huhuhu, actually this thread almost the same like "ZTE Modem Mod, Really NTBD mod." from ianho and "modem box, no work log, just pics to show" from exkay.....
the different is the way to cool ur modem hehhehe by using 60mm fan
just wanna share my idea to all ZTE user how to cool down ur modem
nothing to explain, u just see all the pictures below .....

Inside modem and the layout position of fan.....


After perfect measuring, cut hole and attach the fan....


After all done view from front....


View from back.....


Light, camera and action......


Take close look


all that i've do in 1 hour.....
actually not complete coz dont have complete tools....
wanna change all 4 long screw and adjust the round side .....
and maybe wanna fix with air filter to make it nice.....
one thing that i worry about is dust that come in.....
so do u guys think i should blow or suck the air....???
if any comment / idea / suggestion plz let me know...


UPDATE

- change screw and add aluminium net


- added LED for LAN indicator 04.05.06


- fix the blur LED 07.05.06


- fix the power for fan, take from power adaptor connector. so now only 1 cable speed sensor that goes out 08.05.06



This post has been edited by 2uk3y: May 9 2006, 10:57 PM

It's more nice if put some ramsink on top chipset and blow it. Btw, where u connect fan power DC?

put some passive heatsink on the chip and blow the fan to it

good idea there

cant put ramsink coz the space only fan fix the fan.....
for power i connect with 2 x 3pin extension cable to fan controller

dont enought space, only can fix the fan....

tq

Then make one another box using acrylic or find some tupperware.

erm...

not sure about this question...

wll it void my tmnet warranty ??

i mean my modem is covered by tmnet, if i mod using a passive heatsink, will it void the warranty ?

hehe....

thanks

NICE MOD.... was thinking of doing it, but scared will void the warranty...

if u say not VOID... I WILL DO IT !!

that be more cost ma....for me min the cost as possible

hehehe of coz void the warranty......
do u see this ....

if ur modem new dont do it, if u ready to take risk nothing wrong to try

just come back from hardware shop......
bought aluminium net to cover the top.....
and also some short screw n nut.....
so this what i've done.....



overall for this mod woderfull since the budget for this really2 cheap....
n now my modem really cool n 'cool'....
i think wanna put some led to make it look nice .....

NIce there but have u though that the dusk with be accumulating inside the modem and may i mean may causes static inteference as dusk become more...

i wanted cool off the modem as well but cant see much alternative besides ur way there... others even create a new box for it which is time consuming and a bit dangerous >_<.

This post has been edited by Doom: Apr 29 2006, 11:55 AM

wow! nice mod!
I'm noob in modding, so juz wanna ask, if u put LED, how to you connect the power to it?? Thanks.

Im gonna take all the risk and mod a brand new modem..since my modem always die 1 month or so after the waranty...gotta go to lowyat to hunt for the modem....heatsink...fan....and thermal compound.

to solve that, actually i do cleaning twice a month for my pc and same time can clean the modem hehehehe
btw thanks for comment
u can mod using ur way, but for me this also can do

thanks just wanna share
that the problem, i think wanna share it to the power modem....
so some calculate must be made to know which resistor i must do.....
or any others idea for that .......????

go on dude......then share what u have done

Errr....... How about put some LED there....... it's nice for nite time surfing net wif yr modem.......

wow nice
after this would u like to evolve it to water cooling??

Woot!!! now everyone is modding their modem!!

Any way to mod the fan without using external/additional power supply. I don't think Ramsinks work. My Aztech modem is so hot that I placed it vertically. Opening the unit does not help. There is a 2cm heat radiation from the modem. This is also my fault since I used the old aztech modem adapter on the new unit (I thought it was the same) since the modem is the same, but the new one requires less voltage. I successfully pumped in additional power and when I revert to the old modem, the modem is too weak to be used- so now staying with the old adapter and new modem.

yeah in progress....!!!

water cooling ??? not yet now coz the cost kills me

ha ha ha

actually i also dont want the external power but what can i do.....
still dont have the solution....that how i wanna some ideas from u all
i wanna share power with the adapter, but i think to risky


for now i'm planning to add some led for make it nice.....
now in progress with calcutation process....
will update soon

Does all modem have a chips in the center where it is the most heated part of the modem??

