Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Aiphone JK-1MD Master Monitor Station. The JK-1MD is a key component of the Aiphone JK Series, designed for reliable security and communication within your premises. Please read this manual thoroughly before using the device to ensure proper functionality and safety.
Product Overview

Figure 1: Aiphone JK-1MD Master Monitor Station. This image displays the front panel of the monitor station, highlighting its 3-1/2 direct-view TFT color LCD screen and the various control buttons for call, zoom/wide, adjust, monitor, talk, and off functions.
The Aiphone JK-1MD Master Monitor Station features a 3-1/2 direct-view TFT color LCD for clear video monitoring. It supports both automatic (hands-free) and manual (push-to-talk/release-to-listen) communication modes. The unit also includes door release capabilities and night viewing functionality with white LED projection.
Setup and Installation
Power Source
The JK-1MD requires an 18VDC power source. Use the PS-1820UL power supply unit for proper operation.
Dimensions
The physical dimensions of the unit are approximately 7-5/16" (H) x 5-5/16" (W) x 1-1/16" (D) (185 x 135 x 27 mm).
Wiring
- Door to Master: Use 2-conductor, mid-capacitance, solid, non-shielded wire.
- Master to Sub: Use 4-conductor, mid-capacitance, solid, non-shielded wire.
Recommended Wire Types
- Master to Door: Aiphone #871802
- Between Masters/Sub: Aiphone #871804
Wiring Distances
- Door to Farthest Master/Sub Master:
- 165 feet (22AWG)
- 330 feet (18AWG)
- Master to IER-2:
- 245 feet (22AWG)
- 490 feet (18AWG)
Operating Instructions
Communication Modes
- Automatic (Hands-free): To activate, momentarily push the TALK button.
- Manual (Push-to-talk/Release-to-listen): To activate, push the TALK button for 1 second or until the talk LED illuminates.
Door Release
The door release contact rating is 24V AC/DC, 500mA. For larger contact ratings, use the RY-18L.
Night Viewing
The unit provides night viewing capabilities up to 1-5/8" from the camera, utilizing a white LED projection. Note that the background beyond 1-5/8" may not be visible.
Maintenance
To ensure optimal performance and longevity of your Aiphone JK-1MD Master Monitor Station, follow these general maintenance guidelines:
- Keep the unit clean by wiping it with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Ensure all wiring connections remain secure and free from damage.
- Protect the unit from extreme temperatures and direct moisture.
- Regularly check the camera lens for any obstructions or dirt that might impair night viewing or image clarity.
Troubleshooting
If you encounter issues with your Aiphone JK-1MD Master Monitor Station, consider the following basic troubleshooting steps:
- No Power: Verify that the PS-1820UL power supply is correctly connected and receiving power. Check all power connections.
- No Video/Poor Image: Ensure the camera lens is clean and unobstructed. Check wiring connections between the door station and the master monitor.
- No Audio/Poor Audio: Confirm that the TALK button is being used correctly for the desired communication mode. Check audio wiring connections.
- Door Release Not Functioning: Verify the wiring to the door release mechanism and ensure the RY-18L (if used) is properly installed and functioning. Check the contact rating.
For persistent issues, refer to the detailed troubleshooting section in the full product manual or contact Aiphone customer support.
Specifications
| Feature | Detail |
|---|---|
| Model | JK-1DM |
| Dimensions (HxWxD) | 7-5/16" x 5-5/16" x 1-1/16" (185 x 135 x 27 mm) |
| Power Source | 18VDC (Use PS-1820UL) |
| Video Monitor | 3-1/2" direct-view TFT color LCD |
| Communication | Automatic (hands-free) / Manual (push-to-talk/release-to-listen) |
| Door Release Contact Rating | 24V AC/DC, 500mA (Use RY-18L for larger rating) |
| Night Viewing | Up to 1-5/8" from camera with white LED projection |
| Operating Temperature | 32°F ~ 104°F (0°C ~ 40°C) |
| Weight | 2.0000 lbs |
Warranty and Support
The Aiphone JK-1MD Master Monitor Station comes with a 1 Year Warranty from the date of purchase. For warranty claims, technical support, or service inquiries, please contact Aiphone customer service or visit their official website. Keep your proof of purchase for warranty validation.
For additional resources and detailed product information, please visit the official Aiphone website: www.aiphone.com





