Need Help !!!
I'm trying to chang my dx7711 clock with kwak clok 7, but i'm confused how to connect to original dx7711 clock pin and which cap and resistor should be removed....
Thank a lot..
Please help.
I'm trying to chang my dx7711 clock with kwak clok 7, but i'm confused how to connect to original dx7711 clock pin and which cap and resistor should be removed....
Thank a lot..
Please help.
Last edited:
That's a horribly drawn schematic. I hate that style, it works but it's hard to see where everything is going.
I redrew the relevant part of the schematic in a clearer way. That 7404 hex inverter forms a Pierce oscillator with four separately buffered outputs. The best way to install a Kwak clock (or any other clock) would be to:
- Remove X301, R310, C308 and C309 (the crystal, resistor across the crystal and capacitor from either end of the crystal to ground).
- Bridge C309 with a link to stop that inverter from doing anything untoward.
- Cut the trace between pins 2 and 3 of Q305 (the hex inverter).
- Connect the signal output of the Kwak clock to pin 3 of Q305 (the hex inverter).
I redrew the relevant part of the schematic in a clearer way. That 7404 hex inverter forms a Pierce oscillator with four separately buffered outputs. The best way to install a Kwak clock (or any other clock) would be to:
- Remove X301, R310, C308 and C309 (the crystal, resistor across the crystal and capacitor from either end of the crystal to ground).
- Bridge C309 with a link to stop that inverter from doing anything untoward.
- Cut the trace between pins 2 and 3 of Q305 (the hex inverter).
- Connect the signal output of the Kwak clock to pin 3 of Q305 (the hex inverter).
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