1. Introdução
This manual provides detailed instructions for the setup, operation, and maintenance of your Prechen 12.3-inch Portable Monitor, Model HD-123. Please read this manual thoroughly before using the product to ensure proper functionality and to prevent damage. Keep this manual for future reference.
2. Produto acabadoview
The Prechen HD-123 is a 12.3-inch IPS stretched bar display designed for use as a secondary monitor. It features a 1920x720 resolution, 300 nits brightness, 1200:1 contrast ratio, and 178° wide viewing angles. It includes built-in speakers and supports both USB-C and HDMI connectivity.
Portas e controles

Imagem: Close-up view of the monitor's side, highlighting the 3.5mm headphone jack, power button, menu button, return button, and shortcut keys for brightness and volume. Two USB-C ports and one HDMI port are also visible.
- Portas USB-C (x2): One port supports both video transmission and power delivery (full-featured USB 3.1). The other is for power only.
- Porta HDMI: Para entrada de vídeo.
- Tomada de fone de ouvido de 3.5 mm: Para saída de áudio.
- Botão de energia: Liga/desliga o monitor.
- Botão de menu: Acessa o menu de exibição na tela (OSD).
- Botão de retorno: Navigates back in the OSD menu.
- Teclas de atalho: Adjust brightness and volume directly.
3. Configuração
Conectando o monitor
The monitor supports two primary connection methods: USB-C (single cable) and HDMI (with separate power).

Image: Illustration demonstrating how to connect the monitor using a single USB-C cable for both video and power, and an alternative method using an HDMI cable for video and a USB-A to USB-C cable for power.
- Conexão USB-C (cabo único):
- Ensure your device (laptop, smartphone, etc.) has a full-featured USB-C port that supports DisplayPort Alternate Mode and power delivery.
- Connect one end of the provided USB-C to USB-C cable to your device's USB-C port.
- Connect the other end of the USB-C to USB-C cable to the monitor's full-featured USB-C port. The monitor should automatically receive video signal and power.
- HDMI Connection (with separate power):
- Connect one end of an HDMI cable to your device's HDMI output.
- Connect the other end of the HDMI cable to the monitor's HDMI port.
- Connect the provided USB-A to USB-C power cable to a power source (e.g., wall adapter, laptop USB-A port) and the monitor's power-only USB-C port.
Montagem VESA
The monitor supports 75x75mm VESA mounting for flexible positioning.

Imagem: A parte traseira view of the monitor, indicating the 75x75mm VESA mounting pattern. A separate stand is shown next to it, demonstrating alternative placement options.
- Locate the four screw holes on the back of the monitor.
- Attach the monitor to a compatible 75x75mm VESA mount or arm using appropriate screws (not included).
4. Instruções de operação
Ligar/Desligar
- Press the Power Button to turn the monitor on.
- Press and hold the Power Button for 3 seconds to turn the monitor off.
Menu de exibição na tela (OSD)
Press the Menu Button to access the OSD menu. Use the shortcut keys (brightness/volume) to navigate and adjust settings. Press the Return Button to exit a submenu or the OSD menu.
- Brilho contraste: Ajuste os níveis de luminância e contraste da tela.
- Configurações de cores: Modifique a temperatura da cor, a tonalidade e a saturação.
- Fonte de entrada: Manually select between USB-C and HDMI inputs if auto-detection fails.
- Configurações de áudio: Adjust volume for the built-in speakers or connected headphones.
- Proporção da tela: Change the display aspect ratio if needed.
Modos de exibição
Quando conectado a um computador, você pode configurar o modo de exibição através das configurações de vídeo do seu sistema operacional:
- Modo duplicado: The monitor mirrors the content of your primary display.
- Modo de extensão: The monitor acts as an extension of your primary display, providing additional screen space.
- Apenas a segunda tela: Only the portable monitor displays content.
5. Manutenção
- Limpando a tela: Use um pano macio e sem fiapos levementeampLimpe com água ou um produto de limpeza para telas. Não borrife o produto de limpeza diretamente na tela.
- Limpando o Casing: Limpe o monitor casinLimpe com um pano macio e seco. Evite produtos de limpeza abrasivos.
- Armazenar: Quando não estiver em uso por longos períodos, guarde o monitor em local fresco e seco, longe da luz solar direta e de temperaturas extremas.
- Manuseio: Handle the monitor with care to avoid dropping or impacting the screen.
6. Solução De Problemas
- Sem Sinal:
- Certifique-se de que todos os cabos estejam conectados com segurança.
- Verify that your device's USB-C port supports video output (DisplayPort Alt Mode) if using a single USB-C cable.
- If using HDMI, ensure the monitor is receiving power via the separate USB-C power cable.
- Tente selecionar a fonte de entrada manualmente através do menu OSD.
- Sem energia:
- Check the power cable connection and the power source.
- Ensure the power adapter (if used) is functioning correctly.
- Tela piscando:
- Verifique se as conexões dos cabos estão soltas.
- Experimente um cabo ou porta diferente.
- Ensure your device's graphics drivers are up to date.
- Sem som:
- Adjust the volume through the monitor's OSD menu and your connected device.
- Ensure the audio output is directed to the monitor in your device's sound settings.
7. Especificações

Image: Visual representation of the monitor's key features: 12.3-inch screen, 85% NTSC color gamut, Plug and Play functionality, 300 cd/m² brightness, 1920x720p resolution, 8-bit color, and 16.7M display colors.
| Recurso | Especificação |
|---|---|
| Número do modelo | HD-123 |
| Tamanho da tela | 12.3 polegadas |
| Tipo de painel | LCD IPS |
| Resolução | 1920 x 720 pixels |
| Brilho | 300 cd/m² (nits) |
| Taxa de contraste | 1200:1 |
| Viewângulo de engate | 178° |
| Gama de cores | 85% NTSC |
| Profundidade de cor | 8 bits (16.7 milhões de cores) |
| Conectividade | 2x USB-C (1 full-featured, 1 power-only), 1x HDMI |
| Áudio | Built-in Speakers, 3.5mm Headphone Jack |
| Montagem | 75x75mm VESA Compatible |
| Material | Metal |
| Dimensões do produto | 0.59 x 11.8 x 5.1 polegadas |
| Peso do item | 2.14 libras |
8. Informações de garantia
Prechen products are covered by a limited warranty against defects in materials and workmanship. The specific warranty period may vary by region and retailer. Please retain your proof of purchase for warranty claims. For detailed warranty terms and conditions, refer to the warranty card included with your product or contact customer support.
9. Suporte
If you encounter any issues or have questions regarding your Prechen 12.3-inch Portable Monitor, please contact our customer support team. Provide your product model number (HD-123) and a detailed description of the issue for faster assistance.
- Suporte online: Visit the official Prechen webSite com perguntas frequentes e recursos de suporte.
- Suporte por e-mail: Consulte a embalagem do produto ou o certificado de garantia para obter o e-mail de contato.