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

8 Answers

Peavey CS-800 PA power amp 1 channel is out

Channel ''B'' works fine. Channel ''A'' is out. I have checked virtually every component in channel ''A''. I have test equipment. I have compared resistance and diode meter readings between the good and bad channels I have been an electronics tech for over 30 years. This one has me stumped. The -85V is low at about -55 volts only on the bad channel. I have a schematic, but I can't figure this one out. I have meters, a scope, and also a curve tracer. I have metered all the output transistors - they checked good...someone has replaced 2 of the output transistors previously as they are not the same as the others. Channel ''B'' ' s outputs are all the same like the majority of the parts in channel ''A''. I am hesitant to swap the outputs or the driver boards as I am afraid to damage anything in the good ''B'' channel therefore losing my ability to compare 1 to the other...I have about 10 or 12 hours into this now and I am about to return it to the owner and tell them I can't fix it. any help is greatly appreciated Thanks Bill

Posted by on

  • 1 more comment 
  • billmorris52 Jan 26, 2009

    Hello: I am trying to fix this amp myself. I do not want to have to pay others to fix it as it will probably cost more than it is worth. Do you have any knowledgable electronics technicians that know this amp or have I wasted 10 bucks with fixya ? Thanks Bill

  • billmorris52 Jan 27, 2009

    OK: The voltages are now reading the same. +76.5
    and -76.5 volts...using your idea of an overheated component I found that Q6 on the bad channel which is the negative predriver transistor is getting very hot. The same transistor on the good channel is not. The voltages are all wrong in that area too...
    The Schematic I have is a bad copy made a while back. You can obtain a copy from Peavey usually within 2 business days via a request tohttp://www.peavey.com/support/contactinf...
    ask for the old madel CS-800 thats' what this
    is...the original model ( probably 20 years old or more) Thanks Bill. In the meantime I'll take out Q6 and test it. If bad I will replace it....

  • billmorris52 Jan 27, 2009

    As I said in my original post. I have tested all of the output transistors ( all 12 of them)
    on my curve tracer in the bad channel....they all check good to beyond their rated voltages...so I don't think it is the finals....Q6 predriver is hot and nothing else...will remove Q6 and see whats up there and report back in a day or 2. Thanks Bill

×

8 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 17 Answers

I Have a CS800 with one side that was intermittant - found the solder joints cracked around the pins on both back side circut boards where the input and output jack are soldered in- input jack connection would open up and drop audio to that side.

Posted on May 04, 2013

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,976 Answers

If you have unbalanced speakers, you will usually blow out an output transistor. You need a transistor tester to verify this. Make sure you have EXACTLY the same impedance on both sides of the output.

Posted on Jan 27, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 50 Answers

Try to reinstll

Posted on Jan 27, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 326 Answers

For all the details with diagrammattic designs and repairing procedure of cs-800.click the the link below and check out step by step metod of amp repairs.: http://www.amprepair.com/peavey.htm
rate the solution if it helps you fix your problem.thanks

Posted on Jan 27, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 221 Answers

As the amplifier needs to be opened with a proper tools and checked with he meter to locate the faulrty ic or capacitor.as it will be bulged or leaked.

Posted on Jan 26, 2009

  • 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
  • 19,396 Answers

One of the Amp channels is out because one of the power transistors on the amp final is gone.

Test the transistor and replace it.

See: Sci.Electronics FAQ: Repair: Power Amps Repair

Posted on Jan 26, 2009

  • Ginko
    Ginko Jan 27, 2009

    If you have tested all trans, and there is no audio on one channel, then test the controls circuit (balance). Test also output from preamp.

    More the schematics you need to get from Pewey a full service manual with troubleshooting diagrams, as this is no common problem.

    You can download free schematics here To download the file, please, click here !, but that is probably what you already have.

    Get full repair manual from Pewey.


×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

For the -85 to read only -55 would indicate that one of the output transistors has a leak and is loading the power supply. You can verify this be feeling which one is heating up even with no input signal. Since it would be a matched pair, then both outputs of Channel A has to be replaced. Measure the output transistor out of circuit and check collector to emitter to base reverse bias (for leak). Additionally, you may want to check the driver transistors, again for leaks.

Could you post the schematic on a free online file server? Pls post back results. Good luck and thank you for using FixYa.

Posted on Jan 25, 2009

  • Louie  Role
    Louie Role Jan 27, 2009

    Appreciate the update/postback.

    I have emailed to request for a copy of the schematic diagram. Soon as one is available, will postback for more insights.

    In the meantime, pls bear in mind that designs of this period tends to have a "domino effect" that is; if one of the transistor fails, then suspect those before and after it as well.

    Cheers.


