Pioneer VSX-52TX Service Manual - Page 131
Step 7: ROM, Step 8: DSP output digital, Surround L/R data pin 6
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5 6 Step 7: ROM IC851 Slave Select (pin 1) DATA Out (pin 2) DATA In (pin 5) Clock In (pin 6) There is movement when turned MCACC No to ON and does movement stop within 3 seconds? Yes Replace IC851 IC801 BUSY (pin 70) Is about 3.3V outputting it during above operation? Yes Is about 0V outputting it after above operation? Yes End No Replace IC801 No Replace IC801 7 8 Step 8: DSP output (digital) • Digital output when indicating each channel A IC801 SurroundBack L/R data (pin 4) Is pin 4 outputting it? No Replace IC801 Yes Center/LFE data (pin 5) B Is pin 5 No outputting it? Replace IC801 Yes Surround L/R data (pin 6) Is pin 6 outputting it? No Replace IC801 Yes Front L/R data (pin 7) C Is pin 7 outputting it? Yes End No Replace IC801 D E F VSX-52TX 131 5 6 7 8
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