> For the complete documentation index, see [llms.txt](https://cookiebunker.gitbook.io/cookiebunker/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cookiebunker.gitbook.io/cookiebunker/dma/4k-dc500-fuser/cables-and-controls.md).

# Cables & Controls

## **Correct Cable Layout**

### **HDMI Setup**

* **Main PC GPU → HDMI RX0**
* **Secondary PC GPU → HDMI RX1**
* **Monitor → HDMI TX**

<figure><img src="/files/hbkRA0HWUiAUXq4e5Hu2" alt=""><figcaption></figcaption></figure>

### **DisplayPort Setup**

* **Main PC GPU → DP RX0**
* **Secondary PC GPU → DP RX1**
* **Monitor → DP TX**
*

```
<figure><img src="/files/VXogvF55QBemhyhtqYb9" alt=""><figcaption></figcaption></figure>
```

{% hint style="info" %}
RX0 and RX1 can be swapped by holding **K4** for 3–5 seconds.
{% endhint %}

***

### **Power & Ports**

* **DC12V** → Main power
* **12V 3A (optional)** → Backup power
* **USB-C** → Debug / firmware updates (if needed)
*

```
<figure><img src="/files/rEXEqGDHcjKx08k75C3D" alt=""><figcaption></figcaption></figure>
```

***

## **Button Functions (Front Panel)**

#### **K1 – Info**

* Short press: Show resolution, refresh rate, alpha value
* Long press (5s): Switch EDID Mode (A ↔ B)

#### **K2 – Increase Overlay Strength**

* Raises chroma-key (alpha) value

#### **K3 – Decrease / Reset**

* Short press: Lower alpha
* Long press (5s): **Factory reset** (fixes most issues)

#### **K4 – Layer Control**

* Short press: Enable / disable secondary overlay
* Long press (3–5s): Swap upper & lower layers
*

```
<figure><img src="/files/XNLIHak9brFVuajNLGul" alt=""><figcaption></figcaption></figure>
```

***

### ✅ You're Done

{% hint style="success" %}
Your 4K DC500 Fuser is now set up and ready to use.
{% endhint %}

{% hint style="info" %}
If you need further clarification or encounter any issues, please refer to [**Troubleshooting & Indicators**](/cookiebunker/dma/4k-dc500-fuser/troubleshooting-and-indicators.md).
{% endhint %}


---

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