×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 350 Answers

Dear FixYa Customer,

In reference to:
peavey AMPLIFIER, 1000 WPC, DDT, 8/4/2 OHMS => Model PV2000...
peavey CS-800 PA power amp 1 channel problem
listed on FixYa Site.....

I read this review of a new PEAVEY Amp @
http://www.musiciansnews.com/live_sound/49/peavey_pv900_stereo_pro_power_amplifier.shtml

"The new PV Series power amps retain their two-channel design, high power points and exclusive peavey features and technologies—such as DDT compression and Turbo-V Cooling. The PV 900 delivers 300 Watts per side into 4 Ohms, 180 "

This makes me believe they've had problems with the channel on other models like the one your trying to fix!

I'd try them direct at this point in your attempt to fix this problem. It looks like they have a great PEAVEY CUSTOMER SUPPORT SITE which I always say "You Should Call 1st!" @

http://www.peavey.com/support/contactinfo/

Peavey Customer Support Site Listed below:


Customer and Technical Support If you have questions concerning product operation, support and warranty, contact one of our Customer Support Representatives toll free at 877-732-8391, by email at customerservice@peavey.com, or by using our Forums.

Parts Department To order replacement parts, please call us at 877-732-8391 (toll free in the US) or 601-483-5365. The Parts Department extension is 1386. Our business hours are 8 a.m. - 5 p.m. Central Time, Monday-Friday. Hold times may be long during peak hours. If you have to wait on hold, feel free to leave a name and number and one of our Parts Sales Coordinators will contact you as soon as possible. Payment can be made via credit card, or we can ship COD to a place of business only.

For parts pricing and availability inquiries only, email the Parts Department at parts@peavey.com

Pricing In the U.S.: domesticsales@peavey.com
Outside of the U.S.: intsales@peavey.com

Repair Assistance To locate an authorized peavey Service Center near you, click here.

For assistance/status of repairs for peavey products and scheduling factory repair appointments, email repair@peavey.com

Marketing Contact Information To communicate with Peavey's Marketing Department concerning marketing or branding opportunities,
email marketing@peavey.com

Product Development Contact Information To contact the product development department directly,
email productdev@peavey.com

For any comments or concerns regarding existing peavey products, please contact our customer service department,
at customerservice@peavey.com

Your Nearest Dealer In the U.S.: U.S. Online Dealer Locator
In Europe: EU Online Dealer Locator
Outside of the U.S. and Europe: intsales@peavey.com

Human Resources hrdept@peavey.com

peavey.com Website webmaster@peavey.com

Corporate Contact Information International Headquarters
peavey Electronics Corporation
5022 Hartley peavey Drive
Meridian, MS 39305
Customer Phone: 601-483-5365
Fax: 601-486-1278

Europe
peavey Electronics LTD
Great Folds Road, Oakley Hay Corby
Northants NN18 9ET England
Tel: +44 (0) 1536 461234
Fax: +44 (0) 1536 747222
Website: www.peavey-eu.com

Hope this is helpful.

Good Luck!
jackiaria

Posted on Jan 25, 2009

  • Jack Iaria
    Jack Iaria Jan 27, 2009

    Have you tried music-electronics-forum where they have repaired the same problem? They give links to downloading schematics, show photos of the unit and places to order parts!

    The link http://music-electronics-forum.com/showt... will take you directly to info on the amp your going to fix!

    I'd dive in deeper but I must go to work now!



    Knowing YOU CAN FIX THIS!


    jack

  • Jack Iaria
    Jack Iaria Jan 28, 2009

    How you doing with your Peavy Guitar amp repair?

    Please rate me!



    Thanks


    jackiaria

×

1 Suggested Answer

  • 32 Answers

SOURCE: Peavey PV 8.5C DDT is activated on channel A even

Check your speakers and Cables. I had some speakers that traveled in my small trailer and the vibrations of the trailer caused the diaphram to back off my horns. Once I got the speakers fixed the DDT light on my power amp stopped staying on so much.

Posted on Jan 20, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Only one channel works on my amp. ?


It depends on brand and size amp... what type of amp. Ask yourself...if it was cheap when you purchased it. It may be cheaper to buy a new one. Please tell me what type and brand. We can go from there.

