The Blackmagic Design Video Assist 3G 5 - Main PCB is the primary internal motherboard for the 5-inch 3G model of the Video Assist. As a critical manufacturer spare part, it serves as the central hub for all video processing, power management, and recording functions. This board is the standard replacement for units experiencing total power failure, corrupted data processing, or physical damage to the input/output ports.
Engineered for Compact Performance
While the 5-inch Video Assist 3G is smaller than its 7-inch counterpart, its Main PCB is packed with the same high-performance architecture. It is designed to handle video signals up to 1080p60 with zero latency. The board facilitates the conversion of incoming signals into professional Apple ProRes and Avid DNx codecs, ensuring that the compact recorder maintains broadcast-quality standards despite its small footprint.
Integrated I/O and Onboard Connections
To maintain the portable "handheld" design of the 5-inch model, all primary connectors are soldered directly to the Main PCB. Replacing the board is the most reliable way to fix broken or intermittent connections. The board includes:
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Micro-SDI (HD-BNC) Connections: Specialized space-saving SDI inputs and outputs for professional monitoring.
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Full-Size HDMI Ports: For easy connectivity with mirrorless and DSLR cameras.
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Single SD Card Slot: The high-speed UHS-I interface logic is integrated for reliable recording.
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Power & Audio: Controls for the 12V DC input and the 3.5mm headphone monitoring jack.
Intelligent Power Management
The Main PCB manages the distribution of power from both the 12V DC barrel jack and the dual Sony L-Series (NP-F) battery plates. It features intelligent switching circuitry that allows for continuous operation when switching power sources, ensuring that your recording isn't interrupted during a battery swap. It also regulates the power sent to the 5-inch LCD backlight to ensure consistent brightness.
Key Features
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Genuine Manufacturer Part: Specifically designed for the 5-inch Video Assist 3G model.
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All-in-One Logic Board: Includes the processor, memory controllers, and the I/O array.
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Blackmagic OS Compatible: Supports all internal software features including 3D LUTs, focus peaking, and false color.
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Direct Chassis Fit: Precision-engineered to align with the 5-inch magnesium alloy frame and mounting points.
Installation Requirements
Replacing the Main PCB on a 5-inch unit is a high-precision task due to the incredibly tight internal tolerances.
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Delicate Components: Requires the handling of extremely small ZIF (Zero Insertion Force) connectors and fragile ribbon cables for the LCD and touch digitizer.
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Thermal Consideration: Proper application of thermal pads or compound is necessary to ensure the main processor dissipates heat into the camera's metal body.
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Static Safety: Must be installed in an ESD-protected environment to avoid damaging the sensitive CMOS and processing chips on the board.
