Tutorial of Reballing by Jovy Re7500 - Page 4 - GSM-Forum

**Dan Collins** · 09-21-2010, 00:33

Raheeeeb,
Took a look at your profile. I cannot get any heat from the upper heater if I set it to level 7. As a matter of fact, I haven't had any success with getting heat within the profile times until I set the upper heater set to 2 and also lower the board holder to get the board closer to the lower heater. Now I can complete a profile in about 5 minutes. Maybe my heaters don't get as hot as yours because I use a 220v-120v 2000 watt converter
If you apply heat for too long to a board it will damage it.

Raheeeeb · 09-30-2010, 07:37

Sorry!

what you mean by level 7 , you mean my guide for using upper heater to accelrate the prehaeting or else ?

Sure, too long process and using much heat damage the pcb and the IC.

alexlaboratory · 09-30-2010, 08:00

This solder Station its the biggest pice of rubbish I ever use in my life

this crap ain't worth 5 cents

sorry to say such bad feed back but its true

I fact i got so upset I chuck it in the rubbish!!

note: infra red solder station are absolute useless regardess manufacture or model.

That's why HAKKO or JBC dont use infrared crap.

Also to Raheeeb I know you trying to help people using this machine.................Look if you ever in melbourne australia and you want to see un engenier using proper techniks, procedure and tools on smd soldering just came to my small lab and I will open your eyes!!

MISTER_CHIP · 10-01-2010, 09:47

Please test this thread Reballing • Ver Tema - [DESMONTANDO] Los mitos de JOVY (VIDEOS)

There the friend Wolverine manages to reballing removing ceramic machine.

A greeting.

__________________________________________________ ______

Por favor, test este hilo Reballing • Ver Tema - [DESMONTANDO] Los mitos de JOVY (VIDEOS)

Ahí el amigo Lobezno logra hacer reballing retirando la vitrocerámica de la máquina.

Un saludo.

**Dan Collins** · 10-01-2010, 13:04

Raheeeb, I mean the height adjustment on the upper heater.

Alexlab, Usually going from hot air to infrared is more difficult because you are use to certain procedures. But take it from me, throw away all you know when using infrared or the results are what you experienced. It took me over a year to get it right, but now I can do it with a great deal of success. Pulling it out of the box and having it burn everything up is expected, I've been there. I have made so many modifications to the Jovy, you would hardly recognize it. We are all on our own out here with no help or info from the Chinese manufacturers. So that's why I always say you must have a lot of patience and do lots of research.

Dan

Raheeeeb · 10-03-2010, 13:08

Quote:

Originally Posted by Dan Collins

Raheeeb, I mean the height adjustment on the upper heater.
Dan

That level (7&6) only to use as background heating - indirect heating - at the preheating process. It is not involve in the main process ( Soak or Re-flow).

The height relatively with speed and spot of heating area. Up wide spot and slow going down gives smaller and speed.

only level 1 I use for mobile phones re-balling and some of Iphones and BB.

About the fact of large heaters , I use zone heating from up and down. only area underneath the IC and re-flow from up with the suitable reflector.

Keep up and give us your modification results , there are a special post for modification.

Raheeeeb

reply4reply · 10-30-2010, 19:58

you guys blame the machine but you're wrong, I've been reballing laptops for a year with t870a that's half the cost of jovy and is way more basic than jovy
I can buy 10 jovy's but I still use my t870a because I modified it myself, I added and took things off it to suite me.

you can't reball because you're using too much heat or too little heat, the wrong flux type, the wrong flux amount ect...

I can reball a gpu with a heatgun and a household light bulb from so much reballing...it took me 1 year to finally get the skills in a world of no real video tutorials, those on youtube are crap! dont follow those...

I was depressed...angry but most important patient! patience is the key to a succesfull reball...I must've ruined 100 laptops before I could succesfully reball the first laptop..

be patient..its not easy reballing is really really really hard.

Trion · 11-05-2010, 19:50

@reply4reply,
Could you please share more info about your findings and perhaps put up some videos of your own?

B.R.

Trion

pentu · 11-13-2010, 13:24

Quote:

Originally Posted by Trion

@reply4reply,
Could you please share more info about your findings and perhaps put up some videos of your own?

B.R.

