Macintosh Classic with horizontal interference

[Plasticoat]

Hi all,

this has been totally recapped, analogue and logic, but I’m getting what only can be described as interference on screen, both sides.

I expect you’ll tell me it’s a cold joint somewhere, I just cannot narrow it down,

any help would be much appreciated,

thanks

 

[Plasticoat]

Ok so problem solved, PP1 Phier replaced,

wht da ya know

 

[cheesestraws]

Well found!

 

[techknight]

What is a PPI Phier? 

 

[8tto]

I think Phier is the brand name on the trim-pot

 

[Cinan]

I have the same problem, what lead you to PP1 ?

 

[Plasticoat]

Not being sarcastic , the compact Mac forum, I did a search and from what I remember I was kinda pointed in that direction .

you may want to de solder pp1 and apply fresh solder, It cannot hurt, I now replace as I have a small batch at hand so have made it part of the routine