Schematic Best: H-ig41-uatx Rev 1.1
Inside the Foxconn H-IG41-UATX Rev 1.1: A Schematic Analysis
The Foxconn H-IG41-UATX Rev 1.1 is a classic Intel LGA 775 motherboard commonly found in OEM desktop PCs, particularly from HP and Compaq systems (often branded as the Pegatron M2N78-LA or similar variants). For electronics technicians and hobbyists, the schematic diagram for this board is more than just a wiring map—it is the "Rosetta Stone" for diagnosing complex power failures and bringing dead boards back to life.
often host shared schematics or boardview files for this specific revision. component-level repair guide for a specific issue? H Ig41 Uatx User Manual | PDF - Scribd h-ig41-uatx rev 1.1 schematic
Do you have a specific failure on your Rev 1.1 board? Share your symptoms in a repair forum and reference the schematic sheet number—technicians will help you instantly. Inside the Foxconn H-IG41-UATX Rev 1
Understanding the H-IG41-uATX Rev 1.1 Schematic and Layout The H-IG41-uATX (Revision 1.1), also frequently identified by the manufacturer name Foxconn or the HP code Eton, is a Micro-ATX motherboard built on the legacy Intel G41 Express chipset. It was primarily used in budget-friendly HP Pavilion P6000 and Compaq Presario CQ3000 desktop series. Core Technical Specifications III. The Hidden Layers: Power Sequencing
Protection and safety
- Overcurrent and short-circuit protection: Polyfuse or current-limiting MOSFETs on USB, SATA, and 12 V rails with sense resistors feeding fault-detection circuitry.
- Over-voltage/under-voltage protection: Crowbar or MOSFET-based clamps and TVS diodes on input rails and I/O to protect against transients.
- Thermal management: Temperature sensor IC and fan control logic tied to thermal zones; MOSFETs placed with thermal vias or heat-sinking in layout notes.
III. The Hidden Layers: Power Sequencing, Straps, and Test Points
Beyond component interconnect, the schematic encodes the board’s behavior. Power sequencing logic ensures that 3.3V standby is stable before enabling the main 12V rails. A small microcontroller or discrete logic gates (74xx series) manages the front-panel power button, generating the PS_ON# signal to the ATX power supply.