Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default CCFL-inverter iMac 20"

Den måndag 20 april 2020 kl. 20:37:14 UTC+2 skrev Bo-Lennart:
Hi all out there.
I got an old iMac 20 inch from 2007, with no backlight.

I open up the iMac and found the inverter.
The inverter is made by DARFON, TW.
The modell is: 4H.V2471.001

I check the transistor, diods and so on.
I found 2 suspect transistors.Q2 qnd Q4. Two SOT-23. They are labeled: RKM35, I don't know if it's a NPN or PNP or even a mosfet.
Is there some one that have worked with this inverter, I mean in component-level.
I mailed DARFON, but I got a reply from postmaster, saying that they could't deliver my mail, becouse DARFON inbox is full.
Mybee they went out of busnees, and forgot to close the mail-accont.

I would appriciate any help from You.

Bo-Lennart Karlsson
Falun, SWEDEN


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