Lvds Brightness Control Mode Setting (Jp1); Lvds Voltage Selection (Jp2 And Jp3); Restore Bios Optimal Defaults (Jp4); Com1 Data/Power Selection (Jp6) - AXIOMTEK CAPA840 User Manual

CAPA840/843 Capa Board
2.3.1

LVDS Brightness Control Mode Setting (JP1)

This jumper enables you to select PWM or voltage control mode for inverter connector
(CN7). These two control modes are for adjusting the brightness of LVDS panel.
Function
PWM mode (Default)
Voltage mode
2.3.2

LVDS Voltage Selection (JP2 and JP3)

The board supports voltage selection for flat panel displays. Use these jumpers to set
LVDS connector (CN9) pin 1~6 VCCM to +3.3V, +5V or +12V. To prevent hardware
damage, before connecting please make sure that input voltage of the flat panel is
correct.
Function
+3.3V level (Default)
+5V level
Function
+12V level
N/A
2.3.3

Restore BIOS Optimal Defaults (JP4)

Put jumper clip to pin 2-3 for a few seconds then move it back to pin 1-2. Doing this
procedure can restore BIOS optimal defaults.
Function
Normal (Default)
Restore BIOS optimal defaults
2.3.4

COM1 Data/Power Selection (JP6)

The COM1 port has +5V level power capability on DCD and +12V level on RI by setting
this jumper. When this port is set to +5V or +12V level, please make sure its
communication mode is RS-232. You can change the communication mode
(RS-232/422/485) via BIOS setting, see section 4.4.
Function
Power: Set CN17 pin 1 to +5V level
Data: Set CN17 pin 1 to DCD (Default)
Power: Set CN17 pin 8 to +12V level
Data: Set CN17 pin 8 to RI (Default)
10
Setting
1-2 close
2-3 close
JP2 Setting
1-2 close
2-3 close
JP3 Setting
1-2 close
Open
Setting
1-2 close
2-3 close
Setting
1-3 close
3-5 close
2-4 close
4-6 close
JP2
JP3
Board and Pin Assignments