16
51
15
56
61
50
STNG
57
7
79
1
73
58
11
SDTO
SCK
PD
LD
J
L
K
B
A
SYNC
DTC2
DTC3
INP2
INP2
RS1
DC IN
VIN
VCC3
VCPU
RF1
INM1
RS1
CHGSW
VIN
DCIN
VCC3
75
VCC2
74
DTC2
53
LATCH
WAKE
VLGO2
BATM1
CHGMNT
BATM2
CHGMNT
VLGO4
VLGO2
VLG3
VG
L5
9
8
VG
L5
BATM1
RSTB
75
XPOWLT
21
AD CHGMNT
27
AD DCINMNT
33
EXTBATT
22
AD BATMNT
80
LEDDISP
29
PPG
70
AGCPWN
SYSTEM CONTROLLER
IC801 (3/3)
VCC1
VCC3
49 VDRAM
10
NC
VCPU B+
VCC2
D801
CHARGE
66
XWAKE
8
RESET
7
BATVCC ON
76
CHGGND ON
D405
D403
RECHARGEABLE
BATTERY
NC-6WM
2PCS. 2.4V
–+
J401
EXT BATT
DC IN 4.5V
VG
CHARGE
C
POWER CONTROL
IC403 (2/2)
VREF
SAW
GEN.
60
BATM2 59
B+ SWITCH
IC402
B+ SWITCH
Q416, 417
CHARGE
CONTROL
Q406, 415
RIPPLE
FILTER
Q408
B+ SWITCH
Q421, 422
48
CHARGE ON
SWITCH
Q412
EXTERNAL BATTERY
DETECT
Q407
2
SWITCHING
Q419
RF3
78
SWITCHING
Q420
B+ SWITCH
Q418
69
VIN B+
(Page 10)
(Page 10)
(Page 10)
(Page 10)
(Page 10)
(Page 10)
5-3. BLOCK DIAGRAM –POWER SUPPLY Section –

D-EJ855
1313
2.0 Vp-p
950 ns
400 to 600
mVp-p
2.4 Vp-p
59.1 ns
2.5 Vp-p
236 ns
2IC601 w; (CLOK)
2.0 Vp-p
950 ns
2.0 Vp-p
950 ns
Note on Printed Wiring Board
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•z:Through hole.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• MAINboard is multi-layerprintedboard.However,the patterns
of intermediate-layer have not been included in the diagram.
Caution:
Pattern face side: Partson the pattern facesideseenfrom
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) theparts face are indicated.
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.
•C: panel designation.
•A: B+ Line.
• Powervoltageis dc 4.5V and fedwithregulated dc power
supply from DC IN jack (J401).
• Voltages and waveforms are dc with respect to ground in
no-signal conditions.
no mark : CD PLAY
• Voltagesare takenwith aVOM(Input impedance 10 MΩ).
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.
• Circled numbers refer to waveforms.
• Signal path.
J: CD PLAY (ANALOG OUT)
c: CD PLAY (OPTICAL OUT)
Note:
The components identi-
fied by mark 0or dotted
linewithmark 0are criti-
cal for safety.
Replace only with part
number specified.
Note:
Lescomposantsidentifiéspar
une marque 0sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.
