Sony Walkman D-E888, D-E925, Walkman D-E999, Walkman D-EJ825, Walkman D-EJ925 Service Manual
D-E888/E999/EJ825/EJ925
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SERVICE MANUAL
Ver 1.0 2000. 10
TEL 13942296513 QQ 376315150 892498299
Photo: D-E999
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM-3021EBG
Optical Pick-up Name DAX-21EG
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US Model
Canadian Model
AEP Model
UK Model
E Model
Chinese Model
D-EJ825/EJ925
Tourist Model
D-E888/E999
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System
Compact disc digital audio system
Laser diode properties
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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 conver sion
1-bit quartz time-axis control
Frequency response
20 - 20 000 Hz
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 mWat 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
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
• Two Sony NH-14WM rechargeable batteries:
2.4 V DC
• Two LR6 (size AA) batteries: 3 V DC
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SPECIFICATIONS
• AC power adaptor (DC IN 4.5 V jack):
US/Canadian model: 120 V, 60 Hz
AEP/E13 model: 220 - 230 V, 50/60 Hz
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UK model: 230 - 240 V, 50 Hz
Tourist model: 100 - 240 V, 50/60 Hz
Hong Kong model: 220 V, 50/60 Hz
Chinese model: 220 V, 50 Hz
Korean model: 220 V, 60Hz
• Sony DCC-E84 car battery cord for use on
car battery: 4.5 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
Two NC-6WM 15 14
(charged for
about 4 hours**)
Two NC-14WM 29 28
(charged for
about 4 hours**)
External battery case 50 48
(two alkaline batteries)
Rechargeable batteries 65 61
NC-6WM and external
battery case (two alkaline
batteries)
Rechargeable batteries 80 76
NH-14WM and external
battery case (two alkaline
batteries)
* Measured value by the standard of EIAJ
(Electronic Industries Association of Japan).
** Charging time varies depending on how the
rechargeable battery is used.
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“1” “2”
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Operating temperature
5°C - 35°C (41°F - 95°F)
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Dimensions (w/h/d) (excluding
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projecting parts and controls)
Approx.
127.2 × 18.4 × 135.6 mm
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Approx. 127.2 × 15.4 × 135.6 mm
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⁄8 × 5⁄8 × 5
(5
Mass (excluding accessories)
Approx. 175 g (6.2 oz) (D-E888/EJ825)
Approx. 155 g (5.5 oz) (D-E999/EJ925)
AC power adaptor (1)
Headphones/earphones with remote control (1)
Rechargeable batteries (2)
Battery carrying case (2)
Carrying case (1)
External battery case (1)
AC plug adaptor (1)*
* Supplied with Tourist model.
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
Design and specifications are subject to change
without notice.
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⁄8 in.) (D-E999/EJ925)
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PORTABLE CD PLAYER
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TABLE OF CONTENTS
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1. SERVICING NOTES ............................................... 3
2. GENERAL ................................................................... 6
3. DISASSEMBLY ......................................................... 7
4. ELECTRICAL CHECKING .................................. 11
5. DIAGRAMS
5-1. Block Diagram – MAIN Section (1/2) – ........................ 15
5-2. Block Diagram – MAIN Section (2/2) – ........................ 17
5-3. Block Diagram – POWER SUPPLY Section – .............. 19
5-4. Printed Wiring Board – MAIN Board (Suffix-11) – ...... 21
5-5. Printed Wiring Board – MAIN Board (Suffix-12) – ...... 23
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5-6. Schematic Diagram – MAIN Board – ............................ 25
5-7. IC Pin Function Description ........................................... 30
6. EXPLODED VIEWS ................................................ 32
7. ELECTRICAL PARTS LIST ............................... 35
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This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
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the rear exterior.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
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.
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.
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Discrimination of MAIN board
– MAIN Board (Component Side) –
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1-678-954-11
or
1-678-954-12
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ATTENTION AU COMPOSANT AYANT RAPPORT
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.
À LA SÉCURITÉ!
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SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMA TIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
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OPERATION. REPLACE THESE COMPONENTS WITH
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SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
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SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
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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.
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-
TEL 13942296513 QQ 376315150 892498299
11) issued separately before replacing the optical pick-up block.
Note and specifications required to check are given below.
• FOK output: IC601 eg pin
When checking FOK, remove the lead wire to disc motor.
• RF signal P-to-P value: 0.4 to 0.6 Vp-p
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Precautions for Checking Emission of Laser Diode
Laser light of the equipment is focused by the object lens in the
optical pick-up so that the light focuses on the reflection surface
of the disc. Therefore, be sure to keep your eyes more then 30 cm
apart from the object lens when you check the emission of laser
diode.
Laser Diode Checking Methods
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S801. (push switch type)
The following two checking methods for the laser diode are 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.
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u button.
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S801
lever, detection
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lever, detection
Fig. 1 Method to push the S801
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MAIN board
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SERVICE MODE
In the Service mode, this set can check the following.
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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 (S801)...... OFF
Solder bridge at TAP802 (OPEN) ......... OPEN
[ALVS] switch (S803) ........................... NORM
[HOLD] switch (S804) .......................... OFF
[G-PRO] switch (S805)......................... 1
3) Short the solder bridge at the TAP801 (TEST) on the Main
board (see Fig. 2).
4) Turn the Power on.
TEL 13942296513 QQ 376315150 892498299
– MAIN Board (Component side) –
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(OPEN/CLOSE/ DETECT)
S801
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TAP802
(OPEN)
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TAP801
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(TEST)
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2. Operation in Service Mode
When the Service mode is set, the LCD on the remote commander
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displays the following.
