- ChangChun City, Jilin Province, China
by 
Welcome to this definitive technical analysis of the FAW Video Surveillance System Logic Assembly. This advanced system is a critical safety and security feature for the FAW Jiefang CA4251P66K24T1A3E5 6×4 diesel semi-trailer tractor. It functions as an onboard Digital Video Recorder (DVR) and telematics hub, designed to monitor and record driver behavior, ensure cab security, and provide irrefutable “black box” evidence in the event of an incident.
The “Logic Assembly” designation signifies that this is an integrated, multi-component system, not just a simple camera. The FAW Video Surveillance System Logic Assembly is a “logic” hub that combines a ‘Video Processor Assembly’ (the brain), an ‘Indoor Surveillance Camera’ (the eye), and a ‘4G Antenna’ (the voice). This “logic” allows the system to not only record high-definition video but also to transmit it in real-time to fleet managers.
This in-depth guide is an essential resource for fleet safety managers, technicians, and parts specialists. We will deconstruct the entire FAW Video Surveillance System Logic Assembly into its 7 primary component types, analyzing each Minimum Serviceable Unit (MSU). We will explore the processor’s “black box” function, the camera’s monitoring role, and the critical fastening systems designed to protect this sensitive equipment.
This component is the “longer” and most complex part of the FAW Video Surveillance System Logic Assembly. The ‘Video Processor Assembly’ (7917050-84R) is the central DVR, or “black box,” of the system. It is a dedicated computer, a primary MSU, and the hub for all video-related logic.
Its function is to acquire, process, store, and transmit video data. This unit is fundamentally different from a standard Telematics (T-Box) unit; while a T-Box handles small data packets (GPS, fault codes), this processor is a high-bandwidth device designed to manage multiple, large-volume video streams.
1. Acquisition & Input Logic:
This processor is a multi-channel DVR. While this parts list only specifies the ‘Indoor Surveillance Camera’, this processor (7917050-84R) is the same unit used in the 4-way camera system. Its “logic” is to accept multiple video inputs, typically:
2. Storage & “Black Box” Logic:
The processor’s core “logic” is recording. It houses a robust, shock-proof storage medium (either a high-capacity internal SSD or a secure, lockable SD/HDD bay). It records video on a “loop,” overwriting the oldest footage.
Crucially, the FAW Video Surveillance System Logic Assembly includes an integrated G-sensor. The “logic” of this sensor is to detect a high-G event (a crash, hard brake, or swerve). When this occurs, the processor automatically “locks” the video file from 10 seconds *before* the event to 20 seconds *after* it, saving it in a protected folder that cannot be overwritten. This provides an irrefutable “black box” record for accident reconstruction.
3. Transmission & Telematics Logic:
The processor’s “brain” is connected to the ‘4G Antenna Assembly’ (7903060-95T). This high-speed data link is the “logic” that enables remote management. A fleet manager can send a command to the FAW Video Surveillance System Logic Assembly to:
4. Serviceability (MSU):
The ‘Video Processor Assembly’ is a sealed, high-value MSU. It is not field-repairable. Diagnosis involves checking power, ground, and antenna/camera connections. If the unit fails to record, boot, or communicate, the entire processor is replaced.
This component is the primary sensor for the FAW Video Surveillance System Logic Assembly. The ‘Indoor Surveillance Camera Head Assembly’ is a specialized, heavy-duty MSU.
Driver Monitoring Logic: The “logic” of this inward-facing camera is to monitor the driver and the cab environment. It serves two key safety functions:
Construction: This is not a consumer webcam. It is a ruggedized unit designed to withstand extreme temperatures (from -30°C to +70°C in a sun-baked cab) and constant vibration. Its “logic” includes critical features like a wide-angle lens (to see the entire cab) and, most importantly, infrared (IR) LEDs. These IR lights allow the camera to record a crystal-clear, black-and-white image in total darkness, which is essential for overnight security and night-time driving.
Serviceability (MSU): This camera is a simple plug-and-play MSU. Common failures include a “pink” image (stuck IR filter) or a “black” image (failed sensor). A technician simply disconnects the video/power cable and replaces the camera head assembly.
This is the third critical MSU in the FAW Video Surveillance System Logic Assembly. The ‘4G antenna assy’ is the high-speed data link.
High-Bandwidth “Logic”: This component’s “logic” is to provide a high-bandwidth connection (unlike the low-bandwidth GPRS antenna used by the tachograph). Uploading multi-megabyte video files requires the speed of a 4G/LTE network. This antenna provides the ‘Video Processor’ with a stable, fast connection to the cellular network, enabling its remote telematics features.
