Quick start
- 1Prepare MP3 audio files
- 2Copy files to the USB root directory
- 3Insert the USB drive into the LC-308S
- 4Connect the bell through the timer
- 5Select the required starting track
Prepare your MP3 files, connect the bell to a programmable timer, select the starting track and test the complete schedule before daily use.
The LC-308S plays MP3 audio stored on a USB flash drive. A connected timer determines when the bell receives power; the bell determines which track plays.
Use custom bell sounds, music or recorded announcements for schools, factories, warehouses and offices. The music-select control advances through the available tracks, while the volume control sets the output level.
Plan a dry, secure wall position that remains accessible for USB replacement and volume adjustment.
| Spec | Value |
|---|---|
| Width | 260 mm |
| Height | 180 mm |
| Depth | 120 mm |
| Rated power | ≤10 W |
The timer acts as the automatic switch between the supply and the music bell.
Electrical work must be carried out safely
Disconnect power before wiring. Check the voltage on the product label. AC mains wiring can cause serious electric shock; use a qualified electrician if you are not trained to perform the installation.
With several MP3 files on the drive, each activation advances to the next track. After the final track, the sequence starts again.
| Activation | Track |
|---|---|
| 1st activation | Track 1 |
| 2nd activation | Track 2 |
| 3rd activation | Track 3 |
Need the same sound every time?
Keep only one MP3 file on the USB drive. This avoids relying on a multi-track sequence.
A single timer may activate several LC-308S bells on the same schedule when the timer, switching device, cable and total electrical load are correctly rated.
This arrangement is useful across school blocks, factory areas, warehouses or multiple floors. Do not connect additional bells until a qualified installer confirms the timer contacts and circuit can safely handle the combined load.
Prepare the drive carefully so the required track order remains easy to test and maintain.
Prepare the USB drive
Select the starting track
Keep a backup of all bell audio
Avoid removing the USB drive while audio is playing. If the order is wrong, delete the files and copy them to the drive again in the intended sequence.
The timer schedule and the USB track order must match. Test the entire day’s sequence after any schedule or audio change.
| Timer event | USB track | Purpose |
|---|---|---|
| 08:00 | Track 1 | Morning assembly |
| 10:00 | Track 2 | Start recess |
| 12:30 | Track 3 | Lunch |
| 17:00 | Track 4 | End of school |
Work through the power, timer, USB and audio checks in that order if the bell misbehaves — see Troubleshooting below.
Stop and disconnect power
if the unit, cable or plug is damaged, unusually hot, wet, sparking or producing a burning smell. Do not open or service the powered unit.
Check the supply, wiring, timer output and AUTO/MANUAL status. Confirm the timer is currently supplying power.
Reinsert the USB drive, confirm the files are MP3, place them in the root directory and try another compatible flash drive.
Use Music Select to find the starting track. If needed, erase the drive and copy the files again in the intended order.
Lower the volume before testing, activate the bell, then increase it gradually. Confirm the MP3 itself contains audible sound.
Test the bell independently to isolate whether the issue is the timer, wiring, supply, USB drive or bell.
Looking for articles instead of a manual? Browse our Guides.
