Hair Iron Heater

I like to reverse Engineer this







So who's gonna help me ?

I think I need to know the part no.'s first, Eh!.
them transistors and diodes..so I can draw the schema..NO ?

I got high res Pics..uploading them now..it will take some time.

High res links are now available.

1 2 3

 

Heh heh heh...

 

Keep giggling..

Once I draw a schema out of it and showed it to ya, you would want to build something similar.

It's how the heat is controlled I am interested in.

U see, this thing takes 220VAC and regulates the heat of the plates without feed back and it is done through a SCR.

This is what interests me.

I blew the SCR, the wires shorted due to insulation wear. That's why I took it apart but always been interested in studying it..so here's my chance.
First I need to replace the SCR and take some voltages..


OK..since I lost most of my PDF files you guys gave me..
I like to know what the SMD transistor no.s are.
Can any one decipher the part no. ?
Please..!

 

OK ..I manage to read the no. s on the transistors..

to really understand it u got to see this.

Can any one tell me what they are actually, I mean the data sheets.

 

This is really nice forum with awesome topics.
Thanks for sharing.

 

I'd like to try and help, but I cannot see the red letters on the black! Could you do it with white bold letters please?

 

I learned something new today. I thought hair irons just had a cheap
bimetallic thermostat in them.

 

How about now

 

Which pins are the input voltage, which are the output to the heater element?

The white/yellow device, soldered to both ends that sticks out, is that a thermal fuse or a thermistor?

 

The unexpected happened.

The comparator chip blew when I gave power after putting a new SCR.

Interesting..



BAAAANG !

The picture has solder jumpers. Don't get hasty.. Pictures were taken during the de-soldering !

 

Pads near the switch is the Input and the fuse is a 2A one

and for ur info...it blew right to my face..that was something worth seeing..

 

Did the old SCR test bad?

What is the comparator comparing, if you've figured out the operation of it yet...

 

Operation ?

If I tell you that the old SCR has Split. Would you believe that it is bad.
And I do mean literally...

To figure out anything I need to know the transistor part no.'s ...don't you think?

 

A little super glue should fix you right up.

 

I figured you'd have a schematic done by now.

 

Heck no. not yet..

Too busy with the riot that is going on in here