bought new Power Board, can't test Main Board - need help using MultiMeters

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

thanks budm, appreciate it very much

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

the 1117 finally came today. i went w/the adjustable for all five

not that great at soldering, any tips?

http://www.digikey.com/product-detai...SCT-ND/1967218

[Ltank]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

Look online for tips. Some are pretty good. Some are not. Take care not to damage board when removing IC . Clean excessive solder. Add a little fresh solder to board. I would solder the largest tab 1st. Don't spend too much time that could burn the traces off. Practice removing and installing parts on a known bad board

[triplefour]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

am i missing something? why have u bought parts before testing the fuse?

and even more to the point, why are you replacing the regulators before testing the fuse, which takes 2 seconds to do?

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

since its a known problem area might as well take care of it

in regards to the fuse, can you help point out where it is? sorry for the beginner question but i dont see anything that looks like a more common fuse

[triplefour]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

i just think its better to test all the "'easy things" before u go replacing parts that may very well be good, wasting time and money... the fuse is probably somewhere near the connector on the mainboard that the psu connects to. it could look like a surface mount ceramic capacitor.. in the picture u posted its right below the connector J1 its white with gold caps

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

well with the help of my dad, i was able to only replace one of them

can you help me locate the fuse so i can check? i looked for J1 on the board and didn't see it but saw a white w/sliver caps

[budm]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

See post 16:
https://www.badcaps.net/forum/showpo...5&postcount=16

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

yeah i looked again and saw them, does it matter which side i measure them?

can they blow if i measure wrong side w/multi meter before i try it?

[triplefour]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

to test fuses, black probe to chassis ground, red probe on either side of the fuse. while power is on. careful, dont slip!

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

maybe its just the fuse!?

readings:

5.17 - one thats horizontal

.014 - one thats vertical

w/TV on

[triplefour]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

Test resistance with power unplugged. A good fuse should measure the same resistance as when the probes are touching each other. On my meter its .03 ohms. U should have seen 12v on that other fuse. If the fuse is not blown then u have some problem with the 12v on ur motherboard...or the PSU is not sending the 12v

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

If the fuse is not blown then u have some problem with the 12v on ur motherboard...or the PSU is not sending the 12v

meaning replace the fuse or something different?

the fuse i could def. replace

[triplefour]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

Check the fuse first before replacing!

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

i get no readings on both?

[triplefour]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

Please explain with more details than less. Were not mind readers! What do u mean by no readings? What is the resistance in ohms across each fuse? Set your multimeter to its lowest ohm setting and unplug the tv. Put the red probe on one side of the fuse and the black on the other. What ohms do u get? Also what ohms do u get when u just touch the probes together? That should be your meters version of zero.

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

this is the new multimeter i'm using so when its in V Check position i get:

.93
.75

when its V- i get no zeros

[budm]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

Are you checking the fuse resistance of the fuse by setting the meter to Ohm mode? TV not plugged in of course.
"when its V- i get no zeros" I have no idea what that means.

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

"when its V- i get no zeros"

sry about that, i meant i didn't get any reading or numbers displayed on multi meter even a zero


in Ohm setting at:

Ohm multimeter set to: 2m
Vertical Fuse
top is -.012
bottom is -.012

Horizontal Fuse
left is -.013
right is -.013


Ohm multimeter set to: 200k
Vertical Fuse
top is 1.1
bottom is 1.1

Horizontal Fuse
left is 3.0
right is 3.0

[GR3Y5H3ART]

Re: bought new Power Board, can't test Main Board - need help using MultiMeters

hope its the fuses?

the voltage regulators would be really hard most likely impossibly for me so hoping its the fuses? i think i can handle them