Equipped with four DDR3 DIMM slots, supporting a maximum of 32GB of RAM (up to 1600 MHz).
Measure the +3.3V_ALW rail on the linear regulator near the Super I/O chip (commonly an SMSC or Nuvoton IC). If this chip lacks power, it cannot process the power button press. Testing the RTC (Real-Time Clock) Circuit
Before you spend hours hunting for an "E93839 schematic," verify the true model number on that white barcode sticker. It will save you from downloading the wrong diagrams and help you find the specific BIOS updates or pinout guides you actually need for your project.
often host threads where users request and share specific board diagrams for older OptiPlex models. General Electronic Repair : Sites like Electro-Tech-Online dell e93839 motherboard schematic updated
No internal connection, used for cable orientation tracking. Chassis Intrusion
The Voltage Regulator Module (VRM) section converts the 12V output from the ATX power supply into the lower voltages required by the CPU (Vcore), memory (VCCM), and chipset.
Based on technical documentation, the motherboard possesses the following key features: LGA 1151 (Intel 6th/7th Generation Core). Equipped with four DDR3 DIMM slots, supporting a
onto the shorted power rail using a regulated DC lab power supply capped at
If you are looking at the schematic PDF for the E93839 (often labeled Wistron 48.5WH10Y.011 ), here is the most useful path for troubleshooting:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Testing the RTC (Real-Time Clock) Circuit Before you
: The marking E93839 indicates the board was made by Foxconn. Common Dell Models : Boards with this marking are frequently found in the OptiPlex 390 3010/7010/9010 Finding Your Schematic
A less common but frustrating issue is a "dark screen" or "dim VGA output." For the E93839AM0426 variant, the fault was traced back to a single resistor in the VGA signal path (identified as RS111 in the schematic). This is a perfect example of how a schematic can save hours of guesswork.