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CMD305A Dismantlement Method 1. Remove the two screws on the top cover, remove top cover; Then remove the five screws on the heat sink, remove heat sink 2. Remove the six screws on the back cover, remove back cover; Remove the four screws at the left/right side of the unit 3.
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Product Model CED305A Date 2012-8-16 failure failure cause remark phenomena a To check whether the ISO301 16PIN connector is connected well, to check whether the 15A FUSE in the ISO FILTER BOX is loose. b To check whether the FFC like CON202 CON901( 24PIN socket) which were connected the panel and the unit are inserted in place, whether the lock catch is loose.
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J The voltage of the control pin SDA SCL 27 28 of the audio processor IC402 PT7313E should be 3V. a To check whether the AM/FM external antenna is connected well. c To check whether the intensity of radio input signal is too weak. d To check the supply voltage of the 7th pin of the radio board, should be +3V3.