OK - I went too quickly. Let's try this again.
SA0-SA9 on both UF7 and UF8 all have square waves a c. 4V.
Both UF7 and UF8 pin 10 are high at 4.14V.
All pins noted below on UF9 go high and steady at c. 4V.
Colin.
Quote:
Originally Posted by SiriusHardware
But you still have activity on the SA0-SA9 lines of UF7/UF8? And the pin 10s of those ICs are still constantly high, no waveform?
Edit: Just noticed you mainly checked the outputs of UF9 rather than the inputs.
Look on UF9 socket pins 3,18,4,17,7,14,8,13, is there activity there or are they steady state? (I know you've already said 7 = steady state 2V, what about the others?)
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