Sony Discman D-E440, D-E441, Discman D-E441SR, Discman D-E443, D-E445 Service Manual
...
Ver 1.0 1999.02
MICROFILM
D-E440/E441/E441SR/E443/E445/
E446CK/E449CK
SERVICE MANUAL
COMPACT DISC COMPACT PLAYER
SPECIFICATIONS
US Model
D-E441/E445/E446CK/E449CK
Canadian Model
D-E441/E445/E446CK
AEP Model
D-E440/E441/E441SR/E443/E445/E446CK
UK Model
D-E441/E441SR/E443/E445/E446CK
E Model
D-E441/E443/E445/E446CK
Australian Model
D-E441/E445/E446CK
Chinese Model
D-E441/E445
Model Name Using Similar Mechanism NEW
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 : 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 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, Canadian, Central and South America
model: 120 V, 60 Hz
AEP, German, French, EE, E13 model:
220 - 230 V, 50/60 Hz
UK model: 230 - 240 V, 50 Hz
EA model: 110 - 240 V, 50/60 Hz
AUS model: 240 V, 50 Hz
E33 model: 100 - 240 V, 50/60 Hz
Hong Kong model: 220 V, 50/60 Hz
Chinese, Argentine model: 220 V, 50 Hz
• Sony CPM-300P mount plate 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)
Supplied accessories
For the area code of the model you purchased,
check the upper left side of the bar code on the
package.
D-E440
Earphones (1)
D-E441
AC power adaptor (1)
Headphones (1)*
1
Earphones (1)*
2
AC plug adaptor (1)*
3
*1Supplied with US model
*2Not supplied with US model
*3Supplied with E33, E13 and EA models
Photo : D-E441
– Continued on page 2 –
– 2 –
Specifications ............................................................................ 1
1. SERVICING NOTES ................................................... 3
2. GENERAL ...................................................................... 4
3. DISASSEMBLY
3-1. Lid Assy , Upper .......................................................... 5
3-2. Cabinet (Front) Assy, Cabinet (Rear) Assy,
MD Assy..................................................................... 5
3-3. Main Board................................................................. 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......................................................... 28
7-2. Optical Pick-up Section ............................................ 30
8. ELECTRICAL PARTS LIST................................... 31
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE ! SUR LES
DIAGRAMMES SCHÉMATIQUES 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.
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
This Compact Disc player is
classified as a CLASS 1 LASER
product.
The CLASS 1 LASER
PRODUCT label is located on the
bottom exterior.
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.
D-E441SR
AC power adaptor (1)
Earphones (1)
Active speaker system (1)
D-E443
AC power adaptor (1)
Earphones (1)
Rechargeable battery (1)
AC plug adaptor (1)*
* Supplied with E33, E13 and EA models
D-E445
AC power adaptor (1)
Headphones with remote control (1) *
1
Earphones with remote control (1) *
2
Rechargeable battery (1)
AC plug adaptor (1)*
3
*1Supplied with US model
*2Not supplied with US model
*3Supplied with E13 model
D-E446CK
AC power adaptor (1)
Headphones (1) *
1
Earphones (1) *
2
Car battery cord (1)
Car connecting pack (1)
Velcro tape (2)
Spare fuse (1)
Spiral tube (1)
AC plug adaptor (1)*
3
*1Supplied with US model
*2Not supplied with US model
*3Supplied with E33, E13 and EA models
D-E449CK
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.
– 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 !™ pin
When checking FOK, remove the lead wire to disc motor.
• S curve P-to-P value : 1.2±0.3Vp-p IC501 #¡ pin. (Connect pin !™ 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
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 30cm 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 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 .
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.
Fig. 2 Digital Voltmeter Connecting Location
NOTES ON HANDLING THE 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. 2
4. Press the ^ key.
Fig.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 ( Ω ) = current value (A)
(Example) Reading of the digital voltmeter of 0.2256 V :
0.2256 V ÷ 4.7 Ω = 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] (Conductor side)
S801
TP506
digital voltmeter
TP547
– 4 –
SECTION 2
GENERAL
LOCATION AND FUNCTION OF CONTROLS
Volume control RM-DM29 : (D-E445/E449CK)
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
!™ VOLUME control
!£ Sound switch
!¢ = FR button
!∞ Information display panel
!§ REPEAT/ENTER button
!¶ HOLD switch
1234 5 7 8
90!¡!™!£!¢!∞!§!¶
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
• Use only the supplied remote control. You
cannot operate this player with the remote
control supplied with other models.
