Pioneer gm-d9601

IC707 place black probe on first leg red probe on 3rd leg

IC706 place black probe on middle leg red probe on 3rd leg

IC705 black probe on middle leg red probe on 3rd leg

IC703 black probe on the tab of the regulator red probe on leg 3

IC704 black probe leg 1 red probe leg 3

What are the voltages you get on all of those measuring as described
 
Pull the ic and check all the regulators again as mentioned and see if all the voltages appear correct .

And see if the dc on the speaker terminals goes away .

When soldering the new ic use low heat and be quick when soldering also touch the pads with your iron not the legs of the ic .
 
Place your black probe on middle leg and red probe on leg 1 as seen in the phot what’s the voltage you get
 

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