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抹音部分该机采用直流抹音,电路比较简单.从2BG_7稳压输出的9伏电压经过录放开关2K_(1-9)组,并经过电阻2R_6降压后,加到抹音磁头上.其常见故障有: 1.抹音不净,主要是抹音磁头引线折断或脱焊. 2.抹音磁头引线在印刷电路板上负极碰地短路. 3.录放开关2K_(1-9)组开路. 4.抹音磁头表面粘有磁粉而造成抹音不净,需要清洗. 5.抹音磁头的固定螺钉松动或脱落.
The erasing part of the machine uses DC erasing, the circuit is relatively simple. From 2BG_7 regulated output of 9 volts through the recording and playback switch 2K_ (1-9) group, and step-down resistor 2R_6, added to the wiping head. Common faults are: 1. Erase sound is not net, mainly ebony head lead break or desoldering. 2. Ebony head lead in the negative circuit on the printed circuit board short circuit. 3. Recorder switch 2K_ (1-9) group open 4. Erase head surface sticky magnetic powder caused by erase sound is not clean, need cleaning. 5 ebony head fixed screw loose or fall off.