Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Us...

Brand: SID LED Sold By: TopSelected
$123.42 In Stock
Ships from United States Arrives in 7-14 business days
Item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
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July2026
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July2026
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Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Us...

Multipurpose Tester for LED TV Backlight and Co...

$123.42

Product Details

Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Used in All LED Lights Repair Output 0-330V


 


   ✓ Free 60 Day Returns               

   ✓ Free Express Shipping          

             

   

Description:

Product model: KT4H Vin: AC 85-265V Vout: DC 0-330V (Automatic + Adjustable) Voltmeter Accuracy: <(± 0.5 ± 1%Vout) V Iout: 0-150mA (Automatic + Adjustable) Constant Current Board Testing Current: 0-999mA Ammeter Accuracy: <(±2 ±1%Iout) mA Pinput: 50VA (MAX) Temperature: -20℃~+40℃ TESTING METHODS Default factory setting: Output Voltage 330V, Output Current 50mA. You can testing the backlight of TV with any size at this default settings. 1. Self-testing: Plug in, turn the power switch on. The voltage is around 330V, current is 0; Contact the probes together, voltage changes to 0 and current changes to around 50mA, then testing can be started. 2. In testing: Voltage = ‘0’, SHORT CIRCUIT. Voltage = ‘330V’, OPEN CIRCUIT. 3. Testing single LED bead (Set voltage around to 20V and the current switch to 1mA): A. With right polarity: the voltage shows on the tester of a normal LED bead is about 80% of the rated voltage, for example, the operating voltage of the LED bead is 2.4V if its rated voltage is 3V; B. With wrong polarity: Voltage display the open circuit voltage. 4. Testing LED strips: Set the voltage to around 200V, change the current if need adjust brightness. Test method of Constant Current Driver Board Testing situation: the LED strip of backlight is on with the tester, but it does not work with the constant current board; A. Cut off the power of TV, unplug the interface sockets of the constant current plate and light bar; B. Connect the constant current board with the tester using the cables in the kits on right polarity. C. Insert the Red and Black pens of the tester into the anode and cathode of the interface of the LED light bar D. Turn the power of TV on. E. Testing voltage >30V, Current >30mA and keep stable, and the LED strip working normal, then the Constant current board is normal.

Features:

  • Real-time testing voltage and current of constant current drive board.
  • Testing LED strips, LED panels, single LED bead, COB lighting sources, backlight of LED TV, displays, computers and so on.
  • Testing voltage parameter of various of electronic components;Testing LED light on vehicle.
  • No burn out when testing single LED bead with wrong polarity. (Set voltage around to 20V and the current switch to 1mA)
  • Compatible with all the LED strips (high voltage or low voltage). Manual adjusting the range of testing voltage (20-330V/DC) and current (20-150mA).

Product Details:

  • Brand: SID LED
  • Power Source: Corded Electric
  • Style: Electronic
  • Color: Red, Black
  • Upper Temperature Rating: 4E+1 Degrees Celsius
  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 9.17 x 6.38 x 1.93 inches; 14.89 ounces
  • Item model number ‏ : ‎ KT4H
  • Date First Available ‏ : ‎ January 14, 2019
  • Manufacturer ‏ : ‎ SID LED
  • Country of Origin ‏ : ‎ China
  • Best Sellers Rank: #198,569 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #339 in Multi Testers
  • #339 in Multi Testers
  • Customer Reviews: 4.7 4.7 out of 5 stars 269 ratings

Shipping Overview: 

Shipping: Standard Domestic Shipping within the United States charges first item USD 6.99 and additional item USD 3.0 each. Standard International Shipping from United Kingdom, Germany, Italian and Japan to the United States charges first item USD 11.99 and additional item USD 4.0 each.

Import Duty: Everymarket collects applicable duties and taxes on goods imported into the U.S. at checkout, it's calculated based on the goods value multiply by the rate. For United Kingdom and China goods is 10%, Germany, Italian and Japan goods is 15%. We are committed to making your U.S. shopping experience simple and transparent. The method of delivery—either Delivered Duty Paid (DDP) or Delivered Duty Unpaid (DDU)—depends on whether duties and taxes are collected at the time of your purchase.

Order Processing: Please allow 1-2 business days for order processing and preparation before shipment. 