@ evilhomura89
dont know la about other modem, but this for ZTE 831 users

How much you but that aluminium netting

u mean buy it is ??? 1 meter x 1 meter = RM5
maybe at ur place different price lor.....

What is the netting for exactly?

what do u mean ??
if u mean why put the net at the fan, so the answer to capture dust i think....
coz i read one article dont know where, about how the net can minimize dust going inside pc

nice mod
where connect the fan power to

to fan controller, using 2 x 3pin extension cable... haha so long

I think he meant what for like, for mosquito maybe?

This post has been edited by seveneleven: May 1 2006, 04:00 AM

bro i have an idea. why dont you remove the LAN LED. than using another LED, you can tap the power from there and have a nice blinking effect on the fan while you're surfing.....

Yo shah, since ure 1 of the electronics experts here. Just wanna ask bout those modem LEDS. They're running on 5V or 12V? I wanna solder sum wires in parallel to the LED n power sum blue LEDs n a 40mm fan for my acrylic modem.

i think so hehehe

yeah good idea

yeah i also wanna know power for that led......???
but i think lower than that, maybe 2v only la

the modem LED should be running at around ~2V only. you can connect another LED in parallel but if you find that the LED became too dim, you'll have to remove the original modem LED. for powering your fan, i think most modem runs from a 9V adaptor. just tap the power directly from the adaptor connector on your modem boards. but please make sure the adaptor is DC. i've seen a modem use an AC adaptor with the bridge diode inside the modem.

Ya. I happen to haf the silly AC adaptor.

now now, dont cry yet...there's still a way to do it. the LED mod can be done just fine. the fan will be a bit tricky. you need to find the bridge diode output and tap the power for your fan from there. very easy to do. btw what is the voltage output of your AC adaptor? maybe i can help you if you have a high res picture of the modem boards

Take a look at my thread. C if u can c the pix clear enuf. Thanks for the help.

u can try to mod the fan draws the power from usb port(5v)

wow....

actually i already voided my warranty...

i opened up the casing 2 weeks after i got my modem,

but i managed to ensure the void seal looking like it was not tampered with....

i dunt know, since the modem is given by tmnut... and it is still new, but it is REally HOT !! crazy Zte Modem....

anyways...

maybe i can just find a Zte Modem which is spoilt and replace the casing.... 1 casing at stock, the other one i can mess around with

actually i found out that blue n white led operated on 3v-4v.....
so in this case, if gonna use the LAN led as source, i think can use red, yellow or green coz this led will function at 2v only

so what do u think when u look this....
can the fan connect direct to it ???
or must add resistor ????
my modem adaptor output = 18VAC......
so whats ur idea ???


that a good idea, thanks

ha ha going to mod ur modem is it ?....
so dont forget to show it later !!!

erm.... modding it soon...

currently this is how it looks like....




A 120mm fan sucking air from on top of the casing.. ehehe....

ok already added LED for fan taken power from LAN LED.....
so let see...


cutting the LAN LED and connect it with resistor....
not good solder n cutting actually


all done n light it up....


zooming in......


in dark action....


i connect the led using parallel...
i found out that the led not as bright as i expected........
i think coz the power for LAN led is only 2v.....
but if only using 1 led, its so bright....
so now when i surf, the led also blinking

so everyone plz give ur idea n suggestion on this mod....
hope to fix the LED bright n also the power for fan

Power for the fan:

that rounded thing is not bridge diode look at the picture below (ianho's modem). see those 2 caps that i pointed at. one of them is the power filter caps and you can tap the power for your fan from the +ve leg of that cap. just measure the voltage and the one that have the closest voltage to the output of your adaptor is the one. i think its the cap that is closest to your adaptor port.

now if the voltage is higher than 12V, you could use LM7812. this voltage regulator will reduce the voltage to 12V.

