Assemblage logique du haut-parleur FAW: Le 6 Composants clés pour un son de qualité supérieure en cabine

Welcome to this in-depth technical breakdown of the Assemblage logique du haut-parleur FAW. C'est le complet, 4-speaker component audio system for the FAW Jiefang CA4251P66K24T1A3E5 6×4 tracteur semi-remorque diesel. Cette assemblée est la “voix” du camion, responsible for translating electrical signals from the cab’s infotainment unit into clear, audible sound for the driver, covering everything from music and phone calls to critical system alerts.

Le “Assemblage logique” la désignation est cruciale. Ce n'est pas une seule partie, but a multi-component system based on an advanced acoustic “logique.” Le Assemblage logique du haut-parleur FAW est un “composant” système, meaning it separates audio frequencies across different, specialized speakers. This design is far superior to cheap “coaxial” speakers, as it uses two dedicated full-range speakers for high/mid frequencies and two dedicated low-frequency speakers (woofers) for bass.

This component-based logic ensures maximum audio clarity and reduced distortion. This guide is essential for audio technicians and parts specialists. Nous déconstruirons l'ensemble Assemblage logique du haut-parleur FAW dans son 6 key component types, analyzing the two types of speakers and the specific fastening system that makes this assembly reliable in a high-vibration truck environment.

Cœur 1: The Clarity Drivers – Full-Range Speakers (MSU 1 & 2)

This section, le “plus long” module of our analysis, covers the most critical components for audio clarity in the Assemblage logique du haut-parleur FAW. These are the ‘Left full-range speaker assy’ (7901015-A01) and the ‘Right full-range speaker assy’ (7901020-A01).

Logique acoustique (Mids & Highs): UN “full-range” speaker is designed to produce the middle and high frequencies (mid-range and treble). This is where the human voice, string instruments, and cymbals “live” in a piece of music. Dans le Assemblage logique du haut-parleur FAW, their “logique” est de fournir une explication claire, crisp sound stage for the driver.

Stereo Imaging and Placement: Having a separate ‘Left’ et 'Bien’ speaker is the foundation of stereo sound. These speakers are typically mounted high up in the cab, either in the A-pillars (the pillars beside the windshield) or in the upper corners of the dashboard, aimed at the driver. Ce “staging logic” est délibéré. By placing these directional speakers at ear-level, le Assemblage logique du haut-parleur FAW crée un “sound stage” that appears to be directly in front of the driver, rather than at their feet. This is essential for understanding navigation prompts and phone calls.

Construction: These speakers are Minimum Serviceable Units (MSU). Each assembly consists of several parts:

• The Cone: Usually made of a stiff, lightweight material like treated paper or polypropylene. This material must be durable enough to resist the extreme temperature swings and high humidity found inside a truck cab.
• The Surround: A flexible ring (often rubber or foam) that attaches the cone to the basket. It allows the cone to move back and forth, creating sound waves.
• The Voice Coil & Aimant: C'est le “moteur” of the speaker. The audio signal from the head unit flows into the voice coil, which becomes an electromagnet that moves within the permanent magnet’s field, pushing and pulling the cone.
• The Basket: A rigid frame (plastic or stamped metal) that holds all the parts together and provides the mounting points.

Facilité d'entretien (MSU): These are high-wear items. The most common failure is a “soufflé” voice coil, caused by overpowering the speaker (turning the volume up too high with distortion). This results in no sound or a “scratchy” son. The surround can also tear or decay, provoquant un “bourdonnant” ou “battement” bruit. En tant que MSU, a technician diagnoses the failed speaker and replaces the single unit (7901015-A01 or 7901020-A01), pas la totalité Assemblage logique du haut-parleur FAW.

Cœur 2: The Bass Drivers – Low-Frequency Speakers (MSU 3 & 4)

This is the second half of the acoustic “logique.” The ‘Left low-frequency speaker assy’ (7901025-A02) and ‘Right low-frequency speaker assy’ (7901030-A02) are the woofers.

Logique acoustique (Lows): Le “logique” of these speakers is to handle only the low-end frequencies (bass and mid-bass). Bass frequencies require moving large amounts of air, which is why these speakers (woofers) are physically larger, with more robust magnets and wider surrounds than their full-range counterparts.

Placement and Component Logic: These speakers are almost always mounted low in the truck doors. Bass is non-directional, so placement is less important for “staging.” The door panel itself acts as a large “enclosure” ou “baffle,” which is necessary for the speaker to produce deep, rich bass tones.

Ce “composant” separation is the most important feature of the Assemblage logique du haut-parleur FAW. The head unit’s amplifier has a “crossover” that sends *only* bass signals (Par exemple, below 200 Hz) to these woofers and *only* high signals (above 200 Hz) to the full-range speakers. Ce “logique” prevents the small full-range speakers from trying to produce bass (which they can’t do well), resulting in dramatically cleaner, louder sound without distortion.

Facilité d'entretien (MSU): Like the full-range speakers, these are primary MSUs. They are even more prone to failure from distortion, as bass notes carry the most power. UN “éclater” sound at high volume is a sign of the voice coil hitting its limit. UN “bourdonnant” sound is often a sign of a loose mounting screw or a separating surround.

Cœur 3: The Fastening System Logic (MSU 5 & 6)

A speaker is a vibration-creating device. Le matériel de montage pour le Assemblage logique du haut-parleur FAW is therefore not just an afterthought—it is a critical system designed to manage that vibration. La liste réclame 16 screws and 16 rondelles.

1. « Vis autotaraudeuse à tête cylindrique à empreinte cruciforme’ (CQ2714216): The parts list calls for sixteen (16) de ceux-ci. Le “autotaraudeuse” logic means they are designed to cut their own threads into the plastic of the door panel or dashboard. The quantity (16) confirms a robust 4-point mounting pattern for each of the four speakers.

2. ‘Washer’ (Q40105): The list also calls for sixteen (16) rondelles. This is arguably the most important “logique” in the fastening system. A speaker’s frame is often made of plastic. A screw head creates a small, point de haute pression. The washer’s logic is twofold:

• Répartition de la charge: It spreads the screw’s clamping force over a wider area of the speaker’s plastic mounting flange, preventing it from cracking.
• Amortissement des vibrations: It acts as a buffer between the metal screw and the speaker frame, et (if it’s a spring washer) fournit une tension constante. This prevents the screw from vibrating loose—the #1 cause de “cliquetis” speakers.

These tiny, low-cost components are critical MSUs. Using the wrong screw or forgetting the washer will result in a failed installation, poor bass response (due to an air leak), and eventual rattling.

FAW Speaker Logic Assembly Parts List

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 6 types de composants identifiés dans le Assemblage logique du haut-parleur FAW schéma du tracteur FAW CA4251P66K24T1A3E5.

Spécifications techniques et contexte d'assemblage

Les spécifications pour le Assemblage logique du haut-parleur FAW are defined by its function as a multi-component audio output system. This assembly is designed to provide clear, full-range sound optimized for the cab’s acoustic environment.