UH2/2, UG9/3 and UH6/12 give me 1Mhz square waves.
Nothing on UH6/3.
Nothing on UH9/12, 11, 9 or 8
UG9/6 and UH7/9 have the sameas each other - a 'longer' wave at 1Mhz.
Nothing on UH7/12.
Colin.
Quote:
Originally Posted by SiriusHardware
Let's try following the timing chain for a while.
With all ICs inserted as normal, power on, please scope the following IC pins:
UH2 pin 2
UG9 pin 3
UH6 pin 12
You should have the same signal on all three of the above pins. If you don't even have a signal on UH2 pin 2, stop and report back.
Assuming you do, could you then look for further signals on
UH6 pin 3
UH9 pins 12, 9, 8, 11
UG9 pin 6
UH7 pin 9
(Both of the above two should be the same)
UH7 pin 12
|