Contents
1 Product Overview .........................................................................................................................5
1.1 Appearance.......................................................................................................................................................5
1.2 Product Models ................................................................................................................................................5
1.3 Product Features...............................................................................................................................................6
2 Maintenance Instructions............................................................................................................8
2.1 Applicable Scope..............................................................................................................................................8
2.2 Precautions.......................................................................................................................................................9
2.3 Obtaining Product and Maintenance Information ............................................................................................9
3 Explosive View Drawing...........................................................................................................10
4 PCBA Components .....................................................................................................................11
4.1 Components on the PCBA ............................................................................................................................. 11
4.2 BOM List .......................................................................................................................................................12
5 Software Upgrade .......................................................................................................................16
5.1 Upgrade Environment ....................................................................................................................................16
5.2 Upgrade Using a microSD Card.....................................................................................................................16
5.2.1 Copying the Upgrade File from the Computer......................................................................................16
5.3 Upgrade Process.............................................................................................................................................17
5.4 Troubleshooting..............................................................................................................................................18
6 Upgrading Using the USB.........................................................................................................19
6.1 Entering USB Upgrade Mode ........................................................................................................................19
6.2 Installing the Driver .......................................................................................................................................19
6.3 Batch Firmware Upgrade ...............................................................................................................................22
7 Maintenance Tools......................................................................................................................24
8 Disassembly Procedure..............................................................................................................26
9 Troubleshooting for Common Failures ..................................................................................35
9.1 Principle .........................................................................................................................................................35
9.2 Startup Failure................................................................................................................................................37
9.2.1 Startup Failure Due to High Current.....................................................................................................37
9.2.2 Startup Failure Due to Low Current......................................................................................................40
9.3 Charge Failure................................................................................................................................................41