Sony cdx 81 service manual

Page 1

CDX-81

§ERVICE MANUAL USMode,

Canadian Model
AEP Model

UK Model

E Model

Model Name Using Similar Mechanism CDX-Ql
CD Drive Mechanism Type MG-110A-132
MG-1 1 03-1 32
Optical Pick-Up Name KSS-400A
SPECIFICATIONS
System Compact disc digital audio system Dimensions Approx 305 x 90 x 180 mm (w/h/d)
Frequency response 5 -~ 20,000 Hz not incl. projecting parts and controls
Wow and flutter Below measurable limit Mass Approx 22 kg
Signal-to-noise ratio 100 dB Power requirement 12 v DC car battery
Out-puts BUS control output (8 PIN) (nesafive ground)
Analog audio out-put (RCA PlN) Supplied accessories Disc magazine (1)
Current drain 800 mA (CD pIayback) Mounting hardware (1 sel)
800 mA (during loading or ejecting a BUS cable (1)
disc) . RCA pin cord (1)
Operating temperature
-10°C to 55°C Design and specifications subject to change without notice

COMPACT DISC CHANGER
S ONY®

Page 2

TABLE OF CONTENTS

1. GENERAL...W.H.UW

2. DISASSEMBLY ........................................................
3. MECHANICAL ADJUSTMENTS .......................
4. ELECTRICAL ADJUSTMENTSU...H.....i.m.m..i

5. DIAGRAMS

5-], IC Pin Function Description
5-2. Printed Wiring Boards ........
53.

6. EXPLODED VIEWS ...............................................

7. ELECTRICAL PARTS LIST .

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 solder-
ing 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
damaged by heat,

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
PUBLISHED BY SONV.

ATTENTION AU COMPOISANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS iDENTIFIES PAR UNE MAHOUE A
sun LES DIAGRAMMES SCHEMATIouEs ET LA LISTE
DES PIECES SONT camouEs POUR LA sEcunrrE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSAN'rs QUE PAR DEs PIECES soNv DONT LES
NUMEnos SONT DONNES DANS CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIEs PAR SONY.

Schematic Diagram ........................................................

5

9

10

17

29

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL
PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer elec-
trostatic breakdown because of the potential difference gen-
erated 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.

Laser Diode Properites

- Material; GaAIAs

- Wavelength: 780 nm

' Emission Duration: continuous

- Laser Output Power: less than 44.6 LiW*

* This output is the value measured at a distance of 200mm

from the objective lens surface on the Optical Pick»up
Block.

CAUTION

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

- Mechanism DeckType Discrimination
MG-1 1 0A-132

Lever (X) ass 'y

MG-1 103-1 32

Lever (X) ass'y