Sony D-E220, D-E225, D-E226CK Service manual
D-E220/E225/E226CK
SERVICE MANUAL
Ver 1.0 2000. 12
(Photo: D-E220 (Silver))
SPECIFICATIONS
US Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM-3123EBA
Optical Pick-up Name DAX-23E
CD player
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.)
Error correction
Sony Super Strategy Cross Interleave Reed
Solomon Code
D-A conversion
1-bit quartz time-axis control
Frequency response
20 - 20,000 Hz +1/–3 dB
(measured by EIAJ CP-307)
Output (at 4.5 V input level)
Headphones (stereo minijack)
Approx. 12 mW + Approx. 12 mW
at 16 ohms
General
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-WMAA rechargeable
batteries: 2.4 V DC
• Two sony NH-WM2AA rechargeable
batteries: 2.4 V DC
• Two LR6 (size AA) batteries: 3 V DC
• AC power adaptor (DC IN 4.5 V jack):
120 V, 60Hz
D-E220/E226CK
Battery life (approx. hours) (EIAJ*)
Battery life varies depending on how the player is
used.
ESP OFF ESP ON
Two sony alkaline 25 24
batteries LR6(SG)
* Measured value by the standard of EIAJ
(Electronic Industries Association of Japan).
(When the unit is used on a flat and stable place.)
D-E225
Battery life (approx. hours) (EIAJ*)
Battery life varies depending on how the player is
used.
ESP OFF ESP ON
Two NC-WMAA 8 8
(charged
about 3 hours**)
Two NH-WM2AA 14.5 14
(charged
about 8 hours**)
Two sony alkaline 25 24
batteries LR6(SG)
* Measured value by the standard of EIAJ
(Electronic Industries Association of Japan).
(When the unit is used on a flat and stable place.)
** Charging time varies depending on how the
rechargeable battery is used.
– Continued on next page –
– 1 –
PORTABLE CD PLAYER
Dimensions (w/h/d) (without projecting
parts and controls)
Approx. 130 × 26.3 × 150.5 mm
1/8 × 1 1/16 × 6 in.)
(5
Mass (excluding accessories)
Approx. 205 g (7.3 oz.)
Operating temperature
5°C - 35°C (41°F - 95°C)
Supplied accessories
For the area code of the model you purchased,
check the upper left side of the bar code on the
package.
D-E220
Headphones (1)
D-E225
AC power adaptor (1)
Headphones with remote control (1)
Rechargeable batteries (2)
Battery carrying cases (1)
D-E226CK
AC power adaptor (1)
Headphones (1)
Car connecting pack (1)
Car battery cord (1)
Spiral tube (1)
Velcro tape (3)
Design and specifications are subject to change
without notice.
TABLE OF CONTENTS
1. SERVICE NOTE................................................................ 3
2. GENERAL
Playing a CD right away! ........................................................ 4
3. DISASSEMBLY
3-1. Lid, Battery Case, Cabinet Upper Assy .............................. 8
3-2. Lid Assy, Upper................................................................... 8
3-3. Main Board, MD Assy ........................................................ 9
4. ELECTRICAL ADJUSTMENTS
4-1. Focus Bias Check.............................................................. 10
5. DIAGRAMS
5-1. IC Pin Description............................................................. 11
5-2. Block Diagram –CD Section–........................................... 13
5-3. Block Diagram –Audio Section– ...................................... 15
5-4. Block Diagram –Power Supply Section–.......................... 17
5-5. Printed Wiring Board –Main Section– .............................. 19
5-6. Schematic Diagram –Main Section (1/2)–........................ 23
5-7. Schematic Diagram –Main Section (2/2)–........................ 25
5-8. IC Block Diagrams............................................................ 27
6. EXPLODED VIEWS
6-1. Cabinet (Front) Section ..................................................... 29
6-2. Cabinet (Lower) Section ................................................... 30
6-3. CD Mechanism Deck Section (CDM-3123EBA) ............. 31
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
damaged by heat.
7. ELECTRICAL PARTS LIST......................................... 32
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
P ART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
– 2 –
SECTION 1
SERVICE NOTE
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.
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.
Before Replacing the Optical Pick-Up Block
Please be sure to check throughly 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.
S801
detection lever
detection lever
main board
• FOK output : IC601 eg pin
When checking FOK, remove the lead wire to disc motor.
• RF signal P-to-P value : 0.45 ± 0.1 Vp-p
• The repairing grating holder is impossible.
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 screwdriver having a
thin tip as shown in Fig.1.
or TAP802 is shorted as shown in Fig.2.
Note: Do not push the detection lever strongly, or it may be bent
or damaged.
3. Press the > N button.
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 5
times along with inward motion for the focus search.
Fig. 1
– MAIN BOARD – (SIDE A)
S803
HOLD
OFF ON
TAP802
– MAIN BOARD – (SIDE B)
– 3 –
OPEN
S801
Fig. 2
SECTION 2
GENERAL
This section is extracted
from instruction manual.
– 4 –
– 5 –
– 6 –
– 7 –
SECTION 3
y
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. “LID, BATTERY CASE”, CABINET (FRONT) ASSY
1 B 2x10
8
0 cabinet (front) assy
3-2. LID ASSY, UPPER
6 claws
7 claws
9
3 B 2x10
2 lid, battery case
2 lid assy, upper
4 claws
boss
5 claws
– 8 –
1 claws
cabinet (front) ass
3-3. MAIN BOARD, MD ASSY
)
5 MAIN board
S803
cabinet (lower) assy
4 MD assy
1 CN501
2 CN502
3 CN503
terminal (link), battery (BT401
terminal (+,–), battery (BT400, 402)
– 9 –
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