Set came in with the usual complaints: "goes snowy, and sometimes a vertical problem". Customer said that the set was never worked on so I figured I would do the tuner sheild and that would be it. I found that the soldering had in fact been done at some point and it actually looked pretty good. I have seen this repair done before on a symptomatic set and after re soldering the problem was resolved. I understand that there is a "template" for this repair, but I have never used it and have not had any problems with returns. I redid all the points on this set and reinstalled the chassis. I noted that tapping on the top of the tuner causies an intermittent loss of RF. I opened it back up and re did the sheilds as well as all the points on the board within the tuner area. I must be missing something but I can't for the life of me see what it is. I still have intermittent RF. Has anyone seen this before? Thanks, Lenny Stein, Barlen Electronics.
CTC187 intermiitent RF
Sep 21, 2005
7 Replies
Lenny: Either you "missed" a solder point, that is why the template is nice.... or there is a solder bridge, cracked trace, or cold solder joint. electricitym
Lenny get out the Biggest Mag glass you can get ,what I use is an old lens from PTV works wonders.
Jumper wires done also?
Tom
Which jumpers are you referring to?
Ground shield..
Jumper wires which are backups for the various solder grounds. Reliability through redundancy. I worked in a Thomson warranty shop, and it was the manufacturer's standard for the repair. Some maintain that they are not necessary if the repair is done correctly, just like some don't think the flexible solder is necessary.
Tom
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