Domestic Shipping: Orders within the U.S. are shipped via USPS or FedEx, depending on the origin of the product. Average transit times to the United States is 3 - 7 Business days and average transit times to International is 7 - 14 Business days 

International Shipping: Currently, we only ship within the USA. 

Tracking Information: Every order is trackable. You will receive a tracking number once your order has been shipped. Products may be shipped from various global fulfillment centers.

Shipping Delays: 

Please note that shipping times may vary due to factors beyond our control, such as weather conditions, natural disasters, or peak holiday periods. While we strive to ensure timely delivery, the exact arrival time cannot be guaranteed and is managed by the shipping carrier.

Shipping Options:

  • Standard Delivery: Most orders are shipped within 3-7 business days. Larger items may utilize LTL shipping for safe handling.

  • Handling Time: We handle shipments on business days (Monday - Friday), with a preparation time of 1-2 days.

  • Additional Charges: Some items require additional shipping charges due to their size, weight, or special handling. These charges are specified on the product pages and are not eligible for shipping discounts.

  • Exclusions: Gift cards, packaging, taxes, and prior purchases do not count toward the minimum purchase requirement for free shipping. This offer is valid only for shipments to U.S. addresses, including Puerto Rico.

Delivery Details:

  • Estimates: Standard shipping within the US typically takes 3-7 business days. These are estimates and not guarantees.

  • Shipping Restrictions: We ship to all 50 states, Washington, DC, U.S. territories, and APO/FPO/DPO addresses. Shipping options vary based on the delivery address.

  • Remote Areas: Shipments to remote areas may incur additional charges or require pickup from a nearby shipping partner’s location.

Shipping Confirmation:

You will receive a shipping confirmation email with a tracking number as soon as your order is dispatched. If you do not receive this email immediately, please be assured that your items will arrive within the estimated delivery window provided at checkout.

Order Modifications:

If you need to cancel or modify your order, please contact our customer support immediately.

Issues with Delivery:

If your order shows as delivered but you have not received it, please contact the shipping carrier directly to resolve the issue. For persistent problems, contact our customer service at cs@everymarket.com.

Customer Support:

Our team is available 24/7 to assist you with any questions or concerns regarding your order. We are committed to ensuring a smooth shopping experience.

Return & Refund Policy Overview

Please review our return and refund policies below to ensure a smooth transaction process.

Return Policy

  • Duration: You have 30 days from receiving your item to initiate a return.

  • Condition: Items must be unworn, unwashed, with original tags and packaging intact.

  • Shipping Costs:
    - If your return is approved due to a defective, damaged, or incorrect item, we will provide a prepaid return shipping label at no cost.

    - If the item has no quality issues and matches the product listing and description, please contact our Customer Service team before returning it. Once your return is authorized, you must return the item according to the provided instructions. In this case, the return shipping cost is the customer's responsibility.

    - We are not responsible for return shipping costs for items returned without prior authorization.

  • Packaging: Ensure returned items are well-packaged to avoid damage during transit.

  • Tracking: Use a trackable and insured shipping method as we are not liable for items lost or damaged on return.

  • Initiating a Return: Contact us at cs@everymarket.com to start your return. We will provide a return shipping label and instructions upon approval. Returns without prior approval will not be accepted.

How to Return

  • Method: Returns must be sent back by mail to the address provided in the return instructions.

Return Label

  • Please contact us to get return labels.

Product Conditions for Return

  • Eligible Products: Returns are only accepted for items in new condition.

Nonreturnable Items

Certain items are not eligible for return:

  • Electronic devices after 30 days (e.g., computers, laptops, Kindles)

  • Gift cards, prepaid game cards

  • Perishable goods, live insects, some jewelry, some health and personal care items

  • Customized or personalized products

  • Items with special shipping restrictions

Refund Policy

  • Window: Eligible products may be returned within 30 days of delivery for a refund.

  • Refund Method: Refunds are processed to the original payment method or as store credit for items purchased with gift cards.

  • Processing Time: Refunds are processed within 3-5 business days after we receive the return; please allow additional time for shipping and bank processing.

Claims

Inspect your order upon arrival and report any defects, damages, or incorrect items immediately to allow us to address the issue. For claims, contact our support team with details of the issue.

Exchange Policy

For the quickest service, return your original item and place a new order for the desired product once your return is accepted.

