Sony d ej 835 service manual

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D-EJ835

SERVICE MANUAL UKModel

Ver 1.0 2001.12

Model Name Using Similar Mechanism D-EJ725

CD Mechanism Type CDM-3123EBA
Optical Pick-up Name BAX-23E
SPECIFICATIONS
System - 'I\yo LR6 (size AA) batteries: 3 V DC Operating temperature
Compact disc digital audio system - AC power adaptor (DC IN 4-5 V jack): 5°C , 35°C (am: A 95°F)
_ _ 230 A 240 V 50 Hz . . .
Laser diode properties Dimenstons (w/h/d) (excluding
Material: GaAlAs Battery life (approx. hours) projecting parts and controls)
Wavelength: = 780 nm (When you use the CD player on a flat and stable Approx. 131_(, X 255 X 1409 mm
Emission duration: Continuous Surface-) (5 V4 X 1 1/lo X 5 5/x in.)
Laser oulpul: Less than 445 aw Playing time varies depending on how the CD _ '
(This outpttt is the value measured at a distance player is used- 9:355 (9:92??? afcessorles)
) .\ . ) \ - _ rox. . oz.
of 200 mm from the objective lens surface on When ustnq G-PROTECTION ammo" pp g
the optical pickeilp block With 7 mm aperture.) nn nII _ '
. Supplied accessories
D'A °°nYeF5'°"_ No NC»WMAA 3 10 For the area code or the location in which yott
14 qua meaxs 01 (charged {or purchased the CD player, check the upper left side
Frequency response about 3 hours* of the bar code on the package.
+| -

20 . 20 000 Hz ,2 dB (measured by JEITA CP» NHAWM2AA 20 22 AC power adaptor (1)
307) (charged for Headphones/earphones with remote control ( 1)
Output (at 4.5 V input level) about 5 hours) Rechargeable batteries (2)
Line output (stereo minijack) Two Sony alkaline 34 38 Battery carrying case (1)

Output level 0.7 V rms at 47 kn batteries LR6

Recommended load impedance over 10 k9 Four Sony alkaling 75 86 V _ \ _ _
Headphones (stereo minijack) batteries LR6(SG) Dizgnlantispeclficattons are subject to change

- WI no no ice.

Approx. 5 mW + Approx. 5 mW at 16!) Two rechargeable 44 50

(Approx. 1 mW +Approx. 1 mW at 16(2)* batteries NCAWMAA and

*For the customers in France

two Sony alkaline

Optical digital output (optical output connector) battcri LR6(SG)

alattizzzigeassst a a
r ' 1 NHeWMzAA and

Power requirements two Sony alkaline

For the area code of the model you halt ' LR6(SG)

purchased, check the upper left side of the

bar code on the package. * Measured value by the standard ot'JEITA (Japan

. Two Sony NOWMAA rechargeable Electronics and Information Technology
galleries; 2.4 V DC Industries Association).

. Sony Nl-LWMzAA rechargeable battering: ** Charging time varies depending on how the
2 4 V DC rechargeable battery is used.

9-873-448-01 Sony Corporation
2001L0500-1 Personal Audio Company
© 2001.12 Published by Sony Engineering Corporation ®

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D-EJ835

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TABLE OF CONTENTS

SERVICING NOTES .. 3
GENERAL .. 4
DISASSEMBLY

Di. ssembly Flow ........................ 5
Cabinet (Front) Assy, Cabinet (Re ') As 5
Cabinet (Upper), Switch Unit, Upper Lid 6
MD Assy (CDM-3123EBA), MAIN Board . .. 6
Turn Table Motor Assy (M901) ...................................... 7
Sled Motor Assy (M902),

Optical Pick-up (DAX-ZSE) ........................................... 7

ELECTRICAL CHECK

DIAGRAMS

Block Diagram 7 MAIN Section (1/2)
Block Diagram 7 MAIN Section (2/2) .
Block Diagram 7 POWER SUPPLY Section
Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 12
Printed Wiring Board
7 MAIN Board (Component Side) 7 .............................. 14

Printed Wiring Board

7 MAIN Board (Conductor Side) 7
Schematic Diagram 7 MAIN Board (1/2) 7
Schematic Diagram 7 MAIN Board (2/2) 7
IC Pin Function Description ........................................... 18

EXPLODED VIEWS
Cabinet (Upper) Section ................................................. 19
Cabinet (Lower) Section ...........................
Optical Pick7up Section (CDM73123EBA

ELECTRICAL PARTS LIST ............................... 22

On AC poweradaptor

- Use only the AC power adaptor supplied or
recommended in "Accessories (siipplied/
optional) Do not use any other AC power
adaptor. It may cause a malfunction.

Pularity at the plug
._e
M

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 ra-
diation exposure.

This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.

CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE

KLASS 1 LASERAPPARAT

SAFETY-RELATED COMPONENT WARNING I!

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL T0 SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.