Pioneer SX-251R User Manual

STEREO RECEIVER
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Thank you for buying this Pioneer product.
Please read through these operating instructions so you will
know how to operate your model properly. After you have fi-
nished reading the instructions, put them away in a safe place for
future reference.
In some countries or regions, the shape of the power plug and
power outlet may sometimes differ from that shown in the ex-
planatory drawings. However, the method of connecting and
Operating
Instructions
operating the unit is the same.
WARNING:.
TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EX-
POSE THIS APPLIANCE TO RAIN OR MOISTURE.
IMPORTANT NOTICE
[For U.S. and Canadian models]
. The serial number for this equipment is located on the rear panel.
Please write this serial number on your enclosed warranty card
and keep it in a secure area. This is for your security.
[For Canadian models]
CAUTION:
TO PREVENT ELECTRIC SHOCK DO NOT USE THIS
{POLARIZED)PLUG WITH AN EXTENSION CORD, RECEP-
TACLE OR OTHER OUTLET UNLESS THE BLADES CAN
BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
ATTENTION:
POUR PREVENIR LES CHOCS ELECTRIQUES NE PAS
UTILISER CETTE FICHE POLARISEE AVEC UN PROLON-
GATEUR UNE PRISE DE COURANT OU UNE AUTRE SOR-
TIE DE COURANT, SAUF SI LES LAMES PEUVENT ETRE
INSEREES A FOND SANS EN LAISSER AUCUNE PARTIE
A DECOUVERT.
| CHECKING ACCESSORY ITEMS ---e----0:setseteeeseeeeneeee 3
CONNECTIONS
REAR PANEL FACILITIES
FRONT PANEL FACILITIES
REMOTE CONTROL UNIT FACILITIES
SETTING THE UNIT PRIOR TO OPERATION:
GRAPHIC EQUALIZER CONTROLS «+s -es-eeeeeeeceeeersicrees 9
oaoarana
TWO VOLTAGE SELECTOR SWITCHES
Only multi-voltage models are provided with these switch-
es. U.S. Canadian models are not provided with these
switches.
Main voltages in Saudi Arabia are 127 V and 220 V only. Never
use this mode! with 110 V setting in Saudi Arabia.
The fine voltage selector switches are on the rear panel. Before
your model is shipped from the factory, these switches are set to
the power requirements of the destination. Check that they are
set properly before plugging the power cord into the AC outlet. If
the voltage is not properly set or if you move to an area where the
voltage requirements differ, adjust the selector switches as fol-
lows.
1. Disconnect the power cord.
2. Use a medium-size screwdriver.
3. Insert the screwdriver into the groove on the voltage selec-
tors and adjust so that the tip of the allow points to the vol-
tage value of your area.
220v 240)
IOV (200t27v
Set the voltage selector switch to the voltage in your area
{only SX-311R).
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CONTENTS =
LISTENING TO THE BROADCAST -rvvrvvrrrrrrrertrrttrteee 9
DIRECT ACCESS TUNING -
PRESET TUNING---
TO LISTEN TO OTHER MUSIC SOURCES
TAPE RECORDING:
TROUBLESHOOTING o
SPECIFICATIONS -+--02-----sesescssecasnsensaesaneeasecedeceneasecees
@) PIONEER’
The Art of Entertainment

Pioneer SX-251R Specifications

General

Tuning range	FM, MW
Frequency response	20Hz to 20kHz
Input sensitivity	150mV (line)
Signal to noise ratio	95dB (line)
Speaker load impedance	8 ohms
Dimensions	420 x 125 x 282mm
Signal-to-Noise Ratio	95dB (line)
Power output	30 watts per channel into 8Ω (stereo)
Total harmonic distortion	0.09% (20 Hz - 20 kHz, 50 W)

Summary

Two Voltage Selector Switches Operation

Adjusting Voltage Selector Switches

Instructions for adjusting voltage selector switches based on regional power requirements.

Safety Instructions

General Operating and Safety Precautions

Covers reading instructions, retaining them, heeding warnings, and general usage guidelines.

Appliance Placement and Environmental Safety

Guidelines on placement away from water, heat, and ensuring proper ventilation.

Electrical Safety and Power Cord Handling

Precautions for power sources, cord protection, polarized plugs, and cleaning.

Servicing and Damage Prevention

Instructions for handling damage, servicing by qualified personnel, and preventing object/liquid entry.

Outdoor Antenna Grounding and Installation

System Connections

FM Antenna Connections

Component Connections

Connecting Audio Input/Output Cords

Speaker Wiring Guidelines

Instructions for connecting speakers, including impedance and safety precautions.

Power Cord Connection (U.S./Canada)

Rear Panel Facilities Overview

Audio Input and Output Jacks

Details on various input jacks (Phono, CD, VCR/LD) and tape jacks.

Speaker and Control Connections

Power and Voltage Selector Settings

Explanation of voltage selectors, power cord connection, and the AC outlet.

Front Panel Controls and Operations

Power, Speaker, and Headphone Controls

Details on the power switch, headphone jack, and speaker selection buttons.

Tuning and Station Memory Management

Explanation of Station Call, Memory, Memory Scan, Band Selector, and Custom Memory buttons.

Source Selection and Monitoring

Tuning, Volume, and Balance Controls

Display Panel and Advanced Tuning Features

Explanation of the operation display panel and special buttons like RETURN, HITS, and tuning modes.

FM Reception Mode Selection

Remote Control Operation and Features

Remote Control Range and Battery Installation

Remote Control Buttons for Tuning and Memory

Listening to Broadcasts

Auto Tuning for FM Reception

Manual Tuning for FM/AM Reception

Direct Access Tuning

Inputting Station Frequencies Directly

How to input station frequencies using the STATION CALL buttons for direct tuning.

Tuning Process and Frequency Limits

Canceling Direct Access Input

Preset Tuning and Station Memory

Frequency Presetting Procedure

Steps for presetting up to three stations per STATION CALL button.

Listening to Preset Stations

Tape Recording and Copying

Recording Broadcasts and External Sources

Copying Tapes Between Decks

Troubleshooting Common Issues

Power and Sound Output Problems

Solutions for issues like no power, no sound, or sound from only one speaker.

Noise and Reception Issues

Troubleshooting high noise levels, AM noise, and poor FM/AM reception.

Remote Control and Auto Stop Issues