A weak signal from your home stereo amplifier can be difficult to diagnose.
Repairing a stereo amplifier that has a weak signal because of serious internal problems may be beyond the capabilities of most average consumers, and in general, major repairs should be left to a professional technician that specializes in the type of equipment you are using. However, there are some small repairs that are within the reach of most users with only a very basic knowledge of how audio equipment works. Does this Spark an idea?
Instructions
1. Remove the audio cabling to disconnect your source components from your amplifier. Test the audio cables for a full signal with a multipurpose cable tester. Cable testers can be purchased through electronic supply shops and many stores that sell musical equipment and recording supplies. Check your manual if you are unsure perform a test on a particular type of audio cable. Replace any faulty cabling with a working cable.
2. Unplug the stereo amplifier's power cable from the wall socket or surge protector. If the power cable can be removed from the back of the stereo amplifier, remove the power cable.
3. Test your power cable for continuity with a multimeter. Multimeters are widely available at hardware and pro audio supply shops as well as through many online retailers. All multimeters are different, so make sure you read instructions on use your multimeter to get an accurate reading for a power cable. Replace a faulty cable with a new cable of the same type.
4. Check the main power fuse in the back of the amplifier for cracks in the filament or burnt areas. Even a small crack in the filament can cause a weak signal or intermittent power, as can a partially or fully blown fuse. Replace a faulty fuse with the exact same type of fuse.
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