Clock Oscillator circuit

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I have a circuit on a synthesizer. It provides a clock for keyscan. I have included a schematic. The osc. is 10kHz +5V -9V. How does this circuit work?
I have replaced the IC with CD4069UBCN. The cap is 1200pf.
Thanks
 

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I notice from your schematic that the 4069 is fed with 25 volts in total :bigeyes: Datasheet says 15 volts max if I remember correctly.

122 is 1200 pF (and hardly broken) but if you want to test you can take 1 uF and 1 Mohms this will create a real slow oscillator. Don't forget to tie the 3 free inputs to either ground (pin 7) or supply voltage (pin 14).
 
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