Unisound UPA-550FM Operating instructions
- Category
- Cassette players
- Type
- Operating instructions
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.
19
20 21 22 23 24 25 26 27
FUSE
• Front & Rear Panel Controls & Features
• Speaker Connections
1. Jacks MIC-1 to MIC-3 15.POWER LED
For connecting low impedance microphones. This LED glows to indicate that the set is ON.
2. CASSETTE COMPARTMENT. 16.MONITOR LED
Door of this compartment can be opened for loading or
17.TREBLE Control
unloading of cassette tape by pressing STOP / EJECT
For controlling the high frequency signals.
key.
18.BASS Control
3. REWIND key
For controlling the low frequency signals.
Press for fast rewinding of the tape.
19.AC Mains Fuse (Rating 1Amp 250V)
4. FAST FORWARD key
20.AC Mains Cable with plug
Press for fast winding of the tape.
21.BATTERY Terminal Strip
5. PLAY key
For connecting a 12V car battery.
Press for tape playback
22.EARTH Terminal
6. STOP / EJECT key
23.100 VOLT LINE Terminal Strip
For stopping the tape when it is running in any mode.
The same key pressed again ejects the cassette.
24.SPEAKER Terminal Strip
For connecting speakers or driver units.
7. PAUSE key
Press to temporarily stop the tape in PLAY mode.
25.LINE / BOOSTER Output Jack Socket
For connecting additional higher wattage amplifier for
8. MIC-3 / TAPE Selector Switch
obtaining more power output.
9. MIC-3 / TAPE Volume Control
26.AUX Input Jack Socket
10.MIC-2 / FM Selector Switch
For connecting an auxiliary source like a CD player,
11. MIC-2 / FM Volume Control
Tuner, Echo or Audio Mixer etc.
12.FM Tuning Control
27.FM ANTENNA Screw Strip
13.MIC-1 / AUX Volume Control For connecting diapole antenna for clear reception.
14.POWER switch
Low Impedance
Speaker impedance taps of 4, 8 and 16 have been provided for direct connection of speakers to the amplifier when the distance
between the amplifier and speakers is less than 50 meters. Use 23/36 or thicker cable for connections. Be sure that total
impedance of speakers is equal to or above the impedance specified on the terminal strip.
32 × 32
32 + 32
Total Impedance:
= 16
Total Impedance:
16 × 16
16 + 16
= 8
4
8 16
COM
16
L1
L2
16
L1
L2
16
L1
L2
16
L1
L2
4
8 16
COM
16
L1
L2
16
L1
L2
0
2
4 6
10
8
0
2
4 6
10
8
43
2
1
9
10
8
13
14
-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
5
6
7
11 12
16
17
18
15
• Operating Procedure
CASSETTE INSERTION
AC MAINS OPERATION
Set all volume controls to '0' position and keep the power
switch at OFF position. Connect the speakers and required
inputs.
Plug in the AC power supply cord to the nearest AC mains
socket and put the power switch to POWER position. The pilot
LED should glow.
Adjust the volume and tone controls to the desired level in the
following manner:
1. The BASS and TREBLE controls should be set at ‘0’ (Flat)
position.
2. Move the volume control of MIC-1 channel slowly to the
desired sound level but not up to the point where howling
and feedback starts.
3. Now repeat the same for MIC-2, MIC-3 and so on.
4. When playing a tape, keep the MIC-3 / TAPE switch at
TAPE position.
5. The tape can be advanced rapidly by pressing the FF key.
6. The tape can be rewound rapidly by pressing the REW
key.
7. To stop the tape, press the STOP / EJECT key. To eject the
tape, press this key a second time.
8. Due to the Auto Stop system, the cassette stops
automatically when the tape comes to an end in play
mode.
100V Line
When it is desired to connect speakers or driver units at a
distance over 50 meters, it is recommended that the 100V line
output be used together with line matching transformer for
each speaker. This prevents excessive power loss in the
speaker cables.
100V Line output is provided on a separate terminal strip with
its COM separate from low impedance speaker connections.
This provides facility for floating or grounding of long line
installations. For floating, disconnect the shorting link
between earth terminal and COM of 100V Line output strip.
Since this is a front loading cassette player, the cassette is to
be loaded with the exposed tape portion facing down and the
full reel of tape towards the left.
