Ahuja CPA-760 Operating instructions

Ahuja
Brand
Ahuja
Model
CPA-760
Type
Operating instructions

Ahuja CPA-760

Below you will find brief product information for Ahuja CPA-760.

  • Versatile Audio System: The Ahuja CPA-760 is a versatile audio system designed for a wide range of applications, including conferences, seminars, presentations, and more.

  • Powerful Sound Output: With a power output of 70W RMS, the Ahuja CPA-760 can fill even large rooms with clear and powerful sound.

  • Multiple Input Options: The system features four low-impedance microphone inputs and one auxiliary input, allowing you to connect multiple microphones, instruments, or other audio sources.

Ahuja CPA-760

Below you will find brief product information for Ahuja CPA-760.

  • Versatile Audio System: The Ahuja CPA-760 is a versatile audio system designed for a wide range of applications, including conferences, seminars, presentations, and more.

  • Powerful Sound Output: With a power output of 70W RMS, the Ahuja CPA-760 can fill even large rooms with clear and powerful sound.

  • Multiple Input Options: The system features four low-impedance microphone inputs and one auxiliary input, allowing you to connect multiple microphones, instruments, or other audio sources.

-10
6
2 2
+10
6
8
4
0
4
8
LOW IMPEDANCE MIC INPUTS
-10
6
2 2
+10
6
8
4
0
4
8
TAPE
MIC-1
MIC-1
MIC-2
BASS
OUTPUT LEVEL
MASTER
ON -13 -8 -3 0 +3
TREBLE
MIC-2
MIC-3/AUX
MIC-3
MIC
MIC-4/TAPE
MIC-4
PLAY
FF
EJECT
CPA-760
AC/12VDC
AUTO STOP CASSETTE
POWER
6
10
8
0
2
4
6
10
8
0
2
4
6
10
8
0
2
4
6
10
8
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2
4
CPA-760
PA CASSETTE PLAYER
OPERATION MANUALOPERATION MANUAL
70W RMS / 100W 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 - 220 -240V 50/60 Hz*
Track System : 2 Track Monaural
: DC - 1 2 -14 V Car Battery
Tape Speed : 4.75 cm / sec.
Power Consumption : AC - 140VA at rated output
FF Time : 190 sec. approx. (C-60)
: DC - 5 A / 12V
Wow & Flutter : 0.35% Nominal
Semiconductors : 17 Transistors
Tape Speed Accuracy : Within +2% -1%
: 11 Diodes
: 2 Zener Diodes
AMPLIFIER SECTION
: 6 LEDs 1 IC
Power Output : 100W RMS (max)
Protections : AC Fuse(2 Amp, 250V)
: 75W RMS at 10% THD
: DC Fuse(10 Amp)
: 70W RMS at 5% THD (Rated)
Indicators : Pilot LED
Input Channels : 4 × Mic 0.6mV (Lo-Z) / 4.7k
: 5 LED Array for output level
: 1 × Aux 100mV / 470k
Dimensions : W385 × H130 × D310 mm
Frequency Response : 50Hz -15,000Hz ±3dB
Net Weight : 9.6 kg
S/N Ratio : >55dB
Tone Control: : Bass:-10dB +7dB at 100 Hz
: Treble: -10dB +7dB at 10 kHz
* This unit is connected to 240V tap when leaving the factory.
Output Taps for speaker : 4, 8, 16 & 100 V
matching
Owing to continuous product upgradation,design & specifications
are subject to change without notice.
Line Output : 1V / 3.5 k
Specifications claimed are subject to permissible production
tolerances.
FEATURES
n Imported Tape Deck Mechanism with Auto Stop used.
n Provision for automatic changeover from AC to Battery Operation ensuring continuity of program.
n 100V line for long distance speaker connections.
n Separate active BASS and TREBLE controls for shaping tonal quality of music & speech as desired.
n LINE OUT for connecting additional booster amplifier.