LED:

what is the value of the resistor? why dont u try connecting the LED without a resistor.

ok now i understand..... but if +ve to +ve leg for capasitor, where must i connect the -ve ???
for info my caps is 470mF , 35v

for the LED, i only use 1 ohm, but i have try not to use resistor but still the same .....
so what happen actually

-ve goes to any ground point you can find...or the -ve leg of the cap

there's already a resistor on the board to limit current for the original LED. the current from that point is not enough to drive 4 LED. if you can trace where the resistor is soldered on the modem board, u can replace it with different value. good luck.

owh... COOL GUIDE>..


Is acrylic really that expensive ?? or PLEXI ??

acrylic is not expensive but if you bought at hardware store they will ask you buy in large quantity. for small quantity, you can buy from bombman.....no minimum size

actually i just got customed and bought myself an acrylic shrouder for my HeaterCore.


270mm X 140mm + 120mm hole + workmanship = rM 25

erm.....

i think that is expensive.

and i just got myself a plastic cutter, i was playing around with,

its not that hard to cut this plexi @ acrylic....

Can always bond it with EPOXY

i feel sad....i just opened up my aztech modem thinking i wanna stick one of my old NB heatsinks on the main chip....ended up the chip is friggin small and the caps n wat not around the chip prevent me from putting the heatsink on it....the only way i can think of putting heatsinks on the chips is by using 2 of the CM ramsinks....and sadly...im fresh out of those

erm....

i think there is two batch of this ZTE modem...

coz mine comes with the big chip rite in the middle

hehe sorry to hear that

yeah, really ??? can i see it, post some pic la !!!!

hehe....

My Modem Still virgin... haha....

erm...

i managed to opened it once, and put it back together....

the sticker i sambung a bit....

so looks like i never tampered with the modem

ha ha affraid to void warranty ha

ok i've made some fix about the led that blur.....
i've cut the default resistor at the board n connect direct to the led....
so this what happen....

BEFORE....


AFTER....



so now got to think how to connect the fan from the capasitor !!!!

show some pics of the LED connection ??
you cut off which resistor ?

u can see at Post #39

ok actually lazy to open back my modem.....
so the resistor that i cut is near below the LAN led......
why there ? coz i see there is connection between it.....
so i try to short it with wire n i get the brighness led....

ok...so you found the current limiting resistor. now, lets do the fan. can you read schematics?

oh...and what is the voltage readings at the +ve leg of the capacitor?

This post has been edited by Shah81: May 7 2006, 06:22 PM

nice mod there

but i think you've forgotten to make holes for the air to flow out ??

yeah finally found it, thanks to u

yes i can read schematic coz i study electronic long time ago
ok the capasitor is 470mF , 35v....

so whats next ??

actually the modem already have many holes.... up and below !!!!

the voltage reading is 35V!!!!! are you serious??? or is this the capacitor ratings on the label. you have to measure the readings with a multimeter at the +ve leg of the capacitor. the one closest to your adaptor port.

i think it should be around 15~18V.

This post has been edited by Shah81: May 7 2006, 07:05 PM

hehehe actually i just read it the label, not measure it
coz i dont have multimeter that already broken 2 years ago ......

so can anyone measure it for me, plz ???

ERM...

I have an extra multimeter here.. hehe...

erm... ur mods look tempting .....

maybe i shud... Mod my modem.. .erm.....

i think someone is selling a FAULty ZTE MODem....

maybe can get that....

so you're doing electronics mod without a multimeter i wonder what voltage u're feeding that LED...hope the LED will last

i need the voltage reading to make sure. if its already 12V, why waste the money on a voltage regulator.

@zahri
maybe you can help us here. take the voltage readings on the capacitor and the LED.

@shah81,

Will do, once i have reached the "DONT CARE" state of mind

hehehe...... Dont worry that state of mind will be coming soon haha.......

wooo....a lot of valueble infomation is gone

yeah yesterday all guide u give gone.....

so rewind again that i remembered la hehheeh....
so where to start ..........

so this C1 n C2 that nearest the adaptor port......


so this is the +ve leg for that capasitor......


so what i do is measure the +ve C1 leg to -ve leg for adaptor......
so the reading is 8.8v...... then measure the C2, also the same.....
i recommended u all to measure 1st before connect it using ur fan
so i connect like this......

