| T O P I C R E V I E W |
| benaknoun |
Posted - 01/23/2012 : 14:57:06
Hi everyone
Finally, i have bought a hot air station for desoldering the chips, i would like to buy two hot air nozzles, one for standard 8 pins 24Cxx, 25Cxx, 93Cxx....
and one for TSOP56 TE28F640
Is this the right one?
http://www.mcumall.com/comersus/store/comersus_viewItem.asp?idProduct=4407
and which one do i need for 24Cxx ?
Thanks in advance |
| 26 L A T E S T R E P L I E S (Newest First) |
| benaknoun |
Posted - 03/25/2013 : 10:53:05
quote:
Originally posted by Bad_Ad84
I apply heat to the chips legs at the same time as lifting it gently with the dental pick. Like I said, it takes a few seconds.
OK, thanks for your help |
| Bad_Ad84 |
Posted - 03/25/2013 : 01:36:00
I apply heat to the chips legs at the same time as lifting it gently with the dental pick. Like I said, it takes a few seconds. |
| benaknoun |
Posted - 03/23/2013 : 14:14:57
quote:
Originally posted by Bad_Ad84
I answered all those questions in this thread already.
It takes about 15-20 seconds to remove the chips.
Ok thanks,
I have gone over the hole thread and yes you have answered some questions, not all.
i have deleted the questions already answered.
If you can, please answer these below, if not, thanks for your help anyway.
So you say you use the 2mm round nozzle, when I use mine, it takes a very long time and the chip does not even move! I tried many times and after 10 minutes I get fed up, I then use the 5mm nozzle and the chip comes off right away...
Do you preheat around the pins with the nozzle and for how long?
Why am I not able to desolder a SOIC8 with a 2mm round nozzle, what could be the reason?
Thanks |
| Bad_Ad84 |
Posted - 03/21/2013 : 02:22:24
I answered all those questions in this thread already.
It takes about 15-20 seconds to remove the chips. |
| benaknoun |
Posted - 03/20/2013 : 14:26:26
quote:
Originally posted by Bad_Ad84
Too much heat can cause the pads too lift.
I use the 2mm nozzle for pretty much everything.
I use the dental pick to VERY GENTLY lift the chip. like hardly any force at all, when the chip is ready to come off - you barely need to touch it for it to move.
Ok thanks.
So you say you use the 2mm round nozzle, when I use mine, it takes a very long time and the chip does not even move! I tried many times and after 10 minutes I get fed up, I then use the 5mm nozzle and the chip comes off right away...
How long does it take you to desolder a SOIC8 with the 2mm nozzle?
Do you preheat around the pins with the nozzle and for how long?
Which temperature do you use?
How far high do you hold the nozzle from the pins, 1cm?
Why am I not able to desolder a SOIC8 with a 2mm round nozzle, what could be the reason?
Sorry about all these questions...
I appreciate your help
Thanks |
| Bad_Ad84 |
Posted - 03/20/2013 : 03:59:31
Too much heat can cause the pads too lift.
I use the 2mm nozzle for pretty much everything.
I use the dental pick to VERY GENTLY lift the chip. like hardly any force at all, when the chip is ready to come off - you barely need to touch it for it to move. |
| benaknoun |
Posted - 03/19/2013 : 16:20:06
quote:
Originally posted by Bad_Ad84
I use the same nozzle for pretty much everything. If you lifted pads on a SOIC8 - you were too impatient. Do not force the chip, just heat it up until you can poke it with a dental pick and it move. It should come off easily.
Hi Bad_Ad84
This SOIC8 was a chip i already removed successfully, and resoldered it with no problems, then i had to desolder it again, and that's when the pads came off.
Is it because i applied too much heat? not enough heat? or too much lifting pressure? i would like to know the reason so i don't do it again..
Also, using the air nozzles never work, with the SOIC8 nozzle i can't desolder the chip, even if i use it for 10 minutes, i always have to use the round nozzle.
Using the round nozzle, 2mm, doesn't work either, i have to use the 5mm round nozzle.
Which one do you use please?
Also, when you use the dental pick, do you lift the chip and at the same time heat it up? or do you heat it up properly then use the dental pick?
Thanks for your help |
| Bad_Ad84 |
Posted - 03/18/2013 : 05:42:34
I use the same nozzle for pretty much everything. If you lifted pads on a SOIC8 - you were too impatient. Do not force the chip, just heat it up until you can poke it with a dental pick and it move. It should come off easily. |
| benaknoun |
Posted - 03/17/2013 : 17:00:05
Hi guys, thanks for your help.
It worked ok as you advised me to do on the TSOP 56, one side at a time with a round 5mm nozzle.
I tried the correct nozzle to desolder SIC8 and nothing, it won't work!
Can someone tell me what i'm doing wrong with this nozzle?