100V
COM
30W
20W
10W
5W
40W
COM
1
L1
L2
30W
20W
10W
5W
40W
COM
2
L1
L2
30W
20W
10W
5W
40W
COM
9
L1
L2
USING THE TONE CONTROLS
The Bass and Treble controls should be individually set to the
desired level as explained below.
BASS: This controls the tonal quality of low frequencies
produced by musical instruments like Tabla / Drum etc., and to
some extent male human voice. When this control is
advanced towards BOOST position, it will boost i.e. increase
the intensity of the low frequencies. Similarly, when it is
lowered towards CUT position, it will cut i.e. reduce the
intensity of low frequencies.
TREBLE: This controls the tonal quality of high frequencies
produced by musical instruments like Violin, Sarangi and
Sitar etc. and to some extent female human voice. When the
control is advanced towards BOOST position, it will boost i.e.
increase the intensity of high frequencies. Similarly, when
lowered, towards CUT position, it will cut i.e. reduce the
intensity of high frequencies.
FM RADIO OPERATION
Put the FM / MIC-2 Switch in FM position.
Tune to the desired FM station by rotating the Tuning Knob.
FM Antenna Screw Strip has been provided for optimizing the
reception of the tuner by connecting an external antenna.
In case of strong local stations, or when the equipment is situated
near a transmitting station, the external antenna may not be
required. In case of fringe areas where the signal is very weak, a
diapole antenna may be connected to the antenna terminals with
the help of 2-way ribbon wire.
PRECAUTION
1. Do not use this unit in high ambient temperature.
2. Before the cassette tape is inserted into the cassette slot,
loose tape must be tightened up to avoid its entangling with
the pinch roller.
3. Speaker impedance mismatch may cause insufficient output
or overheating of the components, which may lead to failure of
the components. Check and make sure that the impedance of
the speakers is equal to or greater than the selected
impedance on the output terminal strip.
4. Use of C-120 cassette is not recommended as it is extremely
thin and may cause problems.
TROUBLE CHECKS
The following trouble checks will help to correct the most
common problems encountered with a cassette player.
The auto stop mechanism activates and the tape stops
just after it is inserted.
+ The tape is completely wound on the right reel.
+ Cassette spools jammed due to deformed cassette shell.
Tape moving but no output
+ The tape volume control is at minimum.
+ Speakers are not connected.
+ The MIC-3 / TAPE selector switch is at MIC-3 position.
Hum in Mic and Aux. inputs
+ Shielding of the pickup wire not proper. Use good quality
shielded cable for input connections.
Set gets very hot during operation
+ Proper ventilation not provided. Keep the set away from
walls in a well ventilated area.
+ Speaker mismatch causing overloading. Check the total
speaker impedance and connect it to the proper tap on the
output terminal strip.
Loss of power at the speakers
+ Speaker cables very long. Under such conditions, make
use of the 100V line output connection.
+ Speaker cables thin. Use thicker type 23/36 cables.
+ Speaker may be defective.
MAINTENANCE
To get long trouble free service, maintenance is essential.
After some use the Head, Capstan, Pinch Roller etc. that
come in contact with the tape, become dirty due to dust or
magnetic material on the tape. Dirty heads cause loss of high
frequencies and the output falls. Dirty capstan and pinch roller
will cause unstable tape speed, leading to increased Wow
and Flutter.
• Maintenance & Trouble Checks
To clean these, follow the under-mentioned procedure:
+ Open the cassette door by pressing the STOP / EJECT
key.
+ Press the PLAY key. The head becomes visible inside the
cassette compartment.
+ Clean the head and pinch roller with a cotton bud dipped in
methylated spirit / alcohol.
+ Keep magnets and metallic objects away from the head. If
the head gets magnetized, it will lead to more noise and
loss of high frequencies. The head and all metallic parts
should be got demagnetized after about 50 hours of use.
+ Consult your dealer about demagnetizing the head.
TRUSOUND PVT. LTD. C-89, Sector IV, Noida, Gautam Budh Nagar-201 301 (UP)
Regd. Office : 125E, Okhla Industrial Estate, New Delhi-110 020
Tel.: +91-120-2551452/53 Fax : +91-120-2553677
E-mail: [email protected], [email protected] Website: www.ahujaradios.com
1K/07/07/R0
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Unisound UPA-550FM Operating instructions
- Category
- Cassette players
- Type
- Operating instructions
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