中文
含义
创维电视检测到待机电源电路异常，E17 代码表示 5VSB（5V Standby）待机电压输出不正常。待机电源是电源板上始终工作的辅助供电电路，在电视处于待机状态时为主板上的待机控制电路（MCU）和红外/蓝牙接收器供电。5VSB 异常会导致电视无法正常待机、无法用遥控器开机、开机无响应或自动重启等间歇性故障。
常见原因
- 待机电源 IC（如 VIPer22A、LNK5xxx 系列、TNYxxx 系列）损坏，5VSB 完全无输出。
- 待机电源滤波电容老化鼓包，5VSB 输出电压纹波过大，导致主板 MCU 工作不稳定。
- 待机电源变压器绕组短路或反馈光耦老化，5VSB 输出电压偏高或偏低（超出 4.75V-5.25V 范围）。
- 主板上的待机电路有短路负载，导致 5VSB 被拉低。
- 电源板上的继电器或 MOS 开关管在开机后未切换主电源，电视无法从待机状态唤醒。
- 待机电源的启动电阻阻值变大，导致待机 IC 启动困难（冷机不易开机，热机正常）。
自助排查
- 观察待机指示灯——指示灯完全不亮或非常微弱地闪烁，提示 5VSB 供电异常。
- 尝试用遥控器和电视面板待机键两种方式开机——若均无效，电源待机部分可能性大。
- 断电后等待 2 分钟重新通电——如果能正常开机但一段时间后无法待机唤醒，可能是待机电路热稳定性问题。
- 检查家中供电电压是否正常——电压过低会导致待机电源启动困难。
- 待机电源故障多涉及高压侧电路（整流后的 300V DC），非专业人员不建议自行拆修，请联系创维售后。
English
Meaning
The Skyworth TV has detected a standby power circuit abnormality. Code E17 indicates that the 5VSB (5V Standby) voltage output is abnormal. The standby power supply is an auxiliary circuit on the PSU that operates continuously. When the TV is in standby mode, it powers the standby control MCU on the main board and the IR/Bluetooth receiver. A 5VSB fault can cause the TV to fail to enter standby properly, fail to wake up via remote, become unresponsive to power-on, or exhibit intermittent restart behavior.
Common Causes
- The standby power controller IC (e.g., VIPer22A, LNK5xxx series, TNYxxx series) is damaged, with no 5VSB output at all.
- The standby power filter capacitor has aged and bulged, causing excessive ripple on the 5VSB output and destabilizing the main board MCU.
- The standby power transformer winding has shorted or the feedback optocoupler has aged, causing the 5VSB output to be too high or too low (outside 4.75V-5.25V range).
- A short circuit on the standby power rail on the main board is pulling down the 5VSB voltage.
- The relay or MOSFET switch on the PSU fails to engage the main power supply after power-on, preventing the TV from waking from standby.
- The startup resistor for the standby IC has increased in value, making cold startup difficult (the TV starts OK when warm but fails when cold).
Self-Check Steps
- Observe the standby indicator — if it does not light at all or flickers very dimly, this points to a 5VSB supply issue.
- Try powering on using both the remote control and the TV panel standby button — if neither works, the standby power section is likely at fault.
- Disconnect power for 2 minutes and reconnect — if the TV powers on OK initially but later fails to wake from standby, this may be a thermal stability issue in the standby circuit.
- Check whether the household mains voltage is normal — very low voltage can make standby power startup difficult.
- Standby power faults often involve the high-voltage side (300V DC after rectification). Do not attempt DIY repair without professional experience. Contact Skyworth after-sales service.