Pole Position (2) Video issues (Sync off and blocks for graphics)

Scucci

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Pole Position (2) Video issues (Sync off and blocks for graphics)



Is the 07 custom related to controlling both of these?
 
Okay... not the 07 in this case.

The 07 is listed as a clock divider; generates horizontal and vertical timing pulses divided down from master clock (Sync Generator)

I checked the 6MHZ test point on the scope, it's the same freq as a working video board, but a lower (about half) amplitude. Looking at the bottom side of the board by the clock; the PCB under the 74S163 is browned from heat. I can't imagine a 74 series chip being able to run at the heat required to do that and still come out in good shape over a long period of time. Max temp for these is 70ºC (according to the datasheet), that's about 158ºF. I can't see that scorching a PCB. So... she's been running a little hot. But maybe it's still working as intended?

As it's a counter, I have no idea how to test it in circuit.

Anyways... going to keep tinkering till it's either fixed or broken beyond repair. ;P
 
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