If you are reading this, you likely have a piece of gear on your bench with a dead "MB1364" module, or you are staring at a PCB with that silkscreened on it. The bad news is that a dedicated, standalone datasheet for the "MB1364" is surprisingly rare in the usual channels (like Alldatasheet or Datasheet Archive).
Documentation for the RJ45 interface and the RMII (Reduced Media Independent Interface) connection to the MCU.
The official MB1364 Schematic Pack typically consists of nine sheets that detail the board’s architecture: mb1364 schematic
Details the decoupling capacitors and power supply pins for the main STM32H7 processor.
Use a function generator (1kHz sine, 100mVpp) into Pin 1. Probe Pin 3 with an oscilloscope. If you see no amplified signal, but the DC offset is present, the output transistor is likely dead—not the MB1364. If you are reading this, you likely have
Without the official Fujitsu blueprint, repairing a circuit with the MB1364 is a game of "pin probing and guessing." If you have a copy of the actual internal schematic, please scan it and upload it to Archive.org. For the rest of us, use the pinout above and check your local VCR repair shops for dead donor boards.
– On-board debugger/programmer based on the newer ST-LINK/V3E technology. STMicroelectronics Key Hardware Features NUCLEO 144 H7 LEGACY - STMicroelectronics The official MB1364 Schematic Pack typically consists of
Provides general configuration details and the table of contents.
The good news? It is likely not a custom ASIC, but rather a (thick film module) used extensively in 1980s and 1990s VCRs, CRT monitors, and industrial power supplies.
The MB1364 appears in bench power supply designs from the 1980s, specifically the and Kenwood PS-910 . Search for:
If you are designing a new PCB and found an MB1364 schematic online, . Replace the MB1364 with a modern part like the LT6090 (high voltage, 140V) or AD8397 (rail-to-rail, high current).
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