Okay, I'm ready for some help. The output is completely dry. Inspected and reflowed all (I think!) the pads. LED varies in intensity and rate as expected. I swapped the 3007 for a tested one, but only have the one 3101 on hand. The voltages seem funny on 2 and 4. Any suggestions? I'll post some pix in a bit.
TL062
1: 0.67 - 8.5
2: 4.4 - 4.8
3: 2.5 - 6.4
4: 0
5: 4.4 - 4.8
6: 4.8
7: 2.5 - 5.6
8: 9.19
JRC4558D
1: 6.83
2: 6.83
3: 6.83
4: 0
5: 6.83
6: 6.83
7: 6.83
8: 9.19
MN3101
1: 9.19
2: .001 ??
3: 0
4: .001 ??
5: 0.67
6: .001
7: 6.5
8: 1.2 drifts towards 0
MN3007
1: 9.19
2: .001
3: 6.09
4: 1.2 drifts towards 0
5: 0
6: 6.53
7: 6.83
8: 6.83
(http://imageshack.com/a/img513/5926/a0tp.jpg)
(http://imageshack.com/a/img844/4395/usqv.jpg)
Pay no attention to the disconnected in/out wires...
Do you have a probe? Are you getting output on the BBD?
Jacob
I very much doubt it as it has no clock to work with.
You were right to suspect the MN3101, it's way off, rest looks fine.
Yup - and damn.
Dale mil-spec resistors
Wima box caps
Sprague caps
milled sockets
Highend replacement for the tl062...
And none of us managed to use sockets on the trannys when we built them. Get a replacement MN3101 and she should fire right up!
What are the resistors that look like Dales but have the regular bands on them? Are those also Dales?
I think? This thing is (almost)ready for war! I like it. I prefer cheaper parts than he's chosen here but man it's nice.
Those are Dales too. They're not too pricey in quantity from Mouser and/or Allied. I usually figure parts for the most part are pretty cheap compared to the time spent building. Although I did try to go cheap-ish on the ICs. Got both the MNs from Doctor Tweek in the UK. I've ordered a 3101 from SB now lol...we will see what happens! Thanks all.
Last ditch effort...
From the looks of your pics, it looks like your 3101 is not fully seated in the socket. Especially the Pin 1-4 side. Look there.
Also... since it is presumed dead anyways... try lifting Pin 4 of the 3101 out of its socket and reinsert with all the other pins making contact and see if you get anything. I once had a problem with a CE2 build and I read somewhere that lifting Pin 4 of the 3101 could fix it..... and it did!
Give these both a try and let us know. ;)
EDIT: Yes... Scruffie is correct below. It is Pin 8 of the 3101. Try lifting Pin 8.
I didn't mean to imply the chip was definitely dead, merely that's where the issue lies so yes give lacky's ideas a go, I too remember the pin lifting 'trick' but I don't think it was pin 4 as that's a clock pulse we need... not sure which pin it was... probably 6, 3 or 8.
And you've checked it's all soldered nicely? I did wonder about pin 8 dropping, that should be the V.Ref pin so I wonder if C12 is soldered correctly too or if it is just the 3101.
Fwiw, touched up C12 pads, tried lifting pins 4, 6, 3 and 8 in turn, no change.
(http://i.imgur.com/RcK8rXx.png?1)
Bad 3101 confirmed...SB to the rescue. Thanks all!
(http://www.crankyandjaded.com/img/frankenstein.jpg)
Clearly - I'm stoked for you.
Congrats!
Where do you get those awesome little sausage resistors?
They are Vishay-Dale mil-spec metal film. Got them either at Mouser or Allied. A little pricey, but there are some really good deals available at Allied in some values, and Mouser is ok if you buy in quantity.