Sony d 837 k service manual

Page 1

D-835K/837K/838K

SERVICE MANUAL

Photo: 0-838K

US Model
Canadian Model

D-835K/837K/838K

AEP Model

D-835K/838K

UK Model

D-835K

E Model

0-837K/838K

Australian Model
D-838K

System
Compact disc digital audio system
Laser diode properties
Material: GaAIAs
Wavelength: 1:780 nm
Emission duration: Continuous
Laser output power: Less than
44,6 uW
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 3 dB (measured by EIA)
CP-307)
Output (at 4.5 V input level)
Headphones (stereo miniiack)
20 mW + 20 mW at 16 0th
Line output (stereo minijack)
Output level 0.75 V rms at <17 kilnhrns
Recommended load impedance over 10
kilohms

General
Power requirements
0 Sony BP-DM10 rechargeable battery:
2.4 V DC, Ni-Cd, 650 mAh

Model Name Using Similar Mechanism

D-840K

CD Mechanism Type

KSM-3336AN

Optical Pick-Up Name

KSS-aC-ISC

SPECIFICATIONS

0 Two LRn (size AA) batteries: 3 V DC
° AC power adaptor (DC IN 5 V
jack)
220 - 230 v, 50 Hz (European model)
120 V, 60 H2 (USA, Canadian, Central
and South American model)
2-1U V, 50 HL (Australian model)
231) - 240 V, 50 Hz (U.K. model)
O Car battery (DC IN 4.5 V jack):
4.5 V DC
Dimensions (wlh/d) (incl. projecting
parts and controls)
Approx. 140 x 33.3 x 166.5 mm
(5%i1%i.x6%in.)
Mass (exclr rechargeable batteries)
Approx, 300 p, (101701.)
Operating temperature
5°C - 35°C (4 I°F - 95°F)

Supplied accessories
D-535K
AC power adaptor (1)
Connecting cord (Phono plug x 2 H
stereo miniplug) (1)
Stereo headphones (1)
Car connecting pack (1)
Car battery cord (1)
Spiral tube (1)
Velcro tapes (2)
Spare fuse (1)
'Not supplied with USA and UK
models

D-337K

AC power adaptor (1)

Connecting cord (Phono plug x 2 H
stereo miniplug) (1)

Card remote control (1)

Stereo headphones (1)

Car connecting pack (1)

Car battery cord (1)

Spiral tube (1)

Velcro tapes (2)

Spare fuse (1)

Velcro tapes for attaching card remote
control (1)

Supplied with Canadian model only

D-833K

AC power adaptor (1)

Connecting cord (Phono plug X 2 <->
stereo miniplug) (1)

Card remote control (1)

Stereo headphones (1)-

Car connecting pack (1)

Car battery cord (1)

Spiral tube (1)

Velcro tapes (2)

5pm fuse (1)

Velcro tapes tor attaching card remote
Control (1)

Supplied wtlh Canadian and
European models

Design and specifications are subiect to

change Without notice

COMPACT DISC COMPACT PLAYER
S ()NY®

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TABLE OF CONTENTS

GENERAL

Parts Identification ........................................................... 3
SERVICE NOTE . 4
DISASSEMBLY ........................................................... 6
SERVICE MODE ....................................................... 7
ELECTRICAL ADJUSTMENTS .......................... 8
DIAGRAMS

Printed Wiring Board . [3
Schematic Diagram 17
IC Pin Function Description . 25
EXPLODED VIEWS .................................................. 27
ELECTRICAL PARTS LIST .................................. 30

Flexible Circuit Board Repairing

0 Keep the temperature of the soldering iron around 270 'C during
repairing.

0 Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

0 Be careful not to apply force on the conductor when soldering or
unsoldering.

Notes on chip component replacement

0 Never reuse a disconnected chip component.

0 Notice that the minus side of a tantalum capacitor may be dam-
aged by heat

SAFETY-RELATED COMPONENT WARNINGII

COMPONENTS IDENTIFIED BY MARK A OR DOTI'ED
LINE WITH MARK A 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 PUB-
LISHED BY SONY.

ATTENTION Au couposmr AYANT RAPPORT
A LA sEcunITEi

LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A
SUR LES DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMEROS SONT DONNES DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

This Compact Disc player is classified as a CLASS 1
LASER product.
The CLASS 1 LASER PRODUCT label is located on
the rear exterior.

CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE

KLASS I LASEHAPPARKI

CAUTION

Use of controls or adjustments or performance of pro-
cedures other than those specified herein may result in
hazardous radiation exposure.