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Ver 1.0 1999.06
MICROFILM
D-E451/E455/E456CK/E459CK
SERVICE MANUAL
COMPACT DISC COMPACT PLAYER
SPECIFICATIONS
US Model
Model Name Using Similar Mechanism
D-E441
CD Mechanism Type
CDM-2811EAA
Optical Pick-up Type
DAX-11E
CD player
System
Compact disc digital audio system
Laser diode properties
Material: GaAIAs
Wavelength :
= 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 dB (measured by EIAJ CP-
307)
-2
Output (at 4.5 V input level)
Headphones (stereo minijack)
15 mW + 15 mW at 16 ohms
Line output (stereo minijack)
Output level 0.7 V rms at 47 kilohms
Recommended load impedance over 10
kilohms
General
Power requirements
For the area code of the model you purchased,
check the upper left side of the bar code on the
package.
· Sony BP-DM10 Rechargeable battery:
2.4 V DC, Ni-Cd, 650 mAh
Sony BP-DM20 Rechargeable battery:
2.4 V DC, Ni-MH, 1,200 mAh
· Two LR6 (size AA) batteries: 3 V DC
· AC power adaptor (DC IN 4.5 V jack):
US model: 120 V, 60 Hz
· Sony DCC-E245 car battery cord for use on
car battery : 4.5V DC
Dimensions (w/h/d) (without projecting parts and
controls)
Approx. 129 x 28 x 146 mm
( 51/8 x 11/8 x 53/4 in.)
Mass (without rechargeable battery)
Approx. 220 g (7.8 oz)
Operating temperature
5
°C - 35°C (41°F - 95°F)
Photo : D-E451
Supplied accessories
For the area code of the model you purchased,
check the upper left side of the bar code on the
package.
D-E451
AC power adaptor (1)
Headphones (1)
D-E455
AC power adaptor (1)
Headphones with remote control (1)
Rechargeable battery (1)
D-E456CK
AC power adaptor (1)
Headphones (1)
Car battery cord (1)
Car connecting pack (1)
Velcro tape (2)
Spare fuse (1)
Spiral tube (1)
D-E459CK
AC power adaptor (1)
Rechargeable battery (1)
Headphones with remote control (1)
Car battery cord (1)
Car connecting pack (1)
Velcro tape (2)
Spare fuse (1)
Spiral tube (1)
Design and specifications are subject to
change without notice.


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Specifications ............................................................................ 1
1. SERVICING NOTES ................................................... 3
2. GENERAL ...................................................................... 4
3. DISASSEMBLY
3-1. Lid ASSY, Upper ........................................................ 5
3-2. Cabinet (Upper) ASSY, Cabinet (Lower) Sub ASSY,
MD Assy ..................................................................... 5
3-3. Main Board, LED Sub Board (E456CK, E459CK) ... 6
3-4. Turn table motor ASSY (Spindle) (M902),
Optical pick-up (DAX-11E),
Sled motor ASSY (M901) ........................................... 6
4. SERVICE MODE .................................................... 7
5. ADJUSTMENTS .......................................................... 8
6. DIAGRAMS
6-1. Explanation of IC Terminals ...................................... 11
6-2. Block Diagram .......................................................... 13
6-3. Printed Wiring Boards .............................................. 16
6-4. Schematic Diagram ................................................... 19
7. EXPLODED VIEWS
7-1. Cabinet Section ......................................................... 29
7-2. Optical Pick-up Section ............................................ 30
8. ELECTRICAL PARTS LIST ................................... 31
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
! OR DOTTED LINE WITH
MARK
! 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 MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
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.
TABLE OF CONTENTS
CAUTION
Use of controls or adjustments or performance of procedures other than
those specified herein may result in hazardous radiation exposure.
DANGER
Invisible laser radiation when open and interlock failed or defeated.
Avoid direct exposure to beam.