n Four low impedance Microphone inputs and one Aux. Input. The Aux input is for connecting Mixer, CD Player, etc.
4 85 7 93
2
1
6
18
151617
14
13 12 11
10
-10
6
2 2
+10
6
8
4
0
4
8
LOW IMPEDANCE MIC INPUTS
-10
6
2 2
+10
6
8
4
0
4
8
TAPE
MIC-1
MIC-1
MIC-2
BASS
OUTPUT LEVEL
MASTER
ON -13 -8 -3 0 +3
TREBLE
MIC-2
MIC-3/AUX
MIC-3
MIC
MIC-4/TAPE
MIC-4
PLAY
FF
EJECT
CPA-760
AC/12VDC
AUTO STOP CASSETTE
POWER
6
10
8
0
2
4
6
10
8
0
2
4
6
10
8
0
2
4
6
10
8
0
2
4
6
10
8
0
2
4
21
24
22 2523 26
20
19
FUSE
FUSE 2AT
240V~50Hz
CPA-760
140VA
LINE OUT AUX
12V DC
COM ⇓ ⇓ ⇓ 100V
1. MIC-1 Input Jack Socket
For Connecting a low impedance microphone.
2. MIC-2 Input Jack Socket
For connecting a low impedance microphone.
3. MIC-3 Input Jack Socket
For connecting a low impedance microphone.
4. MIC-4 Input Jack Socket
For connecting a low impedance microphone
5. TREBLE Control
For controlling the high frequency signals.
6. MIC-4 / TAPE Selector Switch
7. FF / EJECT Lever
For fast winding the tape, this lever is pushed in
partially. For ejecting the cassette, it is pushed in
fully.
8. CASSETTE SLOT
The cassette is loaded into the set through this slot.
9. HANDLES
10. POWER switch
11. LED ARRAY
For output level indication.
12. POWER LED
This LED glows to indicate that the set is ON.
13. MASTER Control
For overall adjustment of volume level.
14. BASS Control
For controlling the low frequency signals.
15. MIC-4 / TAPE Volume Control
16. MIC-3 / AUX Volume Control
17. MIC-2 Volume Control
18. MIC-1 Volume Control
19. AC Mains Fuse (Rating 2Amp 250V)
20. AC Mains Cable with plug
21. BATTERY Terminal Strip
For connecting a 12V car battery.
22. SPEAKER Terminal Strip
For connecting speakers or driver units.
23. EARTH Terminal
24. LINE Output Jack Socket
For connecting additional higher wattage amplifier for
obtaining more power output.
25. AUX Input Jack Socket
For connecting an auxiliary source like a CD player,
Tuner, Echo or Audio Mixer etc.
26. ABS Legs
For supporting the unit on its back while handling.
• Front & Rear Panel Controls & Features
• Speaker Connections
16 × 16
16 + 16
Total Impedance:
= 8
4
8 16 100V
COM
󼚈⇓
L1
L2
󼛝⇓
L1
L2
+ 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.
Total Impedance:
32 × 32
32 + 32
= 16
4
8 16 100V
COM
󼚱⇓
L1
L2
󼚱⇓
L1
L2
󼘾⇓
L1
L2
󼘾⇓
L1
L2
+ 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.
4
8 16 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
7
L1
L2
• Operating Procedure
PWR
MON
POWER
C-1
DA 2V
C
TREB
LE
B
A S
S
EEJ
CT
FF
PLAY
0
2
4
6
8
+10
2
0
2
4
6
8
+10
2
FULL REEL
EXPOSED TAPE
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.
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. With all the mic volume controls set at ‘0’ position, raise
MASTER volume control to 7 or 8 position.
2. The BASS and TREBLE controls should be set at ‘0’ (Flat)
position.
3. Move the volume control of MIC-1 slowly to the desired
sound level but not up to the point where howling and
feedback starts.
4. Now repeat the same for MIC-2, MIC-3 and so on.
5. When using a fourth microphone, use MIC-4 jack and
keep the MIC/TAPE selector switch at MIC position.
6. When using Aux as input use RCA jack provided at the
rear panel and keep MIC-3/AUX control at desired level.
