I got yAMAHA RS S600 for repair, the problem is it have no sound in dsp mode in direct mode i am geting sound, but when i am playing file from usb i am not geting sound in even direct mode also, so i open and investigate where is the problem, i checked the dac chip when i am touching on DAC chip(PCM1681) i am geting distorted sound, then i checked digital input pins with multimeter which i put in frequency measurement mode, i checked the following pins LRCK, BCK DOUT,,
LRCK-44.1KHZ measured
DATA1(pin no -6) alsmost 88.1 khz
BCK and SCK no reading may be its out of range i dont know what would be the frequency on it,
then i shorted BCK to ground using a jumber wire for few seconds , after short clear sound but its last long only few seconds , i try this 2 3 times , also i found that when i am touching the ic sound again going ,
is it problem with this DAC ic or any filter capacitor
LRCK-44.1KHZ measured
DATA1(pin no -6) alsmost 88.1 khz
BCK and SCK no reading may be its out of range i dont know what would be the frequency on it,
then i shorted BCK to ground using a jumber wire for few seconds , after short clear sound but its last long only few seconds , i try this 2 3 times , also i found that when i am touching the ic sound again going ,
is it problem with this DAC ic or any filter capacitor
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