Question about ViewSonic VX910 19" LCD Monitor
Hi, I found 2 of my CCFL drivers shorted Q6 & Q7, problem is they are SMD transistors, and they only have 4 letters written on top DK QA. I replaced them with a DK QM I had, it worked for about 24 hours but looks to me they went bad again, I can't find how to read this letters(manufacturer code), on the other hand I think the transformer is probaly shorted too. Where can I find any information on this board, a schematic or a clue on the name of this 2 transistors? Thanks Io.
One and a half year later I know the solution :-). It is 2SC4672... sure!. DKQ* is in my Jaeger SMD-Decoder book (10.000 SMD - Demiconductor - Codes)
Common problem with inverter PCB. Caused by the damaged or loose 100nF (or some same value)
Succes. For me it is working.
Posted on Feb 27, 2009
This is not a solution but I am just surprised that you have the EXACT same fault as me. I've done some searching on datasheetcatalog website and apparently the letters DK mean it is a BCX42 PNP Silicon AF and Switching Transistor (For general AF applications High breakdown voltage) however the datasheet for this device is a 3 pin smd not a 4 pin so I'm not sure that it is correct.
Posted on Sep 17, 2007
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