Hair Iron Heater

Thread Starter

R!f@@

Joined Apr 2, 2009
9,734
I like to reverse Engineer this







So who's gonna help me ?:cool:

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
 
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Thread Starter

R!f@@

Joined Apr 2, 2009
9,734
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..!
 
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Thread Starter

R!f@@

Joined Apr 2, 2009
9,734
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.
 

Sparky49

Joined Jul 16, 2011
833
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?:)
 

thatoneguy

Joined Feb 19, 2009
6,359
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?
 

Thread Starter

R!f@@

Joined Apr 2, 2009
9,734
The unexpected happened.

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

Interesting..:D



BAAAANG !

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


 

Thread Starter

R!f@@

Joined Apr 2, 2009
9,734
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..
 

Thread Starter

R!f@@

Joined Apr 2, 2009
9,734
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?
 

thatoneguy

Joined Feb 19, 2009
6,359
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?
I figured you'd have a schematic done by now. :D
 
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