Sony D-EJ855 Service Manual

D-EJ855
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 k Recommended load impedance over 10 k
Headphones (stereo minijack)
Approx. 5 mW + Approx. 5 mW at 16 (Approx. 0.5 mW + Approx. 0.5 mW at 16
)*
*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 4.5 V 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
SERVICE MANUAL
Ver 1.3 2003.11
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
Austr alian 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 C 2003.11 Published by Sony Engineering Corporation
PORTABLE CD PLAYER
D-EJ855

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 W iring 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
On AC power adaptor
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
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.
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra­diation exposure.
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.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMA TIQUES 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.
2
SECTION 1

SERVICING NOTES

D-EJ855
About CD-Rs/CD-RWs
This CD player can play CD-Rs/CD-RWs recorded in the CD-D A format*, but playback capability may vary depending on the qual­ity of the disc and the condition of the recording device. * CD-DA is the abbreviation for Compact Disc Dig ital Audio. It is a recording standard used for the Audio CDs.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro­static 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 emis­sion, observe from more than 30 cm away from the objecti ve lens.
BEFORE REPLACING THE OPTICAL PICK-UP BLOCK
Please be sure to check thoroughly the parameters as par the Op­tical 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 0.6 Vp-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 screwdri ver having
a thin tip as shown in Fig.1.
3. Press the
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.
> N button.
S804
detection lever
detection lever
MAIN board
Fig. 1 Method to push the S804
3
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.
MAIN Board (Component Side)
R811
D803
C809
R807
SL807
(TEST)
R812
FB803
VDR8
C805
+
C440
+
C806
C807
C804
C464
SL806
(OPEN)
R808
C810
A
C811
K
A
D805
R813
2. Operation in Service Mode
When the Service mode is set, the LCD on the remote commander displays the following.
Remote commander LCD display
Microcomputer version display
All lit
Service mode
VD101
888
DDDD
BASS12
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 / . buttons on 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-out­side 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.
Fig. 2
Remote Commander LCD display
0000
(play mode)
x button on the set and remote commander All servos (focus/tracking/sled) off
> N / . buttons on 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
Remote Commander LCD display
Up0000
(For the rest, turn the power off and then turn it on again)
[VOL +] / [VOL --] buttons on the set and [VOL +] / [VOL --] knobs on remote commander 2-step volume setting
[PLAYMODE] button on remote commander CL V speed becomes 1 to 4 times each time the button is pr essed Tracking/sled servo on
4
Remote Commander LCD display
D-EJ855
010001
040004
(For the rest, turn the power off and then turn it on again)
[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 fol­lowing 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.
Remote Commander LCD display
(1 time)
(4 times)
0000
3) Press the [SOUND] button on the remote commander to make automatic adjustment.
4) Press the [PLAY MODE] button on the remote commander.
Remote Commander LCD display
010001
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.
Remote Commander LCD display
Er****
Note: In the play state, press the [SOUND] button on the remote com-
mander before pressing the [PLAY MODE] b utton. 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.
**** value 0000 to 0099 : OK more than 0100 : NG
5
D-EJ855
SECTION 2