5-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
3IC601 es (R4M)
4IC601 rk (XTAO)
5IC601 if (RFAC) (CD play mode)
6IC601 ik (RFDC) (CD play mode)
7IC403 qd (CLOK)
8IC801 2(XIN)
2.5 Vp-p
236 ns
400 to 600
mVp-p
•Waveforms
1IC404 9(CLK)
9IC801 qk (MSCK)
2.0 Vp-p
950 ns

D-EJ855
1414
C404
D403
KA
R305
R489
VDR304
VDR303
R410
C301
CN503
C449
+
R604
R601
R603
C601
C603
R602
R606
R614
C611
R607
C612
R615
R608
C613
C602 R619
R605 C606
C605
C448
R618
R613
R612
C604
R610
R611
C609
C455
C454
C453
R469
C452
FB101
VDR101
VDR201
FB301
FB201
R303
R304
C102
C202
R102
R202
R101
R201
1
12
24
13
IC404
1
120
30
31
60
6190
91
IC601
R609
C614
R622
C626
R632
R631
R630 R629 R628
R627
C304
C305
C303
+
C302
VDR803
R803
R203
R492
R204
C204
C205
R205
C207
C206
R208
112
24 13
IC301
R806
C803
IC801
1
20
21
40
60
41
80
61
R307
R820
R310
C311
D306
AK
D305
KA KA
D304
AK
D307
FB303
FB304
C313
R309
R308
VDR102
FB403
KA
D303
R207
R107
VDR202
R401
R428
C403
R482
R409
IC402
14
85
R415
C406
E
C
B
Q406
R414
C468
R465
R463
2B 1B
E
R460
R461
C469
C443
KA
D405
R481 R480
C445
C465
R454
C439
C434
C431
R450
R455
R447
C438
C437
R449
C436
C442
R448
R425
AK
D404
R459
R446
R424
R457 R456
R452
C435
C429
R426
Q407
BCE
R429
VDR401
C409
R420
C417
R441
R423
R422
C423
R445
C421
R442
R443
1
20
21
40
41
60
61 80
C416
R432
R440
C
Q417
SDG
Q415
C414
R483
BE
6
4
1
3
Q416
R484
E
C
B
Q403
1E
1B 2C
1C 2B
2E
R419
Q419
2E
2B 1C
2C 1B
1E
R490 R491
R485
Q418
Q420
R487
VDR301
R486
R436
C418
IC403
Q421
4 6
3 1
R488
2C 1C
Q422
D401
AK
C405
2E
2B 1C
2C 1B
1E
R416
R413
C412
C424
+
C413
+
R437
C419
R435
R474
R813
R808
C811
C810
C804
R458
C807
C805 C809
R812
R811
C808
R805
R804
R801
R802
C801
C802
C623
R626
R634
C622
R105
R206
R106
R108
R103
C104
C106 C105
R104
R625
C625
C619
C814
R815
R816
R817
R814
R818
C618
C812
R821
R620 C615
R623
C608
R621 C457
R471
R470
C456
R468
R467
C447
R301
R302
C501
R478
R479
R477
C433
+
C466
+
C432
+
R439
C425
C426
+
L405
L403
L411
L410
C444
+
L401 L408
L404
L402
L406
L409
C446
+
C422
+
FB404
FB405
R807
VDR804
FB803
D803
K
AA
D804
D408
AK
SL806
(OPEN)
C440
+
C401
+
C462
C464
FB202 FB102
FB302
C312
S806
S807
S805
S809
S808
D801
R819
X601
C208
+
C108
+
C310
C309
C306
L303
S802
S803
R418
C408
R417
C806
+
FB801
VDR801
VDR601
L604
C624
+
IC602
1
13
R635
26
14
FB602
C620
L602
FB601
C621 +
L413
C607
+
D601
C617 +
C107
D406
AK
C450
L503
L501
L502
C616
+
AK
D407
C451
Q302
1E
1B 2C
1C 2B
2E
Q303
C502
+
Q414
BC
E
BCE
Q301
FB402
C610
C411
+
S804
Q405
J302
R444
R421
IC405
1
3
45
CN501
CN502
VDR403
3
1
4
6
FB401
Q412
i
1-682-611-
11
(11)
M901
(SLED)
M
RED
BLK
2
1
4
1
M902
(SPINDLE)
V
W
U
BLK
ORG
WHT
RED
4
1
MAIN BOARD
(COMPONENT SIDE)
A
B
C
D
E
F
G
H
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1-682-611-
11
(11)
MAIN BOARD
(CONDUCTOR SIDE)
J401
EXT BATT
DC IN 4.5V
–+
12
2C
1B
1E
2E
2B
1C
CHARGE
VOL –
VOL +
x/CHARGE
.
