Proton 1100 Pre-Amplifier not working

Hi,
F61 is an error code that shows amplifier output chip is defective and need to be replaced in Panasonic SC-AK640 unit.
Amplifier output chip replacement requires soldering work and local repair shop will do this job as it is not user level repair.
Hope these info will help you.
Let me know if you have additional question.
Thanks.

I'VE seen this error many times, if you need an actual transistor changed, you will want to visit the local electronics repair shop. Many computer shops may also be able to repair your problems. I would recommend that bringing in physically to a shop would be your best choice. The Denon AVR-1507 7.1 is far too expensive to simply replace for a bad set of resistors, transistor, or capacitor, ensure that you realize this is something that some be seen in person to repair.

When running multiple amps you need a relay most of the time for the remote wire off the radio this is because the radio was built to power one not multiples. one 12 volt relay may help .check local car audio store. also when hooking up relay it has to have a 12 volt power wire connected to it usually the center pin on the relay is your connection for the power wire the you connect your remote wire from the radio to the relay then connect each amp independently to the relay. Hope this helps write back if not . and if so leave feedback

Change the audio amplifier IC´s are damaged

The ground wire is not properly secured or not hooked up to a valid source.

you need to go tho a block fuse which will be able to handle more load but will still give way before the amp its self would get fried i recommend a 75 fuse or higher

You may have a bad output on the amplifier. I would recommend taking it to a local electronics repair to have fixed, or visit a local stereo shop - preferably a JL Audio dealer. Visit their website at www.jlaudio.com to find a dealer near you. You can have your amplifier sent in to JL Audio for repair by an authorized dealer and you'll get a warranty on the repair work.

Hi...I just picked up an L-A55 secondhand myself. To get the volume up to line level, you'll need to get a pre-amplifier. The one I ordered from Radio Shack just arrived today, and it works beautifully. You may also be able to pick up one from a local electronics or audio-video supply house. Here's the link to the pre-amp I bought.

http://www.radioshack.com/product/index.jsp?productId=2573420

Any service shop should be able to repair your machine. I don't know where you are located and am prevented by Fixya rules from pointing you to a specific referring you to a specific servicer. This type of problem is common and should not be difficult for anyone with experience. If you can provide me with the specific model, I should be able to list the probable defective parts.
Dan

The relay sounds as if it is controlling the "mute" circuitry. If you power down the relay there is no power to the speakers. When you pull it out it is the same thing as putting it in the open position.

Just for giggles, leave relay in, before turning on, unplug your speakers, volume all the way down. Now "mute" the device. first plug the speakers in, if fuse is not blown, try adding a little volume.

With the speakers and volumke down, there is little or no current dfrawn from the amplifier section. If the device blows a fuse this time, I suspect the amplifier control voltage circuitry is bad.

If blown when attaching the speakers, susoect the amplifier circuitry.

Of dourse this does not take into account a good ol' short on the board. This would just mean that the short is AFTER the relay or there is a possibility that the relay control circuit is causing this.

There are multitude of diagnostics for a pre-amp/amp combo and either way, if your not a technician, it needs to be taken some place for proper diagnostics.