7. Now use the MASTER control for raising or lowering the
overall volume level as desired.
8. When playing a tape, keep the MIC/TAPE switch at
TAPE position.
9. The tape can be advanced rapidly by pushing in the FF /
EJECT lever partially.
10. To stop the tape, push in the FF / EJECT lever fully so that
the cassette is ejected out.
11. Due to the Auto Stop system, the cassette is
automatically stopped when the tape comes to an end in
play mode.
12. 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.
󼙞훍양蕁Ꝥ먠虂ﾻ랺뢶뒲󼃘૨웹
󼘻枓뾭魒畴殧㴼폊ޝ髥͏컭红鶼뜂苍짬㝖农뿣⹹璘㠶䗫㫟
󼘣⁌祧鎿癭̂颏蘜媠㛍쌊ꃌ윒嵙矂憬ꟲᚕ羽榴꾫컊엨܂乬譫ᄎ⃆ퟕ퍸ḛ
󼛈ြ짇따巄官輥氂頮ⷃ婋橥͏涸듗∞榴ퟶ䆌袃鶙껰ᐲ㼼㨸󼒄
󼛣鷉ြ뒫䇘쿅屓䫠瘌̀膠暨쳯ሎⱷ싡ⱐ䭇鋝󻿸䊍󻾓輵󼇙縣℟쓂
󼛈ြ⩗䑱麕뙍䏚ឭ脗굵焏㉑䶘똁ﷸ誆臌䳪൘ꏇⰧ⍮屬
󼛣鷉鶛ଂ颗ⴤ懷쩠Ꚗ훒邋긮免띵飚╄捞緈፞꧈쎿먆兌쟔⌡쟄
󼛈ြ⩗쿼쐋ɉ󼛟헌扙龞ః馐蟄그䍢괭䱇Ԁ⇓ϑ⇓°∧ιψ󼚾࢈♉䫰ǿꖢꂞ䏩
󼘣鯇嗢콝觃몱䜾㗌扙鼤穱桟竆쇠⭶쇠⮪
󼛣ฺ⠖䉀󼐤륐雔쭡塏谢롏옑醯꯶䅤恾窼󼛜☡氋武넱籷ᙡ○죩
󼘣乻榕셥ﯺ縔꫱蜝ᐋ轢û䝂㴹蓏㑓黩㑓鸞㰸菎ఇ錸󼖅锻㣞
󼛣鷉鶋峲癭擺邇ି뺹Ԁﯷ䊍覄콏宦쫅徂췉ᐏଆ农飱䃦ܙ뻾
󼘣乻楗莯鵥ﭿᔔଂ頮├늩뙴澓똁
! 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.
TROUBLE CHECKS
The following trouble checks will help to correct the most
common problems encountered with a cassette player.
Pilot LED does not glow when the set is switched ON.
+ AC mains plug not properly connected to AC socket.
+ Car battery connections reversed.
+ Fuse blown. Check and replace with another of the same
rating.
Hum and noise coming from speakers.
+ Poor quality of microphone or microphone cables.
+ AC mains cable running close to the input cables.
Sound quality poor on Microphone operation.
+ Improper impedance matching between microphone and
unit. Use LOW IMPEDANCE microphones.
+ In case of microphones with selectable impedances,
keep the impedance switch at LOW position.
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.
The auto stop mechanism activates and the tape stops
just after it is inserted.
+ The tape is completely wound on the right reel (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.
+ The MIC/TAPE selector switch is at MIC position.
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.
• Precautions, Maintenance & Trouble Checks
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 spiri t / alcohol.
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.
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.
© Copyright Ahuja Radios, 2005. All rights reserved. Any unauthorized reproduction or use of logos, images or design elements is strictly prohibited by law.
No part of the compilation may be reproduced in any manner or translated without written permission.
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Ahuja CPA-760 Operating instructions

Ahuja
Brand
Ahuja
Model
CPA-760
Type
Operating instructions

Ahuja CPA-760

Below you will find brief product information for Ahuja CPA-760.

  • Versatile Audio System: The Ahuja CPA-760 is a versatile audio system designed for a wide range of applications, including conferences, seminars, presentations, and more.

  • Powerful Sound Output: With a power output of 70W RMS, the Ahuja CPA-760 can fill even large rooms with clear and powerful sound.

  • Multiple Input Options: The system features four low-impedance microphone inputs and one auxiliary input, allowing you to connect multiple microphones, instruments, or other audio sources.

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