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Yamaha DTXpress/DTXplorer/DTXtreme

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Re: [DTXpress] Re: New member

2015-12-17 by keith@...

With limited equipment, even with the schematics, it will be tricky. If you can beg/borrow an oscilloscope you would stand a chance. I still think bad connections are the most likely possibility. Having done a lot of MIL-HDBK-217 calculations in the past you realise how they are the weak link. Another item to check is the oscillator - crystals are susceptible to shock. I have seen them also break off boards during vibration tests.

Now you have the schematics, the things to check are the voltages everywhere. If you get hold of an oscilloscope then you can look at the microprocessor clock and the address, data and control lines to external memory.

Keith.

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