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­ 3 ­
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 30cm away from the objective lens.
Before Replacing the Optical pick-up Block
Please be sure to check thoroughly the parameters as per the "Optical
pick-up Block Checking Procedure" (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 : IC501 !TM pin
When checking FOK, remove the lead wire to disc motor.
· S curve P-to-P value : 0.9 ­ 1.5Vp-p IC501 #¡ pin. (Connect pin !TM
of IC501 (TP880) and 3 of IC501 (GND) with a jumper wire).
When checking S curve P-to-P value, remove the lead wire to disc
motor.
· Adjusted part for focus gain adjustment : RV503
· RF signal P-to-P value : 0.8 ­ 1.2Vp-p
· Traverse signal P-to-P value : 1.0 ­ 2.4Vp-p
· The repairing grating holder is impossible.
· Adjusted part for tracking gain adjustment : RV502
SECTION 1
SERVICING NOTES
Fig. 1-2 Digital Voltmeter Connecting Location
NOTES ON HANDLINGTHE OPTICAL PICK-UP BLOCK OR
BASE UNIT
Method-2 (In the service mode or normal operation) :
Check the value of current flowing in the laser diode.
1. Remove the upper panel.
2. Read the current printed on the rear side of the optical pick-up.
(Print on the rear side of the optical pick-up)
3. Connect a level meter as shown in Fig. 1-2
4. Press the
^ key.
Fig.1-1 Method to push S801
AC2211397
year
version
month
A : less than 48 mA
current value
date
line No.
shift No.
5. Calculate the current value by the reading of the digital voltmeter.
Reading of the tester (V) ÷ 4.7 (
) = current value (A)
(Example) Reading of the digital voltmeter of 0.2256 V :
0.2256 V ÷ 4.7
= 0.048 (A) = 48 mA
6. Check that the current value is within the following range.
+5
· Current value of the label -11 mA(25
°C)
Variation by temperature : 0.4mA /
°C
Current increases with temperature increased.
Current decreases with temperature decreased.
If the current is more than the range above, there is a trouble in the
automatic power control circuit or the laser diode is in deterioration.
If less than the range, a trouble exists in the automatic power control
circuit or the optical pick-up.
[MAIN BOARD] (Side B)
S801
Laser Diode Checking Methods
During normal operation of the equipment, emission of the laser diode
is prohibited unless the upper panel is closed while turning ON the S801
(push switch type).
The following two checking methods for the laser diode are operable.
Method-1 (In the service mode or normal operation) :
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S801 as shown in Fig. 1-1 .
3. Check the object lens for confirming normal emission of the laser
diode. If not emitting, there is a trouble in the automatic power
control circuit or the optical pick-up. During normal operation, the
laser diode is turned ON about 2.5 seconds for focus searching.
1
5
8
17
20
24
25
32 30
TP102
TP202
TP302
TP306
TP540
TP508
IC501
TP503
TP533
(VC)
TP523
TP547
TP513
(RFO)
TP502
TP504
TP506
TP507
TP534
TP511
TP512
TP509
TP514
(TEO)
TP515
TP521
TP522
C105
C108
C205
C208
C501
Q201
Q101
D105
D804
D205
FB201
FB101
FB302
R521
R512
R519
R501
R807
R510
4
8
R549
R517
R504
R503
R502
C514
C599
C598
C503
C505
C510
C513
C504
C512
C511
C516
C520
L502
Q501 C525
C517
R505
C506
L508
C571
TP506
digital voltmeter
TP547


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SECTION 2
GENERAL
LOCATION AND FUNCTION OF CONTROLS
Remote control : (D-E455/E459CK)
1
ESP (Electronic Shock Protection) button
2
OPEN button
3
DC IN 4.5V jack
4
PLAY MODE button
5
+ FF button
6
LINE OUT jack
7
p STOP button
8
^ Play/pause button
9
OFF-RESUME-ON switch
0
2 /REMOTE jack
AVLS switch
!TM
VOLUME control
SOUND button
= FR button
!
Information display panel
REPEAT/ENTER button
HOLD switch
1234
5
7
8
9
0
!TM
!
6
p
^
HOLD**
VOL (volume)
Remote control
Earphones
+ = (AMS*/search)
+ ( (play)
+ + (AMS*/search)
+ p (stop)
*
Automatic Music Sensor
** When you are not using the remote
control, slide HOLD in the direction of the
arrow to prevent any accidental operation.
To unlock, slide HOLD back.
Note
·Useonl ythesuppliedremotecontr
ol.You
cannotoperatethisplayerwiththeremote
controlsuppliedwithothermodels.


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­ 5 ­
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. LID ASSY, UPPER
3-2. CABINET (UPPER) ASSY, CABINET (LOWER) SUB ASSY, MD ASSY
Lid ASSY, Upper
Cabinet (Upper) ASSY, Cabinet (Lower) sub ASSY, MD ASSY
Set
Main board, LED sub board (E456CK, E459CK)
Turn table motor ASSY (Spindle) (M902),
Optical pick-up (DAX-11E),
Sled motor ASSY (M901)
Lid ASSY, Upper
2
1 OPEN
1 Screws (1.4x2.5)
1 Screw
(1.4x2.5)
!º CN501
4 Claw
4 Claw
Claw
8 CN702
7 CN701
9 CN703
6
5
3
MD ASSY
Cabinet (Upper) ASSY
Cabinet (Lower) sub
ASSY
2 OPEN
r
The equipment can be removed using the following procedure.