1. Check a sound signal, having connected the plug of 1 sound signal to the positive plug to the storage battery, and the plug 2 – to the negative plug.
2. The sound signal should publish a sound. Otherwise replace a sound signal.
Prevention
If necessary, rotating the adjusting screw, adjust a sound tonality. After adjustment put on a screw head and round it a small amount of paint which will interfere with a screw otvorachivaniye.