Re: SMD identifying
budm -
i gotta ask...with how little info i gave you, how did you find that? that could well be what i'm looking for. it is an sot-23 case. i find trying to interpret those 'identifiers' to be wacky.
do you know of a website that lists info on these? i run into these smd's pretty frequently. the only times i've found what these semiconductors are is on forums that are specific to that circuit board. and somehow the guys on the site have a way of finding them.
thanks for any further info.
xaxxon
Member
Last Activity: 08-10-2016, 09:16 PM
Joined: 07-27-2010
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SMD identifying
i'm trying to fix a Westinghouse TV's t-con board. i've found a shorted (all leads) surface mount transistor.
the transistor is labeled "7N6" with no other markings. of course, there are no other "7N6" transistors on the board.
i'd like to know what a cross would be, or if anyone has info on basing or whether it's npn/pnp.
i found a site called "rob's electronics" which has been somewhat helpful.
i figured that this was the proper part of the forum to ask a noobish question. -
Re: LG 42PC3D-UD dead no-lead solder arrggg!
thanks for the replies.
flocko: that sounds crazy enough to work!Leave a comment:
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LG 42PC3D-UD dead no-lead solder arrggg!
this 42" has a hybrid i.c. on the y-sustain board that i'm trying to desolder. unfortunately LG used no-lead solder on it. this stuff seems nearly impossible to remove.
does anybody have any tips for dealing with this stuff?
i got a tip on another site where you pre-treat solder wick with solder paste, which helped, but only somewhat.
i've got a 35 watt iron, solder wick, paste and a solder sucker to use. -
Re: Samsung LN-T3242H
selldoor - there were 2 ribbon cables that led from a small board (referred to in the service literature as LVDS or LDVS) to 2 smaller circuit boards that seem to connect directly to the lcd panel.
i took off the cables, cleaned them and reinstalled them. no effect.
i'm afraid to remove the small boards that connect to the panel. don't want to screw things up. do you think it will be safe to do?
ben7 - i'm a tech, but i'm not really familiar with lcd tv's. it doesn't "feel" like a bad solder joint.
...Leave a comment:
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Re: Samsung LN-T3242H
thanks for the reply, selldoor.
as you can now see, i've updated my profile.
i've tried component input, with the same result.
i'll try to find the panel connectors, clean and reseat them.
the picture does seem to improve somewhat if i whack the side of the t.v.Leave a comment:
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Re: Samsung LN-T3242H
these are examples of the "washed out" screen:...Leave a comment:
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Samsung LN-T3242H
it's got a very "washed out" picture, like the luminence is up too high. the picture is normal for about the first 5 seconds it's turned on from stone cold. if it's the least bit warm, it starts up with the problem happening.
i've freeze sprayed every component i can find, to no avail.
sorry about the no pictures, but of course, i'm in one place and my card reader is in another. hopefully, tonight i can post some.
i do have the service manual, but so far it hasn't helped me. -
Re: Kenwood VR-606 Receiver No-Power
try to reset it by doing this: hold the power button down, plug the receiver in, then press the power button again. that should reset the firmware.
if that doesn't help, you likely have a bad stk chip. those are the 2 big black plastic i.c.'s attached to the big heat sink. before replacing the stk's, try reflowing their solder joints.
i think chances are tiny that the power transformer is the culprit.Leave a comment:
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Re: Electronic Blueprint?
pcbonez: that would be much fun, except that i've lost the job posting.
however, if they re-post the job...
Leave a comment:
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Re: Electronic Blueprint?
sorry guys!
i live near the canadian border, but i do speak english.
i had responded to a craigslist job posting where apparently the office manager had done the job posting and referred to a required knowledge of "electronic blueprints".
when i called, i asked what she was referring to. when i asked her what an "electronic blueprint" was, she put me on hold to ask a co-worker(?), and came back to tell me that it was a necessary thing to know.
i assumed, during the phone call,...Leave a comment:
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Re: Electronic Blueprint?
can you post an example?
i know what a pcb layout is. i've made my own circuit boards.
do you think i may be dealing with a somebody without a clue about terminology?Leave a comment:
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Re: Electronic Blueprint?
that's what i thought.
but now i think it has something to do with the actual construction of a circuit board. component placement, hole drilling, etc.
these are apparently produced using CAD programs.
anyone familiar with electronic blueprints?Leave a comment:
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Electronic Blueprint?
can anybody show me an example of an [I]electronic blueprint[/I]?
i learned electronics in the '80s and have only recently heard that term.
thxcan anybody show me an example of an [I]electronic blueprint[/I]?
i learned electronics in the '80s and have only recently heard that term.
thxcan anybody show me an example of an [I]electronic blueprint[/I]?
i learned electronics in the '80s and have only recently heard that term.
thx
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