Table of Contents

DS77U

DisplayPort restrictions of the DS77 Series

The DS77U Series can be used with up to three displays simultaneously. Due to the design of the Intel chipset, please be aware of the following restrictions when setting up your monitor.

Note: In a 3-display setup, the DP output will show no picture while booting in BIOS mode. It will be activated once the OS has loaded the display driver.

Quick Installation Guide

Begin Installation

For safety reasons, please ensure that the power cord is disconnected before opening the case.

  1. Unscrew two screws of the chassis cover.
  2. Slide the cover forward and upward.

Memory Module Installation

This mainboard does only support 1.2 V DDR4 SO-DIMM memory modules.

  1. Locate the SO-DIMM slots on the mainboard.
  2. Align the notch of the memory module with the one of the memory slot.
  3. Gently insert the module into the slot in a 45-degree angle.
  4. Carefully push down the memory module until it snaps into the locking mechanism.
  5. Repeat above steps to install additional memory modules, if desired.

Mass Storage Installation

2.5" HDD/SSD drive

  1. Separate the rack from the chassis by undoing one screw.
  2. Place the HDD or SSD in the rack and secure with two screws, one on each side.
  3. Place the HDD or SSD in the drive bay and push it gently to the right until it clicks into place.
  4. Refasten the screws.

M.2 SSD module

  1. As shown, unfasten the screw first.
  2. Install the M.2 card into its slot and secure with the mentioned screw.

Complete

  1. Replace the covers and refasten the screws.
  2. Complete

Please press the “Del” key while booting to enter BIOS. Here, please load the optimised BIOS settings.

Jumper settings and pinout

COM Port 1

COM1 (RS232)
PinSignal NamePinSignal Name
1DCD2RX
3TX4DTR
5GND6DSR
7RTS8CTS
9RI1-
COM1 (RS422)
PinSignal NamePinSignal Name
1TXD-2TXD+
3RXD-4RXD+
5GND6-
7-8-
9-
COM1 (RS485)
PinSignal NamePinSignal Name
1Data-2Data+
3-4-
5GND6-
7-8-
9-

COM 1 & COM 2 Power Switch

COM PORT Pin 9 “Ring Indicator” (RI) configuration

2 4 6 8 10 JP1 1 3 5 7 9
JP1
COM1 (pin 9)COM2 (pin 9)
Short PinFunctionShort PinFunction
1-2 (Default)RI13-4 (Default)RI2
5-7+5V6-8+5V
7-9+12V8-10+12V

AC Back Auto Power ON

JP9
PinAC Back auto Power ON function
Short 1-2Disable (Default)
OpenEnable
Open (enabled) Short (disabled) 2 2 1 1 JP9 JP9

External Power SW & Clear CMOS

SW2
PinSignal Name
1PWRSW
2+5V
3GND
4RTC_RST#
2 4 SW2 1 3

Operating Position

Please make sure to use either the supplied feet or the VESA mount.