Hey,
I just desoldered all the electrolytic caps with a hot air reflow tool. No lifted pads, everything looks good. I'm quite sure that there's no damage to the copper traces and interlayer connections surrounding the caps. The board has been washed and dried twice now, one run with a mild alkaline (?) cleaning agent followed by tap water, second run with isopropanol to draw out any moisture left.
I found out that I just ran out of "classic mac recapping tantalums". Then I was about to solder in the tantalum caps I still had in stock from a camcorder repair, when I suddenly noticed that they were 47µF, but only 10V
. I'll order the correct tantalum caps tomorrow, so recapping has to wait 
.
When the caps have arrived, I'll warm up my trusty old Tektronix scope and I'll poke around the UI6 IC. But let's keep our fingers crossed that the SE/30 will fire right up with new caps and further troubleshooting won't be necessary. I don't think so, but we'll see
.
Wally, thanks a lot for your very detailled support so far! Sadly (or not so sadly), my other SE/30s are alive and kicking, thanks to recapping, so I'll have trouble finding a replacement part if UI6 is the root of all evil. But knowing the fault would give me the opportunity to fix the fault in the future when I get my hands on a replacement part.
Greetings from Germany!
I just desoldered all the electrolytic caps with a hot air reflow tool. No lifted pads, everything looks good. I'm quite sure that there's no damage to the copper traces and interlayer connections surrounding the caps. The board has been washed and dried twice now, one run with a mild alkaline (?) cleaning agent followed by tap water, second run with isopropanol to draw out any moisture left.
I found out that I just ran out of "classic mac recapping tantalums". Then I was about to solder in the tantalum caps I still had in stock from a camcorder repair, when I suddenly noticed that they were 47µF, but only 10V
.When the caps have arrived, I'll warm up my trusty old Tektronix scope and I'll poke around the UI6 IC. But let's keep our fingers crossed that the SE/30 will fire right up with new caps and further troubleshooting won't be necessary. I don't think so, but we'll see
.Wally, thanks a lot for your very detailled support so far! Sadly (or not so sadly), my other SE/30s are alive and kicking, thanks to recapping, so I'll have trouble finding a replacement part if UI6 is the root of all evil. But knowing the fault would give me the opportunity to fix the fault in the future when I get my hands on a replacement part.
Greetings from Germany!