Return Address

EveryMarket Customer Service 2101 E Terra Ln, O'Fallon, MO 63366

Customer Support

Available 24/7 for any questions or assistance needed:

  • Phone: +1 (800) 660-3783

  • Email: cs@everymarket.com

 

Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Used in All LED Lights Repair Output 0-330V


 


   ✓ Free 60 Day Returns               

   ✓ Free Express Shipping          

             

   

Description:

Product model: KT4H Vin: AC 85-265V Vout: DC 0-330V (Automatic + Adjustable) Voltmeter Accuracy: <(± 0.5 ± 1%Vout) V Iout: 0-150mA (Automatic + Adjustable) Constant Current Board Testing Current: 0-999mA Ammeter Accuracy: <(±2 ±1%Iout) mA Pinput: 50VA (MAX) Temperature: -20℃~+40℃ TESTING METHODS Default factory setting: Output Voltage 330V, Output Current 50mA. You can testing the backlight of TV with any size at this default settings. 1. Self-testing: Plug in, turn the power switch on. The voltage is around 330V, current is 0; Contact the probes together, voltage changes to 0 and current changes to around 50mA, then testing can be started. 2. In testing: Voltage = ‘0’, SHORT CIRCUIT. Voltage = ‘330V’, OPEN CIRCUIT. 3. Testing single LED bead (Set voltage around to 20V and the current switch to 1mA): A. With right polarity: the voltage shows on the tester of a normal LED bead is about 80% of the rated voltage, for example, the operating voltage of the LED bead is 2.4V if its rated voltage is 3V; B. With wrong polarity: Voltage display the open circuit voltage. 4. Testing LED strips: Set the voltage to around 200V, change the current if need adjust brightness. Test method of Constant Current Driver Board Testing situation: the LED strip of backlight is on with the tester, but it does not work with the constant current board; A. Cut off the power of TV, unplug the interface sockets of the constant current plate and light bar; B. Connect the constant current board with the tester using the cables in the kits on right polarity. C. Insert the Red and Black pens of the tester into the anode and cathode of the interface of the LED light bar D. Turn the power of TV on. E. Testing voltage >30V, Current >30mA and keep stable, and the LED strip working normal, then the Constant current board is normal.

Features:

  • Real-time testing voltage and current of constant current drive board.
  • Testing LED strips, LED panels, single LED bead, COB lighting sources, backlight of LED TV, displays, computers and so on.
  • Testing voltage parameter of various of electronic components;Testing LED light on vehicle.
  • No burn out when testing single LED bead with wrong polarity. (Set voltage around to 20V and the current switch to 1mA)
  • Compatible with all the LED strips (high voltage or low voltage). Manual adjusting the range of testing voltage (20-330V/DC) and current (20-150mA).

Product Details:

  • Brand: SID LED
  • Power Source: Corded Electric
  • Style: Electronic
  • Color: Red, Black
  • Upper Temperature Rating: 4E+1 Degrees Celsius
  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 9.17 x 6.38 x 1.93 inches; 14.89 ounces
  • Item model number ‏ : ‎ KT4H
  • Date First Available ‏ : ‎ January 14, 2019
  • Manufacturer ‏ : ‎ SID LED
  • Country of Origin ‏ : ‎ China
  • Best Sellers Rank: #198,569 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #339 in Multi Testers
  • #339 in Multi Testers
  • Customer Reviews: 4.7 4.7 out of 5 stars 269 ratings

Shipping Overview: 

Shipping: Standard Domestic Shipping within the United States charges first item USD 6.99 and additional item USD 3.0 each. Standard International Shipping from United Kingdom, Germany, Italian and Japan to the United States charges first item USD 11.99 and additional item USD 4.0 each.

Import Duty: Everymarket collects applicable duties and taxes on goods imported into the U.S. at checkout, it's calculated based on the goods value multiply by the rate. For United Kingdom and China goods is 10%, Germany, Italian and Japan goods is 15%. We are committed to making your U.S. shopping experience simple and transparent. The method of delivery—either Delivered Duty Paid (DDP) or Delivered Duty Unpaid (DDU)—depends on whether duties and taxes are collected at the time of your purchase.

Order Processing: Please allow 1-2 business days for order processing and preparation before shipment. 

Domestic Shipping: Orders within the U.S. are shipped via USPS or FedEx, depending on the origin of the product. Average transit times to the United States is 3 - 7 Business days and average transit times to International is 7 - 14 Business days 

International Shipping: Currently, we only ship within the USA. 

