CA250

小黄外观经典款：旋钮调节电压电流与灯珠亮度，隔离输出可单手触碰单极（严禁同时触两极），适合维修台面长时间使用，建议每 2 小时断电休息约 5 分钟以利散热。

Classic yellow bench tester with isolated output — never touch both poles; pause ~5 minutes every two hours for thermal relief.

CA250 yellow LED bead and TV backlight tester

经典款灯珠 / 背光维修

Classic bead / backlight repair

七大特色（说明书）

Seven highlights (manual)

  • 可调输出：旋钮调节输出电压、输出电流
  • 亮度可调：超过导通电压后继续旋转即可调节电流与亮度
  • 高精度电压表：单表头读取灯珠电压
  • 自动适应：自动匹配测试灯珠、灯盘电压
  • 电气隔离更安全：触摸输出一端不电人，但严禁同时触摸正负两端
  • 电路保护：不烧坏灯珠
  • 兼容性广：可接约 100 串不同类型的灯条、灯盘、灯板与 LED 液晶电视
  • Adjustable output: knob sets output voltage and current
  • Brightness control: keep turning past the forward voltage to set current and brightness
  • Precise voltmeter reads the bead voltage
  • Auto matching to bead and panel voltage
  • Electrical isolation: touching one pole is safe; never touch both
  • Circuit protection helps avoid burning beads
  • Broad compatibility: around 100-string class strips, panels, boards and LED TVs
下载中文说明书 (PDF)Chinese manual (PDF) 下载英文说明书 (PDF)English manual (PDF) 使用教程与售后支持Tutorials & support

产品视图

Product views

CA250 tester on a bench showing bead voltage
维修台实拍（显示灯珠电压）
On the bench, reading bead voltage
CA250 angled product view
机身斜视
Angled view
CA250 top view
俯视面板
Top panel

典型应用

Typical uses

  • 灯珠、灯盘导通检测与好坏判定
  • LED 液晶电视背光灯条维修排查
  • 维修台面日常点灯，旋钮调到合适亮度长时间作业
  • 同型号灯条电压对比，快速找出异常那一条
  • Continuity checks on beads and panels
  • LED TV backlight strip troubleshooting
  • Everyday bench lighting at a comfortable brightness
  • Compare strip voltages to spot the faulty one quickly

电气参数（说明书摘录）

Electrical specs (from manual)

型号Model CA250
供电Supply AC 220V / 50Hz
输出电压Output voltage 可调直流 0~230VAdjustable DC 0~230V
输出电流Output current 可调直流 0~25mAAdjustable DC 0~25mA
显示Display 单表头，灯珠电压 VSingle meter, bead voltage in V
隔离Isolation 半隔离Half-isolated
使用范围Scope 全系 LED 灯板、LED 电视背光LED boards and LED TV backlights

使用要点

How it works

  1. 用测试笔输出正负两端触碰灯珠或灯盘两端，即可点亮灯珠，表头显示电压数据
  2. 旋转「调节电压」旋钮调节输出电压大小
  3. 当输出电压大于灯珠导通电压后，继续旋转旋钮即可调节输出电流与亮度
  4. 同一种灯条电压应相同；测试时电压误差超过 3V，该灯条电压可能有问题
  5. 也可与同型号良品灯条对比，通过电压差判断灯条好坏
  1. Touch the probes to the bead or panel terminals to light it; the meter shows the voltage
  2. Turn the voltage knob to set the output level
  3. Once above the forward voltage, keep turning to adjust current and brightness
  4. Strips of the same type should read alike; a gap over 3V suggests a problem
  5. Compare against a known-good strip of the same model to confirm

同系列选型对照（说明书型号对比表）

Model comparison (from manual)

型号Model 输出电压Output V 输出电流Output I 调压方式Voltage control 隔离Isolation 表头Meters 电压精度V accuracy 漏电检测Leakage
CA250 0-250V 0-20mA 旋转调压Knob 半隔离Half 电压V 0.2V 无No
CB250 0-250V 0-20mA 旋转调压Knob 半隔离Half 电压 + 电流V + I 0.01V 有Yes
CF300 0-300V 0-300mA 两档电压Two ranges 双重隔离Double 电压 + 电流V + I 0.2V 无No
CL300 0-320V 0-40mA 否No 全隔离Full 电压V 0.01V 无No
MCX300 0-320V 0-40mA 否No 全隔离Full 电压 + 电流V + I 0.01V 无No
MCT220 0-220V 0-15mA 按键调压Buttons 半隔离Half 电压V 0.1V 无No

CA250 定位是旋钮调压的经典入门款；需要电流表与漏电检测请看 CB250，需要大电流请看 CF300。个别型号供货状态请与销售确认。

CA250 is the classic knob-controlled entry model; see CB250 for a current meter plus leakage detection, or CF300 for high current. Check availability with sales.

使用提醒

Usage notes

  • 长时间使用会有轻微发热，属正常现象，不影响使用质量
  • 电气隔离技术会使内部一个电阻发热，建议每使用两小时后拔掉电源休息 5 分钟
  • 警告：严禁同时触摸输出正负两端
  • Mild warmth during long sessions is normal and does not affect quality
  • The isolation design heats one internal resistor; unplug for 5 minutes every two hours
  • Warning: never touch both output poles at the same time

相关型号

Related models

CB250 CF300 CX300 LED 分类LED category