论文部分内容阅读
多种故障疑团:一台长虹21K12彩电(长虹 CN—12机心,主芯片为 LA76810A.CPU 为 CHT0406),在收看中无规律地出现跑台、图像无彩色、自动搜索不存台等多种故障。由于收看中跑台,首先怀疑高频头 U101不良,但更换后故障依旧.又考虑到自动搜索时不存台,可能与存储器有关,于是又更换存储器 D702(AT24C04),但故障不变。索性又到长虹维修站购回微处理器 D701(CHT0406)进行更换,结果仍无济于事。
A variety of troubles suspect group: Changhong 21K12 color TV (Changhong CN-12 movement, the main chip is LA76810A.CPU is CHT0406), appear in the watch irregularly appear treadmill, the picture is no color, automatic search, etc. malfunction. Due to watch in the treadmill, the first suspected high-frequency head U101 bad, but after the replacement of the fault still consider automatic search does not exist, may be related to memory, so they replace the memory D702 (AT24C04), but the fault remains unchanged. Simply went to Changhong repair station repurchase microprocessor D701 (CHT0406) to be replaced, the result still does not work.