Interesting INTV 1 Main PCB Variation

[Duttroid]

Hello

 

I got a very disgusting Intellivision console a couple months ago.  It was listed as "for parts/not working." It was caked in fine dust, the controller buttons disintegrated, and probably had a bunch of other unfavorable characteristics.  

 

I cleaned it, reconnected the Main PCB and Power supply PCB with new wire, recapped and replaced the transistors.  It works amazingly well.  

 

I returned to modify it to work with my System Changer a few nights ago but noticed that R23 and R24 don't exist - there's just a long trace beneath the RF modulator.  There are some other noticeable differences on the main PCB layout.  Also, hex-head screws are used to secure the internals instead of Philips pan-head screws.  I found this interesting.  Is this interesting?  Also, should I attempt to modify it for System Changer use, and just ignore the part about removing R23/24? 

 

Thanks in advance.

[mr_me]

It's an early model, first half of 1980, made in USA. What's the serial number?

[Duttroid]

071211

 

Thanks for your help!