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One of my channel did not function

My amplifier is 4 channel type. now only 3 channel function, 1 channel front did not function. how to fix this. thanks in advance

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Check for loose connection, if continuity is present from end to end of that channel the next step is crack open the amp and visually look for signs of blown component. If it's a 4 channel amp, you will notice 4 same components if you divide the circuit board by 4 sides.

Posted on May 31, 2010

  • Ed Paje May 31, 2010

    Thanks!

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Please

Posted on Nov 21, 2014

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What boards are applicable on OSN7500?


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interface board N1SLD64 2xSTM-64 optical interface board N4SFD64 2xSTM-64 optical interface board with
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N4SF64 1xSTM-64 optical interface board
(with the forward error correction
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N2SL16, N2SL16A 1xSTM-16 optical interface board N1SF16 1xSTM-16 optical interface board
(with the outband FEC function) N1SF16E 1xSTM-16 optical interface board
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N1SL4A 1xSTM-4 optical interface board N1SLH1 16xSTM-1 signal processing board N1SLT1 12xSTM-1 optical interface board N1EU08 8xSTM-1 electrical interface board N1OU08 8xSTM-1 optical/electrical
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8xSTM-1 line processing board when interfaces are
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1 Answer

I have a 2010 cobalt lt. Today both my feont speakers quit working. And now my turn signals make no noise. Or the door chime or the seatbelt indicator does not work. What causes this and how do I fix it?...


The chimes an turn signal noise come out driver door speaker . Both front speakers not working could be a blown circuit fuse inside the radio or just blown front speaker channel . Your best bet , take it to a GM dealer or someother qualified repair shop . You have no idea of the complexity of this . The radio can set DTC'S - diagnostic trouble codes , believe it or not !
DTC B1025, B1035, B1045, or B1055
DTC B1025 01: Audio Output 1 Left Front Circuit Short to Battery
DTC B1025 02: Audio Output 1 Left Front Circuit Short to Ground
DTC B1035 01: Audio Output 2 Right Front Circuit Short to Battery
DTC B1035 02: Audio Output 2 Right Front Circuit Short to Ground
DTC B1045 01: Audio Output 3 Left Rear Circuit Short to Battery
DTC B1045 02: Audio Output 3 Left Rear Circuit Short to Ground
DTC B1055 01: Audio Output 4 Right Rear Circuit Short to Battery
DTC B1055 02: Audio Output 4 Right Rear Circuit Short to Ground

Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier have a DC bias voltage that is one half of the battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound. This voltage will vary depending on what type of audio is being listened to, talk or music, and type of music, as well as the volume setting of the system. Low volume and talk settings will measure around 1V AC and less, where constant music may measure 3V AC and slightly higher.
DTC B1287 01: Amplifier Control Signal Circuit Short to Battery
DTC B1287 02: Amplifier Control Signal Circuit Short to Ground
DTC B1287 04: Amplifier Control Signal Circuit Open

The radio provides a remote amplifier mute output circuit to control overall muting of the remote amplifier. The amplifier receives pulse width modulated (PWM) signals on the control circuit at varying duty cycle percentages for controlling muted and unmuted functions of the amplifier. Circuitry internal to the radio monitors the remote amplifier mute circuit for faults and sets the appropriate DTC when faults are detected.

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1 Answer

Hello, can someone help me, i want to know how to connect the wires if i want to use 2 channel instead of 4. THANKS IN ADVANCE!!!!!!!!!!!!!


You would want to bridge 2 of the left channels and 2 of the right channels, essentially combining the power output of the amp.

This article should help you out:
http://knowledge.sonicelectronix.com/car-audio-and-video/car-amplifiers/how-to-bridge-an-amplifier.html

Essentially you will just be using 2 channels (left, right) instead of 4 (front left, front right, rear left, rear right) essentially combining the power of those outputs. You'll want to check the amp to see if it tells you which of the outputs should be used for the "bridged" method.

Mar 07, 2011 | Koiiler 8686-C Car Audio Amplifier

1 Answer

Wattage


I have the following specs for you
Basically 150watts per channel using two channels , or 75watts using all four
Here goes:

