is a widely deployed, highly durable component found across several generations of Dell Inspiron, OptiPlex, and Vostro desktop systems.
To find an accurate schematic, you need the OEM part number, not the UL number.
A very specific request!
: Integrated Gigabit Ethernet, VGA, DisplayPort, and up to 10 USB 2.0 ports. Finding Updated Schematics & Manuals
Most boards carrying this UL mark (found in the OptiPlex 390/790/990 series) share these general characteristics: dell e93839 motherboard schematic updated
Details the Pulse Width Modulation (PWM) circuits for the CPU and chassis fans.
Finding an updated schematic for a Dell motherboard can be the difference between a successful component-level repair and throwing away a salvageable system. The designation is one of the most common markings found on Dell OEM boards, yet it remains one of the most misunderstood. is a widely deployed, highly durable component found
The leading community for motherboard repair. Search their "Schematic Requests" section for Dell E93839 or its specific revision number.