Onkyo TX-DS595 Support Question
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Question posted by mistypetty1234 on March 25th, 2019
Debug Problem
Current Answers
Answer #1: Posted by waelsaidani1 on April 20th, 2019 6:50 PM
DSPREAD ERROR: Problem of interface between DSP and microprocessor. DSPLOCK ERROR: Problem of lock of DSP IC.
On all occasions the microprocessor resets DSP, and DSP is restarted.
2. How to investigate the unit by the debug mode Apply the signal that the trouble occurs, and compare with the example of display or the normal unit. If there is difference on the display, you are able to check the rejection by the explanation below. If there is not difference, the input signal comes to DSP IC and the format of signal is recognized. Check the signal from the DSP output to the speaker output.
3. Explanation of Display 1. DIR ERROR: Check of digital signal of DIR IC (AK4112). L:There is the digital signal. H:No digital signal. When apply the digital signal, the display is "L". Check the circuit from digital input to DIR IC and the connection between ERF (#18) of DIR and microprocessor.
2. DIR STATUS 1: It displays the status of Addr03H that AK4112 reads from the digital signal. It shows the sampling frequency, and pre emphasis etc. When the display is difference to the table below, check the signals of DSPCL and DSPDA to confirm the communication between the microprocessor and CDTO/SCDO(#28) of AK4112.
3. DIR STATUS 2: It displays the status of Addr0DH that AK4112 reads from the digital signal. It shows the constants of input signal (DD,DTS,MPEG etc.). When the display is difference to the table below, check the signals of DSPCL and DSPDA to confirm the communication between the microprocessor and CDTO/SCDO(#28) of AK4112.
4. DIR analog/digital judgment It displays the result of judgment about input signal by the microprocessor. D:Digital A:Analog
5-7. Addr15 -17 :These displays show the port condition of the flash memory control. "L" except Japanese model.
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