GENERAL

This section is extracted from instruction manual.
Getting started
Locating the controls
For details, see pages in parentheses.
CD player (front)
1 EXT BATT (external battery)/
DC IN 4.5 V (external power input) jack (pages 7, 19, 21)
2 LINE OUT (OPTICAL) jack
(page 17)
3 VOL (volume) +*/– buttons
(page 8)
4 x (stop) /CHARGE button
CHARGE lamp (pages 8, 15, 16, 19)
5 .(AMS/search)> N*
(AMS/search/play) buttons (pages 7, 8, 12)
6 i (headphones) jack
(page 7)
7 OPEN switch
(page 7)
CD player (inside)
8 AVLS switch
(page 15)
9 G-PROTECTION
switch (page 13)
q; Battery
compartment (page 19)
*The button has a tactile dot to help you operate the CD player by touch.
4
CD player (rear)
qa HOLD switch
(page 15)
Remote control
qs Display
(pages 9, 11 - 15)
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)
qg Clip
qh DISPLAY
button (pages 13, 14)
qj PLAY MODE
button (pages 10 - 12)
qk RPT (repeat)/ENT
(enter) button (pages 10 - 12)
qf x (stop) button
(pages 8, 16)
ql HOLD switch
(page 15)
w; i (headphones) jack
(page 7)
wa X (pause) button
(page 8)
ws SOUND button
(page 14)
Note
Use only the supplied remote control. You cannot operate this CD player with the remote control supplied with other CD players.
Getting started
5
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.
6
6
• This set can be disassembled in the order shown below.
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/cm2 of torque.
(If tighten them too hard, portion
!
may get cracked.)

3-1. DISASSEMBLY FLOW

3-2. UPPER LID (M) SUB ASSY
3-3. CABINET (UPPER) SUB ASSY
3-4. MAIN BOARD,
SECTION 3

DISASSEMBLY

SET
(Page 7)
(Page 8)
OPTICAL PICK-UP SECTION (CDM-3325ES) (Page 8)
D-EJ855
Ver 1.1
Note: Follow the disassembly procedure in the numerical order given.

3-2. UPPER LID (M) SUB ASSY

7
D-EJ855
)
n
3-3. CABINET (UPPER) SUB ASSY
knob (GPRO)
3
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).
claw
2
four screws (B2)
3
claw
2
three screws (B2)
3
claw
5
battery terminal board (relay
6
spring (upper lid-2702)
S802
S803

3-4. MAIN BOARD, OPTICAL PICK-UP SECTION (CDM-3325ES)

1
cushion
2
two connectors (CN501, CN502)
7
two insulators
6
main board
1
cushion
5
flexible board (CN503)
8
optical pick-up section (CDM-3325ES)
7
insulator
4
cabinet (lower) assy
8
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
you hold up the optical pick-up section.
SECTION 4
p

ELECTRICAL CHECK

D-EJ855
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. Use YEDS-18 disc (P art 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 GPROTECTION switch : 1
Connecting and Checking Location:
MAIN Board (Component Side)
TP418 (GND)
J301
LINE OUT (OPTICAL)
TP601 (RF)
Focus bias Check
Condition:
Hold the set in horizontal state.
Connection:
MAIN board
TP601 (RF) TP418 (GND)
2 k
oscilloscope
(AC range)
+ –
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 > N button.
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
OPTICAL PICK-UP
BLOCK
DAX-25E
R601 R603
R602 C601 C603
D403
CN503
1
15
R604
KA
R410
C604
C448
606
605
R305
C404
C449
+
R489
12
1
VDR304
C301
IC404
VDR303
RF level
0.4 to 0.6 Vp-
To watch the eye pattern, set the oscilloscope to AC range and
FB201
VDR201
VDR301
R303
C202
FB301
R202
R304
R201
VDR101
24
FB101
R469
R101
C452 C453
C102
C454
13
R102
55
increase the vertical sensitivity of the oscilloscope for easy watch­ing.
5. Stop revolving of the disc motor by pressing the x button.
99
D-EJ855
SECTION 5

