UP-3515 (serv.man4). UP3515 Hardware Service Manual - Sharp EPOS Service Manual (repair manual). Page 14

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4) Remove the battery cover.
5) Disconnect one connector, and remove the battery unit.
6) Remove the four screws. Disconnect the direct-connector, and
remove the CPU PWB.
Clamping: 5.0±0.2kgf.cm
2. Sub PWB disassembly
1) Disconnect the two connectors. Remove the earth line. Remove the
ten screws. Remove the sub PWB unit.
Attach in the horizontal direction so that the caulked section of the
earth wire (  is not in contact with the other cables.
$
: Clamping: 5.0±0.5kgf.cm
%
: Clamping: 4.0±0.5kgf.cm
&
: Clamping: 10.0±0.5kgf.cm
'
: Clamping: 3.5±0.5kgf.cm
2) Remove the eight hex screws. Remove the angle from the sub
PWB.
The terminal cover $  comes off. Be careful not to lose it. 
Clamping: 5.0±0.5kgf.cm
A
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B
B
A
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C
C
A
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