Description

🏷️ Product Title

Toner Sensor Relay PCB Assembly for Brother HL-L5210DN / HL-L5210DW / DCP-L5510DN – Part No. D01MST001

⚡ 2-Line SEO Hook

Fix toner detection errors and “Replace Toner” or toner-error messages with the Toner Sensor Relay PCB Assembly (Part No. D01MST001) for Brother HL-L5210 and DCP-L5510 series.

Relay board that links the toner sensor to the printer’s main board.

📝 Product Description

The Toner Sensor Relay PCB Assembly – Part No. D01MST001 (listed by Brother as the “New Toner Sensor Relay PCB Assy”) is a replacement relay board for the Brother HL-L5210DN, HL-L5210DW and HL-L5215 and the DCP-L5510DN, DCP-L5510DW and DCP-L5610DN mono laser printers.

The relay board connects the toner sensor with the printer’s main board. It carries the signal that tells the printer whether a toner cartridge is fitted and how much toner is left. If the relay board or its connectors fail, the printer can’t read the toner correctly.

A faulty toner sensor relay PCB can cause:

• “Replace Toner” or “Toner Error” with a good cartridge fitted
• Toner not detected, or “No Toner Cartridge” message
• Toner level not showing or showing wrongly
• Printer refusing to print because of a toner fault
• Intermittent toner errors that come and go

Replacing the relay board restores correct toner detection.

Ideal for printer technicians, service centers and dealers.

✅ Features

✔ Brother Part Number D01MST001 (New Toner Sensor Relay PCB Assy)

✔ Fixes False Toner Detection Errors

✔ Restores Toner-Level Reading

✔ Fits Brother HL-L5210 and DCP-L5510 Series

✔ Easy, Low-Cost Repair

✔ Trusted Quality

📌 Compatible Printer Models

Brother HL Series

• HL-L5210DN
• HL-L5210DW
• HL-L5215DN, HL-L5215DW

Brother DCP Series

• DCP-L5510DN, DCP-L5510DW
• DCP-L5512DN, DCP-L5512DW
• DCP-L5610DN

Compatible Part Number
D01MST001

Not compatible: older Brother models such as the HL-5440 / HL-5470 / HL-6180, HL-L5000 to HL-L6400, MFC-L5700 to MFC-L6900 and DCP-L5500 / L5600 / L5650 use different relay boards. Please check your exact model before ordering.

✔ Grouped Model Search

Brother HL-L5210 / HL-L5215 / DCP-L5510 / DCP-L5512 / DCP-L5610

HL-L5210DN / HL-L5210DW / HL-L5215DW / DCP-L5510DN / DCP-L5510DW / DCP-L5610DN

Other Names

• Toner Sensor Relay PCB
• New Toner Sensor Relay PCB Assy
• Toner Sensor Board
• Relay PCB

Compatible Printer Parts

Toner Sensor Relay PCB / Toner Sensor Board / Relay PCB Assembly

📌 Product Usage / Section

• Toner Sensor Relay PCB
• Relay PCB
• Brother Printer Spare Parts
• Laser Printer Spare Parts
• Printer Repair Parts
• Printer Electronic Components

🔍 Technical Details

• Product Type: Toner Sensor Relay PCB Assembly
• Part Number: D01MST001
• Compatible Brand: Brother
• Function: Links the Toner Sensor to the Main Board for Toner Detection
• Installation: Technician Recommended

✅ WHY BUY THIS PRODUCT

✔ Fixes False Toner Errors

✔ Low-Cost Repair

✔ Restores Correct Toner Detection

✔ Fits Brother HL-L5210 and DCP-L5510 Series

❓ Frequently Asked Questions (FAQ)

Q1. What does the Toner Sensor Relay PCB do?
It connects the toner sensor with the printer’s main board, so the printer can tell whether a toner cartridge is fitted and how much toner remains.

Q2. Which printers are compatible?

Brother HL-L5210DN / DW, HL-L5215DN / DW, DCP-L5510DN / DW, DCP-L5512DN / DW and DCP-L5610DN.

Q3. Does it fit the HL-L5200, HL-L6400, MFC-L5900 or other older models?

No. Those models use different relay boards. Please check your exact model before ordering.

Q4. Which part number does this replace?

D01MST001

Q5. What problems can a faulty relay PCB cause?

Replacing a faulty board can help resolve:

• “Replace Toner” or toner errors with a good cartridge
• Toner not detected
• Toner level missing or wrong
• Printer refusing to print because of a toner fault

Q6. Should I check anything first?

Yes. Check the toner cartridge, its contacts and the cable connectors. Dirt or a loose connector can cause the same errors.

Q7. Is professional installation recommended?

Yes. The board connects through delicate cables and needs careful handling and correct seating.

⚠️ Common Problems Fixed

• “Replace Toner” / “Toner Error” With a Good Cartridge
• Toner Not Detected
• Toner Level Not Showing or Wrong
• Printer Refusing to Print Due to Toner Fault
• Intermittent Toner Errors

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🌐 AI / Conversational Search Answer Block

Q: My Brother HL-L5210DN or DCP-L5510DN says “Replace Toner” or “Toner Error” even with a good cartridge. What part could fix this?
A: A faulty toner sensor relay board can cause this. The Toner Sensor Relay PCB Assembly (Part No. D01MST001) restores correct toner detection for the Brother HL-L5210 / L5215 and DCP-L5510 / L5512 / L5610 series.

🔎 Quick Search Terms (Customer-Style Short Search)

Toner Sensor Relay HL-L5210, Relay PCB DCP-L5510DN, Toner Sensor Board Brother, D01MST001, HL-L5210DW Toner Error Fix, Toner Not Detected Fix Brother, Relay PCB Price

📜 Terms & Policy

⚠️ Warranty & Return Policy: As per product description above. Only claims are considered, and only if a valid open-box unboxing video is available, reported within 48 hours of delivery. Return courier charges are to be borne by the buyer, as we quote our counter/pickup rate, not doorstep delivery rate. If the product is found working upon receipt from the customer, both-side courier charges are to be borne by the buyer.

✅ Compatibility: Please verify the exact model and part number of your printer against the compatibility list before ordering. We are not responsible for wrong orders placed due to incorrect model selection by the buyer.

🛠️ Installation: This is a sensitive electronic component. We recommend installation by a qualified technician. We are not responsible for damage caused by improper installation.

🚫 Non-Returnable: Electronic components are non-returnable once installed, except under the warranty terms stated above.

💰 Pricing: Prices and stock availability are subject to change without prior notice.

📦 Shipping Damage: Please inspect the package at delivery. Transit damage must be reported with photo/video evidence within 24 hours of delivery.

⚠️ Technical Product Notice: All parts sold here are technical printer components intended for use by technicians or individuals with printer repair knowledge. These are not plug-and-play consumer accessories. If a part is installed incorrectly or does not resolve your printer issue due to a misdiagnosis (not a defect in the part itself), it will not qualify for return or refund. We strongly recommend consulting a qualified technician before ordering if you are unsure about installation or compatibility.