  • 4 Channel Mosfet Amplifier
  • Advanced Overload and Thermal Protection
  • Metal Film Capacitors/Resistors In Signal Path
  • Frequency Response +/-1dB, 20Hz to 20 kHZ
  • Signal to Noise Ratio (A-weighted) >100dB
  • Max Continuous Bridged Power @ 1% THD 150 watts x 2 into 4 ohms @ 14.4 Vdc
  • Max Continuous Power per Channel @ 1% THD 75 watts x 4 into 2 ohms @ 14.4 Vdc
  • Nominal Continuous Power per Channel @ 1 % THD 35 Watts x 4 into 4 ohms @ 14.4 Vdc
  • IASCA/USAC Power Rating 12 Watts x 4 into 4 ohms @ 12.5 Vdc
  • Minimum Load when Bridged 2 Ohms
  • Minimum Load per Channel 1 Ohm
  • Input Signal Voltage Range 0.1 volts to 2 volts
  • Crossover Type Resisitor Network, Linkwitz Riley,
  • Highpass/Lowpass
  • Crossover Slope 24 dB per octave
  • Crossover Frequency Range 20-550Hz
  • Factory Crossover Setting 85 Hz
  • Auxilary Output Channels 2
  • Auxilary Output Frequency Range Highpass or Lowpass, Opposite of Speaker Output
  • Bass Boost 0- to +18dB @ 45 hZ
  • Power Supply Voltage 10Vdc to 15.5Vdc
  • Recommended Fuse 40 amp
Dimensions 12.25L x 9.25W x 2.10H

May 23, 2010 | Car Audio & Video

1 Answer

Yamaha Amp DSP A-3090 Power/function/Remote


These issues can only be fixed by an audio-tech.

Do a websearch around your area for a repair person

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1 Answer

I have 2 6x9 speakers up front 4 6 1/2 3-ways


Hello rjmiller4039,

Although amps with 5 channels are pretty rare, you can get one. Alpine, Boston Acoustics, Infinity, JL audio, MTX, and Polk all have 5-channels ranging in price from around $350 up to around $1,000. The Alpine PDX-5 will output 75X4 watts RMS for the front and rear stereo channels and 300 watts to the mono sub channel. It is priced at $599.99 at Crutchfield.

Hope this helps.


Sep 18, 2009 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

4 chanel amp I dont know how to conected,to radioand one subwoofer


Hello canelo63,

Your question appears under the product listing for the Dual XPA4100 but the in the text you say the amp is actually a Jensen, so it's not possible to provide specific connection information.

But most bridgeable amps can be connected to a single subwoofer and the other two channels used to drive a set of regular speakers. I'd connect the front speakers to channels 1 and 2 and wire the subwoofer to the bridge connections of channels 3 and 4. On the XPA4100, the bridge terminals are the first (negative) terminal on channel 4 and the last (positive) terminal on channel 3.

Hope this helps.

Jun 01, 2009 | Dual 2-Channel Bridgeable MOSFET Amplifier...

1 Answer

PXA-H700 optimum set up...


The way the EQ is hooked up is correct.

You set the factory radio to a set level, then use the volume on the EQ for everyday adjustments.

I believe your problem lies in the amplification.
Your BOSE amplifier was made to run a 4 channel 8ohm stero load.
Low powered - high in sound quality.

You have swapped the factory 8 ohm speakers (15W) for 4 ohm power hungry ones.
Now the amplifier is working harder to produce the same output.

You would be best served eliminating the factory amplifier and getting 1 good 4 or 5 channel amp to power your speakers.

a 4 channel amplifier could be used stereo (left and right) on channels 1 and 2, (2ohm stereo load)
and bridge channels 3 and 4 for your subwoofer.

For a true surround sound - a 5 channel amplifier could run each speaker individually, and the 5th channel is reserved for the subwoofer.

a small dedicated 75wx4 channel amplifier with built in crossover, and level gain controls - would blow your socks off. It is 200x better than the factory 12Watt amplifier. Your ears will love you for it :D

If you need more help - just let me know.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

May 23, 2009 | Alpine PXA-H700 Car Video Player

1 Answer

I found this amp and I can't seem to figure out what the wattage is?


You are probably aware on how to use these output figures, but I'll write a quick explanation on the specifications for future readers anyways :)

The concpet CC-452 amplifier has the following power output specifications:

Calculated at 14.5 volts DC;

At 4 ohms per channel - 45 watts x 2 (RMS)
At 2 ohms per channel - 70 watts x 2 (RMS)
At 4 ohms bridged - 150 watts x 1 (RMS)


This means that your amplifier would provide 45 watts of power each for your front speakers, which are normally a 4 ohm load per side (45 watts for left, 45 watts for right), that's unless they are one of those exotic higher end brands (eg: Boston Z6s which are 3 ohms). Rarely, you will find speakers that are rated at 2 ohms per side, but in this instance the amplifier will provide 70 watts of power into each speaker. On your speaker specifications, you will find a value termed "nominal impedance" which will give you the ohm rating of the speakers being used..

On the other hand, if you "bridge" both channels into a single channel (using a diagram often marked on the speaker terminals of the amp), you could then provide 150 watts into a subwoofer (providing it was a 4 ohm woofer).

It's not recommended to use this amp bridged under 4 ohms..

Some subwoofers may be lower than 4 ohms, and you will not be able to use this amplifier for these types of speakers without risking amplifier failure. Also, some subwoofers may have 2 seperate voice coils, and you will have to use both channels of the amplifier seperately (not bridged) in order to correctly connect this type of speaker for use.




Oct 28, 2008 | Concept CC-452 Car Audio Amplifier

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