> N
SL808
SL809
SL810
D805
SL807
(TEST)
S802
AVLS
LIMIT
NORM
S803
G • PROTECTION
2
1
EB
C
OPEN
D601,
D804, 805
RECHARGEABLE
BATTERY
NC-6WM
2PSC. 2.4V
S801
HOLD
HOLD
OFF
J301
LINE OUT
(OPTICAL)
1
15
OPTICAL
PICK-UP
BLOCK
DAX-25E
I
J
TP418
(GND)
TP601
(RF)
C307
+
5-5. PRINTED WIRING BOARD
D303 H-13
D304 H-13
D305 H-13
D306 H-13
D307 H-13
D401 J-9
D403 B-12
D404 I-11
D405 I-11
D406 C-3
D407 D-2
D408 H-3
D601 E-2
D801 E-1
D803 G-4
D804 G-3
D805 G-4
IC301 F-13
IC402 I-12
IC403 H-10
IC404 D-13
•Semiconductor Location
IC405 D-2
IC601 E-12
IC602 E-4
IC801 G-12
Q301 C-3
Q302 C-2
Q303 C-2
Q403 H-9
Q405 H-3
Q406 H-12
Q407 J-10
Q412 B-3
Q414 C-3
Q415 H-9
Q416 I-9
Q417 H-9
Q418 H-10
Q419 G-9
Q420 G-10
Q421 I-12
Q422 I-12
Ref. No. LocationRef. No. Location

D-EJ855
1515
5-6. SCHEMATIC DIAGRAM – MAIN Board (1/3) – • See page 13 forWaveforms. •See page 18 for IC Block Diagrams.
(Page 16)
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replaceonlywithpart number specified.
Lescomposantsidentifiésparune marque 0sont
critiques pour la sécurité. Ne lesremplacer que
par une pièce portant le numéro spécifié.
(Page 17)

D-EJ855
1616
5-7. SCHEMATIC DIAGRAM – MAIN Board (2/3) – • See page 13 forWaveform.
(Page 15)
(Page 17)

D-EJ855
1717
IC801
T5AJ4-3HE0
5-8. SCHEMATIC DIAGRAM – MAIN Board (3/3) – • See page 13 forWaveforms.
(Page 16)
(Page 15)

D-EJ855
1818
•IC Block Diagrams
IC301 TA2152FN (EL)
+ –
24
OUT ADJ
23
BIAS IN
22
RF IN
21
C-AMP SW
20
GND
19
BIAS OUT
18
BEEP IN
17
MUTE SW
16
PW SW
15
MUTE TC
14
VCC1
13
INB
1
NC
2
NC
3
BEEP OUTB
4
OUTB
5
EQB
6
OUTC
7
PW GND
8
EQA
9
OUTA
10
BEEP OUTA
11
VCC2
12
INA
+ –
BIAS
C-AMP SW BEEP PW/MUTE SW
PWA PWC PWB
IC404 TB2127AFN (EL)
+
–
CONTROL
+
–
+
–
+
–
TRIANGULAR
WAVE
GENERATING
INTERFACE
PRE-DRIVER
VC
1SYNC
2XBRK
3FG
4VC
5DGND
6XRST
7DATA
8XLAT
9CLK
10VDU
11U
12PGUV
24 PWM
23 APWM
22 AGND
21 VG
20 COM
19 UI
18 VI
17 WI
16 PGW
15 W
14 VDVW
13 V
5-9. IC PIN FUNCTION DESCRIPTION
•IC403 TB2130F (FOCUS/TRACKING COIL DRIVER, SLED MOTOR DRIVER, POWER CONTROL)
Pin No. Pin Name I/O Description
1 VREF I Reference voltage input terminal
2RF41 O Power supply 4 (APC) section operational amplifier 1 output
3PAPC I Power supply 4 (APC) section operational amplifier 1 non-invert input
4 VINDET I VIN detection signal input terminal Not used (open)
5RF4 O Power supply 4 (APC) section operational amplifier 2 output
6INM4 I Power supply 4 (APC) section operational amplifier 2 invert input
7 APCREF I AGC control pulse signal input from the system controller (IC801)
8L5—Connected to the inductor for VG
9VGO
VG output terminal
10 GND —Ground terminal
11 SYNC I 176.4 kHz clock signal input from the CXD3029R (IC601)
12 WAKE I Wakeup control signal input from the system controller (IC801) (for system standby reset)
“L”: wakeup The stop status is reset with the falling edge of input signal
13 CLOK I Serial data transfer clock signal input from the system controller (IC801)
14 DATA I Serial data input from the system controller (IC801)
15 LATCH I Serial data latch pulse signal input from the system controller (IC801)
16 RSTB O System reset signal output to the system controller (IC801) “L”: reset
For several hundreds msec. after the power supply rises, “L”is output, then it changes to “H”
17 FI2 I Sled servo drive signal (+) input from the CXD3029R (IC601)
18 RI2 I Sled servo drive signal (–) input from the CXD3029R (IC601)