– 5 –
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. LID ASSY, UPPER
3-2. CABINET (FRONT) ASSY, CABINET (REAR) ASSY, MD ASSY
Lid ASSY, Upper
Cabinet (Front) ASSY
Cabinet (Rear) ASSY, MD ASSY
Set
Main board
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 (Front) ASSY
Cabinet (Rear)
ASSY
2
OPEN
r
The equipment can be removed using the following procedure.
– 6 –
3-3. MAIN BOARD
1
Main board
S804
S804
Knob (HOLD)
Knob (RESUME
)
Cabinet (Rear) ASSY
S803
S803
To install, position the knob
and the switch respectively.
Sometime the HOLD switch
(S804) and RESUME switch
(S803) will be broken.
– 7 –
SECTION 4
SERVICE MODE
• Step 3 (Resetting service mode )
1. Be sure to disconnect the external power supply and remove the
solder bridge at the TEST terminals connected in setting.
2. The set thus becomes available for normal operation.
– MAIN BOARD – (Side A)
Fig. 4 Location of test terminal
Service Mode (service program)
The equipment is provided with a service program built in the microcomputer, like conventional models.
Service program operation methods are described in the following.
Fig. 3 Layout of each key
• Step 1 (Service mode setting method)
1. Turn OFF the HOLD switch the external power supply disconnected (power is not applied to the set).
2. Solder across the T802 (TEST) terminals (pin %™, IC801 (TEST)
is grounded).
3. Connect an external power supply.
Thus, the set is switched to the service mode.
• Step 2 (Operation in the service mode )
1. Once the service mode is effected, the LCD displays 5 indications each of which is repeatedly displayed.
However, the following operations can be activated even if LCD
indication is effected.
2. By pressing the + or = key, the optical pick-up movable
inwardly or outwardly. However, if this is activated, tracking
servo and sled servo are turned OFF, so it can be turned ON by
pressing the PLAY MODE key, if required.
3. By pressing the REPEA T/ENTER key , the tracking gain-up mode
becomes active.
4. By pressing the ^ key, focus is turned ON from focus searching while entering CLV-S (pull-in mode).
Without disc, focus searching is repeated continuously.
5. By pressing the PLAY MODE key, tracking servo, sled servo
and CLV-A (servo in PLAY) are turned ON.
6. When 4. and 5. are performed, playing begins. No muting is ON
in the service mode.
7. By pressing the p key, all servos (focus tracking and sled) are
turned OFF. However, the disc motor revolves for a while by
inertia.
HOLD OFF n ON
Be sure to turn OFF the HOLD switch
(if ON, pressing each key is deactivated)
REPEAT/ENTER
Tracking gain-up mode while pressing
=
(FR)
The optical pick-up
is moved inwardly
+
(FF)
The optical pick-up
is moved outwardly
p
(STOP)
All servos are turned OFF
^
(PLAY/PAUSE)
FOCUS is turned ON
to effect pull in mode
PLAY MODE
Tracking servo and sled
servo are turned ON
p ^
T802 (TEST)
Normal mode : Open
Test mode : Short
– 8 –
Focus Bias Check
Condition :
• Hold the set in horizontal state.
Procedure :
[MAIN BOARD] (Side B)
1. Set the equipment to service mode stop state (See page 7).
2. Connect the oscilloscope between IC501 @£ pin (RF0) and #º
pin (VC) on the MAIN board.
3. Move the optical pick-up by Pressing the + and = keys.
4 Put the disc (YEDS-18).
5. Press the ^ key.
From focus searching, focus is turned ON while entering
CLV drawing-in mode. Tracking and sled are turned OFF.
6. Press the PLAY MODE key. (Both tracking and sled are turned
ON).
7. 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)
To watch the eye pattern, set the oscilloscope to AC range and
increase the vertical sensitivity of the oscilloscope for easy watching.
8. Stop removing of the motor by pressing the p key.
9. After the completion of adjustment, reset service mode.
(See page 7 )
SECTION 5
ADJUSTMENTS
( )
CD SECTION
Precautions for Adjustment
1. Before beginning adjustment, set the equipment to service mode.
After the completion of adjustment, be sure to reset the service
mode.
For more information, see “Service Mode (service program)”
on page 7.
