NO SOUND (NO OUTPUT FROM BUILT-IN SPEAKER)

System Settings:
1. Insert music file (MP3) into a USB flash drive
2. Load MUSIC application from the main menu
3. On the top right, check if the speaker icon is marked “X”. If so, enable it by tapping on the X once.
4. Select music file to play from the USB flash drive
5. Exit MUSIC and load RADIO (Built-in speaker test procedure)
6. Main menu > SETTINGS > Ensure BUILT-IN SPEAKER is set to “ON”
7. Check the volume level under SCREEN/VOLUME settings

Troubleshooting:
1. Checking the speaker cable connectors
-Ensure speaker cables are secured with a “click” when locking the two connectors with each other
2. Testing the built-in speaker *Please proceed with caution and at your own risk.
-Disassemble speaker cable connector and use voltmeter to measure resistor value (should read ~ 8 ohm ± 15%); If the difference in rating is >20% or shorted, speaker is deemed defective; Request for replacement unit
3. Testing the main unit (LCD) *Please proceed with caution and at your own risk.
-With the cables disconnected check normal level value [voltage] of each pins: X1 unit – pins 7 and 9 / X2 unit – pins 14 and 16 (see the cable tab for pin assignment)
>When music is playing: X1 unit – 2.3V / X2 unit – 0.14V
> When music is not playing: X1 unit – 2.3~2.8V / X2 unit – 1.2V
If the voltage reads differently from the above values, request for replacement unit.
4. Checking the cable *Please proceed with caution and at your own risk.
-If the voltage from the main unit falls under the normal range, measure the voltage with the cables connected
>When music is playing: X1 unit – 2.3V / X2 unit – 0.14V
> When music is not playing: X1 unit – 2.3~2.8V / X2 unit – 1.2V