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Bluetooth schematics and debug:
The schematic of BM153 shows as Figure 3.8.2. The supply voltage for this module is
3.3V.
BM153 is high integration module. The module is through the external antenna to
radiate power.
In board level test, if you found the Bluetooth output power is lower or nothing, you should
check if any solder issue on J300, L300 and BM153 first. If their soldering is well, please
exchange BM153 module directly. For debugging follow, please refer to the Figure 3.8.3.
In system level test, if you found that it is difficult to make a connection between DUT
and test station or RSSI value is abnormal. Please check if there is assembly issue on
external antenna. If the assembly is no problem, please exchange the antenna directly to
check if there is material issue. Please refer to the Figure 3.8.4 for detail debugging follow.
Figure 3.8.2
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