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故障现象：开机后，故障显示“Ｅｒｒｏｒ１３”，不能进行曝光。故障分析和维修根据手册错误译码提示，导致Ｅｒｒｏｒ１３错误码的原因可能是灯丝电路故障所致，变压器Ｔ１次级输出３３Ｖ交流电给灯丝电压调整电路，经过调整输出一个恒定的２５Ｖ直流电压，此电压给球管灯丝
Symptom: After power on, the fault displays “Error13” and exposure cannot be performed. Fault analysis and maintenance According to manual error decoding instructions, the cause of Error13 error code may be caused by a filament circuit failure. The transformer T1 outputs 33V AC to the filament voltage adjustment circuit and adjusts to output a constant 25V DC voltage. Ball tube filament