2. Perform adjustments in the order given.
3. Use the disc (YEDS-18. Part No. 3-702-101-01) unless otherwise indicated.
4. Power supply voltage requirement : DC 4.5 V
HOLD switch : OFF
VOLUME : Minimum
SOUND switch : NORM
AVLS switch : OFF
Before Beginning Adjustment
Set the equipment to service mode (See page 7) and check the following.
If there in an error, repair the equipment.
• Checking of the sled motor
1. Open the upper panel.
2. Press the + and = keys and check that the optical pick-up
can move smoothly without sluggishness or abnormal noise in
innermost periphery n outermost periphery n innermost periphery.
+ : The optical pick-up moves outwardly
= : The optical pick-up moves inwardly
• Checking of focus searching
1. Open the upper panel.
2. Press the ^ key. (Focus searching operation is activated continuously).
3. Check the object lens of the optical pick-up for smooth up/down
motion without sluggishness or abnormal noise.
4. Press the p key.
Check that focus searching operation is deactivated. If not, again
press the p key slightly longer.
RF level
0.8 – 1.2 Vp-p
23
IC501 @£ pin
(RF0)
IC501 #º pin
(VC)
2 k
Ω
oscilloscope
(AC range)
– 9 –
1. Place the optical pick-up level, horizontally. (If the optical pickup is not level, the 2-axis device will be weighted and adjustment cannot be done.)
2. Connect the oscilloscope between IC501 0 pin (TEO) and #º
pin (VC) on the MAIN board.
3. Set the disc (YEDS-18) and Press the ^ (+) key.
4. Turn RV502 slightly clockwise (tracking gain drops) and obtain
a waveform with a fundamental wave (waveform has large
waves) as in Figure 1 .
5. Turn R V502 slowly counterclockwise (tracking gain rises) until
the fundamental wave disappears (no large waves) as in Figure
2.
6. Set R V502 to the position about 30 °counterclockwise from the
position obtained in step 5. If RV502 contact point is more than
90 ° counterclockwise from mechanical center, tracking gain is
too high. In this case, readjust from step 4.
7. Press ^ (+) or = keys and observe the 100 track jump
waveform. Check that no traverse waveform appears for both
^ (+) or = directions. (See Figures 3 and 4.) It is ac-
ceptable if the traverse waveform appears only now and then,
but if it appears constantly raise tracking gain slightly and check
step 7 again.
8. Check that there is no abnormal amount of operation noise (white
noise) from the 2-axis device. If there is, tracking gain is too
high, readjust starting with step 4.
The waveforms are those measured with the oscilloscope set as
shown below.
• VOLT/DIV : 50mV
• TIME/DIV : 5mS
• Waveform when tracking gain lowered.
Fundamental wave appears (large waves).
Fig. 1
• W aveform when fundamental wave disappears (no lar ge waves).
Fig. 2
• Waveform when no traverse waveform during 100 track jump.
(Brake application is smooth because of adjustment.)
Fig. 3
• Waveform when no traverse waveform during 100 track jump.
(Brake application is poor because of adjustment.)
Fig. 4
0
V
0
V
0
V
100 track jump waveform
0
V
100 track jump
waveform
traverse waveform
Focus/Tracking Gain Adjustment
A servo analyzer is necessary in order to perform this adjustment
exactly.
However, this gain has a margin, so even if it is slightly off, there
is no problem. Therefore, do not perform this adjustment.
Focus/tracking gain determines the pick-up follow-up relative to
mechanical noise and mechanical shock when the 2-axis device
operate. However, as these reciprocate, the adjustment is at the point
where both are satisfied.
• When gain is raised, the noise when 2-axis device operates increases.
• When gain is lowered, it is more susceptible to mechanical shock
and skipping occurs more easily.
This adjustment has to be performed upon replacing any of the following parts :
• Optical pick-up
• RV503 (Focus gain)
• RV502 (Tracking gain)
Normally, be sure not to move RV503 (focus gain) and RV502
(tracking gain).
– Focus Gain Adjustment –
Procedure :
This adjustment is not performed. If focus gain RV503 is turned,
set to mechanical center
– Tracking Gain Adjustment –
(perform at normal operation)
[MAIN BOARD] (Side B)
10
oscilloscop
e
(DC range)
IC501
0
pin
(TEO)
IC501
#º
pin
(VC)
Loading...