Amprobe AM-140-A - Manual (Page 29)

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Fuse replacement:
Loosen the 4 screws from the case bottom. Lift the end of the case bottom
nearest the input jacks until it unsnaps from the case top. Replace the blown
fuse(s) and/or the battery. Replace the case bottom, and ensure that all the
gaskets are properly seated and the two snaps on the case top (near the LCD
side) are engaged. Re-fasten the screws.