ASROCK SBC-250 Service manual

* eDP Connector
(on the Backside of PCB)
12 : CPU FAN Connector
(+12V)
13 : SATA Power Output Connector
14 : M.2 Key-E Socket
8 : Backlight & Amp Volume Control
(BLT_VOL1)
9 : Backlight Power Select
(LCD_BLT_VCC) (BKT_PWR1)
1-2 : LCD_BLT_VCC: +5V
2-3 : LCD_BLT_VCC: +12V
4-5 : LCD_BLT_VCC: DC_IN
10 : Inverter Power Control Wafer
(BLT_PWR1)
11 : LVDS Panel Connector
1 : Front Panel Audio Header
2 : 3W Audio AMP Output Wafer
3 : DACC1
Open : No ACC
Short : ACC
* Auto clear CMOS when system boot improperly.
4 : Clear CMOS Header (CLRMOS2)
Open : Normal
Short : Auto Clear CMOS (Power O󰀨)
5 : ATX/AT Mode Jumper (SIO_AT1)
Open : ATX Mode
Short : AT Mode
6 : 2-Pin Buzzer Header
7 : Panel Power Selection (LCD_VCC)
(PNL_PWR1)
1-2 : +3V
2-3 : +5V
3-4 : +5V
4-5 : +12V
Jumpers and Headers Setting Guide
SBC-250
The terms HDMI® and HDMI High-Denition
Multimedia Interface, and the HDMI logo are
trademarks or registered trademarks of HDMI
Licensing LLC in the United States and other
countries.
1
Revision History
Date Description
December 14, 2021 First Release
J_SENSE
OUT2_L
1
MIC_RET
PRESENCE#
GND
OUT2_R
MIC2_R
MIC2_L
OUT_RET
1PIN Signal Name
1 SPK L-
2 SPK L+
3 SPK R+
4 SPK R-
1
+5V
SPKR
PIN Signal Name
1 GPIO_VOL_UP
2 GPIO_VOL_DW
3 PWRDN
4 GPIO_BLT_UP
5 GPIO_BLT_DW
6 GND
7 GND
1
1
1
PIN Signal Name
1 GND
2 GND
3 BL CTL
4 BL EN
5 LCD_BLT_VCC
6 LCD_BLT_VCC
7 eDP_BKLTCTL
8 eDP_BKLTEN
1
39 40
2
PIN Signal Name PIN Signal Name
39 LCD_BLT_VCC 40 LCD_BLT_VCC
37 CON_LBKLT_CTL 38 LCD_BLT_VCC
35 GND 36 CON_LBKLT_EN
33 LVDS_B_CLK# 34 LVDS_B_CLK
31 LVDS_B_DATA3 32 GND
29 DPLVDD_EN 30 LVDS_B_DATA3#
27 LVDS_B_DATA2# 28 LVDS_B_DATA2
25 LVDS_B_DATA1 26 GND
23 GND 24 LVDS_B_DATA1#
21 LVDS_B_DATA0# 22 LVDS_B_DATA0
19 LVDS_A_CLK 20 GND
17 GND 18 LVDS_A_CLK#
15 LVDS_A_DATA3# 16 LVDS_A_DATA3
13 LVDS_A_DATA2 14 GND
11 GND 12 LVDS_A_DATA2#
9 LVDS_A_DATA1# 10 LVDS_A_DATA1
7 LVDS_A_DATA0 8 GND
5 LDDC_DATA 6 LVDS_A_DATA0#
3 +3.3V 4 LDDC_CLK
1 LCD_VCC 2 LCD_VCC
PIN Signal Name
40 NA
39 LCD_BLT_VCC
38 LCD_BLT_VCC
37 LCD_BLT_VCC
36 LCD_BLT_VCC
35 SMB_CLK_MAIN
34 SMB_DATA_MAIN
33 eDP_BKLTCTL_R
32 eDP_BKLTEN
31 GND
30 GND
29 GND
28 GND
27 eDP_HPD_CON
26 GND
25 GND
24 GND
23 GND
22 NA
21 LCD_VCC
20 LCD_VCC
19 LCD_VCC
18 LCD_VCC
17 GND
16 eDP_AUX#_CON
15 eDP_AUX_CON
14 GND
13 eDP_TX0_CON
12 eDP_TX#0_CON
11 GND
10 eDP_TX1_CON
9 eDP_TX#1_CON
8 GND
7 eDP_TX2_CON
6 eDP_TX#2_CON
5 GND
4 eDP_TX3_CON
3 eDP_TX#3_CON
2 GND
1 NA
40
1
EDP1
40
1
FAN_SPEED
FAN_SPEED_CONTROL
+12V
GND
4
2
3
1
GND
+5V
+12V
1
GND

19 : COM Port Pin9 PWR Setting Jumpers
PWR_COM3 (For COM Port3)
PWR_COM4 (For COM Port4)
1-2 : +5V
2-3 : +12V
20 : COM1, 2, 3, 4 Headers
21 : GPIO Default Setting (JGPIO_SET1)
1-2 : Pull-High
