Topstar OP290UCR6AZ
User Manual: Open Point SY Office Chair
Brand: Topstar
Model: OP290UCR6AZ
1. Introduction
Thank you for choosing the Topstar Open Point SY Office Chair. This chair is designed to provide superior comfort and ergonomic support for both home and office environments, suitable for up to 8 hours of daily use. Its modern design, featuring monolithically padded elements and a breathable mesh back, makes it a functional and aesthetically pleasing addition to any workspace.
This manual provides detailed instructions for assembly, operation, maintenance, and troubleshooting to ensure you get the most out of your new office chair.

Figure 1: Topstar Open Point SY Office Chair (Mint)
2. Safety Information
Please read all safety instructions carefully before assembling and using the chair. Keep this manual for future reference.
- Ensure the chair is placed on a stable and level surface to prevent tipping.
- Do not stand on the chair. Use it only for sitting.
- Do not use the chair if any parts are damaged or missing. Contact customer support for replacement parts.
- Keep children and pets away from the assembly area.
- Periodically check all screws and connections to ensure they are tight.
3. Included Components
Before beginning assembly, ensure all the following components are present in the packaging:
- Armrests (2)
- Backrest (1)
- Base (1)
- Safety Double Wheels (5)
- Toplift Gas Spring (1)
- Seat Padding (1)
- Office Swivel Chair Mechanism (pre-attached to seat)

Figure 2: Chair components overview
4. Setup and Assembly
Assembly of the Open Point SY Office Chair is designed to be straightforward. No special tools are required beyond what may be included in the package.
- Attach Wheels to Base: Insert the five safety double wheels into the openings at the end of each leg of the chrome-plated steel base. Push firmly until they click into place.
- Insert Gas Spring: Place the Toplift gas spring into the central hole of the assembled base. Do not remove the red cap from the gas spring until instructed.
- Attach Seat to Gas Spring: Carefully place the seat assembly (with the pre-attached mechanism) onto the Toplift gas spring. Ensure it is centered and stable. The weight of the seat will secure it.
- Attach Armrests: Secure the armrests to the sides of the seat using the provided screws. Ensure they are oriented correctly (left and right).
- Attach Backrest: Connect the backrest to the seat mechanism using the designated attachment points and screws. Ensure it is securely fastened.
- Final Check: Once assembled, sit on the chair to engage the gas spring and ensure all connections are secure. Test all adjustment functions.
5. Operating Instructions
The Open Point SY Office Chair offers several adjustment features to customize your seating experience for optimal comfort and ergonomics.
- Seat Height Adjustment:
To raise the seat, lift the lever located under the right side of the seat while taking your weight off the chair. To lower the seat, lift the same lever while seated.
- Backrest Height and Tilt Adjustment:
The design backrest features a grid mechanism for individual height and tilt adjustment. Locate the adjustment knobs or levers on the backrest support. Adjust to your desired height and angle, then secure.
- Point Synchronous Mechanism:
This mechanism allows the seat and backrest to move synchronously, promoting dynamic sitting. Use the lever on the left side of the seat to activate or lock the mechanism. The spring tension can also be adjusted to match your body weight, typically via a knob under the seat.
- Height-Adjustable Armrests:
Press the button or lift the lever located on the side of each armrest to adjust its height. Release the button/lever at your desired height to lock it in place.

Figure 3: Chair adjustments overview
6. Maintenance
Proper care will extend the life and appearance of your office chair.
- Cleaning: Wipe clean with a damp cloth. For tougher stains, use a mild soap solution and wipe dry immediately. Avoid abrasive cleaners or harsh chemicals, as these can damage the fabric and finish.
- Regular Checks: Periodically inspect all screws and bolts to ensure they are tight. Re-tighten if necessary.
- Caster Care: Keep the wheels clean from hair and debris to ensure smooth rolling.
7. Troubleshooting
If you encounter any issues with your chair, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Chair Sinks or Does Not Hold Height | Faulty gas spring or improper installation. | Ensure the gas spring is fully seated. If the issue persists, the gas spring may need replacement. Contact customer support. |
| Chair is Wobbly/Unstable | Loose screws or uneven floor. | Check and tighten all assembly screws. Ensure the chair is on a flat surface. |
| Difficulty Rolling | Debris in casters or damaged wheels. | Clean any hair or debris from the wheels. If wheels are damaged, they may need replacement. |
| Squeaking Noises | Loose connections or friction between parts. | Tighten all screws. Apply a small amount of silicone lubricant to moving parts if necessary (avoiding fabric). |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Topstar |
| Model Name | Open Point SY AZ |
| Item Model Number | OP290UCR6AZ |
| Color | Mint |
| Style | Monolithically padded |
| Product Dimensions | 18.9"D x 18.9"W x 46.46"H |
| Item Weight | 39.6 pounds |
| Back Style | Open Back, Breathable Mesh Cover |
| Arm Style | Adjustable height |
| Special Features | Adjustable, Ergonomic, Robust, Rolling, Point Synchronous Mechanism |
| Base Material | Chrome-plated steel |
| Recommended Use | Office (up to 8 hours daily) |
| Assembly Required | Yes |
| Product Care | Wipe Clean |
9. Warranty and Support
The Topstar Open Point SY Office Chair comes with a 3-year manufacturer's warranty, ensuring quality and reliability. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or to order replacement parts, please contact Topstar customer service. You can typically find contact information on the manufacturer's official website or through your point of purchase.
Please have your model number (OP290UCR6AZ) and proof of purchase ready when contacting support.
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