1. Introduction
This manual provides detailed instructions for the assembly, operation, and maintenance of your Yaheetech 78-inch Convertible Sofa Bed with USB Ports. Please read this manual thoroughly before assembly and use to ensure safe and proper operation. Keep this manual for future reference.
2. Safety Instructions
- Weight Capacity: Do not exceed the maximum weight capacity of 772 lbs (350 kg). Overloading can cause damage or injury.
- Assembly: Ensure all parts are correctly assembled and tightened before use. Periodically check and re-tighten all fasteners.
- Placement: Place the sofa bed on a level, stable surface. Avoid placing it near heat sources or in direct sunlight to prevent material degradation.
- USB Ports: Use only compatible USB devices. Do not attempt to charge devices with higher power requirements than specified (5V 1.0A and 5V 2.1A). Disconnect the power cable when not in use or during cleaning.
- Children: Keep small children away from moving parts during conversion.
- Cleaning: Refer to the "Maintenance and Care" section for proper cleaning instructions. Avoid harsh chemicals.
- Moving: When moving the sofa bed, lift it rather than dragging to prevent damage to the legs and floor.
3. Package Contents
Before beginning assembly, verify that all components listed below are present and undamaged. Some parts may be stored in the zippered compartment underneath the futon.
- Sofa Bed Frame (Main Unit)
- Armrests (2)
- Solid Wood Legs (6)
- Casters/Wheels (4)
- Pillows (2)
- Hardware Pack (screws, Allen wrench)
- Instruction Manual (this document)
Image: Illustration of all components included in the package, laid out for inspection.
4. Assembly Instructions
Assembly is required. It is recommended to have two people for assembly.
- Unpack Components: Carefully remove all items from the packaging. Check the zippered compartment underneath the futon for legs and armrests.
- Attach Legs: Turn the main sofa bed unit upside down. Screw the six solid wood legs into the designated threaded holes on the bottom of the frame. Ensure they are tightened securely.
- Attach Casters: Secure the four casters (wheels) to the pull-out section of the sofa bed using the provided screws and Allen wrench. These casters facilitate easy conversion.
- Attach Armrests: Slide the armrests onto the metal brackets on each side of the main sofa bed unit until they click into place. Ensure they are firmly attached.
- Upright Position: Carefully turn the assembled sofa bed upright.
- Final Check: Verify that all connections are secure and the sofa bed is stable before use.
Video: Assembly and conversion demonstration of the Yaheetech Convertible Sofa Bed. This video shows how to attach the legs and armrests, and how to convert the sofa into a bed.
Image: Close-up of the underside of the sofa bed, highlighting the attachment points for the legs and casters.
Image: View of the zippered compartment underneath the futon where armrests and legs are stored for shipping.
5. Operating Instructions
5.1 Converting from Sofa to Bed
- Adjust Backrest: The sofa features a click-clack mechanism. Push the backrest forward until you hear a click, then gently lower it to the desired angle. There are three positions: upright (105°), reclined (140°), and flat (180°).
- Extend Footrest: Pull the hidden footrest section from underneath the main sofa unit. It will slide out smoothly on its casters.
- Full Bed Position: For a full bed, lower the backrest completely flat (180°) and extend the footrest.
Image: The sofa bed shown in its three adjustable positions: upright (105°), reclined (140°), and fully flat (180°).
Image: Detailed dimensions of the sofa bed in both its sofa and fully extended bed configurations.
5.2 Using USB Charging Ports
The sofa bed is equipped with two USB charging ports (5V 1.0A and 5V 2.1A) located on the side armrest for convenient device charging.
- Connect Power: Ensure the sofa bed's power cable (located under the armrest) is connected to an electrical outlet.
- Plug in Device: Insert your device's USB charging cable into the appropriate USB port on the sofa armrest.
- Storage Pocket: Utilize the integrated storage pocket next to the USB ports to hold your phone, tablet, or other small items while charging.
Image: A close-up view of the two USB charging ports and the adjacent storage pocket on the sofa's armrest, with a phone charging.
6. Maintenance and Care
- Cleaning Fabric: For general cleaning, use a soft brush or vacuum cleaner with an upholstery attachment to remove dust and debris. For spills, blot immediately with a clean, dry cloth. For stubborn stains, use a mild fabric cleaner and follow the product instructions. Test on an inconspicuous area first.
- Frame and Legs: Wipe the wooden legs and metal frame components with a damp cloth. Avoid abrasive cleaners.
- USB Ports: Keep USB ports free of dust and debris. Do not insert foreign objects into the ports.
- Regular Checks: Periodically inspect all fasteners and connections to ensure they remain tight. Re-tighten as necessary.
- Sunlight Exposure: Prolonged exposure to direct sunlight can cause fading. Position the sofa bed away from direct sunlight or use curtains/blinds.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Sofa bed feels unstable or wobbly. | Loose legs or frame connections. | Check and tighten all screws and bolts, especially on the legs and armrests. Ensure the sofa is on a level surface. |
| Difficulty converting between positions. | Mechanism not engaged correctly; obstruction. | Ensure no objects are obstructing the mechanism. Apply gentle, even pressure when adjusting the backrest. Check that the footrest casters are moving freely. |
| USB ports not charging devices. | Power cable disconnected; faulty device cable; incompatible device. | Verify the sofa bed's power cable is securely plugged into a working electrical outlet. Try a different USB cable or device to rule out cable/device issues. Ensure your device is compatible with 5V USB charging. |
| Squeaking noises during use. | Loose connections; friction between parts. | Tighten all fasteners. If noises persist, apply a small amount of silicone lubricant to moving metal parts (avoiding fabric). |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Yaheetech |
| Model | 78-inch Convertible Sofa Bed |
| Color | Black |
| Material | Linen Fabric, Foam, Solid Wood, Engineered Wood |
| Max. Weight Capacity | 772 lbs (350 kg) |
| Overall Dimensions (Sofa) | 78" L x 37" W x 33" H (at 105° upright) |
| Overall Dimensions (Bed) | 78" L x 44" W x 25.5" H (at 180° flat) |
| Seat Depth | 20.9 inches |
| Seat Height | 15.9 inches |
| USB Ports | 5V 1.0A, 5V 2.1A |
| Assembly Required | Yes |
9. Warranty and Support
This product comes with a limited warranty from Yaheetech. For specific warranty details, please refer to the warranty card included in your package or contact Yaheetech customer support.
Customer Support:
- For assistance with assembly, missing parts, or product issues, please contact Yaheetech customer service.
- Have your model number (B08LKFKNN1) and purchase date ready when contacting support.
Note: Be sure to check all packing materials carefully for some parts are kept in the zip compartment underneath the futon.





