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| 1. Check up 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. |
The 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 a paint which will interfere отворачиванию the screw.
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