Zhono First to Address Firmware Upgrade Issues for Kyocera TK-3400 Series

Background

Kyocera released new firmware for the TK-3400 monochrome printer series on September 11, 2026 (website firmware: V05.05.0010; printer firmware: COT_S000.005.307). The update caused printers using compatible chips to display “Non-genuine Toner” (see Figure 1).

Figure 1: “Non-genuine Toner” Message

Zhono Solution

Zhono was the first to successfully manage the impact of the new firmware. The upgraded chips are now available for shipment.

Figure 2: Zhono Compatible Chips Verified on the Printer

The firmware update affects the following Kyocera models:

Kyocera Ecosys PA4500x/MA4500x/MA4500fx/MA4500ifx/MA4500ix/PA5000x/PA5500x/MA5500ifx/PA6000x/MA6000ifx.

Please contact your sales representative for upgraded chip replacement.

Note: The Kyocera TK-5370/TK-5380 color printer series remains unaffected by this firmware update.

Figure 3: Firmware Versions

Product Information

As a professional printing chip supplier, we are committed to delivering secure and reliable chip solutions while keeping our customers informed with the latest firmware verification updates.

Figure 4: Verified Zhono Compatible Chips for the Kyocera TK-3400 Series

Moving forward, we will continue to closely monitor OEM firmware upgrades, improve response times, and elevate our product and service quality for our customers.

All images in this article are for reference only; actual products may vary. All brand names and trademarks not owned by our company are the property of their respective owners and are used for reference purposes only.

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For more information, please contact us at info@zhono.com.