ASROCK SBC-250J Service manual

* eDP by pass mode pin denition:
12 : SATA Power Output Connector
13 : CPU FAN Connector (+12V)
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 : SIO_AT_DACC1
1-2 Short : AT Mode
1-2 Open : ATX Mode
3-4 Short : ACC
3-4 Open : No ACC
* Auto clear CMOS when system boot improperly.
4 : Clear CMOS Header (CLRMOS1)
1-2 : Clear CMOS
2-3 : Auto Clear (PWR OFF)
5 : Chassis Intrusion Header (CI1)
1-2 Open : Normal
1-2 Short : Active Case Open
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-250J
SBC-250D
SBC-250L
SBC-250N
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
April 22, 2022 First Release
J_SENSE
OUT2_L
1
MIC_RET
PRESENCE#
GND
OUT2_R
MIC2_R
MIC2_L
OUT_RET
1PIN Signal Name
1SPK L-
2SPK L+
3SPK R+
4SPK R-
1
+5V
SPKR
PIN Signal Name
1GP_C22
2GP_C23
3PWRDN
4GPIO_BLT_UP
5 GPIO_BLT_DW
6GND
7GND
1
1
PIN Signal Name
1GND
2GND
3BL CTL
4BL EN
5 LCD_BLT_VCC
6LCD_BLT_VCC
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#
9LVDS_A_DATA1# 10 LVDS_A_DATA1
7LVDS_A_DATA0 8GND
5 LDDC_DATA 6LVDS_A_DATA0#
3+3.3V 4LDDC_CLK
1LCD_VCC 2LCD_VCC
GND
+5V
+12V
1
GND
1
3 2 1
1
Signal
GND
1
GND
+12V
CPU_FAN_SPEED
FAN_SPEED_CONTROL
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 N/A 34 N/A 31 N/A 32 GND 29 DPLVDD_EN 30 N/A 27 N/A 28 N/A 25 N/A 26 GND 23 GND 24 N/A 21 N/A 22 N/A 19 EDP_AUXP 20 GND 17 GND 18 EDP_AUXN 15 N/A 16 N/A 13 EDP_TX0 14 GND
11 GND 12 EDP_TX0#
9EDP_TX1# 10 EDP_TX1 7N/A 8GND 5 N/A 6N/A 3N/A 4N/A 1LCD_VCC 2LCD_VCC

19 : COM Port Pin9 PWR Setting Jumpers
PWR_COM3 (For COM Port3)
PWR_COM4 (For COM Port4)
1-2 : +5V
2-3 : +12V
20 : Battery Connector (BAT1)
21 : COM1, 2, 3, 4 Headers
22 : GPIO Default Setting (JGPIO_SET1)
1-2 : Pull-High
2-3 : Pull-Low
23 : CAN1_2 (Only supported With SBC-250N)
24 : ESPI Connector
25 : Digital Input / Output Pin Header
(JGPIO1)
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 : USB2.0 Connectors
(USB2_5_6,
USB2_7_8)
27 : System Panel Header
28 : USB3.2 Gen1 Connector (USB3_1_2)
29 : LAN Port (LAN2)
30 : LAN Port (LAN1)
31 : HDMI Port (HDMI1)
32 : Top : USB2.0 Port (USB3_3)
Bottom : USB3.2 Gen2 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 : CON_LBKLT_EN and CON_LBKLT_CTL
Voltage Level (BLT_EN_PWM1)
1-2 : 5V Level
2-3 : 3V Level
35 : VGA Port (VGA1)
Backside :
SIM Socket (SIM1)
PIN RS232 RS422 RS485
1DCD TX- RTX-
2RXD TX+ RTX+
3TXD RX+ N/A
4DTR RX- N/A
5 GND GND GND
6DSR N/A N/A
7RTS N/A N/A
8CTS 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
9GPIO 10 NC
7GND 8GND
5 CAN1_RX0 6CAN2_RX0
3CAN1_TX0 4CAN2_TX0
1+3VSB 2+3VSB
2
1
1 2
9
10
12
910
PIN Signal Name PIN Signal Name
10 GND 9JGPIO_PWR
8GP_D03 7SIO_GP37
6GP_D02 5SIO_GP36
4GP_D01 3SIO_GP35
2PMC_TGPIO0 1SIO_GP34
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.
3 2 1
NA
NA
NA
NA
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+
DUMMY
DUMMY
DUMMY
DUMMY
PIN Signal Name
20 GND 19 C_ESPI_ALERT# 18 N/A 17 N/A 16 +3VSB 15 GND 14 C_ESPI_IO3 13 C_ESPI_IO2 12 C_ESPI_IO1
11 C_ESPI_IO0
10 SMB_DATA_MAIN
9SMB_CLK_MAIN 8GND 7+3V 6GND 5 DEBUG_RESET 4C_ESPI_CS# 3GND 2C_ESPI_CLK
1GND
DUMMY
GND GND
+B
-B
+A
-A
USB_PWR USB_PWR
1