Remote commander LCD display
Microcomputer
version display
All lit
All off
Microcomputer
version 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.
u button on the set
•
Focus ON
Tracking/Thread servo OFF
• x button on the set and remote commander
All servos (Focus/Tracking/Thread) OFF
• > / . buttons on the set and > / . knobs on remote
commander
Optical pickup movement (outward or inward)
Tracking/Thread servo OFF
[PLAYMODE] button on remote commander (CLV speed
•
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• [PRT/ENT] buttons on remote commander
• [VOL+] / [VOL--] buttons on the set and [VOL+] / [VOL--]
• [SOUND] button on remote commander
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becomes 1 to 4 times each time the button is pressed)
Tracking/Thread servo ON
Tracking gain up mode
knobs on remote commander
2-step volume setting
Servo auto adjustment (In play mode, press this button before
pressing the [PLAYMODE] button on remote commander)
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888
%B025
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Uncertain
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BASS12
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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 TAP801 (TEST) on the Main
board.
Note: Remove the solder completely.
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5.Error Rate Check Display
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The C1 Error Rate Check Display mode becomes active if the
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following operation is performed during the operation in the normal
mode.
1) Make sure that the Power is not turned on.
2) Fix the open/close detection switch (S801) on the Main board
with a tape so that the switch is turned on.
Or, short the solder bridge at the TAP802 (OPEN) on the Main
board (see Fig. 2 on page 4).
3) Turn the Power on, then set the CD to activate the Play mode.
4) Short the solder bridge at the TAP801 (TEST) on the Main
board (see Fig. 2 on page 4).
5) Press the [DISPLAY] button on remote commander, and the
C1 Error Rate Check Display mode becomes active, and the
remote commander LCD displays the following.
OK is displayed when the error rate is 0 to 99/7350, or NG is
displayed when over 100/7350.
Remote commander LCD display (OK display)
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Remote commander LCD display (NG display)
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The remote commander LCD displays the following when no
data is read such as in the skip mode.
Remote commander LCD display
---:--
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Note: Press again the
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and the remote commander LCD displays the time counted
down from total time of CD.
Press once more the [DISPLAY] button on remote commander,
and the remote commander LCD returns to the display of the
music being played at present.
6) Turn the Power off.
7) Open the solder bridges at the TAP801 (TEST) and TAP802
(OPEN) on the Main board.
Note: Remove the solder completely.
[DISPLAY] button on remote commander,
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SECTION 2
GENERAL
Getting started
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Locating the controls
For details, see pages in parentheses.
CD player (front)
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CD player (inside)
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q; Battery
compartment
(pages 19)
qa G-PRO (G-
PROTECTION)
switch
(page 13)
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1 EXT BATT (external battery)/
2 LINE OUT (OPTICAL) jack
3 VOL (volume) +/– buttons
4 ./> (AMS/search)
5 u (play/pause) button
6 x (stop) /CHG (charge) button
7 i (headphones) jack
8 CHG (charge)/HOLD lamp
9 OPEN switch
CD player (rear)
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DC IN 4.5 V (external power
input) jack (pages 7, 19, 21)
(page 17)
(page 8)
buttons
(pages 8, 11, 12)
(page 8)
(pages 8, 16, 19)
(page 7)
(pages 15, 19)
(page 7)
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qs AVLS switch
(page 15)
qd HOLD switch
(page 15)
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Remote control
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qf Display
(pages 9, 11 - 15)
qg Rotary control
N/>: play, AMS/search (pages 8, 11, 12)
.: AMS/search (pages 8, 11, 12)
VOL +/–: Pull the control in the direction of the
arrow, and then turn it toward + or –. (page 8)
qj Clip
qk DISPLAY
button
(pages 13, 14)
ql PLAY MODE
button
(pages 10 - 12, 16)
w; RPT (repeat)/ENT
(enter) button
(pages 10 - 12)
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This section is extracted from
instruction manual.
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Note
Use only the supplied remote control. You cannot
operate this CD player with the remote control
supplied with other CD players.
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qh x (stop) button
wa HOLD switch
(page 15)
ws i (headphones) jack
(page 7)
wd X (pause) button
(page 8)
wf SOUND button
(page 14)
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(pages 8, 16)
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Getting started
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Using the carrying case
You can carry your player and its battery case together using the supplied carrying case. Insert
them into the proper places in the case as illustrated below
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• This set can be disassembled in the order shown below.
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Set Cabinet (Upper) Section Cabinet (Upper) Sub Assy, “Lid Sub Assy, Upper” (E888/EJ825 Model)
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SECTION 3
DISASSEMBLY
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Cabinet (Upper) Sub Assy, “Lid Sub Assy, Upper” (E999/EJ925 Model)
Main Board, Optical Pick-Up Section (CDM-3021EBG)
Setting The Battery Terminal Board (Relay) Lead Wire And
Motor Lead Wires
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Note: Follow the disassembly procedure in the numerical order given.
CABINET (UPPER) SECTION
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five screws (B2)
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claw
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screw (B2)
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three claws
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cabinet (upper) sectio
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Open the upper lid sub assy.
Note on installation cabinet (upper) section:
When installing cabinet (upper) section,
adjust the S805 and knob (AVLS).
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knob (AVLS)
S805
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spring (open)
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two screws (B2)
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CABINET (UPPER) SUB ASSY “LID SUB ASSY, UPPER” (E888/EJ825 MODEL)
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lid sub assy, upper
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plate, fulcrum
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cabinet (upper) sub assy
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CABINET (UPPER) SUB ASSY “LID SUB ASSY, UPPER” (E999/EJ925 MODEL)
13942296513
Open the upper lid sub assy.
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six tapping screws
(1.7
×
2.5)
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lid sub assy, upper
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two step screws
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Open the upper lid sub assy.
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two step screws
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