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Lisa 2/10 230V PSU jumper settings

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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)

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.

applefreak:
http://appleclub.pl/wp-content/uploads/2018/04/DSCF3440.jpg


Only one , near AC in

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?

patrick:

--- Quote from: ried on January 27, 2024, 08:00:10 pm ---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?

--- End quote ---
It is in a parking position. It used to be connected to E7 for 115V operation and now, after conversion to 230V, it is dangling. The left jumper was connected to E8 for 115V and has now been moved to E7. This puts both transformer windings in series for 230V operation. Before, for 115V, they were in parallel.

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