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例1 图像暗淡不清,彩色像油画一样。分析与检修:检修时发现用遥控器将色度调整减为零时图像消失,说明这是典型的亮度信号丢失故障。该机采用日本三洋公司小信号处理芯片LA76832(而54 cm机采用的型号为LA76810)。CPU为I~2C总线控制的LC863324芯片,具有:万年历、场幅变换(16:9、4:3、影院三种)、内置游戏、电源电压显示与检测等多种新颖功能、自高频头IF端输出,并经Q101预中放、I141声表面波处理后的中频信号从LA76832⑤、⑥脚(IF
Example 1 image dull, color like oil painting. Analysis and Overhaul: Overhaul found that using the remote control will reduce the chromaticity to zero when the image disappears, indicating that this is a typical loss of brightness signal failure. The machine uses Japan Sanyo’s small signal processing chip LA76832 (while the 54 cm machine model used for the LA76810). CPU is I ~ 2C bus control LC863324 chip, with: calendar, field change (16: 9,4: 3, three cinemas), built-in games, power supply voltage display and detection and many other novel features, since the tuner IF output, and pre-Q101 release, I141 SAW signal processing IF from LA76832 ⑤, ⑥ foot (IF