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Hi I have a about 2000 model precision power amplifier 2600 it has lost one channel it is a two channel car amplifier it is signed by a recently deceased racing car driver I have had an electronics bloke have a look at it and he seems to think a hybrid module numberd 09-2515-1000 369643 15 pins to be at fault could you lead me to some where I might be able to purchase on of these items thanks Steve

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You have to rebuild the board.

Posted on Mar 03, 2009

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I am thinking of replacing my now very old JVC AX 330 amplifier with a Marantz PM7003 amplifier and want to know if this is a suitable replacement in terms of power output etc.


You, sir, are a rare adherent to stereo-only electronics. Are you replacing it for cause (showing its age)? The PM7003 is only 2 x 70 watts like the JVC but it also has separable preamp/amps so you COULD upgrade or augment the power output with external amps and still control it all locally.

Of course, any current AVR's do that too and bring digital sources and multichannel audio to the mix for as little as the PM7703 may cost.

Jun 23, 2011 | Audio & Video Receivers

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MY MHC-GNZ7D MUSIC SYSTEM ONLY SHIWING PLEASE WAIT , ITS NOT WORKING PLEASEGIVE ME SUJETION


One possibility is that the power-on speaker protection delay is stuck on. The most common cause of this is a shorted transistor in one of the power amplifier channels. In that case, you will need to replace the speaker driver transistors in that channel. I don't have service information on your particular model; it may use power amplifier modules rather than individual transistors.

The tricky part is identifying the amplifier power and speaker output terminals to test for this problem. To find a shorted output transistor, you need to measure the resistance between the output of each channel and the plus, then the minus power supply connections. There is a relay between the amplifier output and each speaker terminal on the back; this relay is turned off by the speaker protection circuit, so you can't measure from the speaker terminals. If you have a fried transistor, one of the tests will show a resistance of a fraction of an ohm. A good transistor will have a very high resistance or read open. This will be the case whether you have modular amplifiers or discrete transistors.

If you see a blown fuse, that is a strong indication that you do have a fried transistor. Sometimes the speaker protector circuit shuts down fast enough to save the fuse, but not always.

Apr 27, 2011 | Sony Audio & Video Receivers

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I'm running two sets of speakers thru a gfs3 powered by a gfa 5300. the main speakers are on 1, the second room pair on 2. the speakers on 2 will only play when the main speakers are engaged. i recently...


Do you mean Adcom? That detail matters.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Adcom-GFA-5300-Car-Amplifiers-manual/id/582ci558/t/2/

That would mean you're trying to run two rooms with paired mono speakers and a different channel in each room. MMmm, okay.

It's a 2-channel power amp and it isn't really designed for the probable very low imedance you're providing with paired speakers on each terminal. And it has no ability to turn either channel on or off short of denying it a program input on either channel.

Perhaps if you ran one speaker from each channel into each room (impedance permitting), you would have two rooms with traditional 2-channel audio.

Mar 22, 2011 | Audio & Video Receivers

2 Answers

My STR-DE345 has no sound from the center channel, and has not had it for quite some time. Any easy fix/diagnosis? Is there a part I can buy and replace myself?


The center channel on this model uses its own amplifier circuit that is independent from the others. It is usually a 5-9 pin IC attached to the heatsink. It is likely that this IC is defective and needs to be replaced. Unfortunately, I can not know this for sure without taking measurements inside the unit. There is no simple fix for this although this is an easy repair for a service shop. Please seek professional assistance to resolve this. Expect a parts cost in the $25 range.

Dan

Jan 13, 2011 | Sony STR-DE345 Receiver

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I recently hooked up my vizio soundbar to the center output on my RX-V465. I simply hooked up the speaker wire on to the receiver and soldered RCA plugs to hook up the soundbar. Now my receiver randomly...


hi ,
check the is there is any short inside the RCA connector. if so this problem can occur.
also if the center amplifier stage have any problem it will get shut down. may be the output transistor of ur center amplifier get damaged. check the same
ok

Dec 27, 2010 | Yamaha RXV465BL 5.1 Channels Receiver

2 Answers

I have a realistic sta-2600 ,no sound from one channel any suggestions? volume knob maybe?


This model is notorious for cold solder joints. Chances are it needs some touch-up soldering.

Nov 25, 2009 | Onkyo TX-8210 Receiver

1 Answer

Hi My denon avr 2600 keeps clips when turn on


Check the polarity (+/-) of the speaker wires. A typical receiver will try to cut the power to the speaker if it's feeding it too much power or too little power to preserve the speaker and/or receiver. That may be the clipping you're hearing. If the wires are reversed, this can cause the same thing.

Aug 15, 2009 | Denon AVR-2600

1 Answer

Audio distorsionado en canal izqierdo


the input selector switches if they are dirty can make the amplifier sound like it has a blown channel.
compare voltages from the left and right channel and make sure they are identical as well as the power supply,typically + and - 65vdc .check the regulators for the pream,they run panel lights off the same circuit + - 14vdc

May 26, 2009 | Marantz Audio & Video Receivers

1 Answer

My Behringer gx212 ultratwin amplifier started to lose volume last night at band practice and then I smelled buring wiring. I think I lost or am in the process of losing the amp transformer. I think the...


Hi I just recently purchased a Behringer GMX 212 and had similar volume dropout on the clean channel only Channel 2 works better and has more punch in clean mode.I went to the shop where I purchased it with a 7 day warranty from some indian dude here in Nadi Fiji, and there was another GMX 212on the floor so I decided to try it out. This was a new amp. I plugged into the clean channel and turned it up full volume on guitar and amp adn heard the volume drop of in the amp in almost a curve and then the whole amp just cut out. We unplugged and waited, turned the amp off, and then on and stil no sound. We then tried the guitar and cord in another amp. The other amp was fine. Can you solve this problem.......my gut feeling is this happens a lot to Behringer amps.

May 08, 2009 | Audio & Video Receivers

1 Answer

No power


Hello

This isn't a solution I'm afraid but we have also suddenly lost all power for the same Hitachi model (have checked the fuses too) and were wondering if you ever found a solution to your problem?

Mar 11, 2008 | Audio & Video Receivers

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