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Pioneer SX-303 Service Manual

Pioneer SX-303
27 pages
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:-_
t
I
I
(D
rrloNEEFl'
ORDER
NO.
ARP-
232-0
AM/FM
STEREO
RECETVER
sixr3Gl3
o
This
service manual
is
applicable
to the
KU types.
For
servicing
of the
other types,
please
refer
to the
additional
service
manual.
o
Ge
manuel
d'instruction
se refdre
au mode
de r6glage,
en frangais.
o
Este
manual
de
servicio
trata del m6todo
de
ajuste
escrito
en espafiol.
CONTENTS
1.
2.
3.
4.
5,
6.
7.
SPECIFICATIONS
FRONT
PANEL
FACILITIES
PARTS
LOCATION
BLOCK
DIAGRAM
CIRCUIT
DESCRIPTIONS
.
PACKING
EXPLODED
VIEW
AND PARTS
LIST
2
3
4
5
6
8
9
8. P.C.
BOARDS
CONNECTION
DIAGRAM
12
9.
SCHEMATIC DIAGRAM
15
10.
ELECTRICAL
PARTS
LIST
. .
17
11. DIALCORDSTRINGING
......
19
12.
ADJUSTMENTS...
20
nEcucr
22
AJUSTE
... 24
PICINEEFI
ELECTFICINIC
CclFlPClFIATIClN
4-1,
Meguno
1-chome,
Mesuno-ku,
Tokyo
1F3,
Japan
FIC|NEEFI
ELECTFICINI€9
IUAAI
lNC. 1925
E.
Dorninguez
St., Long
Beech,
Catifonnia
gOB1O
U.S.A.
FfoNEEFI
ELEcrFloNlc
[EuFtoPEI
N.v.
Keerbengtean
1,e74o
Bevenen,
Betgium
PI('NEEFf
ELECTFICINIGB
AUaTFIALIA
FTY.
t-lO.
lzA-le4
Boundany Ftoad,
Bnaeside,
Victonier
819F,
.Ausrnatia
MODEL
SX-303
(SX-303L)
COMES
IN FIVE
VERSIONS
DISTINGUISHED
AS FOLLOWS:
Model
Voltage
Remarks
sx-303/KU
AC120V only
U.S.A. model
sx-303/Kc
AC120V only
Canada model
sx-303/s
AC1 1 0V,
'l2OV
,22OV
and
24OV
(switchabte)
General export
model
SX-303L/HE
AC220V
only
European
continent
model
with AM-LW
band tuner
sx-303L/HEZ
AC220V
only
West
germany
model
with AM-LW
band tuner
YX
O
DEC.
1982
Printed
in
lapan
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
Question and Answer IconNeed help?

Do you have a question about the Pioneer SX-303 and is the answer not in the manual?

Pioneer SX-303 Specifications

General IconGeneral
BrandPioneer
ModelSX-303
CategoryStereo Receiver
LanguageEnglish

Summary

Specifications Overview

Amplifier Section Specifications

Details amplifier output power, distortion, sensitivity, and frequency response.

AM Tuner Section Specifications

Lists sensitivity, selectivity, and response for AM tuning.

FM Tuner Section Specifications

Details sensitivity, selectivity, and response for FM tuning.

Miscellaneous and Furnished Parts

Covers power, dimensions, weight, and included accessories.

Front Panel Facilities

Front Panel Controls and Indicators

Describes all buttons, knobs, switches, and indicators on the front panel.

Parts Location Guide

Component Identification Views

Visual guides showing part locations on front, rear, and top views.

System Block Diagram

Signal Flow Overview

High-level overview of internal signal flow and major functional blocks.

Circuit Descriptions

FM Front End and IF Circuitry

Explains FM reception stages, including IF amplification, detection, and MPX.

FM Muting and LED Driver Circuitry

Details the circuit for muting weak FM signals and driving tuning indicators.

AM Tuner and AF Section Circuits

Covers AM tuning circuitry, equalizer, and audio amplifier sections.

Protective Circuits Operation

Describes DC voltage protection and power on/off muting circuits.

Packing Information

Packing Diagram and Parts

Illustrates how the unit is packed and lists associated parts.

Exploded View and Parts List

Exploded View and Component Parts

Detailed breakdown of the unit with a comprehensive list of all parts.

P.C. Boards Connection Diagram

Transistor and IC Pinout Diagrams

Shows external appearances and pinouts for semiconductors used in the unit.

Printed Circuit Board Layout

Illustrates the physical layout and connections on the main circuit boards.

Schematic Diagram

Full Circuit Schematic

Comprehensive electrical schematic detailing all components and their interconnections.

Electrical Parts List

Resistors and Capacitors List

Lists resistor values and capacitor types/values with their circuit symbols.

Semiconductor and Other Parts

Lists transistors, ICs, transformers, switches, and other components.

Assembly Specific Parts

Lists parts for headphone jack, LED, pointer, and switch assemblies.

Dial Cord Stringing Procedure

Tuning Cord Installation Guide

Step-by-step instructions and diagrams for correctly stringing the tuning dial cord.

Adjustments

FM Tuner Section Adjustments

Procedures and points for adjusting the FM tuner section for optimal performance.

FM Tracking and AM Tuner Adjustments

Steps for aligning FM tracking and AM tuner sensitivity.

Long Wave Section Adjustments

Adjustment steps for the Long Wave band, specific to certain models.

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