Unisound UPA-550FM User Manual

PA CASSETTE PLAYER + TUNER
OPERATION MANUAL
OPERATION MANUAL
Please read this manual thoroughly before making connections and turning on the power. Following the instructions in this
manual will enable you to obtain optimum performance from your new PA Cassette Player + Tuner.
Please retain this manual for future reference.
FEATURES
 Heavy duty, rugged front loading Tape Deck Mechanism with Auto-stop, Pause, FF and REW functions.
 AC mains and 12V DC car battery operation.
 Provision for automatic changeover from AC to Battery Operation ensuring continuity of program.
 100V line for long distance speaker connections .
 Separate active BASS and TREBLE controls for shaping tonal quality of music & speech as desired.
 Built-in FM Radio (Range 88MHz - 108MHz) with varactor tuning, high sensitivity and excellent thermal
stability.
 Three low impedance Microphone inputs and one Aux. Input. The Aux input is for connecting Mixer, CD Player, etc.
 LINE/BOOSTER OUT for connecting additional booster amplifier.
FM - RADIO TUNER
Tuner Freq. Range : 88MHz - 108MHz
GENERAL
Power Supply : AC - 220-240V 50/60 Hz*
: DC - 12-14 V Car Battery
Semiconductors : 18 Transistors
: 9 Diodes
: 2 Zener Diodes
: 2 LEDs
Dimensions : W340 × H145 × D270 mm
Weight : 7.3 kg approx.
PLAYER SECTION
Track System : 2 Track Monaural
Tape Speed : 4.75 cm / sec.
FF/REW Time : 100 sec. Approx. (C-60)
Wow & Flutter : 0.35% Nominal
Tape Speed Accuracy : Within +3% -2%
AMPLIFIER SECTION
Power Output : 75 Watts RMS (Max)
: 50 Watts RMS at 10% THD
: 45 Watts RMS at 5% THD (Rated)
Input Channels : 3 × Mic 0.6mV (Lo-Z) / 4.7k
: 1 × Aux 100mV / 470k
Frequency Response : 50Hz - 15,000Hz ±3dB
S/N Ratio : >55dB
Tone Control: : Bass: ±10dB at 100Hz
: Treble: ±10dB at 10kHz
Output Taps for speaker : 4, 8, 16 & 100V
matching
Line Output : 400mV / 2.7k
* This unit is connected to 240V tap when leaving the factory.
Owing to continuous product up gradation, design & specifications are
subject to change without notice.
Specifications claimed are subject to permissible production tolerances.
SPECIFICATIONS
UPA-550FM
0
2
4 6
10
8
0
2
4 6
10
8
-10
6
2 2
+10
6
8
4
0
4
8
-10
6
2 2
+10
6
8
4
0
4
8
BASS
TREBLE
POWER
MIC-3/TAPE
0
2
4 6
10
8
MIC-2/FM
88 MHz
108 MHz
TUNING
MIC-1/AUX
TAPE
MIC-3
FM
MON
ON
MIC-2
UPA-550FM
PA CASSETTE PLAYER + TUNER
REW FF PLAY STOP/EJECT
PAUSE
AC / 12V DC
MIC-1
MIC-2
MIC-3
45W RMS / 75W Max.

Unisound UPA-550FM Specifications

General

Brand	Unisound
Model	UPA-550FM
Category	Cassette Player
Language	English

Summary

Product Features

Front Loading Tape Deck

Features a heavy-duty tape deck with auto-stop, pause, fast forward, and rewind functions.

Dual Power Operation

Supports operation via AC mains or a 12V DC car battery with automatic changeover.

100V Line Output

Includes a 100V line output for connecting speakers over long distances.

Tone Controls

Offers separate active BASS and TREBLE controls for audio tonal adjustment.

Built-in FM Radio

Features an FM radio tuner with varactor tuning, high sensitivity, and thermal stability.

Input Options

Provides three low impedance microphone inputs and one auxiliary input.

Line/Booster Output

Offers a LINE/BOOSTER OUT for connecting an additional booster amplifier.

Technical Specifications

Player Section Specifications

Details specifications for the cassette player, including track system, tape speed, and wow/flutter.

Amplifier Section Specifications

Outlines specifications for the amplifier, such as power output and input channel details.

FM Radio Tuner Specifications

Lists the frequency range for the built-in FM radio tuner.

General Specifications

Covers general aspects including power supply, semiconductors, dimensions, and weight.

Front and Rear Panel Controls

Microphone and Tape Inputs

Details the MIC-1 to MIC-3 jacks and the MIC-3/TAPE selector switch and volume control.

Cassette Deck Controls

Explains the cassette compartment and controls like STOP/EJECT, PLAY, PAUSE, REWIND, and FAST FORWARD.

FM Tuner and Volume Controls

Describes the MIC-2/FM selector, MIC-2/FM volume, FM tuning control, and MIC-1/AUX volume.

Power and Indicator Controls

Details the POWER switch, POWER LED, and MONITOR LED indicators.

Tone and Signal Controls

Explains the TREBLE and BASS controls and the AC Mains Fuse.

Connectivity Terminals

Covers AC Mains Cable, BATTERY Terminal Strip, EARTH Terminal, 100 VOLT LINE Terminal Strip, and SPEAKER Terminal Strip.

External Connections

Details the LINE/BOOSTER Output Jack, AUX Input Jack, and FM ANTENNA Screw Strip.

Speaker Connections

Low Impedance Speaker Setup

Guides on connecting speakers with 4, 8, or 16 ohm impedance for distances under 50 meters.

Operating Procedures

100V Line Operation

Instructions for connecting speakers using the 100V line output with transformers for long distances.

Cassette Insertion

Provides guidance on correctly inserting a cassette tape into the player.

AC Mains Operation

Steps for operating the unit via AC mains power, including volume and tone adjustments.

Tone Control Usage

Explains how to use the BASS and TREBLE controls to adjust low and high frequencies.

FM Radio Operation

Instructions for tuning and operating the FM radio, including antenna connection.

Operational Precautions

Lists important precautions for operating the unit, including temperature and cassette type.

Maintenance and Troubleshooting

Routine Maintenance

Provides steps for cleaning the tape head, pinch roller, and capstan for optimal performance.

Cassette Player Troubleshooting

Addresses common issues like auto-stop activation and tape movement problems.

Audio Input Troubleshooting

Covers troubleshooting for hum in microphone and auxiliary inputs.

Operation and Output Issues

Addresses overheating, speaker mismatch, and loss of power at speakers.