19 FI3 I Not used (fixed at “L”)
20 RI3 I Not used (fixed at “L”)
21 FI4 I Tracking servo drive signal (+) input from the CXD3029R (IC601)
22 RI4 I Tracking servo drive signal (–) input from the CXD3029R (IC601)
23 VD4 I Power supply input terminal for tracking servo drive
24 RO4 O Tracking coil drive signal (–) output
25 MGND4 —Ground terminal (for tracking servo drive)
26 FO4 O Tracking coil drive signal (+) output
27 VD34 I Power supply input terminal for tracking servo drive
28 RO3 O Not used (open)
29 MGND3 —Ground terminal
30 FO3 O Not used (open)
31 VD23 I Power supply input terminal for sled servo drive
32 RO2 O Sled motor (M901) drive signal (–) output
33 MGND2 —Ground terminal (for sled servo drive)
34 FO2 O Sled motor (M901) drive signal (+) output
35 VD12 I Power supply input terminal for focus servo drive and sled servo drive
36 RO1 O Focus coil drive signal (–) output
37 MGND1 —Ground terminal (for focus servo drive)
38 FO1 O Focus coil drive signal (+) output
39 VD1 I Power supply input terminal for focus servo drive
40 FI2 I Focus servo drive signal (+) input from the CXD3029R (IC601)
41 RI2 I Focus servo drive signal (–) input from the CXD3029R (IC601)
42 CHGSW O Battery charge control transistor drive signal output
43 RS1 I Battery charge current detection terminal
44 INP1 I Battery charge circuit error amplifier non-invert input terminal for rechargeable battery
Not used (open)

19
D-EJ855
Pin No. Pin Name I/O Description
45 INW1 I Battery charge circuit error amplifier invert input for rechargeable battery
46 RF1 O Battery charge circuit error amplifier output for rechargeable battery
47 VOUT1 O VIN power supply circuit control transistor drive signal output terminal Not used (open)
48 DCIN I DCIN (AC adapter power supply) detection terminal
49 VDRAM O VDRAM output to the system controller (IC801)
50 VCPU I VCPU input terminal
51 VCC1 O VCC1 output terminal
52 DFLAY —Constant terminal at the VCC1 control
53 DTC2 —Power supply 2 (VCPU) duty setting terminal
54 INM2 I Power supply 2 (VCPU) operational amplifier invert input
55 RF2 O Power supply 2 (VCPU) operational amplifier output
56 INP2 I Power supply 2 (VCPU) operational amplifier non-invert input
57 STNG —Connected to the external transistor for power supply 2 (VCPU)
58 CHGMNT O Battery charge voltage detection signal output to the system controller (IC801)
59 BATM2 I Lower rechargeable battery minus terminal
60 BATM1 I Upper rechargeable battery minus terminal
61 VLGO2 O Power supply 2 (VCPU) output terminal
62 L2L —Connected to the inductor for power supply 2 (VCPU)
63 PGND2 —Ground terminal (for power supply 2 (VCPU))
64 L2H —Connected to the inductor for power supply 2 (VCPU)
65 VIN I VIN input terminal for power supply 4
66 L4L —Connected to the inductor for power supply 4 (VAPC)
67 PGND4 —Ground terminal (for power supply 4 (VAPC))
68 L4H —Connected to the inductor for power supply 4 (VAPC)
69 VLGO4 O Power supply 4 (VAPC) output terminal
70 L3L —Connected to the inductor for power supply 3 (VDAC)
71 PGND3 —Ground terminal (for power supply 3 (VDAC))
72 L3H —Connected to the inductor for power supply 3 (VDAC)
73 VLGO3 O Power supply 3 (VDAC) output terminal
74 VCC2 I VCC2 input terminal for VCC3
75 VCC3 O VCC3 (VDOJ) output terminal
76 INP3 I Power supply 3 (VDAC) operational amplifier 1 invert input
