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I have found many replacement DSP chips online

part number tms320vc5501pgf300

I 'think' from looking at the service manual, the audio clock is part of the DSP chipset???

Does anyone think if I replaced this chip, I would have a chance of solving the problem?

That was useful, thank you. I ran the test from test mode, and the keyboard stopped on 'ACK ERR', with flashing lights! :verycool: The service manual says that this is an 'Audio Clock Signal short or Error' and is part of the DSP check (Codec Reset Check) If I skip to the next test after the error ...

Hi again and thanks for the reply. I did try the batteries and got the same result. I will try again however, on the off chance that it gives a different result. What is this DSP test in test mode? I was thinking I could hopefully figure out which board might be faulty and replace it if one came up ...

Hi, First post, I signed up as my keyboard isn't working. I wonder if anyone can help? My microkorg XL will boot, showing eight blocks under the logo before going blank. The tempo light flashes but is not responsive to the tempo dial being moved. If i wiggle the power supply connection, the synth ...