DIAGRAMS

5-1. BLOCK DIAGRAM – MAIN Section (1/2) –

DETECTOR
A
(Page 12)
B
(Page 12)
C
(Page 12)
OPTICAL PICK-UP BLOCK
LASER DIODE
PD
LD
(FOCUS)
2-AXIS
DEVICE
(TRACKING)
M902
(SPINDLE)
V
U
W
VG
SIGNAL PATH
: CD PLAY (ANALOG OUT)
: CD PLAY (OPTICAL OUT)
A
B
RF
E
F
VCC
DAX-25E
PD
OPSTB
OPGSW
LD
A
B
RF
E
F
VCPU B+
M901
M
(SLED)
U1
19
18
17
20
11
13
15
21
V1
W1
COM
U
V
W
VG
+
+
+
PREDRIVER
34 32
38 36
26 24
FOCUS/TRACKING COIL DRIVER
SLED MOTOR DRIVER
IC403 (1/2)
FO2 RO2
FO1
CONTROLLER,
RO1
H BRIDGE DRIVER
FO4 RO4
SPINDLE MOTOR DRIVER
IC404
CONTROL
CIRCUIT
RI2
RI1
RF AMP,
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR,
D-RAM CONTROLLER
IC601
A
92
B
91
RFDC
88
RFAC
81
E
89
F
90
FI2
17 18
FI1
40 41
FI4
21
FI4
22
SYNC
1
CPU
INTERFACE
XRST
6
PWM
APWM
XBRAK
DATA
CLK
XLTCH
24 23
2
FG
3
7 9 8
BUFFER
IC405
100
99
96 95
98 97
104 103 102
72
74
77
78
SFDR SRDR
FFDR FRDR
TFDR TRDR
C176 MDP MDS
FG/FGSEL
XDRVLT
HG XSTB
HG GUP
S801
HOLD
HOLD
OFF
SCOR
27
40
SCOR
HOLD
VCPU B+
WDCK
WFCK
MDS
XTAO
XTAI
RFAC
MDP XSOE SENS R4M XLAT CLOK SCOR SDTO
RFDC
SFDR
SRDR
FFDR FRDR TFDR
TRDR
SL806
(OPEN)
E
F B A
SIGNAL
PROCESSOR
BLOCK
SDTD
SENS
CLOK
161415181711
MSDTI
MSDTO
CLOSE
28
XLAT
MSCK
S804
OPEN
D-RAM
IC602
DOUT
AOUTL, AOUTR
HPL, HPR
LRMU
XRST
SYNC
D
E
F
G
H
J
(Page 11)
(Page 11)
(Page 11)
(Page 11)
(Page 11)
(Page 12)
SYSM
25
13
AMUTE
DOUT
D0-D3
A0-A10
XRAS
XWE
XCAS
XTAI
XTAO
AOUT1
AOUT2
HPL
HPR
LRMU
XRST
62
4, 3, 6, 5
116 – 113, 17 – 15, 13 – 11, 117
1 2 9
47
48
51
56
43
44
61
28
2, 3, 24, 25
9 – 12, 15 – 19, 21, 8
5
XRAS
4
XWE
23
XCAS
X601
16.9344MHz
D1 – D4A0 – A10
DIGITAL
OUT
MEMORY
CONTROLLER,
BUS BOOST
BLOCK
LPF
SERVO BLOCK
R4M
XSOE
WDCK
242232232021
26
2
12
XIN
XLAT
XSOE
GRSCOR
SYSTEM CONTROLLER
VCPU B+
FOK
FOK
65
9
FOK
IC801 (1/3)
SCK
SDTO
K
L
(Page 12)
(Page 12)
1010