Serviceability (MSU): This is a passive MSU. It is a sealed unit, and failures are almost always due to its installation: a pinched coaxial cable, a loose connector, or a poor mounting location (e.g., in a “shadow” of the cab’s metal structure). If the FAW Video Surveillance System Logic Assembly is recording locally but “offline” to the server, this antenna and its cable are the first components to inspect.
A sensitive system like the FAW Video Surveillance System Logic Assembly is only as good as its mounting. The parts list calls out three specific types of fasteners, totaling 12 screws, as critical MSUs.
1. ‘Video Processor Bracket’ (7917055-95T): This is the structural MSU that adapts the processor to the truck’s body. It is designed to hold the processor securely, often with rubber grommets or dampeners to isolate it from shock.
2. ‘Cross recessed pan head self-tapping screw’ (CQ2713516): Four of these. “Self-tapping” logic means they cut their own threads into plastic. These are 100% for mounting the ‘Indoor Surveillance Camera’ to the plastic A-pillar or headliner trim.
3. ‘Cross recessed pan head screw’ (Q2140420): Four of these. These are standard machine screws. Their “logic” is to pass through the ‘Video Processor Bracket’ and thread into pre-existing, threaded metal holes (rivnuts) in the cab’s bulkhead.
4. ‘Cross recessed flat head combination screw’ (Q2320412): Four of these. The “combination” (组合) logic means they have a captive lock washer. These are the most critical, used to fasten the heavy ‘Video Processor’ *to* its bracket. The lock washer is essential to prevent the unit from vibrating loose.
The following table provides the complete, detailed breakdown of all 7 component types identified in the FAW Video Surveillance System Logic Assembly diagram for the FAW CA4251P66K24T1A3E5 tractor.
| Mark | Part No. | Part Name | Quantity |
|---|---|---|---|
| 1 | 7903060-95T | 4G antenna assy | 1 |
| 2 | 7917050-84R | Video processor assy | 1 |
| 3 | 7917055-95T | Video processor bracket assy | 1 |
| 4 | 7917150A505-C00 | Indoor surveillance camera head assy (see drawing) | 1 |
| 5 | CQ2713516 | Cross recessed pan head self-tapping screw | 4 |
| 6 | Q2140420 | Cross recessed pan head screw | 4 |
| 7 | Q2320412 | Cross recessed flat head combination screw | 4 |
The specifications for the FAW Video Surveillance System Logic Assembly are defined by its function as a multi-channel, connected Digital Video Recorder (DVR) for safety, security, and fleet management.
| Vehicle Application | FAW Jiefang CA4251P66K24T1A3E5 6×4 Tractor |
| Component Group | FAW Video Surveillance System Logic Assembly |
| System Type | Multi-Channel DVR with 4G Telematics |
| MSU 1 (Brain) | ‘Video processor assy’ (7917050-84R) |
| MSU 2 (Eye) | ‘Indoor surveillance camera head assy’ (7917150A505-C00) |
| MSU 3 (Link) | ‘4G antenna assy’ (7903060-95T) |
| MSU 4 (Mount) | ‘Video processor bracket assy’ (7917055-95T) |
| Hardware (MSUs 5-7) | 12x Total Screws (Self-Tapping, Machine, Combination) |
| Storage Logic | Loop Recording, G-Sensor Event Locking |
| Telematics Logic | Live View, Remote Download, Event-Based Alerts (via 4G) |
| Camera Features | Infrared (IR) Night Vision, Wide-Angle Lens |
FAW parts, including the Cylinder Block Assembly, are packaged with care to ensure safe delivery. Each component is secured in protective materials to prevent damage during transit. The logistics network guarantees timely shipments worldwide, supporting efficient maintenance operations. Below is an image illustrating the standard packaging for FAW truck parts, showcasing the attention to detail in handling and storage.
This packaging approach minimizes the risk of corrosion or impact damage, ensuring that parts like the FAW Cylinder Block Assembly arrive in perfect condition. Customers can rely on FAW’s logistics for consistent quality and reliability.
FAW is one of China’s oldest and largest automotive manufacturers, with registered capital of RMB 35.4 billion yuan and total assets of RMB 457.83 billion yuan.
CHINA FAW GROUP CO., LTD. (short for FAW), formerly China First Automobile Works, can trace its roots back to Jul 15, 1953, when its first assembly plant started to be constructed. FAW is one of China’s oldest and largest automotive manufacturers, with registered capital of RMB 35.4 billion yuan and total assets of RMB 457.83 billion yuan.
China heavy truck sales global “five in a row”, heavy truck sales global “six in a row”, tractor sales for 16 consecutive years absolute leading industry.
