Логический блок лампы для чтения FAW: Критический анализ 2 Основные компоненты для ориентированности на водителя

Добро пожаловать в это важное техническое руководство по Логический блок лампы для чтения FAW (Сборка 566). Это полный, high-efficiency, focused illumination system for the driver and passenger areas of the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This assembly is a critical component for driver comfort, безопасность, and in-cab functionality.

The Логический блок лампы для чтения FAW является а “логика” system designed to provide targeted, low-glare light, allowing the driver or passenger to read logbooks, карты, or tablets without illuminating the entire cab. Этот “логика” is distinct from the main “dome light” (Сборка 565), as its primary purpose is to prevent glare on the windshield and avoid disturbing a co-driver in the sleeper berth.

Это подробное руководство является важным ресурсом для профессиональных технических специалистов и специалистов по запчастям.. Мы разберем всю Логический блок лампы для чтения FAW в свой 2 core component types (в общей сложности 6 куски). We will analyze the critical “логика” of the ‘Reading lamp assembly’ (3714050-91W-C00), its likely LED construction, its integration with the cab’s electrical system, and the specific, vibration-proof ‘Self-tapping screw’ (CQ2714816) fasteners used to mount it.

Основной компонент 1: The ‘Reading Lamp Assembly’ (3714050-91W-C00)

Сердце Логический блок лампы для чтения FAW is the ‘Reading lamp assembly’ (3714050-91W-C00). The parts list calls for two of these, one for the driver and one for the passenger, typically mounted in the headliner or A-pillar.

This component is a sealed, integrated lamp unit. Его “логика” is to provide a very specific *type* of light:

• **Focused Beam:** Unlike a “dome light” which floods the cab, этот Логический блок лампы для чтения FAW uses a projector lens or a deep-set reflector. Этот “логика” creates a tight, narrow “spot” of light.
• **Glare Prevention:** This focused beam is critical for safety. It’s designed to illuminate a small area (like the driver’s lap or logbook) *without* casting any stray light onto the windshield, which would create a dangerous, vision-blocking glare while driving at night.
• **Co-Driver Comfort:** In a “team driving” scenario, this focused “логика” allows one driver to rest in the dark sleeper berth while the co-driver navigates or does paperwork, without being disturbed by a bright cabin light.

**Construction and “Логика” of Illumination:** The Логический блок лампы для чтения FAW is almost certainly an **LED (Light Emitting Diode)** единица. Это критический момент “логика” choice for several reasons, especially compared to old incandescent or halogen bulbs:

* **Power Consumption (The Primary Logic):** This is the most important factor. A driver often uses interior lights with the engine *off*, relying solely on the truck’s batteries (see Assembly 556). A traditional incandescent bulb draws a high amount of amperage, which can easily drain the batteries. The Логический блок лампы для чтения FAW, by using low-draw LEDs, provides bright, focused light for a fraction of the power, protecting the batteries and ensuring the truck will start in the morning. * **Vibration Resistance:** The cab of a truck is a high-vibration environment. The fragile filament of an incandescent bulb would constantly break, leading to high maintenance. An LED is a solid-state, “shock-proof” device with no filament, making it virtually immune to vibration from the engine or road. * **Heat:** An incandescent bulb gets dangerously hot. The Логический блок лампы для чтения FAW, using cool-running LEDs, produces almost no heat, making it safer to touch and preventing it from melting the plastic headliner it’s mounted in. * **Lifespan:** The LED light source is designed to last for tens of thousands of hours, often the entire life of the truck, making this a “fit-and-forget” maintenance component. A reliable Логический блок лампы для чтения FAW is a key part of driver-focused design.

The “Логика” of Integration: Electrical Control

While not explicitly detailed in this parts list, а Логический блок лампы для чтения FAW is part of a wider “логика” network within the cab’s electrical system. The ‘Reading lamp assembly’ (3714050-91W-C00) does not function in isolation.

**1. Power Source:** The Логический блок лампы для чтения FAW is wired into the truck’s 24V “тело” схема, which is powered by the ‘Battery And Mounting Bracket Assembly’ (Сборка 556). Это “constant-hot” схема, meaning it has power even when the truck’s ignition key (the ‘FAW Start Switch’, Сборка 558) is in the “OFF” позиция. Это “логика” that allows a driver to use the lights while resting or searching for items with the engine off.

**2. Control Interface:** The “логика” of control for this specific lamp is typically “local.” The lamp assembly itself contains an integrated “local” выключатель (НАПРИМЕР., a push-button, a rocker switch, or the lens itself acts as a push-button). This allows the driver or passenger to operate their respective light manually and independently, separate from the main “dome” или “courtesy” огни.

**3. Distinction from Courtesy Logic:** Unlike the ‘Sleeper Lighting Assembly’ (Сборка 564) or the ‘Interior Lighting Assembly’ (Сборка 565), а Логический блок лампы для чтения FAW is *not* usually tied to the “door open” схема. This is a deliberate “логика” choice. The courtesy lights are designed to turn on *automatically* when a door is opened. A reading light is designed to be *manual*, so it only comes on when the driver or passenger explicitly requests it. This prevents the bright, focused beam from activating every time the door is opened, which would be distracting and unnecessary. This specialization is the key “логика” принадлежащий Логический блок лампы для чтения FAW.

Основной компонент 2: Система крепления (CQ2714816)

The second component of the Логический блок лампы для чтения FAW is the hardware that mounts it: the ‘Cross recessed pan head self-tapping screw’ (CQ2714816). The parts list calls for four of these, which is a pair of screws for each of the two ‘Reading lamp assembly’ единицы.

This fastener is a key part of the installation “логика” для Логический блок лампы для чтения FAW.

**1. Self-Tapping “Логика”:** The “саморез” (Саморезы) design is a critical manufacturing and service feature. These screws are designed to be driven directly into an unthreaded hole in the truck’s “headliner” (the interior cab roof panel) or its underlying composite/metal support structure. The screw’s hardened threads cut (или “tap”) their own mating threads as they are installed. Этот “логика” creates an extremely tight, точный, and vibration-resistant fit without requiring a separate nut or pre-threaded boss, which would be impossible to access.

**2. Pan Head “Логика”:** The “pan head” (盘头) design is also a specific “логика” choice. This type of screw head is flat on the bottom with a wide diameter. When tightened, it distributes the clamping force over a wide area of the Логический блок лампы для чтения FAW‘s plastic mounting flange. А “countersunk” (tapered) screw would act as a wedge and instantly crack the plastic housing. Этот “pan head” logic prevents stress fractures and ensures the lamp is held *snug* against the headliner, preventing any annoying “жужжит” или “rattles” из Логический блок лампы для чтения FAW while the truck is in motion.

A failure of these simple fasteners would cause the Логический блок лампы для чтения FAW to vibrate, eventually leading to a broken wire or the lamp detaching from the ceiling. Поэтому, using the correct OEM-specified fastener is essential for a long-lasting, тихий, and reliable repair.

FAW Reading Lamp Logic Assembly Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 2 типы компонентов (итого 6 куски) identified in the ‘Reading Lamp Logic Assembly’ (566) схема трактора FAW CA4251P66K24T1A3E5.

Технические характеристики и контекст сборки

Технические характеристики Логический блок лампы для чтения FAW are defined by its function as a low-power, high-reliability, focused interior illumination system. The Логический блок лампы для чтения FAW is a key component for driver comfort and in-cab functionality.