Sears Video Arcade II AV Mod stuck in da mud..

[JATO]

I have a AV Mod board from Electronic Sentamentalities For the 2600 and SVA II..There was install  instructions when I bought it but it's not for the board I have with contrast and brightness controls. So now I have 4 TIA connections from the mod board that are connected at cr15, cr14,r20 and r22 but have no idea what TIA connections go where. There are no Schematics for the SVA II and the instructions I found don't match my board..Anyone out there that has done this install ??                       The connections are marked as tia2 tia5 tia7 tia8. Already have tia6,9,12 and 13 connected to the bent out pins on the Tia. And have s-video comp and audio connected..

Edited February 14, 2021 by JATO
add

[cbelcher]

Yep - did this mod a week ago with the Longhorn Engineer mod - I think it may actually be nearly identical...  But at least you can follow wires for the labels to the points on the board.

 

Start here:

https://longhornengineer.com/deprecated-static-pages/diy/atarivideomods/2600-searsva2-ntsc/

 

And the all important missing picture from that page is here:

 

 

They are pickup points for the TIA pins as well as 5V and GND.  You can try following wire colors from the other photos but safest to confirm with a multimeter on continuity mode between the resistors / diodes and the TIA chip pin numbers - which you seem to know.  

 

 

 

 

[JATO]

Ok that picture will get me back on track for the most part.. I see where you got 5v and ground from the console..Where did you connect ground c16 to the mod board ?