whoops, you did change the caps... have you tried to unplug the hard drive? also was there cap goo, when you removed the old caps in the psu? you really have to get all that cap goo, it is a conductive fluid!.
you might want to check your solder job on the se/30 mainboard as well. maybe you have a solder bridge some where... or a cap that was installed backwards. wash the mainboard... and maybe dump some IPA in the psu and then , blast both the psu and the main-board off with the air compressor. On Thu, Feb 27, 2014 at 5:10 PM, Hardware Mack <hardwarem...@gmail.com>wrote: > replace all the LV electrolytic caps. they appear bad. > All the caps on the HV caps are probably ok. > they can be bad + leaking and you would never know until you remove them. > they can be bad even if they are not leaking. > > > > > On Thu, Feb 27, 2014 at 4:38 PM, Keith Jamison < > keithjamison...@yahoo.co.uk> wrote: > >> Hi Guys! >> >> Thanks for all the tips and things to look out for. >> >> I pulled the PSU and opened it on my bench. Under a magnifying lens, I >> visually checked the solder joints I made when I replaced the caps. I >> reflowed them to be certain. I also checked that the caps were correctly >> polarised. >> >> I reassembled it apart from the metal lid and there was only the slight >> hum of the supply when I turned it on. >> >> With my meter, I recorded the following voltages against what they should >> be and again after 5minutes. Then I adjusted RV251 (V ADJ) and checked >> again. >> >> V# Pin Colour Expected Recorded After 5min After Adjustment >> V1 #4 Orange + 5V + 5.56V + 5.39V + 5.84V (Max) >> V2 #9 Orange + 5V + 5.56V + 5.39V + 5.84V (Max) >> V3 #5 Yellow +12V +14.42V +10.91V +10.92V (Max) >> V4 #10 Red +12V +13.83V +10.31V +10.53V (Max) >> V5 #6 Green -12V - 8.81V -8.11V - 8.85V (Max) >> >> (I hope the table lines up okay) >> >> By maxing out RV251, I heard the clicking sound again, more of a 4Hz or >> 5Hz rapid cheep or chirrup. >> >> The noise is coming from the LV side rather than the HV Supply side. >> Seems to be coming more from the second heatsink with the medium and small >> transformers under it. >> >> So, in summary, the PSU fires up and gives wildly out of tolerance >> readings for 3-5 minutes, then settles down to lower readings. By adjusting >> RV251, the readings cannot be made to achieve their expected values. The >> green cable does not reach the -12V output state. All of this is >> accompanied by a characteristic 4-5Hz chirrup when RV251 is turned to the >> max. >> >> Where might we go from here, please? >> >> Cheers, >> >> Keith >> >> >> >> On Wednesday, 26 February 2014, 3:15, Doug McNutt < >> dougl...@macnauchtan.com> wrote: >> At 18:39 -0800 2/25/14, Peter R wrote: >> >Sounds like you might have a short somewhere after the harnesses. >> >> Yep. Check the solder joints on the connectors that probably got >> unplugged during the work. >> >> I can't prove it but I really believe that the larger solder joints don't >> get quite hot enough during the wave soldering operation which has a bunch >> of much smaller connections to get right. >> >> >> -- >> --> The best programming tool is a soldering iron <-- >> >> >> -- >> -- >> ----- >> You received this message because you are a member of the Vintage Macs >> group. >> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our >> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml >> To post to this group, send email to vintage-macs@googlegroups.com >> To leave this group, send email to vintage-macs+ >> unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/vintage-macs >> >> Support for older Macs: http://lowendmac.com/services/ >> --- >> You received this message because you are subscribed to the Google Groups >> "Vintage Macs" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to vintage-macs+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> -- >> -- >> ----- >> You received this message because you are a member of the Vintage Macs >> group. >> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our >> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml >> To post to this group, send email to vintage-macs@googlegroups.com >> To leave this group, send email to >> vintage-macs+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/vintage-macs >> >> Support for older Macs: http://lowendmac.com/services/ >> --- >> You received this message because you are subscribed to the Google Groups >> "Vintage Macs" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to vintage-macs+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > > > -- > Charles > -- Charles -- -- ----- You received this message because you are a member of the Vintage Macs group. 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