Hi Tim

So it is a power supply out of a Sun Microsystems SPARC Classic computer.

the PowerSupply is marked as follows on the outside
Sun P/N 300-1101-01 Rev A
Model: PEX643-30
Made by FDK Fuji Electrochemcical Co Ltd

The circuit board is marked with the following
PCB1750 A06-119271D

Not easy or not marked as to the parts

the transistors in questions are TO-92 and are all on the low voltage side of the switcher.

hope that provides more detail.

Cheers

Richard

On Saturday, July 13, 2019 at 9:26:55 PM UTC+10, Tim Schwartz wrote:
Richard,

It would be helpful to know the make and model of the power supply (or
the device it is part of), and the physical package of the transistors.
If you know the schematic reference (ie Q25) that would be good too.

Regards,
Tim


On 7/13/2019 6:53 AM, wrote:
Hi Folks

Having some trouble finding some transistors.

I am repairing a switch mode power supply and have a number of transistors that need replacing. The issue is I can't seem to find them online....maybe my google fu is out of whack or I have forgotten something obvious.

Any way there are 3 different types of transistors

first is marked as follows

2001
-2J

Second

2005
-2I

third
P4M
25

if anyone can help me out or point me in the right direction that would be greatly appreciated.

Regards

Richard