Check if the pin 1 is short circuit to ground.
yes, it is. So I need to try find where is short?
To be sure it is really in short to ground, please remove IC3, IC48, IC49, IC50 and IC7 and check again the short.
yes, still in short to ground. So I will check where the short can be,ok?
Yes.
If you can’t easily find the short, you may need the PCB trace plot.
I can give a link to download the document if you can’t find the short.
okay,
I think it will be easier with trace plot. So, please, send me the link.
One possible place for the short is between C59 ground leg (near IC7) and the via hole next to it
yes, it was there, founded now. But RESET pins are still low.
Now you have to check IC3 operation.
Click the sine button down.
Check the voltage on pin 2 of IC3.
Should be high on 1k frequency range.
Click the freguency range button 10k
The pin 2 of IC3 should be now low.
not working, low all the time
Next check the IC2 operation.
Is the output data DC0…CD7 changing when the offset slider is moved?
The sine button pressed down all the time.
no changes on data lines when slider is moved
You have to wait one second after the slider is moved.
Pin 7 state of IC2 should be high when the slider is above the middle point and low when the slider is below the middle point.
Is this still the case: [quote]Also voltage on “signal out” is changing when I’m moving offset bar.[/quote]
not working too…pin7 is high all the time. I think IC2 can be dead, when I remove it the socket then consumption of whole is 80mA lower.
[quote=“VEL255”]You have to wait one second after the slider is moved.
Pin 7 state of IC2 should be high when the slider is above the middle point and low when the slider is below the middle point.
Is this still the case: [quote]Also voltage on “signal out” is changing when I’m moving offset bar.[/quote][/quote]
no it dont work now, I think IC2 was destroyed during my tests.
OK.
If you have no replacement IC at the moment, you can replace IC2 with the IC3 and test again the pin 7 state vs. the offset slider position.
replaced and it works as you wrote - pin7 of IC2 is changing at correct state due to slider position.
OK.
You have to replace the damaged IC.
You may get the generator working “a little” if you replace now IC3 with the IC21.
So the IC2, IC3 and IC19 are installed in the shift register. (IC21 empty socket)
yes 
I am getting some waveform on output, not correct sine or square, also offset and amplitude changing works.
[quote=“VEL255”]OK.
You have to replace the damaged IC.[/quote]
fine, thanks. I will order new one and I will write here.