Trion

Hi Trion,

The Video of Red Glue Removal around the BGA IC on Laptop Mother Board as requested by you, it is in MP4 format, approx 12 mb.

link for download

Hotfile.com: One click file hosting: Red Glue Removal.mp4

Bye

pentu · 11-13-2010, 13:27

Hi Trion,

Next i will post Re-Balling Video of BGA IC using direct heat stencils

Thanks

gumoff · 01-25-2011, 22:56

Quote:

Originally Posted by reply4reply

you guys blame the machine but you're wrong, I've been reballing laptops for a year with t870a that's half the cost of jovy and is way more basic than jovy
I can buy 10 jovy's but I still use my t870a because I modified it myself, I added and took things off it to suite me.

you can't reball because you're using too much heat or too little heat, the wrong flux type, the wrong flux amount ect...

I can reball a gpu with a heatgun and a household light bulb from so much reballing...it took me 1 year to finally get the skills in a world of no real video tutorials, those on youtube are crap! dont follow those...

I was depressed...angry but most important patient! patience is the key to a succesfull reball...I must've ruined 100 laptops before I could succesfully reball the first laptop..

be patient..its not easy reballing is really really really hard.

.....so is way too expensive what u r paing _4 it !!!
-time to spend, ur own reputation (unless u own 100 xbox360's && 100 ps3)
_finally money that u r going to lose during that time or to spend for additional acc/equipment.

user manual don't even explain any of setting regarding u.h.,
i was able to reflow w890 at 160C which is impossible "in real world"
(PB-Free melts at..)
have a look at (xbox) experts forums... u will find some advices about picking right device...
bcos for laptop chips ref-flowing u can use hot-air, same for re-balling them

i think my choice, was biggest mistake of my life...

Halim_xu · 01-26-2011, 13:56

Quote:

Originally Posted by reply4reply

you guys blame the machine but you're wrong, I've been reballing laptops for a year with t870a that's half the cost of jovy and is way more basic than jovy
I can buy 10 jovy's but I still use my t870a because I modified it myself, I added and took things off it to suite me.

you can't reball because you're using too much heat or too little heat, the wrong flux type, the wrong flux amount ect...

I can reball a gpu with a heatgun and a household light bulb from so much reballing...it took me 1 year to finally get the skills in a world of no real video tutorials, those on youtube are crap! dont follow those...

I was depressed...angry but most important patient! patience is the key to a succesfull reball...I must've ruined 100 laptops before I could succesfully reball the first laptop..

be patient..its not easy reballing is really really really hard.

Hi All...
i was thinking about my big mistake in buying a bga rework machine before i search and join in this forum..
i bought a Zm-r5860c from china directly with a lot of hope in it..first,i used the company profiles to set the temperature in desoldering a gpu chip, it gaves me so many pop corn on it and i could't move the heated gpu on pcb..,i kept tried and pushed myself to find the solutions out and look carefully on the process..at the time i only saw it showed me up one by one pop corn on it...then, i got some explanations from the seller that a pcb need to be preheated before heated/desoldering/soldering just because humanity on pcb, but the result still the same, i was frustuated, really wanted to ask the solution from the people who ever used this kind of machine for sharing but i couldn't find anyone., and i callled the seller but still could't solved the problem yet...
then i found this forum, i read more about bga discussing, and get some ideas, tips and explanations to do this thing better..i read and realized most of the successful people spended about one year to know and mastering in bga rework..then, i see my self, i just do this for 3 weeks...
now, i keep trying even there are more than 20pcs of gpu chip on pcb already kill by me..
all i want to share,,a machine can't only work for us easily for first, we have to spend more times to close with it with more practices and learn to know how does it work...and put some feeling in it... be patient friends ....we'll be grow in this forum once we share our experiences together... Gud Luck

Trion · 01-27-2011, 18:30

@Halim_xu,

Popcorn means too much heat. See the problem with most budget IR machines is we can't actually know the correct temperature of the chip. We may think for example its at 180 degrees when its actually at 205 degrees. This should be verified with another temperature probe or an infra red thermometer (available for under 50USD).

The temperature settings depend on the chip being reflowed or reballed. For example in NVIDIA chips the melting temperature is 215 degrees, but some rare pieces need a slightly higher temperature. IN case of Nvidia Chips you need sufficient heat from below and not too much from above. Too much heat from above is causing the "pop corn effect". Do use some good quality flux.

