I am a technically sound electronic engineer. want to repair my own 5.1channel home theater model it-4800w(post warranty). for which i require the circuit diagram of the same model.

The diagrams are not made available to the public.

How to troubleshoot low sound or no audio from the rear ...

https://us.en.kb.sony.com/.../how-to-troubleshoot-low-sound-or-no-audi...

Aug 15, 2015 - Verify that the rear surround speakers are properly connected to the ...For Dolby® ProLogic surround sound, the center-channel mode must be set to ... the center or rear surround speakers for the Home Theatre (HT) system.

Why Are My Speakers Producing Static? - Electronic House ...

www.electronichouse.com/.../home-audio/why-are-my-speakers-produci...

Here are 3 reasons that speakers produce static and solutions you can try. ... If they are your dedicated front L/R channels speakers in a 5.1 or 7.1 system, you more ...Since you have no problem with your existing rear speakers, if they begin to distort on... Home Theater Subwoofer Puts Boom in This Room · Soundbase vs ...

How to Check if your Speakers are Wired Correctly ' Richard ...

www.richardfarrar.com > Podcasting

Mar 25, 2009 - Attaching speakers to your Hi-Fi system usually only requires a few cables. ..... Is this test applicable for a home theater setup with 5 speakers? ... frontstereo speakers, but to do a similar test on your rear surround speakers would ... Yes, switching polarity on one channel of the amp output to your speakers ...

Pioneer VSX-816 speaker drop out - AVS Forum ' Home Theater ...

www.avsforum.com/.../1068233-pioneer-vsx-816-speaker-drop-out.htm...

Sep 20, 2008 - 30 posts - ‎24 authors
The right front speaker sound drops out intermittently as of about 6 months ago. ...mode and back to Auto Surround would bring the center channel back. ... the push pin that holds several grey wires in place, and pull the wires loose. 9. ..... Is it possible that the cold joints are elsewhere in the system, but that ... Yamaha RX-V663: Intermittent/No Audio in Front ...
4 posts
Jan 23, 2014
Sony Receiver going in to Protect Mode
16 posts
Jan 12, 2012
The Official Sony STR-DH820 Thread
30 posts
Aug 29, 2011
Denon AVR-1910 - No more sound.
30 posts
Feb 15, 2011
More results from www.avsforum.com

It sounds like an internal electronic failure. If you are lucky it may still have some warranty. Check with the place you purchased it, they may be able to warrant it or repair it. This is not a DIY project unless you have the equipment necessary to do the repair.

For more details, just type in the site name "Electro-help" to your search engines' search box [not in the address bar of your browser], and click search. It is an electronic equipments service help site. All details you want are there. Note the position of hyphen in between words in site name, when you type it in. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.

Pull up older posts. You can get all details.

You can locate it either at the bottom part of first search page, or at the top of second page. Detailed descriptions are there to help you.
Sometimes, clicking on advertisements by the side and bottom of each post might help you to get details about the availability of spare parts; price etc:-

I have had problems similar to this on many devices and it is usually a dud LED (light). You can technically de-solder the current LED and replace it but it's not a job for anybody without very good soldering skills.

Check to see if your system is still in warranty as this should be covered. Any electronics repair shop should be able to fix this for you.

Error code ' F61 ' on most Panasonic models indicate that the built-in diagnostics has sensed a fault at the output stage. This would normally refer to a failed output amplifier IC (?P/N RSN704D66P?). In some instances, the fault could also be triggered by:

• strands of Speaker wires inadvertently touching each other;
• faulty speakers;
• failed Cooling Fan of the output IC.

Options then are:

• consider a DIY (do-it-yourself) repair only if familiar with electronic components & circuitry, use of a DVM/VOM and a soldering iron. Access to a Service manual would be an advanatge;
• seek the services of an authorized service center specially if the unit is still under warranty;
• consider other options based on downtime, cost of repair, parts of availability, age of unit and prices of comparable but newer models.

Good luck

yes u will need to chandge input jack from mono to stero radio shack $4 part u need y headphone splitter this should fix ur problem

100 watts per channel both channels driven into 6ohm. You can download the owners manual at http://www2.panasonic.com/consumer-electronics/support/ (Technics and Panasonic are both made by the same company) Then enter your model #. the specs are on page 23 of the manual.

I posted a similar solution here:

http://www.fixya.com/support/t1371697-hooking_up_audio_components

- OPTiC
Electronic Repairs & Service
A DJ Pro Audio Co.

This is directly from Gateway's websit ein regards to this issue.

"
How do I send my Gateway product for service and repair?
You must contact a Gateway technician for authorization to send in a Gateway product for all in or out of warranty repairs. Upon exhausting troubleshooting resources, the technician will determine if a product requires service. Contact technical support through e-mail, chat or by calling the correct number as listed below. You may also contact Gateway technical support at the following:

• Home/Home Office Direct (For products purchased directly from Gateway on or after Jan. 1, 2005): (800) 846-2301
  
• Home/Home Office Direct/Professional Direct (For products purchased directly from Gateway before Jan. 1, 2005): (800) 846-2301
  
• Gateway Retail (Gateway products purchased from any vendor other than Gateway): (408) 273-0808

"