QSC DCA1222 User Manual page 30

Key • Légende
Zeicherklärung • Leyende
= lit
allumé
aufgeleuchtet
illuminado
= blinking
clignotant
blinkt
parpadeo
= off
éteint
aus
apagado
30
TROUBLESHOOTING
No sound
(continued)
Indication: signal LEDs responding to signal level
• If the green SIGNAL, -20 dB, and -10 dB indicators are lighting normally,
the fault is somewhere between the amp and the speaker. Check the speaker
wiring for breaks. Try another speaker and cable.
INDICATION: CLIP LEDs bright and steady
The amplifi er is in protective muting.
• One second of muting is normal when the amp is turned on or off.
• Overheating will cause protective muting. The fan will be running at full
speed and the chassis will be hot to the touch; sound should resume within
a minute as the amplifi er cools to a safe operating temperature. Check
for proper ventilation. If the fan isn't running at all, the amplifi er requires
servicing.
INDICATION: Clip LED fl ashing
• If the red CLIP indicator fl ashes when signal is applied, the amplifi er output
may be shorted. Check the speaker wiring for stray strands or breaks in the
insulation.
故障排除
没声音
（续）
现象：信号 LED 指示灯对信号水平有反应
• 如果绿色的信号、-20 dB 和 -10 dB 指示灯正常亮起，则可能是
放大器与扬声器之间的某个位置出现故障。请检查扬声器接线
是否断开。用另一个扬声器和线缆试一下。
现象：削波 LED 指示灯发光且稳定
放大器处于保护性静音模式中。
• 打开或关闭放大器时，会出现一秒钟的静音，这是正常现象。
• 过热会导致保护性静音。风扇将全速运行，底盘发烫；声音应
该在放大器冷却到安全工作温度一分钟之内恢复。检查保证正
常通风。如果风扇完全没有运行，则放大器需要维修。
现象：削波 LED 指示灯闪烁
• 如果输入信号时红色削波 指示灯闪烁，可能是放大器输出短
路。检查扬声器导线有无缠绕或绝缘破裂。