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1.故障现象:无光、有声。故障部位:RV706(2.2MΩ)电位器开路。 2.故障现象:光栅暗,有图声。故障部位:RV706(2.2MΩ)电位器变值,D_(304)(1SS119)亮度保护二极管反向阻值变小。 3.故障现象:有回扫线,伴音正常。故障部位:R_(772)(680kΩ/1/2W)电阻开路。 4.故障现象:行不同步。故障部位:RV501(5kΩ)电位器变值、C_(509)(1μF/50V)电解电容漏电。 5.故障现象:水平一条亮线。故障部位:D_(855)(RGP10G)+23V整流二极管
1. Symptom: no light, sound. Fault location: RV706 (2.2MΩ) potentiometer open circuit. 2. Symptoms: dark grating, a sound map. Fault location: RV706 (2.2MΩ) potentiometer variable, D_ (304) (1SS119) brightness protection diode reverse resistance becomes smaller. 3. Symptoms: a return line, sound normal. Fault location: R_ (772) (680kΩ / 1 / 2W) resistance open. 4. Symptom: line is not synchronized. Fault location: RV501 (5kΩ) potentiometer variable value, C_ (509) (1μF / 50V) electrolytic capacitor leakage. 5. Symptom: a bright line. Fault location: D_ (855) (RGP10G) +23 V rectifier diode