Stu's 1000 post Xers, Inspection, fix, test and ship.

[jbeckva]

Well, it's a cap. No skeezer tho eh?

No wait.. which one got sucked?? Was looking at C47

 

[laatsch55]

That was the Before pic er. Always do that just because. It was one of the resistors that has to go anyway. I just have no idea how to order what size. are they all 1/8 watt, 1/4 watt?????

 

[laatsch55]

And the old fart knew THIS, I BET HE'S IN HIS RECLINER , 700 PEGGED OUT LHAO!!!!!

 

[jbeckva]

Hmmm... I'd go with the web selector app on either Mouser or Digikey first, then work your way down to the SMT resistors and compare physical dimensions to what's on the datasheets. I'm guessing that they're probably 1/10 watts (seems the majority are), but the best way is to browse through the pages and compare physical dimensions on 'em first. The mounting technic appears to be the same i.e. tiny square metal strips on either side, that you just flow a tiny bit of solder over to have 'em "stick".

Seems the part numbers follow a good pattern too, just like the old fashioned stuff... Here's one..

ERJ-3GEYJ330V

Important part is the 330, 33 + (no/0 multiplier) = 33 ohm. You should be able to find the right value.

 

[laatsch55]

Thanks Jer. Smallest thing I've messed with is a 4148.

 

[laatsch55]

One done and waitin on parts, sorry Stu, I was " totally SMD resistorless". Gonna be no coffee drinkin the day we put these back!!

 

[stuwee]

This is cool of you to do all the pics, interesting little buggers ain't they?

Did you think to open up the other one to look for that # you want to find?

This is great, I'm sooooo excited

 

[laatsch55]

What number??

 

[stuwee]

That was the Before pic er. Always do that just because. It was one of the resistors that has to go anyway. I just have no idea how to order what size. are they all 1/8 watt, 1/4 watt?????

What you said above^^^^^^^^

 

[laatsch55]

Oh.............

 

[stuwee]

You a funny old man! Huh? What? Oh!

Doh!!

 

[laatsch55]

perty funy fer a hick......

 

[speakerman1]

What the heck is a SMT? Are you trying to say I have 100 of the wrong resistors?

Larry

 

[laatsch55]

Yep, SMD Surface mount devices,

 

[laatsch55]

Ok, got all my work pics posted, now , I unpacked another Xer, its now going to the "Pit of Despair", anpother Princess Bride reference. soon as my Eico warms up the x-er geets LOOOOOOOOAD TEEEEEESTED.

 

[laatsch55]

HMMMMMMMMMM................ out of the first 5 , 4 would not power on and the fifth had severe power supply problems.

 

[Web Police]

Ding Ding Ding, you found one weak spot.

 

[laatsch55]

Ok, so they're switching power supplied, If irc , switchers require a load, so loaded it up, got a usable scope trace. The man was right, BIG GAIN problem, the response is all over the map. I think the gain is so great BEFORE the chip, its in and out of protect mode 3-400 times a second. Is that possible???

 

[stuwee]

This sounds scarey

 

[laatsch55]

I did get a stable 30.56 volts with an 8 ohm load at 3, 567 hz. didn't last long and had to be on the sig generator output to keep it there. I think I'll bypass the input buffer and try again.

Power= voltssquared/ resistance
Power= 30.56x30.56=933.31/8= 116.74 watts.