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Push the module down flat and place the heatsink spacer on the module with the smooth side facing up. Make
sure the orientation is correct by checking alignment of the mounting holes. Place the heatsink on the spacer
and screw it down gently using the four included M2.5 screws.
Fig. 2.3: Heatsink mounting
2.4 Mount the Fan (optional)
The fan is only necessary in exceptionally high ambient temperatures. Under normal conditions, the RK3399-Q7
operates passively cooled.
Place the fan on the heatsink and clip it into place using the provided holder. Connect the cable to the header
labeled FAN on the baseboard.
2.5 Power Up
The EVK modules comes preloaded with software that boots into a full desktop environment on the HDMI output.
For bootloader configuration and Linux console the serial interface can be used. Connect either a Micro-USB or
RS-232 cable to the corresponding port. Select the correct UART with UART selector slider (1). For Micro-USB
the slider has to be in the right position to route the default console UART0 to the USB UART bridge. For RS-232
the slider has to be in the left position and the protocol slider (2) has to be in the RS-232 position.
Connect the power supply and verify the sliders are in the position Normal Boot (4) and Normally Off (5). Press
the Power Button (6) to power the board. You will see the boot progress and later on a login prompt on the serial
interface. If a HDMI display is connected video output will follow shortly after.
RK3399-Q7 User Manual
v1.6
© Cherry Embedded Solutions GmbH
Page 3
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