5-2. BLOCK DIAGRAM – MAIN Section (2/2) –

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

5-3. BLOCK DIAGRAM – POWER SUPPLY Section –

(Page 10)
(Page 10)
(Page 10)
(Page 10)
(Page 10)
(Page 10)
VG
C
PD
A
SYNC
J
SDTO
L
SCK
K
LD
B
SYSTEM CONTROLLER
IC801 (3/3)
AD CHGMNT
XPOWLT
XWAKE
RESET
LEDDISP
PPG
AGCPWN
POWER CONTROL
IC403 (2/2)
PAPC
3
SYNC
11
DATA
14
CLOCK
13
VLGO4
69
INM4
6
RF4
5
RF41
2
75
66
8
80
29
70
NC
10
21
D801
CHARGE
VCC1
VCPU B+
VCC2
B+ SWITCH
Q418
SWITCHING
Q419
SWITCHING
Q420
VCC3
15
12
16
51
56
61
50
57
75
74
73
78
7
53 79
1
49
58
LATCH
WAKE
RSTB
VCC1
INP2
VLGO2
VCPU
STNG
VCC3
VCC2
VLGO3
RF3
APCREF
DTC2
DTC3 VREF
VDRAM
CHGMNT
VREF
CHGSW RF1 INM1 RS1
VIN
RF41
RF4 INM4 APCREF PAPC DTC2
DTC3 INP2 VCC1 VCC2 VCC3 VCPU
WAKE LATCH DATA CLOCK
LINEAR
CONSTANT CURRENT,
CONSTANT VOLTAGE CHARGING BATTERY
CHARGE CIRCUIT
SWITCHING
POWER CIRCUIT
SWITCHING
POWER CIRCUIT
LINEAR
REGULATOR
INTERFACE
CLK
OR OSC
SAW GEN.
CHARGING BATTERY VOLTAGE DETECTOR
CIRCUIT
PRE-DRIVER
VG
POWER
CIRCUIT
VLGO4
VLGO2
VLG3
VG
L5
BATM1
BATM2
CHGMNT
DC IN
BATM1 BATM2
RF1
INM1
DCIN
RS1
CHGSW
VIN
Q421, 422
VIN B+
CHARGE
CHARGE ON
SWITCH
Q412
B+ SWITCH
Q416, 417
RECHARGEABLE
BATTERY NC-6WM
2PCS. 2.4V
J401
EXT BATT
DC IN 4.5V
+
VG
9
L5
8
60 59
46
45
48
43
42
65
CHARGE
CONTROL
Q406, 415
B+ SWITCH
IC402
CHARGE ON
SWITCH
Q403
D405
RIPPLE
FILTER
Q408
D403
B+ SWITCH
AD DCINMNT
EXTBATT
AD BATMNT
CHGGND ON
BATVCC ON
27
33
22
76
7
EXTERNAL BATTERY
DETECT
Q407
1212
D-EJ855
400 to 600 mVp-p
2.0 Vp-p
950 ns

5-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board
X : parts extracted from the component side.
Y : parts extracted from the conductor side.
z
: Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)
Caution: Pattern face side: Parts on the pattern face side 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.
• MAIN board is multi-layer printed board. Howe ver , the patterns
: Through hole.
of intermediate-layer have not been included in the diagram.
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 and 1/ specified.
% : indicates tolerance.
C : panel designation.
Note:
The components identi­fied by mark 0 or dotted line with mark 0 are criti­cal for safety. Replace only with part number specified.
A : B+ Line.
• Power v oltage is dc 4.5 V and fed with regulated dc power supply from DC IN jack (J401).
• Voltages and w av ef orms are dc with respect to ground in no-signal conditions. no mark : CD PLAY
• V oltages are taken with a V OM (Input impedance 10 M). Voltage variations may be noted due to normal produc­tion tolerances.
• Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal produc­tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J : CD PLAY (ANALOG OUT) c : CD PLAY (OPTICAL OUT)
4
Note:
Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié.
W or less unless otherwise

Waveforms

1 IC404 9 (CLK)
950 ns
2 IC601 w; (CLOK)
950 ns
3 IC601 es (R4M)
2.0 Vp-p
2.0 Vp-p
6 IC601 ik (RFDC) (CD play mode)
7 IC403 qd (CLOK)
2.0 Vp-p
950 ns
8 IC801 2 (XIN)
236 ns
4 IC601 rk (XTAO)
59.1 ns
5 IC601 if (RFAC) (CD play mode)
2.5 Vp-p
2.4 Vp-p
2.5 Vp-p
236 ns
9 IC801 qk (MSCK)
400 to 600 mVp-p
1313
D-EJ855

5-5. PRINTED WIRING BOARD

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