Tracking Information: Every order is trackable. You will receive a tracking number once your order has been shipped. Products may be shipped from various global fulfillment centers.

Shipping Delays: 

Please note that shipping times may vary due to factors beyond our control, such as weather conditions, natural disasters, or peak holiday periods. While we strive to ensure timely delivery, the exact arrival time cannot be guaranteed and is managed by the shipping carrier.

Shipping Options:

  • Standard Delivery: Most orders are shipped within 3-7 business days. Larger items may utilize LTL shipping for safe handling.

  • Handling Time: We handle shipments on business days (Monday - Friday), with a preparation time of 1-2 days.

  • Additional Charges: Some items require additional shipping charges due to their size, weight, or special handling. These charges are specified on the product pages and are not eligible for shipping discounts.

  • Exclusions: Gift cards, packaging, taxes, and prior purchases do not count toward the minimum purchase requirement for free shipping. This offer is valid only for shipments to U.S. addresses, including Puerto Rico.

Delivery Details:

  • Estimates: Standard shipping within the US typically takes 3-7 business days. These are estimates and not guarantees.

  • Shipping Restrictions: We ship to all 50 states, Washington, DC, U.S. territories, and APO/FPO/DPO addresses. Shipping options vary based on the delivery address.

  • Remote Areas: Shipments to remote areas may incur additional charges or require pickup from a nearby shipping partner’s location.

Shipping Confirmation:

You will receive a shipping confirmation email with a tracking number as soon as your order is dispatched. If you do not receive this email immediately, please be assured that your items will arrive within the estimated delivery window provided at checkout.

Order Modifications:

If you need to cancel or modify your order, please contact our customer support immediately.

Issues with Delivery:

If your order shows as delivered but you have not received it, please contact the shipping carrier directly to resolve the issue. For persistent problems, contact our customer service at cs@everymarket.com.

Customer Support:

Our team is available 24/7 to assist you with any questions or concerns regarding your order. We are committed to ensuring a smooth shopping experience.

Return & Refund Policy Overview

Please review our return and refund policies below to ensure a smooth transaction process.

Return Policy

  • Duration: You have 30 days from receiving your item to initiate a return.

  • Condition: Items must be unworn, unwashed, with original tags and packaging intact.

  • Shipping Costs:
    - If your return is approved due to a defective, damaged, or incorrect item, we will provide a prepaid return shipping label at no cost.

    - If the item has no quality issues and matches the product listing and description, please contact our Customer Service team before returning it. Once your return is authorized, you must return the item according to the provided instructions. In this case, the return shipping cost is the customer's responsibility.

    - We are not responsible for return shipping costs for items returned without prior authorization.

  • Packaging: Ensure returned items are well-packaged to avoid damage during transit.

  • Tracking: Use a trackable and insured shipping method as we are not liable for items lost or damaged on return.

  • Initiating a Return: Contact us at cs@everymarket.com to start your return. We will provide a return shipping label and instructions upon approval. Returns without prior approval will not be accepted.

How to Return

  • Method: Returns must be sent back by mail to the address provided in the return instructions.

Return Label

  • Please contact us to get return labels.

Product Conditions for Return

  • Eligible Products: Returns are only accepted for items in new condition.

Nonreturnable Items

Certain items are not eligible for return:

  • Electronic devices after 30 days (e.g., computers, laptops, Kindles)

  • Gift cards, prepaid game cards

  • Perishable goods, live insects, some jewelry, some health and personal care items

  • Customized or personalized products

  • Items with special shipping restrictions

Refund Policy

  • Window: Eligible products may be returned within 30 days of delivery for a refund.

  • Refund Method: Refunds are processed to the original payment method or as store credit for items purchased with gift cards.

  • Processing Time: Refunds are processed within 3-5 business days after we receive the return; please allow additional time for shipping and bank processing.

Claims

Inspect your order upon arrival and report any defects, damages, or incorrect items immediately to allow us to address the issue. For claims, contact our support team with details of the issue.

Exchange Policy

For the quickest service, return your original item and place a new order for the desired product once your return is accepted.

Return Address

EveryMarket Customer Service 2101 E Terra Ln, O'Fallon, MO 63366

Customer Support

Available 24/7 for any questions or assistance needed:

  • Phone: +1 (800) 660-3783

  • Email: cs@everymarket.com

 

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