Matrix Orbital Corp

I screwed up while connecting up some stuff and after a dismal morning debugging, I think I only blew up one component on the LCD backpack.

Unfortunately it's blown to such a degree that I can't read the frigging part number. Argh! So right now I'm dead in the water. If somebody else (or MO) can tell me what their component says, I can probably hunt down the same or similar locally.

Looking at the back of the pcb, there is an SOT-23 (or sot-323?) component all the way to the right of the board. It's just to the left of the LCD connector, between pins 11 and 9. It's the rightmost SOT-23 (323) component, has 2 resistors directly below it and 1 resistor directly above it.

If anybody can check this out I'd REALLY appreciate it. Twiddling my thumbs on my day off. *sigh*

Thanks!

If it's above the DB-9 Connector, then it's a RS232 Chip... Sipex SP232AEN.

Or the 2A PNP transistor, model 3906

On 2002-09-30 14:00, Henry wrote:
If it's above the DB-9 Connector, then it's a RS232 Chip... Sipex SP232AEN.
Or the 2A PNP transistor, model 3906

The 3906 it is. I should've figured. I've used almost the same circuit myself. Doh.

Hmmm... Is the 2A a brand? Searching for 2A PNP 3906 of course finds a million 2 AMP 3906 transistors but nothing in a SOT package.

Can you provide any more info?

Thanks.

The 2A is just a manufacturing part number, just worrie about the 3906 PNP.

Great. Thanks. Looks like all the SOT-23 3906's actually use the same pinout. That's a shock for SMT stuff.

Wish me luck. Well, maybe not too much luck, I need an excuse to get the new 20x4 White/Blue display. :-)

Almost there! I actually had 20 SMT 3906's that I got as a sample and it took no time to replace.

Unfortunately it appears I also blew the capacitor that is right below the transistor. Do you know what value that capacitor is supposed to be?

Thanks again!

0.22uF