中文
含义
创维电视检测到背光驱动过流保护（OCP）触发，E14 代码表示 LED 背光灯条回路中的电流超过了驱动板设定的安全上限。背光驱动 IC 持续监控 LED 灯条电流，当检测到电流异常升高（通常因灯条短路或驱动电路参数漂移引起）时立即切断输出以防止灯条烧毁或驱动板损坏。此故障与 E1 相反——E1 为电流过低（开路），E14 为电流过高（短路或过载）。
常见原因
- LED 灯条内部短路——部分灯珠击穿导致等效电阻降低，回路电流升高。
- 背光驱动板上的电流检测电阻（采样电阻）阻值变质或虚焊，导致检测电路误判。
- 驱动板上升压电路的 MOS 管击穿短路，导致灯条直接承受过高的电压和电流。
- 灯条连接线绝缘层破损导致灯条端对地或端对端短路。
- 灯条与灯条之间的并联节点焊锡短路，导致多组灯条电流分配异常。
- 驱动 IC 的 PWM 调光信号异常，占空比失控输出 100% 电流。
自助排查
- 断电后等待 5 分钟让电源板电容放电完毕，重新通电观察是否仍然立即报错。
- 检查灯条连接排线是否有明显破损、烧焦或熔化痕迹——短路通常伴有物理损坏迹象。
- 使用万用表电阻档测量灯条连接器各引脚之间的阻值（正常灯条应有几百欧姆阻值），若阻值接近 0 则表示短路。
- 在断开所有灯条连接的情况下开机，观察是否仍报 E14——若不报错则问题在灯条侧，仍报错则可能在驱动板侧。
- OCP 故障通常涉及高电压大电流电路，拆机检测存在触电风险，建议交由创维售后处理。
English
Meaning
The Skyworth TV has detected a backlight overcurrent protection (OCP) trigger. Code E14 indicates that the current in the LED backlight strip circuit has exceeded the safety limit set by the driver board. The backlight driver IC continuously monitors the LED strip current. When an abnormally high current is detected (typically caused by a short circuit in the strip or driver circuit parameter drift), it immediately cuts the output to prevent strip burnout or driver board damage. This fault is the opposite of E1 — E1 is low current (open circuit), while E14 is high current (short circuit or overload).
Common Causes
- Internal short circuit in the LED strip — some LED beads have broken down, reducing the equivalent resistance and increasing circuit current.
- The current-sense resistor (sampling resistor) on the backlight driver board has changed value or has a cold solder joint, causing the detection circuit to misread.
- The boost circuit MOSFET on the driver board has shorted, subjecting the LED strip to excessive voltage and current.
- The insulation on the strip wiring has been damaged, causing a terminal-to-ground or terminal-to-terminal short.
- Solder bridging at the parallel connection points between strips has caused abnormal current distribution among multiple strips.
- The PWM dimming signal to the driver IC is abnormal, with the duty cycle out of control and outputting 100% current.
Self-Check Steps
- Unplug the TV and wait 5 minutes for the PSU capacitors to fully discharge, then reconnect and observe whether the error triggers immediately.
- Inspect the strip wiring for visible damage, burn marks, or melted insulation — shorts are often accompanied by physical signs of damage.
- Using a multimeter on resistance mode, measure between the pins of the LED strip connectors (a normal strip shows several hundred ohms); a reading near zero indicates a short.
- Disconnect all LED strips and power on — if E14 no longer appears, the issue is on the strip side; if it persists, the driver board is likely at fault.
- OCP faults involve high-voltage, high-current circuits. Opening the TV chassis carries electric shock risk. Contact Skyworth after-sales service.