1. Introducción
This manual provides detailed instructions for the assembly, installation, operation, and maintenance of your JONSBO D400 Black ATX Mid-Tower PC Case. Please read this manual thoroughly before beginning installation to ensure proper setup and safe operation.

Figure 1: JONSBO D400 Black ATX Mid-Tower PC Case with internal components.
2. Características del producto
- Dimensiones: 488mm (L) x 239mm (W) x 514mm (H) (including feet).
- Diseño: Three-dimensional, beveled, curved glass design for clear visibility of internal hardware.
- Soporte de placa base: Compatible with ATX, Micro-ATX, and Mini-ITX BTF motherboards.
- Compatibilidad de GPU: Admite tarjetas gráficas de hasta 450 mm de longitud.
- Soporte de fuente de alimentación: ATX PS2 power supplies, up to 200mm in length.
- Opciones de enfriamiento:
- Air Cooling: CPU cooler height up to 169mm.
- AIO Support: Top 240mm / 280mm / 360mm (optional); Side 360mm (optional).
- Fan Positions: Top (3x 120mm or 2x 140mm), Side (3x 120mm), Rear (1x 120mm), Power Compartment (3x 120mm).
- Bahías de unidad: 2x 2.5" SSD or 1x 3.5" HDD + 1x 2.5" SSD; 1x 2.5" SSD or 1x 3.5" HDD in PSU compartment.
- Puertos de E/S frontales: 1x USB 3.2 Gen2 Type-C, 2x USB 3.0, 1x Audio + 1x Mic (2-in-1).
- Ranuras de expansión: 7.

Figura 2: Lado frontal view of the JONSBO D400 PC Case highlighting the curved glass design.

Figura 3: Producto terminadoview highlighting the D400's design and features.
3. Configuración e instalación
3.1 Instalación de la placa base
The JONSBO D400 supports ATX, Micro-ATX, and Mini-ITX BTF motherboards. Ensure your motherboard is compatible with the case's mounting points. The case is designed to support through-hole for most back-connect motherboards, which helps in reducing visible cables inside the case for a cleaner aesthetic.

Figure 4: Internal layout of the D400 case, ready for motherboard installation.

Figure 5: Illustration of BTF motherboard compatibility and cable management space.
3.2 Instalación de la GPU
The case accommodates GPUs up to 450mm in length. It features 7 PCI slots and supports vertical GPU installation (cable not supplied, requires a third-party adapter bracket).

Figure 6: GPU installation options and length compatibility.
3.3 Instalación de la unidad de fuente de alimentación (PSU)
The JONSBO D400 supports ATX PS2 power supplies up to 200mm in length. The power supply is located at the bottom of the case with independent airflow channels to ensure stable chassis temperatures.

Figure 7: PSU mounting location and dust filter access.
3.4 Instalación del sistema de refrigeración
The case offers extensive cooling support with 10 fan positions and dual AIO radiator support. CPU air coolers up to 169mm in height are supported.
- Top: 3x 120mm or 2x 140mm fans (optional) / 240mm, 280mm, or 360mm AIO radiator (optional).
- Side: 3x 120mm fans (optional) / 360mm AIO radiator (optional).
- Rear: 1x 120mm fan (optional).
- Power Compartment: 3x 120mm fans (optional).

Figure 8: Fan and AIO radiator placement options.
3.5 Drive Bay Configuration
The case provides flexible storage options:
- Back Side: 2x 2.5" SSD or 1x 3.5" HDD + 1x 2.5" SSD.
- PSU Compartment: 1x 2.5" SSD or 1x 3.5" HDD.

Figure 9: Hard drive and SSD mounting locations.
3.6 Puertos de E/S frontales
El panel de E/S frontal incluye:
- 1x USB 3.2 Gen2 Tipo-C
- 2x USB 3.0
- 1x Audio + 1x Mic (2-in-1)
4. Instrucciones de funcionamiento
After successful assembly, connect all necessary peripherals and power cables. Press the power button on the front I/O panel to start your system. Refer to your motherboard and component manuals for specific operating instructions related to your installed hardware.
Video 1: JONSBO D400 ATX PC case overview, demonstrating internal layout and features.
5. Mantenimiento
5.1 Limpieza
Regular cleaning is essential for maintaining optimal performance and longevity of your PC components. Use compressed air to remove dust from fans, radiators, and internal components. Ensure the system is powered off and unplugged before cleaning.
5.2 Filtros de polvo
The JONSBO D400 includes a bottom dust filter. Regularly remove and clean this filter to prevent dust buildup and maintain good airflow. The grille-shaped top cover also allows for multi-angle quick disassembly for cleaning and customization.

Figure 10: Top cover disassembly for maintenance and customization.
6. Solución de problemas
Si encuentra problemas, realice las siguientes comprobaciones básicas:
- Sin energía: Ensure all power cables (PSU, motherboard, GPU) are securely connected. Check the power switch on the PSU.
- Sin pantalla: Verify that your monitor cable is connected to the graphics card (not the motherboard's integrated graphics ports, unless you are using integrated graphics). Reseat the GPU and RAM modules.
- Calentamiento excesivo: Check fan connections and ensure they are spinning. Clean dust filters and internal components. Verify AIO pump operation if installed.
- Componente no detectado: Reseat the component (e.g., RAM, GPU, SSD). Check power and data connections.
For more complex issues, consult the manuals for your individual components (motherboard, GPU, PSU, etc.) or contact JONSBO customer support.
7. Especificaciones
| Característica | Especificación |
|---|---|
| Marca | Jonsbo |
| Nombre del modelo | D400 |
| Tipo de caso | Torre Media |
| Color | Negro |
| Material | Metal |
| Dimensiones del producto (LxAnxAl) | 488 x 239 x 514 mm (19.21 x 9.21 x 20.43 pulgadas) |
| Peso del artículo | 23.5 libras |
| Compatibilidad de la placa base | ATX, Micro-ATX, Mini-ITX (BTF Motherboard Support) |
| Longitud de GPU (máx.) | 450 mm |
| Altura del enfriador de CPU (máx.) | 169 mm |
| Soporte de fuente de alimentación | ATX PS2 (up to 200mm) |
| Soporte de radiador AIO | Top: 240/280/360mm (Optional); Side: 360mm (Optional) |
| Fan Positions | Top: 3x 120mm / 2x 140mm; Side: 3x 120mm; Rear: 1x 120mm; Power Compartment: 3x 120mm |
| Bahías de unidad | 2.5" SSD*2 or 3.5" HDD*1+2.5" SSD*1; 2.5" SSD*1 or 3.5" HDD*1 (PSU Compartment) |
| Puertos de E / S frontales | USB3.2 Gen2 Type-C*1 / USB3.0*2 / AUDIO*1+MIC*1 (2 in 1) |
| Ranuras de expansión | 7 |

Figure 11: Visual representation of JONSBO D400 dimensions and key specifications.
8. Garantía y soporte
For warranty information, technical support, or further assistance, please refer to the official JONSBO webSitio web o contacte a su vendedor. Conserve el recibo de compra como comprobante para reclamaciones de garantía.
JONSBO is committed to providing high-quality products and customer satisfaction. If you have any questions or require support, please do not hesitate to reach out.
Visit the Jonsbo Store: Jonsbo Official Store