LisaList2

Advanced search  

News:

2022.06.03 added links to LisaList1 and LisaFAQ to the General Category

Pages: 1 ... 6 7 [8] 9 10
 71 
 on: January 27, 2024, 08:00:10 pm 
Started by Insanely Digital - Last post by ried
I wonder what the extra jumper wire on the E6 line is for (in OP's picture). It would seem to be a jumper connecting to... itself? On the same trace?

 72 
 on: January 27, 2024, 06:19:05 pm 
Started by Insanely Digital - Last post by applefreak
http://appleclub.pl/wp-content/uploads/2018/04/DSCF3440.jpg


Only one , near AC in

 73 
 on: January 27, 2024, 06:00:45 pm 
Started by blusnowkitty - Last post by ried
Another for the spreadsheet.

Model: A6S0300
Memory Option: A6S0304
Serial number: A3356182
Applenet number: 00102186
Manufactured: 3356

 74 
 on: January 27, 2024, 12:32:51 pm 
Started by Insanely Digital - Last post by patrick
Here is a photo of the 230 V configuration: https://upload.wikimedia.org/wikipedia/commons/1/11/Apple_Lisa_Teardown_%2816065582186%29.jpg

Both windings of the standby transformer must be in series, not parallel,  and the input of the main regulator must be configured as a bridge rectifier and not as a voltage doubler. So yes, the lower jumper is the culprit.

 75 
 on: January 27, 2024, 11:16:12 am 
Started by Insanely Digital - Last post by Insanely Digital
Could anyone please confirm for me the jumper settings for 230V for a DataPower 15A0202-000,001 power supply? I bought the Lisa in this configuration in the UK, but it had suffered a blown fuse, a vaporised trace underneath the PSU board and cracked RIFAs.

Attached is a top-down view of the power supply board with callouts for the jumpers, set in the state in which it arrived. (Please ignore that I have pulled the RIFAs and one of the tank capacitors, which was bulging on the top). Of the two jumpers at the top, only one is bridging the 230V terminals; the other jumper in this area is not connected at one end. The jumper at the bottom is bridging the "115V" terminals (YIKEES!). I cannot see any reason for this jumper to be connected for a 230V input supply. The vaporised trace and blown RIFAs are in this area of the board.

As soon as my replacement RIFAs arrive, I'll test the board with the lower 115V jumper disconnected and see what happens (although, if this is the culprit it's likely affected other components on the board). I'm just asking for confirmation of my hunch that this jumper is the culprit..

Best regards, Kevin (Insanely Digital)

 76 
 on: January 26, 2024, 12:23:32 am 
Started by ried - Last post by ried
Heads up: The new documentary by David Greelish is now available for rent or purchase on Vimeo.

https://vimeo.com/ondemand/beforemacintosh?autoplay=1


 77 
 on: January 24, 2024, 09:49:14 pm 
Started by blusnowkitty - Last post by ried
Another one to add to the sheet...

Is this a 2/5? Is the memory config on a red sticker?

Lisa 1


 78 
 on: January 24, 2024, 08:03:41 pm 
Started by blusnowkitty - Last post by compu_85
Another one to add to the sheet...

Is this a 2/5? Is the memory config on a red sticker?

 79 
 on: January 24, 2024, 07:29:56 pm 
Started by blusnowkitty - Last post by ried
Another one to add to the sheet:

Model A6SB100 - Memory A6SB108.

B08B831970575
00103924
83197



 80 
 on: January 22, 2024, 01:08:53 pm 
Started by ried - Last post by stepleton
I suppose I have some high school essays from around the same time on my Lisas too, but of course I was doing that for fun after having installed LOS myself atop the previous owner's MacWorks setup :)

Pages: 1 ... 6 7 [8] 9 10