77 INM3 I Power supply 3 (VDAC) operational amplifier 1 non-invert input
78 RF3 O Power supply 3 (VDAC) operational amplifier output and connected to the external transistor for
power supply 3 (VDAC)
79 DTC3 —Power supply 3 (VDAC) duty setting terminal
80 DTC4 —Power supply 4 (VAPC) duty setting terminal

20
D-EJ855
•
Pin No. Pin Name I/O Description
1 XRAS O Row address strobe signal output to the D-RAM (IC602)
2XWE O Data input enable signal output to the D-RAM (IC602)
3 to 6 D1, D0, D3, D2 I/O Two-way data bus with the D-RAM (IC602)
7, 8 TEST1, TEST2 O Output terminal for the test Not used (open)
9 XCAS O Column address strobe signal output to the D-RAM (IC602)
10 WFCK O WFCK signal output terminal Not used (open)
11 to 13 A9 to A7 O Address signal output to the D-RAM (IC602)
14 DVSS —Ground terminal (for D-RAM interface)
15 to 17 A6 to A4 O Address signal output to the D-RAM (IC602)
18 XRDE I D-RAM read enable signal input terminal Not used (open)
19 VDD0 —Power supply terminal (digital system)
20 CLOK I Serial data transfer clock signal input from the system controller (IC801)
21 SDTO I Serial data input from the system controller (IC801)
22 SENS O Serial data output to the system controller (IC801)
23 XLAT I Serial data latch pulse signal input from the system controller (IC801)
24 XSOE I Serial data output enable signal input from the system controller (IC801)
25 SYSM IAnalog muting on/off control signal input from the system controller (IC801)
“H”: muting on
26 WDCK O GRSCOR signal output to the system controller (IC801)
27 SCOR O Subcode sync (S0+S1) detection signal output to the system controller (IC801)
28 XRST I Reset signal input from the system controller (IC801) “L”: reset
29 PWMI I Spindle motor external control signal input terminal Not used (open)
30 XQOK I Subcode Q OK signal input terminal Not used (open)
31 XWRE I D-RAM write enable signal input terminal Not used (open)
32 R4M O System clock output to the system controller (IC801)
33 VSS0 —Ground terminal (digital system)
34 SQCK I SQSO readout clock signal input terminal Not used (fixed at “H”)
35 SCLK I SENS serial data read clock signal input terminal Not used (fixed at “H”)
36 SQSO O CD text data output terminal Not used (open)
37 XEMP O D-RAM read prohibition signal output terminal Not used (open)
38 XWIH O D-RAM write prohibition signal output terminal Not used (open)
39 SBSO O Subcode P to W serial data output terminal Not used (open)
40 EXCK O SQSO readout clock signal output terminal Not used (pull down)
41 XSTL I Input terminal for the system clock frequency setting
“L”: 16.9344 MHz, “H”: 33.8688MHz (fixed at “L”in this set)
42 HVSS —Ground terminal (for headphone)
43 HPL O PDM signal output for L-ch headphone to the headphone amplifier (IC301)
44 HPR O PDM signal output for R-ch headphone to the headphone amplifier (IC301)
45 HVDD —Power supply terminal (for headphone)
46 XVDD —Power supply terminal (for master clock)
47 XTAI I System clock input terminal (16.9344 MHz)
48 XTAO O System clock output terminal (16.9344 MHz)
49 XVSS —Ground terminal (for master clock)
50 AVDD1 —Power supply terminal (analog system)
51 AOUT1 O L-ch analog audio signal output
52 VREFL O L-ch reference voltage output terminal
53, 54 AVSS1, AVSS2 —Ground terminal (analog system)
C601 CXD3029R
(RF AMP, DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, D-RAM CONTROLLER)