Opening the PR-11 Power Supply



 Drill small hole in the cornor of the back cover

insert a small nail in the hole

bend the cornor of the back as shown below

bend back the (4) tabs in the case with cutters to release the back



Slide a knife under the cover

Work the knife down the cover to take it from the case.

remove the back


common fault is broken solder connection or voltage regulator


Did you check the inline fuse?



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