Shorted diodes in the bridge rectifier can also cause the fuse to blow.Check the diodes .If they are shorted,replace and try.
In one SMPS power supply I replaced the capacitor but still the fuse blew.When I checked the diodes in the bridge circuit, I found two of them shorted and they are directly across the supply and causing the fuse to blow off. When I repaced the two diodes it started working fine.

 

Shorted diodes in the bridge rectifier can also cause the fuse to blow.Check the diodes .If they are shorted,replace and try.
In one SMPS power supply I replaced the capacitor but still the fuse blew.When I checked the diodes in the bridge circuit, I found two of them shorted and they are directly across the supply and causing the fuse to blow off. When I repaced the two diodes it started working fine.

I'll ask for your opinion if I need to and before posting read the whole post first

 

i'm here. why are we cutting off the path now?

 

to enable the DC to DC converter.
Since you cannot remove the SMD transistor without damaging it, this is the easiest and safest way to test the IC.

 

alright. well i'll try it right now.

what point of scraping off orange part. wouldn't i just need to slice at blue to isolate it?

now the orange square. some of square isn't green. has part of white line. do i scrape that off too or just the green and go around the white.

 

Scraping is needed so you can put solder and join the track if needed.
Scrape the whites too.

 

do you mean from the number 2 in this photo to pin 7? http://forum.allaboutcircuits.com/attachment.php?attachmentid=18656&d=1271888406

pin 7 meaning right side second from top?

from number two of that photo to pin 7 doesn't have continuity. just says OL before i even scraped it.


HAVEN'T SLICED YET THOUGH
unless i sliced it while scraping to see tracks. but i highly doubt that cause i was doing it lightly with an exacto knife

5.69Ω to both #2 in photo and one next to blue line to pin 7
pin 3 to ground 17Ω

21kΩ to #2 in photo to pin 6
and one next to blue line to pin 6 is 0.1Ω

 

John doe,your photo's are better than the problems,you are paving the way
for better repairs on a lot of different things,you open the door to photo repairs
with the red line to direct help to the member,how about later demostrating
the camera setting and type of camera.The last close up was the best to be
posted on forum,perfect focus.

 

im impressed by the macro abilities of your camera also.

 

i got to take off. one of the cameras i used isn't that great from a distance. the other one is good at both. but they are pretty cheap cameras. will post details and stuff later. got to get going though. might get on super late tonight to see if Rifaa responded

 

I have relabeled the digram to make it more clear.
Follow as in post 341

 

We need a update on t.v. repair,people are forgetting about It.

 

Did you guys declare the T.V.dead.

 

sorry. i have a lot of homework due. and my cousins came in town for my little cousins birthday.

7 homeworks. 3 labs. 1 project
will get to it tomorrow.

i've finished 5 of the homeworks. working on project and typing labs.
catching up cause finals are next week
sorry

well i guess i can isolate it tonight once i get home.

 

alright. picture is still red

um from pin 7 to collector.
it is 2.6 MΩ or 2.something MΩ

now if i go into that green section it is 0.2Ω (so i'm guessing i cut it right
if it there is continuity in green section but not on collector itself)

from ground to pin 3
it is 29Ω

so i powered on. picture is still maroon, reddish colored

so it is IC?

 

Ok.. to confirm IC you need to check the voltage at pin 3 of IC, and also voltage at pin 7 of IC. measure these two values.

 

alright. will do that right now. i'll be typing my labs at same time. will be here for about 3-4 hours. so hopefully get/are online Rifaa. can get a lot done with the tv in that time.

standby
3.8 DCV at pin 7
5.03 DCV at pin 3

on
3.7 DCV at pin 7
5.06 DCV at pin 3

 

Sorry about last night, I had a lot of work, was up the day before and night, so I fell as sleep.
The IC is working, we have 5V now, this is bad for a fact that there is another problem, but now we proved standby transistor is faulty, but since we bypassed it, we'll leave that for later

We have to start on the 3.3V.
I'll tell you what, I'll PM u my no. and you can just SMS me when you have time, If I am there, you'll see me online, this way work will progress faster.

 

Ok, if you are going private, you BETTER post the results when you are done!

 

No worries fellow members.
I wonder how many members are keen on this thread.
Mind posting your nicks, who ever is watching how this progress.
I know a few only, those who post on this thread.

I am not going private, I just gave him my no.
I figured Mod will snip it if I post it an open forum
I have nothing to hide for yet.