1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Yosec E-819B Electronic Gun Safe Lock. Please read this manual thoroughly before attempting to install or operate the lock to ensure proper function and safety.
IMPORTANT: PLEASE DO NOT TRY TO INSTALL THIS LOCK IF YOU ARE NOT A PROFESSIONAL SAFE TECHNICIAN OR LOCKSMITH. If you have any questions, please don't hesitate to contact us.
2. Product Overview
The Yosec E-819B is a digital keypad lock designed for various safe applications, including gun safes, depository safes, hotel safes, file cabinets, and pistol safes. It features multiple user code capabilities, a time delay function, and dual control mode for enhanced security.

Figure 1: Front view of the Yosec E-819B Digital Keypad Lock.

Figure 2: The digital keypad and the main lock body components.
3. Package Contents
Please verify that all components are present before installation:
- Digital Keypad Unit
- Lock Body Mechanism
- Mounting Hardware (Bolts, Screws)
- Connecting Cables
- Instruction Manual (this document)

Figure 3: All components of the Yosec E-819B lock, including the keypad, lock body, and connecting wires.
4. Setup and Installation
Installation of this electronic lock requires technical expertise. It is highly recommended that installation be performed by a professional safe technician or locksmith.
4.1. Battery Installation
The lock requires one 9V battery (not included). To install the battery:
- Locate the battery compartment on the digital keypad unit.
- Open the battery cover.
- Connect a new 9V alkaline battery to the battery clip, ensuring correct polarity.
- Place the battery inside the compartment and close the cover securely.

Figure 4: The digital keypad with its battery compartment open, showing the battery clip.
4.2. Initial Assembly and Testing
Before physical installation on a safe, it is advisable to test the lock's basic functionality.
- Connect the digital keypad to the lock body mechanism using the provided cables.
- The factory default master code is 12345678.
- To unlock, input the factory master code (12345678) followed by the '#' key. The lock bolt should retract.

Figure 5: The digital keypad mounted, ready for operation.
5. Operation
This section details how to program and use your Yosec E-819B lock. For a visual guide, please refer to the video below.
Video: How to program digital code and set time delay for the Yosec E-819B lock. This video demonstrates changing master codes, setting user codes, dual control mode, single mode, time delay settings, and deleting user codes.
5.1. Changing the Master Code
It is highly recommended to change the factory default master code immediately after initial setup.
- Press *, then input 888, and then #.
- Input the current master code (factory set 12345678) and then #.
- Input your new 3-8 digit master code.
- Input the new master code once again and press # to confirm.
5.2. Setting Multiple User Codes (Up to 5)
You can set up to 5 different user codes, each 3-8 digits long.
- Press *, then input 333, and then #.
- Input the current master code and then #.
- Input any one number (this is the user's identification number from 1-5) and press #.
- Input the desired user code (3-8 digits).
- Input the user code once again and press # to confirm.
5.3. Dual Control Mode
This mode requires two user codes to unlock, providing double security.
- To activate Dual Control Mode: Press *, then input 158, and then #.
- Input the current master code and then #.
- Input 2 and press # (2 for Dual Control Mode).
- To unlock in Dual Control Mode: Input the first user code, then the second user code, and press # after each.
5.4. Single Mode
This mode allows unlocking with a single user code.
- To activate Single Mode: Press *, then input 158, and then #.
- Input the current master code and then #.
- Input 1 and press # (1 for Single Mode).
- To unlock in Single Mode: Input the user code and press #.
5.5. Time Delay Mode Setting (Only for User Code)
You can set a time delay from 1 to 59 minutes before the lock can be opened after a correct code is entered.
- Press *, then input 159, and then #.
- Input the current master code and then #.
- Input the desired minute of delayed opening (01-59) and press #.
- To unlock in Time Delay Mode: Input the user code and press #. The lock will then enter the delay period. After the delay, the lock can be opened.
5.6. Changing a User Code
- Press *, then input 444, and then #.
- Input the current user code and then #.
- Input the user's identification number (1-5) and press #.
- Input the new 3-8 digit user code.
- Input the new user code once again and press # to confirm.
5.7. Deleting a User Code
You can delete any individual user code.
- Press *, then input 666, and then #.
- Input the current master code and then #.
- Input the user's identification number (1-5) twice and then #. The user code associated with that ID will be deleted.
6. Features
- Up to 5 different user codes can be set from 3-8 digits.
- Any user code can be deleted separately.
- Single user opening mode or manager code + user code opening model for double security.
- Wrong code input 4 times will result in a 5-minute keypad penalty.
- 01-59 minutes time delay can be set.
- This Digital keypad lock fits most gun safes, depository safes, hotel safes, file cabinets, and pistol safes.
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | YOSEC |
| Model Name | E-819B SAFE LOCK |
| Part Number | E-819B |
| Lock Type | Digital Code Safe Lock |
| Material | Plastic, Zinc |
| Color | Black |
| Item Dimensions (L x W x H) | 1.61 x 3.74 x 1.34 inches |
| Item Weight | 15.8 ounces |
| Batteries Required | Yes (1 x 9V battery) |
| Control Method | Remote |

Figure 6: Detailed dimensions of the Yosec E-819B digital keypad and lock body.
8. Troubleshooting
If you encounter issues with your Yosec E-819B lock, please refer to the following common problems and solutions:
- Keypad not responding: Check battery connection and ensure the battery has sufficient power. Replace the 9V battery if necessary.
- Lock not opening after code entry: Verify that the correct code is being entered. Ensure the lock is not in time delay mode or penalty mode (after 4 incorrect entries).
- Lock bolt not retracting fully: Check for any obstructions in the safe door mechanism or if the lock body is properly aligned.
- Forgotten code: If you forget your master code, you may need to reset the lock to factory settings, which typically involves a specific procedure or contacting customer support. Refer to the video for code programming.
For persistent issues, please contact customer support.
9. Warranty and Support
Your Yosec Electronic Gun Safe Lock is covered by a manufacturer's warranty. Please retain your proof of purchase for warranty claims. For technical support, troubleshooting assistance, or warranty inquiries, please contact the seller or manufacturer directly.
Contact information can typically be found on the product packaging or the seller's storefront.





