Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Equipment Usage, Soldering, Techniques, and Reviews
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 09-23-2022, 12:10 PM   #1
corrize
Badcaps Veteran
 
Join Date: Apr 2021
City & State: Paris
My Country: France
I'm a: Knowledge Seeker
Posts: 218
Default 858D hot air station provide air at 200 degree instead of 500

Hello, I noticed that was become almost impossible to desolder component with my hot air station. I measured with meter : air at output is at 220 degree celsius max, even set at 500 degree. So something is bad. Maybe temperature probe inside ?
Not yet disassembled, have you see some ę well know Ľ ou frequently issues to this sort of tools pls ?
corrize is offline   Reply With Quote
Old 09-23-2022, 12:24 PM   #2
stj
Great Sage 齊天大聖
 
stj's Avatar
 
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 28,389
Default Re: 858D hot air station provide air at 200 degree instead of 500

post a picture of the board, i have some schematics
stj is offline   Reply With Quote
Old 09-24-2022, 12:22 AM   #3
diif
Badcaps Veteran
 
Join Date: Feb 2014
City & State: Midlands
My Country: England
I'm a: Professional Tech
Posts: 6,656
Default Re: 858D hot air station provide air at 200 degree instead of 500

Inspect the heating element when it's on. I must have knocked my nozzle as the element had become a little tangled and wasn't heating evenly/fully.
diif is online now   Reply With Quote
Old 09-24-2022, 04:02 AM   #4
corrize
Badcaps Veteran
 
Join Date: Apr 2021
City & State: Paris
My Country: France
I'm a: Knowledge Seeker
Posts: 218
Default Re: 858D hot air station provide air at 200 degree instead of 500

I disassembled and there is nothing inside. The box seems good. The issue come probably from gun. That could be the heating element indeed, I will check that.
Attached Images
File Type: jpg 20220924_111524.jpg (521.5 KB, 49 views)
File Type: jpg 20220924_111642.jpg (596.8 KB, 43 views)
File Type: jpg 20220924_111931.jpg (909.5 KB, 37 views)
corrize is offline   Reply With Quote
Old 09-24-2022, 08:17 AM   #5
corrize
Badcaps Veteran
 
Join Date: Apr 2021
City & State: Paris
My Country: France
I'm a: Knowledge Seeker
Posts: 218
Default Re: 858D hot air station provide air at 200 degree instead of 500

I disassembled the gun, nothing obvious.

I see a bimetal, probably good. Thermal probe taped with heating element.
That could be wire of eating element touching other and reduce heating capacity ?
Attached Images
File Type: jpg 20220924_152038.jpg (848.9 KB, 20 views)
File Type: jpg 20220924_152048.jpg (734.0 KB, 14 views)
corrize is offline   Reply With Quote
Old 09-24-2022, 08:19 AM   #6
stj
Great Sage 齊天大聖
 
stj's Avatar
 
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 28,389
Default Re: 858D hot air station provide air at 200 degree instead of 500

when you turn it on, do you see the temperature rise on the display?
if yes then it could be the feedback circuit.
(we can check that with a soldering iron)

also, look at the aviation connector contacts - those connectors arent really rated for this type of power
stj is offline   Reply With Quote
Old 09-24-2022, 08:23 AM   #7
stj
Great Sage 齊天大聖
 
stj's Avatar
 
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 28,389
Default Re: 858D hot air station provide air at 200 degree instead of 500

on the board under c3 is a transistor or something - has it got a hole in it or is it the camera?
stj is offline   Reply With Quote
Old 09-24-2022, 09:36 AM   #8
corrize
Badcaps Veteran
 
Join Date: Apr 2021
City & State: Paris
My Country: France
I'm a: Knowledge Seeker
Posts: 218
Default Re: 858D hot air station provide air at 200 degree instead of 500

I checked, itís factory mark, not a hole. The temperature rise on the display. I canít check the connector, the front cover is very hard to remove. I canít pull button.
I donít know electronic for heat. It is alternat voltage feeding the gun ? And whatís increase the heat when I turn the button, voltage or current ?
Attached Images
File Type: jpg 20220924_165004.jpg (459.8 KB, 25 views)
corrize is offline   Reply With Quote
Old 09-24-2022, 10:39 AM   #9
stj
Great Sage 齊天大聖
 
stj's Avatar
 
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 28,389
Default Re: 858D hot air station provide air at 200 degree instead of 500

the heater is mains voltage 230v, the heat is controlled by the board pulsing the power and an ajustable speed.
stj is offline   Reply With Quote
Old 11-09-2022, 10:43 AM   #10
harp
Senior Member
 
harp's Avatar
 
Join Date: Jun 2022
City & State: 45.2,14.4
My Country: Planet Earth
Posts: 154
Default Re: 858D hot air station provide air at 200 degree instead of 500

Check resistance of disconnected heater element, and compare measurement with same end on pcb board. Maybe some wire connection has loose and warming up.
Resolder all pins of triac and tracks from mains to heater on pcb, make it flooded with solder.
harp is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums © 2003 - 2023
Powered by vBulletin ®
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 10:44 AM.
Did you find this forum helpful?