I had to use the round 5mm nozzle as with my 2mm round nozzle it didn't work either.
I ended up breaking the pads and i'm gutted!!
Please give some advice
Thanks |
| benaknoun |
Posted - 05/03/2012 : 08:04:02
quote:
Originally posted by Bad_Ad84
You shouldnt just use other peoples settings.
Start low and increase until it works for you. I suggest testing on a dead board, as if you set things too high you will burn the PCB.
OK thank you for the advice
Regards |
| Bad_Ad84 |
Posted - 04/29/2012 : 23:11:33
You shouldnt just use other peoples settings.
Start low and increase until it works for you. I suggest testing on a dead board, as if you set things too high you will burn the PCB. |
| benaknoun |
Posted - 04/28/2012 : 15:00:29
quote:
Originally posted by Bad_Ad84
1mm is wrong, more like 1-2CM
Really??
I was told by an electronic engineer to place the nozzle 1mm away from the chip pins.
I guess he was wrong then?
I should try with your setting of 1cm and see what happens.
My hot air flow settings are numbers, should I set it to 3rd or half the maximum setting?
Is that right?
Thanks guys for your help so far |
| ZLM |
Posted - 04/27/2012 : 00:08:13
I agree with Bad_Ad84.
My temperture set to 350C and aireflow to 5. |
| Bad_Ad84 |
Posted - 04/26/2012 : 23:13:02
I dont use a preheater.
Heat depends on airflow. Higher airflow needs more heat.
I have mine set to about 300c and airflow of 3 (out of 10).
But you will need to set what works for your setup.
1mm is wrong, more like 1-2CM |
| benaknoun |
Posted - 04/26/2012 : 15:10:44
quote:
Originally posted by Bad_Ad84
quote:
Do you use a small round nozzle on one side a t a time ?
Thanks for your help
yes, using a dental pick to lift the chip
Hi
Which temperature do you use on the hot air station?
And if you use a preheater, which temperature do you set it to?
Thanks again for your help |
| benaknoun |
Posted - 04/26/2012 : 15:07:55
quote:
Originally posted by ZLM
It should work. The nozzel does not need exact same width with chip. You need have some space between chip and the nozzel. The hot air will cover TSOP56 pins.
Hi ZLM
I have been told the space between nozzle and pins needs to be 1mm, is this correct ?
I am using a preheating station, do you know which temperature i should set it to ?
Thanks |
| ZLM |
Posted - 04/24/2012 : 22:08:28
It should work. The nozzel does not need exact same width with chip. You need have some space between chip and the nozzel. The hot air will cover TSOP56 pins. |
| Bad_Ad84 |
Posted - 04/24/2012 : 13:15:17
quote:
Do you use a small round nozzle on one side a t a time ?
Thanks for your help
yes, using a dental pick to lift the chip |
| benaknoun |
Posted - 04/24/2012 : 10:40:38
This is what i mean by not covering all the pins
I hope the photo loads up ok !
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| benaknoun |
Posted - 04/24/2012 : 10:36:47
quote:
Originally posted by Bad_Ad84
I use the smallest nozzle that came with my hotair station and have no problems. And thats doing 1 side at a time moving across the pins.
Hi
Are you talking about the TSOP56 ?
Do you use a small round nozzle on one side a t a time ?
Thanks for your help |
| Bad_Ad84 |
Posted - 04/02/2012 : 22:37:39
I use the smallest nozzle that came with my hotair station and have no problems. And thats doing 1 side at a time moving across the pins. |
| benaknoun |
Posted - 04/02/2012 : 05:30:47
Hi
The TSOP hot air nozzle does not cover all 28 pins on each side, making it very difficult to desolder the chip, having to move the nozzle across the pins loses heat...
Does anyone know where i can buy a nozzle that covers all the pins of this flash TSOP56 chip ?
Thanks
|
| benaknoun |
Posted - 02/04/2012 : 04:08:57
quote:
Originally posted by ZLM
yes. Those are standard size. It can fit 21~24mm hot gun.
Thanks ZLM
I have ordered the 2 nozzles and 2 other items, i hope to receive them soon
Thanks |
| ZLM |
Posted - 02/03/2012 : 22:08:48
yes. Those are standard size. It can fit 21~24mm hot gun. |
| benaknoun |
Posted - 01/24/2012 : 09:06:23
Hi
Thanks for your help
My hot air gun is 22mm diameter, will these fit ?
Thanks |
| ZLM |
Posted - 01/23/2012 : 22:58:48
Yes. This one is for your TSOP56 TE28F640:
http://www.mcumall.com/comersus/store/comersus_viewItem.asp?idProduct=4407
The SOIC8 nozzel is A1131:
http://www.gqelectronicsllc.com/comersus/store/comersus_viewItem.asp?idProduct=4452 |
