According to the user, this machine first bought without the remote control, with a few years after the cable a friend saw machine maintenance, said the original machine reserve the function of remote control, just no. Installed a receiving head, configuration of panasonic to turn into a remote control color TV remote control. Results have been good, can be prefabricated 30 channels. Over the years machine front buttons all failure, unable to search platform, and also don't get many supplementary units. Friend suggested converted into 90 with supplementary channel remote control, but three days later a friend told trouble, more channels, the image is very clear, but there is no color, other function is normal. He had committed, unable to find out fault there, and even the color decoding block AN5601 changed also not line, so we have to find a professional maintenance personnel. pnhservice manual download site
 pnhservice manual download site
 pnhservice manual download site
 pnhservice manual download site
Open the machine cover, this machine use the common painting the supplementary one board remote suite, GaiZhuangXian a lot. Color decoding IC601AN5601K and 2 feet external crystals, deputy color potentiometer R620 have been renewed, such as line flyback pulse circuit also overhaul, circuit board has several cut, modified materials, for the original machine CPU the new remote control wiring parts and control parts, basic no exception. Testing IC601 3 feet color between the control voltage from 0 v to 1.4 v only changes, external resistance R619 upper can change between 0 v to 6 v, 12 feet ACK control voltage is 2 v is low, automatic analysis of decolorization rev control circuit. I speak to resistance of a 20 k to 12 feet to 29 feet, opened the door of decolorization, or no color. The measure voltage 12 feet has risen to more than 6 volt, 3 feet voltage can change between 0 v to 4.2 v. pnhservice manual download site
 pnhservice manual download site
Analysis should be no chrominance signal input. Carefully to find, the deputy color potentiometer R620 found disconnect point have been innocent, right near one and its tiny fracture, is just the 5 feet chroma AN5601 C602 introducing side, resistance measurement that the road is blocked. Find a short wires connected to excitement, boot color perfectly normal.

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