Structure and Assembly/Disassembly 7-21
1. The button cell model of the main board PCBA is Lithium 3V220mAh D20*3.2.
2. During assembly, please assemble the main board and fasten with the screws, and
then install the CPU module.
7.4.6 Top Cover Assembly of Keyboard
1. Remove plugs fixed on the on the top cover of keyboard (4 for each), and take off the
corresponding panhead screws with washers M3X8 (4 for each).
Figure 7-26 Disassemble the Top Cover of Keyboard (1)
2. Hold the upper edge of the keyboard upper cover assembly, and open up the keyboard upper
cover to the extent till you can remove the screw for fixing the cable connecting the keyboard
and the main unit, as described in the figure, and then pull out the whole keyboard upper
cover assembly.
Figure 7-27 Disassemble the Top Cover of Keyboard (2)
3. After removing one countersunk head self-tapping screw PT3X10 fixed on the top cover of
keyboard and take out the plug of the keyboard and the main unit connecting cables, you
could remove the top cover of keyboard assembly.
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