2-3 : Pull-Low
22 : CAN1_2
23 : ESPI Connector
24 : Digital Input / Output Pin Header
(JGPIO1)
25 : USB2.0 Connectors
(USB2_5_6,
USB2_7_8)
15 : M.2 Key-M Socket
16 : M.2 Key-B Socket
17 : SATA3 Connector
(SATA3_1)
18 : 4-pin DC-in PWR Connector
(Input +12V)
1-4 : GND
2-3 : DC Input
26 : System Panel Header
27 : USB3.2 Gen1 Connector (USB3_1_2)
28 : UAR2 Header
29 : LAN Port (LAN2)
30 : LAN Port (LAN1)
31 : HDMI Port (HDMI1)
32 : Top : USB2.0 Port (USB3_3)
Bottom : USB3.2 Gen1 Port (USB3_4)
33 : Brightness Control Mode (BLT_PWM1)
1-2 : From eDP PWM to CON_LBKLT_CTL
2-3 : From LVDS PWM to CON_LBKLT_CTL
* Please set to 1-2 when adjusting brightness by Brightness Control bar under OS.
* Please set to 2-3 when adjusting brightness by BLT_VOL1.
34 : VGA Port (VGA1)
Backside :
EDP Connector (EDP1. Refer to No. 11)
SIM Socket (SIM1)
PIN RS232 RS422 RS485
1 DCD TX- RTX-
2 RXD RX+ N/A
3 TXD TX+ RTX+
4 DTR RX- N/A
5 GND GND GND
6 DSR N/A N/A
7 RTS N/A N/A
8 CTS N/A N/A
9COM1, 2: N/A
COM3, 4: PWR
COM1, 2: N/A
COM3, 4: PWR
COM1, 2: N/A
COM3, 4: PWR
* This motherboard supports RS232/422/485 on COM3 port. Please refer to below
table for the pin denition. In addition, COM3 port (RS232/422/485) can be adjusted
in BIOS setup utility > Advanced Screen > Super IO Conguration. You may refer to
our user manual for details.
COM Port Pin Denition
1
GND
RESET#
PWRBTN#
PLED-
PLED+
GND
HDLED-
HDLED+
1
GND
PIN Signal Name PIN Signal Name
9 GPIO 10 NC
7 GND 8 GND
5 CAN1_RX0 6 CAN2_RX0
3 CAN1_TX0 4 CAN2_TX0
1 +3VSB 2 +3VSB
2
1
1 2
9
10
12
910
PIN Signal Name PIN Signal Name
10 GND 9JGPIO_PWR
8SIO_GP33 7SIO_GP37
6SIO_GP32 5SIO_GP36
4SIO_GP31 3SIO_GP35
2SIO_GP30 1SIO_GP34
DUMMY
GND GND
+B
-B
+A
-A
USB_PWR USB_PWR
1
1
IntA_PB_D+
Dummy
IntA_PB_D-
GND
IntA_PB_SSTX+
GND
IntA_PB_SSTX-
IntA_PB_SSRX+
IntA_PB_SSRX-
Vbus
Vbus
IntA_PA_SSRX-
IntA_PA_SSRX+
GND
IntA_PA_SSTX-
IntA_PA_SSTX+
GND
IntA_PA_D-
IntA_PA_D+
Installation of ROM Socket
* Do not apply force to the actuator cover after ic inserted.
* Do not apply force to actuator cover when it is opening over 120
degree, Otherwise, the actuator cover may be broken.
* The yellow dot (Pin1) on the ROM must be installed at pin1 position of
the socket (white arrow area).
* Make sure the white dot on the ROM is installed outwards of the
socket.
* For further details of how to install ROM, please refer to ASRI website.
Warning: If the installation does not follow as the picture, then it
may cause severe damage to chipset & MB.
PIN Signal
Name PIN Signal Name PIN Signal Name PIN Signal Name PIN Signal Name
2UART_
RRXD 4GND 6GND 8UART_ CCTS# 10 X
1GND 3UART_
TTXD 5GND 7UART_ RRTS# 9GND
1
2
9
10
1
PCIE_TXN
PCIE_TXP
PCIE_RXP
PCIE_RXN
PERn0
PERp0
PETn0
PETp0