+ve Fan --> +ve C1 ........... -ve C1 --> -ve power adaptor

so now more cables out, but only the speed sensor that i using it......


another shoot......


so i think complete the mission......

really2 thanks to my bro, Shah81 that guide me with his skills to make this mod looks cool and 'cool' hehehehe

This post has been edited by 2uk3y: May 9 2006, 11:10 PM

If the Capacitor read 35V no worries, coz that is the limit...

Meaning, if you never xceed 35V the capacitor should be able to handle it...

if exceed... then KABOOM!

why would the voltage be 35V when the adaptor is only outputing 18V???

it is already measured by 2uk3y that the voltage is only 8V.

it could be that they ordered the 35v volt CAP

aiyah... I never said the voltage is 35V...

Im saying, if you get higher rated capacitor voltage it will not damage the capacitor if there is a sudden increase in voltage/surge...

That is the good thing... but the downside is the size will be much bigger and price will increase too (compared to a same Farad capictor at lower rated voltage)

Yeah...... this is call nite surfing style wif LED Fan modem, great job!!

Anyone selling off their ZTE 831 ?

u want ok or faulty one ???? try search in garage sales, i saw ppl sell their faulty modem and also the ok modem.....!!!!
wanna mood ha....!!!

i searched already for the faulty one, could not find it,

i saw last time someone selling it,

was thinking of modding the faulty one... hehe....

I have one recommeandation to 2uk3y's modem mod...

Hey bro, since u've mod u're modem, why don't u spray the casing to another colour?

White?
Black?

Nice huh?

thanks for the idea bro.....
actually i want to spray it but to bz for that.... so i just leave it there......
so far no problem .... maybe a little bit dust that come in....

so after 6 month, i already feel bored with this mod.....
then i think wanna make some mod by transfer the modem curcuit to inside my casing.....
but i'm to bz la...... need to find some time to work that

wah modem will get so hot to require active cooling?

my cable modem like not much heat emitted at all

haha its not the heat problem just that most of the people in the mods section all NBTD haha so they mod anything they can get their hands on

Yeah?
Have u tried opening the case of you're modem and touch the IC on the modem itself?

Try it, then you'll know either you're modem is hot or not...

I think it will eat alot of dust inside?

nice work but the colour not really match to the modem.

better spray new colour like black

look stylish

haha lol.....modem oso can mod -.-!! my dvd burner oso hot , can it b mod =.=?

its a burner, so its hot... j/k j/k

my ZTE 831 board is different from yours =.="

mine seen more complex... i don't know E&E

This post has been edited by phwee223: Dec 13 2006, 12:53 AM


Attached thumbnail(s)

yeah there is dust but not much....... coz most of it stuck at the net

will spray it if got time n $$

yup can, if u creative hehehe



hmm.... look different from mine....
what manufacture year of ur modem ???

behide the ZTE831 state DATE: SEP 2003

and i just update more clear picture replace previous picture.

anyway this modem is left by streamy technician after their test up my connection, then they lend me this modem, cause my aztech modem is not compatible at my area, when i phone their hp back ask where should i return them back, they say they will pass by my house and take from me, day after days no news from them then in the end this modem is mine already LOL.... beside that i don't really feel what they say is very heat, maybe i'm not always use this modem, ramdomly change my modem with D-Link DSL-500T.

beside that i got ask the technician is this modem good? he say this modem compatible almost 90% area's DSL, he say can't buy from shop is provide from TM-net, is that true?

This post has been edited by phwee223: Dec 13 2006, 12:41 AM

such a small fan without heatsink helps a lot of cooling ?? my modem is constantly hot 24/7....but juz a little fan really enough ???

Yes!!!

Because there's zero airflow in the modem, so the heat is stuck inside...

Even if there is some airflow, it's near to zero...

Putting a silent 80MM fan on top of it will do the magic...