---
product_id: 103195973
title: "Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Used in All LED Lights Repair Output 0-330V"
brand: "sid led"
price: "430 Lei"
currency: RON
in_stock: true
reviews_count: 8
url: https://www.desertcart.ro/products/103195973-multipurpose-tester-for-led-tv-backlight-and-constant-current-driver
store_origin: RO
region: Romania
---

# 0-330V Output 20-150mA Current Universal Compatibility Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Used in All LED Lights Repair Output 0-330V

**Brand:** sid led
**Price:** 430 Lei
**Availability:** ✅ In Stock

## Summary

> 🔧 Illuminate Your Repairs with Confidence!

## Quick Answers

- **What is this?** Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Used in All LED Lights Repair Output 0-330V by sid led
- **How much does it cost?** 430 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/103195973-multipurpose-tester-for-led-tv-backlight-and-constant-current-driver)

## Best For

- sid led enthusiasts

## Why This Product

- Trusted sid led brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe Operation:** No burn-out risk with wrong polarity settings for single LEDs.
- • **Precision Testing:** Real-time voltage and current monitoring for accurate diagnostics.
- • **Broad Compatibility:** Works seamlessly with all LED types, high or low voltage.
- • **User-Friendly Design:** Manual adjustments for voltage (20-330V) and current (20-150mA).
- • **Versatile Applications:** Ideal for LED strips, panels, and even vehicle lighting.

## Overview

The Multipurpose Tester is an essential tool for professionals in the LED repair industry, offering real-time voltage and current testing for a wide range of LED components, ensuring safe and efficient diagnostics.

## 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:** Black, Red
- **Upper Temperature Rating:** 40 Degrees Celsius

## Images

![Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Used in All LED Lights Repair Output 0-330V - Image 1](https://m.media-amazon.com/images/I/61VSfBEgE3L.jpg)

## Questions & Answers

**Q: will this work on my 70 inch flat screen 110-240v-50/60 Hz, 220w usb, Dc 5v- 500mA?**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ It worked for my TV
*by P***G on March 9, 2025*

I bought this to test and repair a LG led tv. It worked great for testing the existing led's. I also used this to test some single led's from a grow light. Found the bad 1 quickly and replaced it.

### ⭐⭐⭐⭐⭐ Great little tool
*by N***7 on May 15, 2025*

I got involved in lots of LED lighting installation around my house. This tool is absolutely essential to check the strips, connectors, etc. Hard to beat the price, too, value for the buck is very high

### ⭐⭐⭐⭐⭐ Very useful
*by F***Y on July 3, 2024*

It's very simple to use, solve me a lot, now I can check led strings an also verifies tv's led strip

## Frequently Bought Together

- SID LED Multipurpose Tester for LED TV Backlight and Constant Current Driver Board Used in All LED Lights Repair Output 0-330V
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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-26*