Question about Amplifiers & Preamps

2 Answers

Kenwood KA-127 P-off response

We have a Kenwood KA-127 that is old and was working but all of a sudden is shut off and when you power it back on it reads P-off. What can we do to get this working? I am not able to find a manual or anything for this? Any ideas?

Posted by on

  • dumbox Jan 22, 2009

    Kenwood KA 127 - "P-OFF" display
    Problem does not appear to be in the Power Outputs. - scope to the input of the protection relay shows good audio - no dc present. Require service information - schematic


×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 4,234 Answers

This unit is likely to be in "protect" mode. This means that a problem has been detected it the final stage of the amplifier section and the speakers are disabled to prevent damage to either the speakers of the amp. This can be casued by a poor solder connection or defective components inside the amp. Without taking internal measurements, I can not say for sure. Expect a parts cost in the $25-$40 range for this repair. Add in the local labor rate for the total repair cost.

Dan

Posted on Dec 01, 2008

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 4 Answers

Hello I faced the same problem and finally got it repaired with my trusted technician..together we did it...off course you need the Service Manual..Will have to buy one..

Problem one Detected was (a) K1 relay 24VDC that went defective and we repaired it (b) and then a few resistors and capacitors in the protection circuit supplying the +12VDC and -12VDC and the Amp sprang in to action...contact me for a summary of the same fault..(vu2kfr@gmail.com)
but get hold on the manual..

Buy from - http://www.webstore.com/item,pgr,Kenwood-KA127-Amplifier-Service-Manual,name,49042609,auction_id,auction_details

Posted on Feb 03, 2015

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

How do i get a free service manual download of a kenwood ka-127 model stereo integrated amplifier in any digital format?


I doubt you will be able to find a digital copy, and Kenwood dropped their home audio line 2+ decades ago. I probably have a hard copy of the manual, as I was a Kenwood Factory Service Center for over 25 years, however, it is not free. If you would like more information, please visit my website at audioserviceclinic.com. Thank you.

Nov 11, 2014 | Amplifiers & Preamps

1 Answer

Integrated Amp to Power Amp


Unfortunately, there is not. You risk over driving the amp if you do that

Jan 27, 2014 | Amplifiers & Preamps

1 Answer

Have a 1990 era Kenwooed KA -127 that has always worked perfectly, however I just changed out CD players (Sony 5 disc changer that died w/ new CD P-CX355 300 disc changer, also removed taped deck ,...


I would first look for poor solder connections. It is possible that with the moving of the unit, a marginal connection finally broke. This is not unusual for a unit that is 20 years old. Check with a local repair shop for the labor costs, but this unit is definately worth a $100-$150 investment. If you;d like, post your location here and we'll try to provide you with some referrals.

Dan

Sep 06, 2010 | Amplifiers & Preamps

3 Answers

KENWOOD KA-99 INTEGRATED AMPLIFIER MANUAL


Hi...

Does it look like this?

http://www.hifiengine.com/manuals/kenwood/ka-9x.shtml

Mar 27, 2010 | Kenwood Amplifiers & Preamps

2 Answers

My kenwood ka-128 amp keeps randomly shutting off. what can i do to stop it from shutting off? Do i need more power?


you can calculate power needed as follows:-
amplifier power must be 20% more than the total power of all speakers(if total speakers power is 100 watt)you need amplifier of 120 watt at least more is ok.

Dec 04, 2009 | Amplifiers & Preamps

2 Answers

My system has a ka-127 amplifier and i can only


lets go for the simple things first. Make sure that the unit is not in tape monitor mode. If it is in tape monitor, you are hearing the small amount of crosstalk present in any system.

Dan

Sep 10, 2009 | Amplifiers & Preamps

1 Answer

Amplifier will only put out "faint" music, etc, even when the volume is turned all the way up


This may sound silly, but please check to be sure that the tape monitor switch in not engaged. Update this if that is not the problem.

Dan

Sep 29, 2008 | Amplifiers & Preamps

3 Answers

Kenwood ka 9100 amp


Open case and look for fuses in the back check and replace if blown.
make shure power plug is good.check with a volt meter on the input side of the main power transformer.
good luck
big red

Nov 05, 2007 | Amplifiers & Preamps

1 Answer

KENWOOD Power Amplifier


The power amp does need an imput signal ie. tuner, cd , and such to play. You can use the power amp with the other equipment.
Good Luck
BIG RED

Oct 30, 2007 | Yamaha DSP-A3090 7-Channel Amplifier

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

1,569 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts

 Grubhead
Grubhead

Level 3 Expert

4584 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68223 Answers

Are you an Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...