Chapter 3
Theory of Operation
P/N 57150002, Revision 5.0 3 - 25 Trimble S, VX, SPS & RTS Service Manual
F
Fig. 3-23 Control panel exploded
HRU board
This board has two functions, providing mechanical mounting for the external Hirose connector and
ESD protection.
Fig. 3-24 HRU Function diagram
KBDQ Board
Display 3.5”
Quimby Board
IAB Board
HRU Board
P1J1
SIDE_ D+
USBVDD
SIDE_ D-
OT G_ID
GN D
UC PW R
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