ADLINK NuPRO-841 Industrial Motherboard Maintenance and Troubleshooting

Key Connection Tip: When using COM port ribbon cable to connect RS-422/485 devices, it is necessary to connect the bottom D-Sub 5-pin cable (see Figure 2-8). Standard RS-232 serial port cable cannot be used for differential mode.

3.2 JP2: Clear CMOS

JP2 setting function

1-2 Short circuit (default) Normal operation

2-3 Short circuit clearing of CMOS content

When the BIOS settings are incorrect and unable to start, short circuit pin 2-3 of JP2 for about 2 seconds after power off, restore it to pin 1-2, and then power on again to restore the factory BIOS settings.

3.3 JP3: Watchdog Timer Output Mode

JP3 setting function

1-2 Short circuit (default) NMI (unshielded interrupt) trigger

2-3 Short circuit system reset trigger

After the watchdog timeout, it can choose to generate NMI (which can be captured and processed by software) or reset the system directly. By cooperating with software programming, a two-level protection mechanism can be implemented.

Chapter 4: Detailed Explanation of Key Interfaces and Connectors

4.1 System panel connector (CN1)

CN1 is a 20 pin needle arrangement that integrates all control signals from the front panel

Power LED (Pin1+5V, Pin5 PWLED): Indicates the system's power on status

Speaker (Pin2 SPKR, Pin4 BUZZ): connected to buzzer

Keyboard lock (Pin7 KBLOCK, Pin8+5V): Disable keyboard (short circuit lock)

Reset button (Pin9 GND, Pin10 RESET): Short circuit triggers hardware reset

ATX power switch (Pin15 PSON, Pin11/12 GND): Short circuit triggers soft power on/off

Hard drive LED (Pin14 HDDLED, Pin16+5V): Hard drive activity indicator

Power button (Pin18 PWRBT+5VSB, Pin20 PWRBT -): Connect to the front panel power button

4.2 Power Connection - ATX 12V Auxiliary Power Supply (CN4)

Key Warning: NuPRO-841 must be connected to CN4 (ATX 12V 4-pin power interface) in order to start properly. CN4 provides the+12V auxiliary power supply required by the CPU. If the connection is missed, the system will not be able to power on or run stably.

4.3 IDE interface (CN2 main IDE/CN5 secondary IDE)

Two 40 pin IDE interfaces (2.54mm spacing), supporting ATA-100, each interface can connect 2 devices (master/slave). Supports PIO mode and Ultra DMA/33.

4.4 Other I/O interfaces

CN6 parallel port: 26 pin pin arrangement, supports SPP/EPP/ECP mode

CN11 COM1: Standard DB9 male head, RS-232

CN12 IrDA: 5-pin infrared interface

CN13 LAN: RJ-45 interface (Intel 82562ET)

CN14 audio extension: 9-pin pin layout (with IP-ALCS20 audio daughter card)

CN15/CN16 USB 2.0: Two 9-pin pin headers, totaling 4 USB 2.0 ports

CN17 VGA: 15 pin D-Sub

CN19 PS/2 keyboard/mouse: 6-pin Mini DIN

Chapter 5: Detailed Explanation of BIOS Key Configuration Items

NuPRO-841 uses Award BIOS, press Del key to enter Setup when booting up.

5.1 Standard CMOS Features

IDE device configuration: Supports Auto detection and allows manual setting of Cylinder/Head/Recomp/Landing Zone/Sensor parameters. Manual prompt: "PRECOMP=65535 means NONE"

Access Mode: CHS/LBA/Large/Auto, LBA mode supports large capacity hard drives (>528MB)

Drive A/B: Soft drive type configuration, supporting 360K/1.2M/720K/1.44M/2.88M

Video：EGA/VGA/CGA 40/CGA 80/MONO

Halt On: Control POST error pause behavior

5.2 Advanced BIOS Features

Virus Warning: Protect the boot sector of the hard drive, it is recommended to disable it when running disk tools

CPU L1&L2 Cache: It is recommended to enable to accelerate memory access

Quick Power On Self Test: Enabled can shorten POST time

Boot Sequence: Set the boot device sequence (A, C, SCSI, etc.)

Boot Up NumLock Status: Set NumLock status at boot up

Gate A20 Option: Fast (chipset control)/Normal (keyboard controller control)

Security Option: Setup (password required to enter BIOS only)/System (password required to boot up and enter BIOS)

APIC Mode: Enable/Disable Advanced Programmable Interrupt Controller

5.3 Advanced Chipset Features

DRAM Timing Selectable: By SPD (automatically set according to SPD) or Manual (manually tuned)

CAS Latency Time：1.5/2/2.5

DRAM RAS# to CAS# Delay：2/3

Memory Frequency For：Auto/DDR266

System BIOS Cacheable: Enabled to cache BIOS ROM (F0000h-FFFFFh) for improved performance

Video BIOS Cacheable: Enabled to cache video BIOS

Memory Hold At 15M-16M: Reserve memory address space for ISA expansion cards, disabled by default

Delay Prior to Thermal: 4/8/16/32 minutes

AGP Aperture Size：4~256MB

5.4 Integrated Peripherals

On Chip Primary/Secondary PCI IDE: Enabled Enable IDE channel

IDE Primary/Secondary Master/Slave PIO: Auto or Mode 0-4 manual settings

IDE Primary/Secondary Master/Slave UDMA：Auto/Disabled

USB Controller/USB 2.0 Controller: Enable USB functionality

USB Keyboard Support: Set to Enabled when using a USB keyboard

AC97 Audio: Auto/Disabled (Auto required when using IP-ALCS20 daughter card)

Init Display First: PCI Slot/Onboard (onboard VGA priority or PCI graphics card priority)

IDE HDD Block Mode: Enabled Enable block mode transfer

Onboard Lan Boot ROM: Enable Network Boot (PXE)

Onboard Serial Port 1/2: Set serial port address and IRQ (3F8/IRQ4, 2F8/IRQ3, etc.)

UART Mode Select：Normal/IrDA/ASKIR

UR2 Duplex Mode: Half/Full (Infrared Half Duplex/Full Duplex)

Onboard Parallel Port：378/IRQ7、278/IRQ5、3BC/IRQ7、Disabled