May 06, 2014 | Peavey Cs 1400 Power Amplifier

3 Answers

Peavey 3/4/5w crossover and Peavey Compressor CEL-2A


While not familiar with this unit I beleive you are right assuming that
you need to be working with a line level signal(post preamp) not a mic
level signal
there are several ways to do this
I also do not know your board or how convoluted a layout you are willing
to go through
Most boards that people who use compressors own(for live pa) have post
preamp "insert"points
failing that you can put your mic on channel 1 and send its signal to
the comp via the aux buss(not raising the channel one fader, but instead
send the signal out the aux to the compressor, then take the out of the
compressor into channel two(which you will not send any aux singal
from) and use the channel 2 fader as your mix level
or you could route the mic to a outboard preamp then compressor then
mixer input

if you hav e subgroups the mic channel could send out a subgroup to the
comp
the only thing you do not want to do(for live pa) is place the comp
after the main mix out

Feb 13, 2008 | Peavey CROSSOVER, STEREO 2-WAY/MONO 3-WAY,...

1 Answer

Peavey pa 120


No It wont, is this a new amp you installing or is it already been installed and was working?

Feb 08, 2014 | Peavey Car Amplifiers

2 Answers

We have an old amplifier from back in the 80's and 90's. Its 500watts, the right channels (both main and sides) work fine and loud, but the left channels produce very low sound. I checked the fuse and its...


Have you checked the final transistors on that weak channel? They may look fine but may be weak. You can pull them and check them on your multimeter with the diode check and cross it with the data sheet for that transistor.

Mar 07, 2011 | Kenwood KAC-5204 350 Watt Max Power Stereo...

1 Answer

Peavey PV 8.5C DDT is activated on channel A even al low volume, channel B works fine. All 8 power transistors on both channels were found OK. Driver transistors and 15V zener diodes are all OK as well....


Check your speakers and Cables. I had some speakers that traveled in my small trailer and the vibrations of the trailer caused the diaphram to back off my horns. Once I got the speakers fixed the DDT light on my power amp stopped staying on so much.

Jan 07, 2010 | Peavey AMPLIFIER, 1000 WPC, DDT, 8/4/2...

1 Answer

My Peavey Mark 3 400 CHANNEL 1 does not put out sound. When you turn the pre gain it will cut in for a sec then out. Channel 2 is good. I checked the readings on the pre gain pot on channel 1 and 2 and...


Transfer Channel 2 speakers to Channel 1 to check if it does put out a sound. If it does, it means that your Channel 2 amplifier is defective. However, if it doesn't,
then your Channel 2 speaker is defective. So, have this checked to find out the result. Defective items needs replacement or be repaired. Send us your e-mail for the result so we can further extend our assistance.

Oct 13, 2009 | Peavey AMPLIFIER, 1000 WPC, DDT, 8/4/2...

1 Answer

Peavey 1500 PA amplifier, no output from channel A


is amp configured correct

use same input and same speaker on both sides

check output fuse on A

if fuse ok then problem is inside unit

get tech to open and check all input and output wiring



Jan 12, 2009 | Peavey AMPLIFIER, 1000 WPC, DDT, 8/4/2...

2 Answers

Ive bought a Peavey 1500 pa amplifier and would like to know are the a b knobs on the front treble and bass.If they are how would I take the outputs at the back of the amp to my Soundcraft mixer.


The Peavey A/B controls are output gain controls. Your mixers stereo output goes into the amps inputs, channels A & B. The Peavey is the output stage to your speaker system. If you you connect the outputs from a power amp to the inputs of a mixer you will blow the mixers input stage, amongst many other things and possibly damage the amplifier too. The bias (Bass, Mid, Treble controls) are on the mixer, not the amplifier. Unless you are using a mixer amp, which you are not. A PA system DOES NOT work in the same way as an intergrated hi fi amp.

Nov 07, 2008 | Peavey AMPLIFIER, 1000 WPC, DDT, 8/4/2...

1 Answer

Peavey Compressor/Limiter and Peavey 3/4/5w Crossover


The correct order is Mixer>EQ>Compressor>Crossover>Amps>Speaker. Here is the link that helped me out. Scott's PA System Tutorial

Feb 13, 2008 | Peavey CROSSOVER, STEREO 2-WAY/MONO 3-WAY,...

1 Answer

Channel 2 volume is very low


You can check if channel 2 is blown by switching around your RCA plugs. If you are using the speaker wires as high power inputs you can change them. I.E. swap the left channel with the right one. I assume you checked the gain control on the amp. If channel 2 works with channel 3's inputs then its your head unit or the wiring. If you are lazy take the amp to a car audio store and ask them to bench test it for you. Hack

Jul 13, 2007 | Nakamichi PA-504 Car Audio Amplifier

Not finding what you are looking for?
Car Amplifiers Logo

Related Topics:

1,261 people viewed this question

Ask a Question

Usually answered in minutes!

Top Peavey Car Amplifiers Experts

yadayada
yadayada

Level 3 Expert

61129 Answers

Mugalu Ali
Mugalu Ali

Level 1 Expert

7 Answers

Pablo Gonzalez

Level 3 Expert

733 Answers

Are you a Peavey Car Amplifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...