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Best Electronics (Jeff Popp) 600XL Video Mod issue during install...


5 replies to this topic

#1 NISMOPC OFFLINE  

NISMOPC

    Moonsweeper

  • 392 posts
  • Location:OHIO

Posted Wed Jun 13, 2018 4:56 PM

For some reason the kit came with a 20K Ω resistor instead of a 10K Ω resistor.

 

10K BROWN, BLACK, ORANGE, GOLD

20K RED, BLACK, ORANGE, GOLD

 

Location of this resistor is R134 and is the last one I need to solder in place for the mod to be complete.

 

I am not familiar enough with resistance to know if the 20K will cause any issues due to higher resistance.

 

Pictures just because...

 

0613181852a.jpg

0613181852b.jpg



#2 Paul Westphal OFFLINE  

Paul Westphal

    Stargunner

  • 1,280 posts
  • Location:Portland, Oregon

Posted Wed Jun 13, 2018 6:14 PM

HA! I was going to delete this, glad I did not.

 

THOSE INSTRUCTIONS SUCK ( which, after much frustration, I re-wrote ), and you don't always get the exact parts stated. In fact, at Eightbitfix I'm staring at the mod right now. Sometimes after the mod, there is NO COLOR. There is a jumper you can run underneath to correct this. I found it by giving up, coming back later, and my finger bridged a circuit ( yes it was on ) and I got color. I think it might also work as a color boost in some cases. The color Pot will have to be adjusted. I can pull the board out and take a pic of the Jeff Popp mod and a pic of my augmentation of it. No Haters please. Glad I could possibly help.

 

Paul



#3 Paul Westphal OFFLINE  

Paul Westphal

    Stargunner

  • 1,280 posts
  • Location:Portland, Oregon

Posted Wed Jun 13, 2018 6:17 PM

I looked. I have a red black brown in there.

 

IMG_0596.JPG


Edited by Paul Westphal, Wed Jun 13, 2018 6:24 PM.


#4 NISMOPC OFFLINE  

NISMOPC

    Moonsweeper

  • Topic Starter
  • 392 posts
  • Location:OHIO

Posted Wed Jun 13, 2018 7:27 PM

Well ain't that interesting. OK! Sounds good. I'll install it and see what happens!

 

I honestly had no issues with the entire process until I got to the R134. Then I just skipped it and finished the rest. The kit did however come with a 200 Ω for the chroma, but no 75 Ω for the luminescence. I didn't have plans for that part of the mod anyhow, so no cares given.



#5 NISMOPC OFFLINE  

NISMOPC

    Moonsweeper

  • Topic Starter
  • 392 posts
  • Location:OHIO

Posted Wed Jun 13, 2018 7:59 PM

Well I went with the 20K Ω in R134 and it seems to work fine.

 

Still testing and adjusting color pot.

 

I also installed Jurgen's 512K memory expansion board, so lot's of testing to be had on this little boy!

 

0613182150.jpg

 

 



#6 flashjazzcat OFFLINE  

flashjazzcat

    Quadrunner

  • 13,819 posts
  • Location:United Kingdom

Posted Wed Jun 13, 2018 11:43 PM

I looked. I have a red black brown in there.
 
IMG_0596.JPG


Why is there no solder on some of the component legs?




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