Can you show the other side? Also, have you tried replacing the barrel power connector? It's a switched connector so if it's effed up it can cut off both battery and external power.
]]>The SK-10 doesn't have a headphone jack, just the speaker-- which as far as I can tell is working (wiring it up to a battery gets you the expected cracks and pops)
]]>Does the power LED light? Have you tried the out jack as well as the speaker?
]]>I've not thought about the power connector, but the multimeter is reading it properly, even when batteries are in, the correct pins are 7.5v/gnd.
Power is definitely getting to all the chips, I've traced it all over the board! Not sure where it's getting lost.
]]>Can you show the other side? Also, have you tried replacing the barrel power connector? It's a switched connector so if it's effed up it can cut off both battery and external power.
]]>The darlington I got (TIP120) came BCE in the package though, so no bending necessary!
]]>I threw whatever NPN I had laying around yesterday, but went out and bought the proper darlington this morning-- still to no avail! I've tried both means of power, but neither will get it going 
I wired a switch in place of the old one, because the contacts were a little corroded (those are the red and white wires), I thought that might be the issue... Still nothing. Also, the trace for the via on the base of the diode gave, so you'll see there's a little bridge connecting it to the next point.
Oh boy.. What a mess.
These are lame pics, but I don't have my nice camera atm... I'll take better ones tomorrow if needed!
Also, completely, totally, not even remotely related, but I had some stickers of yours I put on a lighter years ago. It's still one of my favorite things ever lol!
OKAY, anyway... Thank you for the help!!
]]>...and I'm assuming you're absolutely certain the two transistors have the same pinout... ...and that you've tried both batteries and a wall wart...
I've been tinkering with this SK-10 I picked up at a yard sale a few days ago. I was hoping to bend it this weekend, but instead have wrestling to get it to power on!
After trying fresh batteries and a 7.5v AC adapter, I opened it up. Nothing looked unusual, but after a nice cleaning I still wasn't getting any response from the keyboard.
I've followed the power voltage, and I'm pretty sure it's as it should be. I replaced the T1 Transistor with a similar NPN as suggested by this service manual because it was reading a bit funky-- no signs of physical damage though. (The manual is for a SK-1, but I can't find the SK-10, and the boards run relatively similar). All the caps look fine, and aside from a bit of resin on the CPU, everything looks brand new.
Any thoughts? Anyone see anything like this before? As far as I can tell, everything else seems to be working correctly.
I've done quite a bit of search and have found a few other forums with people experiencing similar problems, but never have I found any real resolution. Hopefully you guys can help me get this one working, any advice would be very appreciated! I'll be sure to update with any progress.
Thanks!
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