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First, an array of tests carried out led by an array of light-emitting detection led normal. Then check the analog image processing circuit, an analog image processing such facsimile put tl082 analog switch circuit mainly by the transport, hc4053 and peripheral circuits. Wszservice manual download site
tl082 cis device for amplifying the video signal sent, hc4053 analog switch is turned on by selecting the device and the automatic adjustment of the amplifier gain. If the analog switch is damaged, it will cause the video signal output is too high, resulting in blurred copy for failure phenomenon. The inspection found hc4053 damaged, replace the device, troubleshooting.
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