Here's a tip to know when you have reached the temperature for solder to melt. Find some small capacitor or resistor next to the GPU you are working on. Use a metal tool like a dentist's dental pick to move the component around the temperature you think it should melt (183 deg for lead based, 215 for lead free). Once it moves, its the right temperature. For lead free solder avoid going higher than 230 degrees as it can damage the chip permanently. You can re-solder the small part later.

Another suggestion is find someone in your area who can show you how to use the machine. Once you see the process you'll have an idea. And also every machine for IR rework that's not costing 10,000 USD and above is unique and needs you to learn its particular settings. That's why profiles may not be that useful. Always preheat the board at least up to 80 degrees and then start the rework. Watch videos by others and get some ideas.

B.R.

**Dan Collins** · 07-10-2012, 02:07

Some interesting systems there. Bet the price is intersesting too. Give us a clue.

bishnutimilsina · 07-13-2012, 10:42

please. u can help me, i know rebaling etc but some problem very hard/no success in this time {1. volt in section, 2. charging problem} . or other tips or trick . can u help me ok. my add timilsinabishnu30@ yahoo.com
any buddy know nheru place(Delhi) ho is give him very low price laptop parts (amd,nvidia, intel chips etc eqipment)

09-30-2010, 08:00	#48 (permalink)
alexlaboratory No Life Poster Join Date: May 2008 Location: Hell and beyond Posts: 954 Member: 771230 Status: Offline Thanks: 367 Thanked 937 Times in 422 Posts	This solder Station its the biggest pice of rubbish I ever use in my life this crap ain't worth 5 cents sorry to say such bad feed back but its true I fact i got so upset I chuck it in the rubbish!! note: infra red solder station are absolute useless regardess manufacture or model. That's why HAKKO or JBC dont use infrared crap. Also to Raheeeb I know you trying to help people using this machine.................Look if you ever in melbourne australia and you want to see un engenier using proper techniks, procedure and tools on smd soldering just came to my small lab and I will open your eyes!! Last edited by alexlaboratory; 09-30-2010 at 08:09.

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09-21-2010, 00:33	#46 (permalink)
Dan Collins Moderator Join Date: Jan 2007 Posts: 207 Member: 437621 Status: Offline Thanks: 6 Thanked 18 Times in 14 Posts	Raheeeeb, Took a look at your profile. I cannot get any heat from the upper heater if I set it to level 7. As a matter of fact, I haven't had any success with getting heat within the profile times until I set the upper heater set to 2 and also lower the board holder to get the board closer to the lower heater. Now I can complete a profile in about 5 minutes. Maybe my heaters don't get as hot as yours because I use a 220v-120v 2000 watt converter If you apply heat for too long to a board it will damage it.

09-30-2010, 07:37	#47 (permalink)
Raheeeeb No Life Poster Join Date: Oct 2001 Location: -------- Age: 44 Posts: 1,011 Member: 7062 Status: Offline Thanks: 0 Thanked 118 Times in 37 Posts	Sorry! what you mean by level 7 , you mean my guide for using upper heater to accelrate the prehaeting or else ? Sure, too long process and using much heat damage the pcb and the IC.

10-01-2010, 09:47	#49 (permalink)
MISTER_CHIP Junior Member Join Date: May 2009 Location: Spain Posts: 25 Member: 1041552 Status: Offline Thanks: 5 Thanked 3 Times in 3 Posts	Please test this thread Reballing • Ver Tema - [DESMONTANDO] Los mitos de JOVY (VIDEOS) There the friend Wolverine manages to reballing removing ceramic machine. A greeting. __________________________________________________ ______ Por favor, test este hilo Reballing • Ver Tema - [DESMONTANDO] Los mitos de JOVY (VIDEOS) Ahí el amigo Lobezno logra hacer reballing retirando la vitrocerámica de la máquina. Un saludo.

10-01-2010, 13:04	#50 (permalink)
Dan Collins Moderator Join Date: Jan 2007 Posts: 207 Member: 437621 Status: Offline Thanks: 6 Thanked 18 Times in 14 Posts	Raheeeb, I mean the height adjustment on the upper heater. Alexlab, Usually going from hot air to infrared is more difficult because you are use to certain procedures. But take it from me, throw away all you know when using infrared or the results are what you experienced. It took me over a year to get it right, but now I can do it with a great deal of success. Pulling it out of the box and having it burn everything up is expected, I've been there. I have made so many modifications to the Jovy, you would hardly recognize it. We are all on our own out here with no help or info from the Chinese manufacturers. So that's why I always say you must have a lot of patience and do lots of research. Dan

10-30-2010, 19:58	#52 (permalink)
reply4reply Junior Member Join Date: Jun 2010 Posts: 1 Member: 1317428 Status: Offline Thanks: 0 Thanked 0 Times in 0 Posts	you guys blame the machine but you're wrong, I've been reballing laptops for a year with t870a that's half the cost of jovy and is way more basic than jovy I can buy 10 jovy's but I still use my t870a because I modified it myself, I added and took things off it to suite me. you can't reball because you're using too much heat or too little heat, the wrong flux type, the wrong flux amount ect... I can reball a gpu with a heatgun and a household light bulb from so much reballing...it took me 1 year to finally get the skills in a world of no real video tutorials, those on youtube are crap! dont follow those... I was depressed...angry but most important patient! patience is the key to a succesfull reball...I must've ruined 100 laptops before I could succesfully reball the first laptop.. be patient..its not easy reballing is really really really hard.

11-05-2010, 19:50	#53 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 369 Member: 44625 Status: Offline Thanks: 23 Thanked 35 Times in 22 Posts	@reply4reply, Could you please share more info about your findings and perhaps put up some videos of your own? B.R. Trion

11-13-2010, 13:27	#55 (permalink)
pentu Crazy Poster Join Date: Mar 2007 Posts: 59 Member: 473301 Status: Offline Thanks: 6 Thanked 11 Times in 6 Posts	Hi Trion, Next i will post Re-Balling Video of BGA IC using direct heat stencils Thanks

01-27-2011, 18:30	#58 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 369 Member: 44625 Status: Offline Thanks: 23 Thanked 35 Times in 22 Posts	@Halim_xu, Popcorn means too much heat. See the problem with most budget IR machines is we can't actually know the correct temperature of the chip. We may think for example its at 180 degrees when its actually at 205 degrees. This should be verified with another temperature probe or an infra red thermometer (available for under 50USD). The temperature settings depend on the chip being reflowed or reballed. For example in NVIDIA chips the melting temperature is 215 degrees, but some rare pieces need a slightly higher temperature. IN case of Nvidia Chips you need sufficient heat from below and not too much from above. Too much heat from above is causing the "pop corn effect". Do use some good quality flux. Here's a tip to know when you have reached the temperature for solder to melt. Find some small capacitor or resistor next to the GPU you are working on. Use a metal tool like a dentist's dental pick to move the component around the temperature you think it should melt (183 deg for lead based, 215 for lead free). Once it moves, its the right temperature. For lead free solder avoid going higher than 230 degrees as it can damage the chip permanently. You can re-solder the small part later. Another suggestion is find someone in your area who can show you how to use the machine. Once you see the process you'll have an idea. And also every machine for IR rework that's not costing 10,000 USD and above is unique and needs you to learn its particular settings. That's why profiles may not be that useful. Always preheat the board at least up to 80 degrees and then start the rework. Watch videos by others and get some ideas. B.R.

07-10-2012, 02:07	#59 (permalink)
Dan Collins Moderator Join Date: Jan 2007 Posts: 207 Member: 437621 Status: Offline Thanks: 6 Thanked 18 Times in 14 Posts	Some interesting systems there. Bet the price is intersesting too. Give us a clue.

07-13-2012, 10:42	#60 (permalink)
bishnutimilsina Freak Poster Join Date: Oct 2008 Posts: 170 Member: 878028 Status: Offline Thanks: 29 Thanked 13 Times in 11 Posts	please. u can help me, i know rebaling etc but some problem very hard/no success in this time {1. volt in section, 2. charging problem} . or other tips or trick . can u help me ok. my add timilsinabishnu30@ yahoo.com any buddy know nheru place(Delhi) ho is give him very low price laptop parts (amd,nvidia, intel chips etc eqipment)