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Need a replacement output for headphone for kenwood amplifier

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Found a local supplier for spare parts

Posted on Jun 25, 2008

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What is the wattage output of the kenwood ka 728 integrated amp?


Specifications Power output: 130 watts per channel into 8? (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.007%
Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 69dB (MC), 87dB (MM), 107dB (line)
Output: 150mV (line)
Dimensions: 340 x 109 x 369mm
Weight: 9.2kg
Year: 1984
Kenwood KA 828 Manual Stereo Integrated Amplifier HiFi Engine

Nov 15, 2016 | Kenwood Audio & Video Receivers

1 Answer

I have a 1987 model kenwood home stereo system ihave a graphic equalizer ge 76 control amplifier kc206 synthesizer tuner kt76 power amp km206 how does the RCA connections hook up which ones go to...


First connect all sources like tuner, cassette player, Cd player into the proper RCA inputs of the control amp, then connect the output of the control amp into the input of the equalizer. Then connect the output of the equalizer into the input of the amplifier. This is how to get the best performance and proper outputs to all the right equipment. The speaker outputs of the amplifier would then go to the speakers.

Let me know if you need more help from me by addressing your post to me, or if you wish to communicate with another expert you can address your post to them I.E. @tech48 or @whoever

Thanks and good luck,

Dave

Sep 27, 2008 | Kenwood Audio & Video Receivers

1 Answer

I would like to add my i-pod to the receiver so i could listen to the music what kind off cable would i need


An i-pod provides a standard headphone level output. The AVR-1803 has nine RCA stereo inputs that will accept the signal from the i-pod. You need a 3.5mm stereo TRS plug on one end and two RCA plugs on the other end to connect your i-pod to your amplifier. Note: Be careful to select a 3.5 mm plug that has a slim enough plastic moulding to fit into the i-pod headphone output. On your amplifier you simply select the analogue input that you have chosen to use. Be careful of levels when you are setting up. Set the volume of your i-pod to about 50% and set the input sensitivity to zero, press play on your i-pod and gradually increase the gain on your amplifier input. Hope this helps, Don.

Dec 08, 2013 | Denon AVR-1803 Receiver

1 Answer

Kenwood KRF-V6070D no audio


• If you have a multimeter, check for DC outputs on the amps,

coming from IC301/401 (hybrid IC)

• Or use a headphones .It could just be some cold solder joints

( if there is no humming in headphones) or regulators

on the power supply.


• Check other inputs, you might find one working.


Let me know if you need further assistance!

Sep 10, 2012 | Kenwood Audio & Video Receivers

1 Answer

System on standby due to short circuit, how do i repair


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.

Dec 12, 2011 | Kenwood Audio & Video Receivers

1 Answer

When i turn on my kenwood kr-v990d it powers up for about 2min then shuts down


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.

Oct 23, 2011 | Kenwood KR-V990D Receiver

1 Answer

My Kenwood VR-705 keeps on cutting out on me. is there anyway to fix this?


hi,
First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the protect show or not . if not, then any of the speaker is damaged. If then also it shows protect you have to check the amplifiers hardware.

AV receivers shows protect mode , when there is a hardware fault in side it. Its a warning that some thing is wrong.
Normally AV receivers show this when any of the output amplifier get some problem. there are six amplifiers in this AV receiver. May occur when the output diver transistors of any of the amplifier become shorted. if the output transistor get shorted this will lead to flow of current through the speakers. To prevent this there is a protection circuit for each channels. One combined output of this protection circuit is connected to the system control. when the any of the output amplifier fails, the protection circuit detects it and switch of the speaker and sent data to the system control. when the system control get this data it will give a warning to the customer through display that PROTECT.
You have to check the amplifier.
for that you need digital multimeter,soledring iron screwdrivers etc
open the amplifier , then power it on. connect the negative terminal of the multimeter any where in the chase( metal body of the amplifer). then connect the positive terminal to all the output transistors emitter pin one by one . the voltage should be bellow 0.5V. If any of the emitter of the transistor shows voltage more than 0.5V., then that amplifier stage is faulty. Remove the transistors and check it. if it is shot then replace with a new one.
after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial.
You can do this easily remove the mains fuse. put the bulb in a holder. now you have to wire from the holder. connect one of it to the one end of the fuse holder and the other wire to the other end of the fuse holder. Why using a bulb is, if there is any further problem in the amplifier stage on which the transistors replaced, there is a possibility of the new transistor get damage. if we use a bulb in serial with its mains supply ,when any overload in the amplifier occur the bulb will drop the current, by lighting itself.
After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check
connect the power and check.
If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components.
ok

Apr 23, 2011 | Kenwood VR-507 Receiver

2 Answers

I am connecting an amplifier to my VR-407 to accomodate more speakers I have installed throughout my home. Where do I connect the amplifier?


Connect the amplifier input to the VR-407 using the receiver's REC OUT jacks for the MD/TAPE input on the back panel. This is a fixed line-level output for recording, and will work fine for driving the additional amp.

Jan 17, 2011 | Kenwood VR-407 Receiver

1 Answer

I lost Audio output Device No audio output when using turntable. Can hear sound with headphone, can hear sound when hooked directly to speaker. Can not get sound out of audio output. Plugged RCA cables...


turntable needs high sensitivity preamp. the output level is so low that it has to be amplified more. usual inputs of turntable are phono input. needs a high sensitive input to handle.hope this help.

Aug 08, 2008 | Kenwood KR-V7080 Receiver

1 Answer

Item does not work


This unit is most likely in protect mode. This occurs when the receiveer detects a problem with the output amplifier section and that section is disabled. The most common failure parts are the output transistors. Expect a parts cost between $15-$40, Add in the local labor rate for the total repair cost.
Dan

May 28, 2008 | Kenwood Audio & Video Receivers

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