H-ig41-uatx Rev 1.1 Schematic ~repack~ – Works 100%
This is a niche request, as Foxconn (the manufacturer of the H-IG41-UATX board) does not publicly release schematic diagrams. These are confidential engineering documents.
However, based on standard Intel G41 chipset architecture and the specific board model, here is a technical inference report detailing the power distribution, major ICs, and diagnostic points for the H-IG41-UATX Rev 1.1. h-ig41-uatx rev 1.1 schematic
4. The Integrated Graphics (iGPU)
As an "IG" model, this board has integrated graphics. The schematic outlines the VGA output circuitry. This is a niche request, as Foxconn (the
- Red, Green, Blue (RGB) signals: The schematic traces these from the Northbridge through resistor arrays (termination resistors) to the VGA port.
- DAC (Digital to Analog Converter): If a user reports "No Video," but the board powers up, technicians use the schematic to check for missing voltage on the DAC filter capacitors or broken traces near the VGA connector.
Power input and sequencing
- ATX 24-pin + auxiliary inputs: The schematic accepts standard ATX 24-pin power along with optional 4/8-pin CPU auxiliary input. Power-good and soft-start signals are wired to follow ATX conventions.
- Inrush and bulk capacitors: Input filtering uses an EMI LC network and large electrolytic/solid capacitors to stabilize the 12 V rail before point-of-load conversion.
- Power sequencing and soft-start: A supervisor/PMIC (dedicated IC or discrete MOSFET arrangement) implements controlled soft-start and sequencing for +12 V, +5 VSB, +5 V, +3.3 V, and auxiliary rails to ensure safe bring-up of downstream DC–DC converters and SoC components.
- Power-good and enable signals: PG (power-good) and EN lines feed the reset supervisor and provide status to system firmware.
2. Power Delivery Architecture (VRD 11.1)
Without the schematic, the power sequence is inferred from standard G41 requirements: Red, Green, Blue (RGB) signals: The schematic traces
| Regulator | IC Controller (Typical) | Powers | Enable Signal |
| :--- | :--- | :--- | :--- |
| Vcore | ISL6312 or RT8802A | CPU Core | VRM_EN (from Super I/O) |
| VTT (1.2V) | L6713 or RT9202 | FSB Termination | Vcore_PWRGD |
| Vdimm (1.5V) | RT8120A | DDR3 Memory | ATX_PSON# + 3.3VSB |
| Vcc1_8 (1.8V) | APL5912 | G41 Northbridge PLL | 3.3V_RUN |
| Vcc1_05 (1.05V) | RT8101 | ICH7 Southbridge Core | 3.3V_RUN |
| 3.3VSB | L1117LG (or similar LDO) | Standby (LAN, SIO, PS/2) | ATX_5VSB |
H-IG41-UATX Rev 1.1 Schematic — Essay
Key Features of the Board
- Socket: LGA775
- Chipset: Northbridge G41, Southbridge ICH7
- RAM: 2 x DIMM slots, DDR3 (most variants) up to 8GB
- Graphics: Integrated Intel GMA X4500
- Expansion: 1x PCIe x16, 1x PCIe x1, 2x PCI
- Storage: 4x SATA II ports, 1x IDE (PATA)
2. Where a Schematic Would Be Used
A schematic for this board would be essential for:
- Tracing power sequence (PWRBTN -> SIO -> PCH -> VRM)
- Identifying missing voltage rails (1.05V PCH_VCC, 1.8V DDR, VCCP, VTT_FSB)
- Checking pull-ups / pull-downs on PCIe, USB, or LPC bus
- Bypassing debug headers that are unpopulated on OEM boards
5. Common Faults and Schematic Traces
When repairing an H-IG41-UATX Rev 1.1, technicians typically encounter three specific failures where the schematic becomes indispensable: