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Go Back   GSM-Forum > GSM & CDMA Phones Hardware Repair Area > Hardware Equipments for GSM > RE-7500 Reworking System & iSolder

RE-7500 Reworking System & iSolder the Infrared Reworking System - Product By Jovy Systems. & iSolder the intelligent soldering machine

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Old 06-05-2009, 00:22   #46 (permalink)
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Gráphics on RE-7500


Days I have been trying to set a profile and can not succeed. These are my charts and the ramp can not be adjusted better.

[img] http://img37.imageshack.us/img37/727...csfernando.png [img]

This is the graph of another colleague who has Jovy RE-7500:

[img] http://img411.imageshack.us/img411/3...sjvyjuanjo.png [img]

I do not work well this RE-7500

Best Regards
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Old 06-07-2009, 21:55   #47 (permalink)
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Besides charts, show us videos or at least pictures of how you are adjusting heater height and positioning the temperature probe.
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Old 06-07-2009, 21:58   #48 (permalink)
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When i was new to the machine, i too had similar problems, then i learnt i was using the wrong heater height. Probe placement also affects reading. Do bend the tip the way jovy shows and place it next to the chip being soldered/desoldered on the PCB.
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Old 06-08-2009, 10:13   #49 (permalink)
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The great xbox 360 reflow/reball debate!

OK guys, the problem we have here with these cheaper rework machines(i.e. jovy 7500) is the size of the bottom heater (i.e. about 160 X 160), in order to repair a large bga chip( gpu or cpu) on the xbox 360, you need a pre-heater that covers the full motherboard, what happens with these cheaper machines is that in the process because of the thickness of the pcb and material its made from and with a small pre heater, the board 'domes up' where centre of base heater is in relation the bga chip at 200 deg c plus(we need higher temp with unleaded), this causes very uneven contact on bga chip and if you get a successful reflow then its more luck than anything else, also the profile graphs I have seen on this forum for the jovy will never work for un-leaded reflow/ rework WHY? its simple the graphs show max temp at the probe of below 200 deg c, and at what temp does unleaded reflow? check your data sheets :-) , the only way you will get a result with these cheaper machines is to remove BGA chip, clean it up etc and then re-ball with leaded solder balls/paste with this we can use the profiles <200deg c possible, so in my eyes its up to jovy to provide larger pre-heater for unit. The jovy 7500 is a very good machine for the money don't get me wrong it can do a lot of good work on pcbs and is well supported, but I don't think its OK for xbox 360, can you prove me wrong?
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Old 06-08-2009, 10:23   #50 (permalink)
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jovy videos

Hi Guys, I have just watched the videos on the links shown previously in this forum, the xbox gpu reflow is not an xbox 360 gpu, if you notice all the reflow temps on these videos occur at 185 deg c, this concludes that the solder is LEADED, what we need from jovy is a video of a successful xbox 360 gpu/cpu reflow, this will never occur at 185 deg c because xbox 360 has unleaded solder!
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Old 06-09-2009, 09:27   #51 (permalink)
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Reballing Kit by JOVY

The Reballing Kit JOVY is false and useless.

Why not have a Spanish-speaking forum JOVY SYSTEMS?

Best Regards.
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Old 07-28-2009, 02:09   #52 (permalink)
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What system if not Jovy do you recommend?

Quote:
Originally Posted by gixxer_gixxer View Post
OK guys, the problem we have here with these cheaper rework machines(i.e. jovy 7500) is the size of the bottom heater (i.e. about 160 X 160), in order to repair a large bga chip( gpu or cpu) on the xbox 360, you need a pre-heater that covers the full motherboard, what happens with these cheaper machines is that in the process because of the thickness of the pcb and material its made from and with a small pre heater, the board 'domes up' where centre of base heater is in relation the bga chip at 200 deg c plus(we need higher temp with unleaded), this causes very uneven contact on bga chip and if you get a successful reflow then its more luck than anything else, also the profile graphs I have seen on this forum for the jovy will never work for un-leaded reflow/ rework WHY? its simple the graphs show max temp at the probe of below 200 deg c, and at what temp does unleaded reflow? check your data sheets :-) , the only way you will get a result with these cheaper machines is to remove BGA chip, clean it up etc and then re-ball with leaded solder balls/paste with this we can use the profiles <200deg c possible, so in my eyes its up to jovy to provide larger pre-heater for unit. The jovy 7500 is a very good machine for the money don't get me wrong it can do a lot of good work on pcbs and is well supported, but I don't think its OK for xbox 360, can you prove me wrong?
What system, if not Jovy do you recommend, or for that matter what pre heater?
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Old 07-30-2009, 18:34   #53 (permalink)
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gixxer_gixxer has only seen videos. I have repaired equipment with this machine and its a source of income for me. It indeed is well capable of reflowing Lead free PCBs without warping the boards or damaging chips. I have repaired Xbox 360s and HP DV 2000, 6000, 9000 sries laptops besides Compaq V 3000 series laptop boards where the NVIDIA lead free GPU has to be relowed. I do this using the lead free profile in the machine. I start by running the machine on preheat for a few mins and then place the board on it. This way i start the process at around 45-50 degrees and generally i get a good reflow as per the profile. Sure it may be slightly different from the profile graph, but its ok. You need to bend the temperature probe to get proper temperature readings. Also i use AMTECH flux.

The machine's preheater is more than adequate for repairing XBOX 360s besides all other consoles, laptop and desktop motherboards, mobile phone PCBs, etc. I have fixed these with this machine.

It is true that initially it takes some time to learn to handle the machine. Its only impatient people who are whining about not being able to get it to work. They don't realize that it might be they who are doing something wrong.

Working with infra red is quite different from working with hot air. But its well worth the effort put into learning it.
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Old 11-07-2009, 02:58   #54 (permalink)
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Quote:
Originally Posted by Trion View Post
My friends, am sorry i haven't posted here in a while. The heating method as i had shown here way back is a temporary fix. As Raheeeb said, its better to reflow the joints rather than just heating the parts as i was doing. This requires higher temperatures and the process is different. In some cases its even better to reball the CPU and GPU. Kits are now available on the net for doing this. The best solution would be to remove the ICs and reball them with leaded solder paste (yes i did say lead based solder and NOT ROHS solders that cause the problem). This along with improving the cooling as give on the Llama forums besides other forums will be a more lasting solution.

Please be warned that the methods mentioned in the post above this one on the You tube videos are temporary fixes too and mainly work by putting pressure on the balls. Then as the borad starts heating and warping the board starts giving problems again that get progressively worse. The you tube works only for short periods.
even better than the llama forums ` go here after using sync and eject to get error code it will tell you which chips need reworking in its database

hope this helps
http://xbox-experts.com/errorcodes.php
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Old 11-07-2009, 03:04   #55 (permalink)
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Quote:
Originally Posted by gixxer_gixxer View Post
OK guys, the problem we have here with these cheaper rework machines(i.e. jovy 7500) is the size of the bottom heater (i.e. about 160 X 160), in order to repair a large bga chip( gpu or cpu) on the xbox 360, you need a pre-heater that covers the full motherboard, what happens with these cheaper machines is that in the process because of the thickness of the pcb and material its made from and with a small pre heater, the board 'domes up' where centre of base heater is in relation the bga chip at 200 deg c plus(we need higher temp with unleaded), this causes very uneven contact on bga chip and if you get a successful reflow then its more luck than anything else, also the profile graphs I have seen on this forum for the jovy will never work for un-leaded reflow/ rework WHY? its simple the graphs show max temp at the probe of below 200 deg c, and at what temp does unleaded reflow? check your data sheets :-) , the only way you will get a result with these cheaper machines is to remove BGA chip, clean it up etc and then re-ball with leaded solder balls/paste with this we can use the profiles <200deg c possible, so in my eyes its up to jovy to provide larger pre-heater for unit. The jovy 7500 is a very good machine for the money don't get me wrong it can do a lot of good work on pcbs and is well supported, but I don't think its OK for xbox 360, can you prove me wrong?
thats what pcb supports are there for
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Old 11-07-2009, 13:16   #56 (permalink)
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this RROD is a plague on the xbox 360. I was informed that even the Jasper models have this problem. Practically it seems that all versions have it .... no exceptions. Its time that M$ modifies the design. Reflowing and reballing will fix it for months but at the end it will return back to RROD being itself a design fault.
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Old 11-08-2009, 11:33   #57 (permalink)
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Quote:
Originally Posted by MISTER_CHIP View Post


Why not have a Spanish-speaking forum JOVY SYSTEMS?

Best Regards.
In Spain we are trying JOVY comparisons between the 7500 and ACHI machines.

we are all in: http://www.reballing.es/ and we are waiting for us there.

We need support or help with Jovy profiles. Please come in, using a translator and talk about your experiences about Reballing.

Excuse the bad translation

Best regards.
http://www.reballing.es
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Old 11-22-2009, 21:38   #58 (permalink)
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Important Video

Link is here http://www.youtube.com/watch?v=NTml3-M5D-g&NR=1

Regards to all
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Old 11-23-2009, 02:33   #59 (permalink)
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cannot upload the profiles it says invalid file type so i zip them up and it still says upload failed ` how can i upload these profiles on here ?
regards
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Old 11-23-2009, 09:23   #60 (permalink)
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Achi Working in XBOX

Quote:
Originally Posted by Raheeeeb View Post
Important Video

Link is here http://www.youtube.com/watch?v=NTml3-M5D-g&NR=1

Regards to all
I have got another interesting video:

http://www.reballing.es/viewtopic.php?f=12&t=105

Best Regards.
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