Lm495 Mb 11269-2 Schematic-- Download May 2026

For electronics hobbyists, repair technicians, and audio enthusiasts, few things are as satisfying as bringing a piece of dead equipment back to life. If you are currently troubleshooting a device containing the National Semiconductor (now Texas Instruments) LM495 audio amplifier, you have likely encountered the code MB 11269-2.

In this post, we are taking a deep dive into this specific hardware configuration. We’ll discuss what the LM495 actually is, why the MB 11269-2 designation matters, and—most importantly—how understanding its schematic can save your repair project.

Now, the moment you have been waiting for. You need to download the file. Caution: The internet is full of malware disguised as repair schematics. Avoid "EXE downloaders" and "driver updaters." Lm495 Mb 11269-2 Schematic-- Download

To assist the repair community, we have located a reference schematic for the LM495 in a typical MB 11269-2 configuration.

[CLICK HERE TO DOWNLOAD THE LM495 MB 11269-2 SCHEMATIC PDF] (Note: Please ensure you have a PDF reader installed. If the link is temporarily down, try searching for "National Semiconductor LM495 Application Note" or "LM495 Boomer Series Datasheet" as a reference.) The “11269‑2” is the PCB revision – small

The “11269‑2” is the PCB revision – small component value or layout changes may exist between revisions.

The LM4950 drives the speaker in a Bridge-Tied Load (BTL) configuration. The LM4950 drives the speaker in a Bridge-Tied

You hear the fan spin, and the HDD spins up, but the screen is black. The schematic reveals the "LCD_VDD" enable signal, the "BKLT_EN" (Backlight Enable), and the "BKLT_PWM" dimming signal. You can trace which resistor divider or transistor has failed.

Once you successfully complete the Lm495 Mb 11269-2 Schematic-- Download, follow this workflow: