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摘要: 首先检查视放电路,R、G、B三阴极电压接近200V,说明故障为视放管截止引起无光栅。向前检查TDA3504三基色R、G、B输出电压为1V,严重偏离正常值。仔细检查各脚电压,发现21脚为3V,而正常值为1.3V。该脚为沙堡脉冲输入脚,查找沙堡脉冲相关电路,发现沙堡脉冲取样电容1500pF/2kV开路损坏,将其更换后故障排除。
型号 | 厂商 | 价格 |
---|---|---|
EPCOS | 爱普科斯 | / |
STM32F103RCT6 | ST | ¥461.23 |
STM32F103C8T6 | ST | ¥84 |
STM32F103VET6 | ST | ¥426.57 |
STM32F103RET6 | ST | ¥780.82 |
STM8S003F3P6 | ST | ¥10.62 |
STM32F103VCT6 | ST | ¥275.84 |
STM32F103CBT6 | ST | ¥130.66 |
STM32F030C8T6 | ST | ¥18.11 |
N76E003AT20 | NUVOTON | ¥9.67 |
型号/产品名 | 平均报价 | 涨跌幅 |
---|---|---|
STM8S003F3P6 | 1.55 | 1.12% |
74HC573D | 0.64 | 2.86% |
2N7002 | 3.66 | 400.00% |
STM32F103C8T6 | 7.47 | 27.87% |
1N4007 | 1.58 | 0.00% |
ADM2483BRWZ | 8.90 | 3.21% |
SHT10 | 16.21 | 5.88% |
STM32F103RCT6 | 12.56 | 24.44% |
78L05 | 10.55 | 66.67% |
LM358 | 118206.75 | 16.67% |
STM8S003F3P6TR 2500 件
STM8S003F3P6TR 2500 件
STM8S003F3P6TR 2500 件
STM8S003F3P6TR 2500 件
LT1962EMS8#TRPBF 100 件