Ahuja CPA-360 Operating instructions

Brand: Ahuja

Model: CPA-360

Type: Operating instructions

CPA-360

PA CASSETTE PLAYER

OPERATION MANUAL

28W RMS / 35W Max.

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 AHUJA PA Cassette Player.

Please retain this manual for future reference.

SPECIFICATIONS

GENERAL

PLAYER SECTION

Power Supply : AC: 22 0 -240V 50 / 60Hz*

Track System : 2 Track Monaural

: DC: 1 2 -14 V Car Battery

Tape Speed : 4.75 cm / sec.

Power Consumption : AC: 48 VA at rated output

FF Time : 190 sec. approx. (C-60)

: DC: 2.7 A / 12V

Wow & Flutter : 0.35% Nominal

Semiconductors : 13 Transistors

Tape Speed Accuracy : Within +2% -1%

: 13 Diodes

: 2 Zener Diodes

AMPLIFIER SECTION

: 2 LEDs

Power Output : 35 Watts RMS (max.)

Dimensions : L280 × H100 × D295 mm

: 28 Watts RMS at 10% THD

Weight : 5.0kg approx.

Input Channels : 2 × Mic 0.5mV (Lo-Z) / 2.5k

: 1 × Aux 50mV / 250k

Frequency Response : 100Hz - 12,000Hz ±3dB

S / N Ratio : >55dB

Tone Control: : Bass: -6dB at 100Hz

: Treble: -10dB at 10kHz

* This unit is connected to 240V tap when leaving the factory.

Output Taps for speaker : 4, 8, 16 & 100V

Matching

Specifications claimed are subject to permissible production

Line Output : 250mV / 3.5 k

tolerances.

FEATURES

Imported Tape Deck Mechanism with Auto Stop used.

Provision for automatic changeover from AC to Battery Operation ensuring continuity of program.

100V line for long distance speaker connections.

Separate BASS and TREBLE controls for shaping tonal quality of music & speech as desired.

LINE OUT for connecting additional booster amplifier.

Two low impedance Microphone inputs and one Aux. Input. The Aux input is for connecting Mixer, CD Player,

etc.

MIC-1

MIC-2/AUX

PLAY

LOW IMPEDANCE MIC INPUTS

MON

POWER

PWR

EJECT

BASS

TREBLE

CPA-360

AC/12V DC

TAPE

AUTO STOP CASSETTE

15 16 17 18

COM

CPA-360

⇓ ⇓ ⇓ 100V LINE OUT AUX

LIVE

12V DC

240V~50Hz

• Front & Rear Panel Controls & Features

• Speaker Connections

1. MIC-1 Volume Control 11. TAPE-LO/TAPE-HI Selector Switch

2. MIC-2 / AUX Volume Control 12. MIC-2 Input Jack Socket

For Connecting a low impedance microphone.

3. TAPE Volume Control

13. MIC-1Input Jack Socket

4. BASS Control

For connecting a low impedance microphone.

For controlling the low frequency signals.

14. AC Mains Cable with plug

5. TREBLE Control

For controlling the high frequency signals. 15. BATTERY Terminal Strip

For connecting a 12V car battery.

6. MONITOR LED

This LED flickers to indicate the set is delivering 16. SPEAKER Terminal Strip

power to the load. For connecting speakers or driver units.

7. POWER LED 17. LINE Output Jack Socket

This LED glows to indicate that the set is ON. For connecting additional higher wattage amplifier for

obtaining more power output.

8. POWER switch

18. AUX Input

9. CASSETTE SLOT

For connecting an auxiliary source like a CD player,

The cassette is loaded into the set through this slot.

Tuner, Echo or Audio Mixer etc.

10. FF / EJECT Lever

For fast winding the tape, this lever is pushed in

partially. For ejecting the cassette, it is pushed in fully.

Total Impedance:

32 × 32

32 + 32

= 16

Total Impedance:

16 × 16

16 + 16

= 8

8 16 100V

COM

󼘬⇓

󼛦⇓

+ Low Impedance

Speaker impedance taps of 4, 8 and 16 ohms 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.

8 16 100V

COM

󼘤⇓

󼘙⇓

MIC-1

MIC-2/AUX

PLAY

LOW IMPEDANCE MIC INPUTS

MON

POWER

PWR

EJECT

BASS

TREBLE

CPA-360

AC/12V DC

TAPE

AUTO STOP CASSETTE

1 2 3 4 5 6 7 8

9101213 11

+ 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.

8 16 100V

COM

30W

20W

10W

40W

COM

30W

20W

10W

40W

COM

30W

20W

10W

40W

COM

• Operating Procedure

CASSETTE INSERTION

Hold the cassette tape in such a manner that the

exposed tape area is facing towards your right and the

full reel of tape is towards you.

Now insert the cassette into the cassette loading slot

firmly and push it in until it snaps into position.

To retrieve the cassette, push in the FF / EJECT lever

fully and the cassette will eject out.

CASSETTE OPERATION

Set all volume controls to '0' position and the TAPE-

LO/TAPE-HI selector switch to TAPE-LO position.

Connect the required number of speakers to the proper

impedance on the terminal strip.

Connect the AC cable to a suitable AC socket. For DC

operation, connect a 12V car battery to the battery

terminal strip.

Switch on the set with the POWER switch, so that the PWR

LED starts glowing.

Load the player with a recorded cassette and the tape

starts moving.

Adjust the tape volume and tone controls to the desired

level. As the output levels of pre-recorded tapes differ from

make to make, tapes which do not give enough output on

TAPE-LO position can be played with switch on TAPE-HI

position and vice versa.

The tape can be advanced rapidly by pushing in the FF /

EJECT lever partially.

To stop the tape, push in the FF / EJECT lever fully so that

the cassette is ejected out.

Due to the Auto Stop system, the cassette is automatically

stopped when the tape comes to an end.

USING THE TONE CONTROLS

A TREBLE control has been provided for controlling

the high frequency signals e.g. violin, sitar and to some

extent female voice. When this control is rotated from

maximum to minimum position, the high frequencies

are gradually cut down by about 10 dB.

A BASS control has been provided for controlling the

low frequency signals e.g. tabla, drums and to some

extent male voice. When this control is rotated from

maximum to minimum position, the low frequencies

are gradually cut down by about 6 dB.

PRECAUTIONS

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.

PWR

OWEP

C-1

2V DCA

LET

EJECT

LP AY

•

FULL REEL

EXPOSED TAPE

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 reel away from

you (refer instructions in “Cassette Insertion”).

Cassette spools jammed due to deformed cassette

shell.

Tape moving but no output

The tape volume control is at minimum.

Speakers are not connected.

Hum in Mic and Aux. inputs

Shielding of the pickup wire not proper. Use good

quality shielded cable for input connections.

Try reversing the AC mains plug of the set.

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 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.

MAINTENANCE

To get a 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.

To clean these, follow the under mentioned procedure:

Remove the plastic cover on the top by unscrewing

the screws provided. The head and pinch roller

become accessible through the cutout provided.

Clean the head and pinch roller with a cotton bud

dipped in methylated spirit.

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.

• Maintenance & Trouble Checks

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/02/06

Design and Specifications are subject to change without notice. • is a registered trademark of Ahuja Radios in India and other countries.

No part of the compilation may be reproduced in any manner or translated without written permission.

Ahuja CPA-360 Operating instructions

Ahuja CPA-360 Operating instructions

Ahuja CPA-360 Operating instructions

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