Dell D610 bleed resistor

[Uranium-235]

so I replaced a jack on this top, and I accidently got my hakko too close to these two tiny surface mounted resistors and broke them off. I took my meter and realized they are a direct line between voltage and ground, which makes them an very high resistance bleed resistor. I found one and could not get it to register on my meter cause ether its damaged or the resistance is just so high. do you think the laptop can work without them (two of them, one for charge, one for runnning power-its a dell thing as the power adapter has two power rails too).

if not, what do you think the resistance is? if I can a small non-smt resistor and put it on cause it might be somewhat hard to obtain the exact smt resistor

[Uranium-235]

Re: Dell D610 bleed resistor

if you're looking at the schematic, the resistor is RV1 and RV2

[yyonline]

Re: Dell D610 bleed resistor

No, it won't power on without it, in my experience.

I think they may be varistors, which could explain the weird readings you're getting. I'm not familiar with what "RV" means in terms of board markings.

I have a pile of D610 boards if you want me to send you some parts...just pay shipping. PM me if you're interested.

[Uranium-235]

Re: Dell D610 bleed resistor

well, look on the last page of this pdf



its right there, do you have any idea what that is? if it is a resistor, can you do me a big and solder one of those off of those boards and measure it for me? I think I didn't get a measurement cause I might of burnt mine

[Uranium-235]

Re: Dell D610 bleed resistor

waaait a minute, is that a diode? this can't be good, I have no idea which way it goes!

good thing though, I should be able to solder a normal diode on right? I mean, a (smaller) full-sized onto the connections where the SMT contacts contact the power jack joints, right?

[Uranium-235]

Re: Dell D610 bleed resistor

yup you're right, it is a varistor! I just looked up the symbol. does anybody know the kinds of tolorences these use? can I find one that has a higher voltage tolorence?

[yyonline]

Re: Dell D610 bleed resistor

Varistors are usually VR... The D610 board is marked RV.

OOh...I'm looking at the schematic now. Where did you find that?

[yyonline]

Re: Dell D610 bleed resistor

Schematic says they're both VZ0603M260APT.

Looked up the specs for VZ0603M260APT, and put them into digikey search, found this:

http://search.digikey.com/scripts/Dk...=283-2998-1-ND

[Uranium-235]

Re: Dell D610 bleed resistor

Varistors are usually VR... The D610 board is marked RV.

OOh...I'm looking at the schematic now. Where did you find that?

google man.

what I wish is that someone made a non-smt one with those similar values =/

soldering even a brand new smt can be such a pita

do these have polarization?

[MapleS]

Re: Dell D610 bleed resistor

how about ??Lithium Ion batteries have a slightly higher voltage range and generate more heat. My suggestion is to purchase NiMH rechargeables - they are safer in a camera designed for regular AA batteries. You can purchase 4 AA NiMH 2500MAh Energizer batteries and a wall charger for $17-18 at Wal-Mart.

[kc8adu]

Re: Dell D610 bleed resistor

WTF does this have to do with the o.p's problem?
smells like spam.

how about ??Lithium Ion batteries have a slightly higher voltage range and generate more heat. My suggestion is to purchase NiMH rechargeables - they are safer in a camera designed for regular AA batteries. You can purchase 4 AA NiMH 2500MAh Energizer batteries and a wall charger for $17-18 at Wal-Mart.

[kc8adu]

Re: Dell D610 bleed resistor

the way these are used the unit should run without them.
they should be across the dc input.they clamp spikes,overvoltage,ect.

[yyonline]

Re: Dell D610 bleed resistor

They do not look to be polar.

Here's a good video with some SMT soldering techniques:
http://store.curiousinventor.com/gui...Soldering/101/

[Uranium-235]

Re: Dell D610 bleed resistor

heh, I saw that video a few days ago, and it sure looks easy...for a new board

but a board that has an uneven surface due to excessive re-attempts at putting this little bastard on, and it sticky all over from excessive flux, trust me, isn't THAT easy

[Toasty]

Re: Dell D610 bleed resistor

<snip>what I wish is that someone made a non-smt one with those similar values =/

soldering even a brand new smt can be such a pita<snip>

Good grief! 1608 metric = 1.6 x 0.8 mm ! = ▪▪

Don't breathe!

A small jeweler's flat blade screwdriver to hold it and the smallest iron tip. Clean pads with solder wick, flux on pads, position part & HOLD tight to board. Tin iron and touch one end. Spin the board 180° and do the other.

Magnifier glasses help and great lighting.

Approx size chart from Wikipedia attached.
.

[Uranium-235]

Re: Dell D610 bleed resistor

Good grief! 1608 metric = 1.6 x 0.8 mm ! = ▪▪

Don't breathe!

A small jeweler's flat blade screwdriver to hold it and the smallest iron tip. Clean pads with solder wick, flux on pads, position part & HOLD tight to board. Tin iron and touch one end. Spin the board 180° and do the other.

Magnifier glasses help and great lighting.

Approx size chart from Wikipedia attached.
.

I can't tell if your first statements are sarcasm or not, are you saying its not that hard?

I used very fine ended tweezers, and fyi the smallest tip isn't always best, but the smallest FLAT tip is. I tried a very fine rounded tip and it didn't work so well. but then again neither did the small flat tip. I think its cause the part was fairly BROKEN off, and not new

[Toasty]

Re: Dell D610 bleed resistor

Moi? Sarcastic? Surely you jest!

It's not that hard. Just don't breathe.

Both ends still have the metal on them, correct?

[Uranium-235]

Re: Dell D610 bleed resistor

umm, sort of. hmm, well, one side of one side has a sliver. it has more metal before my last attempts, but no, not all it should

maybe I should order the 10 for $2 + $2 shipping from digikey (that way I have a bunch of replacements if I screw up)

but then again, you said they don't require these right? this targus $60 dell replacement has some voltage protection, right?

[Pyr0Beast]

Re: Dell D610 bleed resistor

heh, I saw that video a few days ago, and it sure looks easy...for a new board

but a board that has an uneven surface due to excessive re-attempts at putting this little bastard on, and it sticky all over from excessive flux, trust me, isn't THAT easy

Clean off any solder.
Clean off old flux.

apply new one.
wait for it to become sticky
place the component
Solder one then the other pad.

[Toasty]

Re: Dell D610 bleed resistor

Is there an echo in here..........?