1. Einleitung
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. Produktmerkmale
- Abmessungen: 488mm (L) x 239mm (W) x 514mm (H) (including feet).
- Design: Three-dimensional, beveled, curved glass design for clear visibility of internal hardware.
- Motherboard-Unterstützung: Compatible with ATX, Micro-ATX, and Mini-ITX BTF motherboards.
- GPU Compatibility: Unterstützt Grafikkarten mit einer Länge von bis zu 450 mm.
- Netzteilunterstützung: ATX PS2 power supplies, up to 200mm in length.
- Kühloptionen:
- 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).
- Laufwerksschächte: 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.
- E/A-Anschlüsse vorne: 1x USB 3.2 Gen2 Type-C, 2x USB 3.0, 1x Audio + 1x Mic (2-in-1).
- Erweiterungssteckplätze: 7.

Abbildung 2: Vorderseite view of the JONSBO D400 PC Case highlighting the curved glass design.

Abbildung 3: Produkt überview highlighting the D400's design and features.
3. Einrichtung und Installation
3.1 Motherboard-Installation
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 GPU-Installation
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 Installation des Netzteils (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 Installation des Kühlsystems
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
Das Gehäuse bietet flexible Aufbewahrungsmöglichkeiten:
- 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 Front-I/O-Anschlüsse
Das vordere I/O-Panel umfasst:
- 1x USB 3.2 Gen2 Typ-C
- 2x USB 3.0
- 1x Audio + 1x Mic (2-in-1)
4. Bedienungsanleitung
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. Wartung
5.1 Reinigung
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 Staubfilter
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. Fehlerbehebung
Sollten Probleme auftreten, führen Sie die folgenden grundlegenden Überprüfungen durch:
- Kein Strom: Ensure all power cables (PSU, motherboard, GPU) are securely connected. Check the power switch on the PSU.
- Kein Bildschirm: 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.
- Überhitzung: Check fan connections and ensure they are spinning. Clean dust filters and internal components. Verify AIO pump operation if installed.
- Komponente nicht erkannt: 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. Spezifikationen
| Besonderheit | Spezifikation |
|---|---|
| Marke | Jonsbo |
| Modellname | T400 - Die wunderbare Welt der Träume |
| Gehäusetyp | Mittlerer Turm |
| Farbe | Schwarz |
| Material | Metall |
| Produktabmessungen (L x B x H) | 488 x 239 x 514 mm (19.21 x 9.21 x 20.43 Zoll) |
| Artikelgewicht | 23.5 Pfund |
| Motherboard-Kompatibilität | ATX, Micro-ATX, Mini-ITX (BTF Motherboard Support) |
| GPU-Länge (Max.) | 450 mm |
| Maximale Höhe des CPU-Kühlers | 169 mm |
| Netzteilunterstützung | ATX PS2 (up to 200mm) |
| AIO-Kühlerunterstützung | Top: 240/280/360mm (Optional); Side: 360mm (Optional) |
| Fanpositionen | Top: 3x 120mm / 2x 140mm; Side: 3x 120mm; Rear: 1x 120mm; Power Compartment: 3x 120mm |
| Laufwerksschächte | 2.5" SSD*2 or 3.5" HDD*1+2.5" SSD*1; 2.5" SSD*1 or 3.5" HDD*1 (PSU Compartment) |
| Front I / O Ports | USB3.2 Gen2 Type-C*1 / USB3.0*2 / AUDIO*1+MIC*1 (2 in 1) |
| Erweiterungssteckplätze | 7 |

Figure 11: Visual representation of JONSBO D400 dimensions and key specifications.
8. Garantie und Support
For warranty information, technical support, or further assistance, please refer to the official JONSBO webBesuchen Sie unsere Website oder kontaktieren Sie Ihren Händler. Bewahren Sie Ihren Kaufbeleg als Kaufnachweis für Garantieansprüche auf.
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





