Question about Peavey AMPLIFIER, 1000 WPC, DDT, 8/4/2 OHMS => Model PV2000 Car Audio Amplifier

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No output on channel B OF PEAVY2000AND1200

Damaged outputs and high wattage resistors on channel B were among initial problem.after replacing defective parts the clipping LEDS for ch B would come on as soon as amplifier is plugged in with no output on ch B

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You missed something. Use the good channel (A) to compare resistance and or voltage readings against the defective channel. Obviously you've removed the dead short issues (AC fuse is holding) BUT your signal path is still askew. Any transistors/diodes under suspect should be removed from the circuit for proper testing....Glen

Posted on Apr 30, 2009

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Posted on Jan 02, 2017

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Having trouble under standing rms with speakers. Some speakers rms is per speaker and other are for both speakers.I am looking for soundstream speakers that would be 150 rms per speaker. Thanks


rms is a method of measuring power (wattage) delivered from an amp to a speaker. In almost every case, wattage capacity of speakers is quoted PER SPEAKER. Likewise wattage output is quoted per amp output channel. Assuming a you plan on a single speaker on each output channel of your amp, you should be in good shape if your speaker wattage capacity equals or exceeds your amp's output rating. I've never seen speakers rated as wattage per pair.

(rms is the dominant way of measuring average watts of an ac sine wave signal)

Apr 23, 2017 | Car Audio & Video

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TV turns but the only sound I get is a high pitch noise. Channels work perfectly, only problem I'd audio.


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site....

May 17, 2016 | Televison & Video

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When tv is powered on tv only displaying channel number and sound -no raster. using video mode displays are ok. sound is also ok


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Dec 06, 2014 | Sharp Televison & Video

1 Answer

No high voltage in the h out


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Nov 16, 2014 | Televison & Video

1 Answer

My sansui TV hdlcd3250 turn on but no sound or


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Sep 25, 2014 | Televison & Video

1 Answer

How to stop my rca tv from making high pitch sound


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Sep 01, 2014 | Televison & Video

1 Answer

What problem of sharp crt 21v-w70m dropping voltage in b+ to 80v when i turn on


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
Do a search by type in the brand name of your device at its search box.

Jul 24, 2014 | Sharp Televison & Video

1 Answer

Lights are on but no bass is being played, went out after it got hot.


Blown High output resistors. Definately repairable. Good luck. If you can solder, try removing the high output resistors, replace them with parts from Fry's. Cheap fix. Good luck. Depending on the size of the amp, there will be about 6-10 of them. Check all channels on the amp.

Feb 21, 2011 | Volfenhag ZX-5003 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

I have bad static from my Pioneer vsx 49 Elite


sorry no easy solution as it sounds like the output transistors blew out or the emmitter resistors. you will need a service manual and an multimeter to measure the resistors on or around the audio output transistors they are a low value resistor usually around 1 to 2 watts in size. Do not replace any bad , burnt or discolloered resistors around the audio output transistors as if tou do you might just cause more damage to the output transistorsor audio output stage including the audio driver stage of the amp!!!!!!
Larry Dillon

Aug 27, 2009 | Audio Players & Recorders

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