Question about US Acoustics USX-2050 Car Audio Amplifier

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Principle diagram of 2050 transistor amplifier

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KONZERT AV-502A KARAOKE AMPLIFIER,POOR AUDIO,2-RESISTOR WORN OUT PLS. HELP ME


pls check burnt resistors, if ceramic it's value is .25 0hms 5 watts, if big carbon film resistor it's value is 10 ohms 3 watts. check also power transistors A1941 & C5198. also check driver transistor A940 & C2073

Jan 06, 2013 | Car Amplifiers

5 Answers

Schematic Diagram


I don't have a schematic but I have photos of that amp. What part do you need to identify?

babin_perry@yahoo.com

Jul 21, 2009 | Kicker KX1200.1 Car Audio Amplifier

1 Answer

Need help!!!!!!!!!!!!!


ALPINE ELECTRONICS OF AMERICA, INC.
19145 Gramercy Place, Torrance,
California 90501, U.S.A.
Phone 1-800-ALPINE-1 (1-800-257-4631)

Mar 16, 2009 | Alpine MRD-M500 Car Audio Amplifier

1 Answer

AudioBahn A2300HCT no sound


Generally, if the amplifier smokes, the power supply FETs have failed.

Many times, the output transistors fail and that causes the power supply FETs to fail.

Audiobahn won't release schematics. The amplifiers are relatively simple and a schematic isn't generally required.

If you know how to check the transistors, check them to determine the severity of the damage. If you don't know how to check them, read through the following page following all links provided.

Basic Amplifier Repair

Let me know if you have any other questions.

Sep 04, 2008 | AudioBahn A2300HCT Car Audio Amplifier

1 Answer

DIAGRAM CIRCUIT


An IRF540 is an FET. It's likely being used as an output transistor in that amplifier.

Let me know if you have any other questions.

Aug 02, 2008 | Sony XM-460GTX Car Audio Amplifier

2 Answers

Have a a7 Hc... Blown transistors.. Shematic diagram??


What are the part numbers on the transistors you replaced?

Did you replace transistors in the output section and the power supply section?

Does this amp have the defaced ICs labeled B52 and F16?

Jun 21, 2008 | Cadence A7 HC Car Audio Amplifier

1 Answer

Need a lil ore help!!!


If the overcurrent of DC offset lights are not green, the amplifier probably has blown output transistors.

To eliminate other problems, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up normally (all lights green), the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.

Jan 05, 2008 | Sony XM-2150GSX Car Audio Amplifier

1 Answer

No Audio From Amplifier


I would first check for "rail votage" at the rectifiers... If all of your audio transistors are not getting around 40 volts then check the transistors you replaced. They should be getting a 5 volt (10 volt square wave is checked with a scope) "drive" signal. If half of your power supply transistors are not getting a drive signal then replace the kia494/tl494/kia594/tl594---whatever it is. thats the ic chip that supplies the "drive" signal to the power supply transistors. Also follow the board closely out of the power supply transistor to the 494 chip.. there should be some small driver transistors in between.. make sure they are not shorted or fried as well... let me knoe if you need more help

Aug 17, 2007 | Legacy Audio LA720 Car Audio Amplifier

1 Answer

Amp


Hi, The fuse blows due to a fault in the circuitry which can be: the final transistor pairs or in the DC to DC converter (if it is present) or shorted reverse protection diode (which only happens when the amp is wired wrong even if for just an instant). In any event, it would require going inside. You have to be familiar with component level repair to correct the problem, otherwise it would be best to have an electronics technician have a look at it. Hope this be of some help and pls post again how things turn up. Good luck and kind regards.

Jul 31, 2007 | Scosche Industries Scosche High...

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