Technical Analysis Case from Beijing Philips TV Repair Center, August 28, 2011
Source: Beijing Philips TV Repair http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3761179.
Problem: When installing the Xiu Yuan brand remote control (Philips PCF84C series computer chip) from Xianyang Xiu Yuan Company, first connect the AC power relay, then connect the line and field synchronization signals and the screen display board. After turning on to check if the character display is normal, there appears no characters on the screen and a single-color raster with scanning lines momentarily occurs.
Analysis and Handling: Initially misjudged as the screen display board brought by the remote control being damaged, so another new screen display board was replaced, but the fault of the color TV remained unchanged. After carefully checking and finding no problems, we could only continue with the modification. After modifying the tuning channel selection and channel control circuit, when the machine was turned on again, the character display, image, and sound were all normal.