Power Supplies

Cal DC

Cal DC LR5301-03 "Blue"
In my earliest Kaypros I have the blue board CalDC boards
	No RIFAs
		#2775 - 037085 #3590 - 039421 #4207 - 040864 #4222 - 040858

From the Tech Manual for switching to 220V: Identified by a bright blue circuit board. A white sticker with "California DC", model, and serial number is located on solder side of board.
There are two ceramic power resistors in the upper right-hand corner of the board. These resistors get quite hot during operation. Wiring should be tied down AWAY FROM THESE COMPONENTS.
Locate a jumper block labelled 115VAC and 230VAC. With the jumper in the 115VAC position the board is configured for 110V.
Remove the jumper from the socket labelled 115 VAC and replace it in the socket labelled 230VAC. The power supply is now configured for 220V use.

Boschert

Boschert XL53.3601R & XL53.3101R
	Original RIFA Caps: 1-0.22 microFarad X and 3-4700 picoFarad X (both 250V) I would suggest replacing the 4700 picoFarad X Caps with Y2 for safety reasons	7954 - HL 2676 - 3601(83/09) #8409 - MBO 9876 - 3101(82/43) #12275 - MBO 3773 - 3101(82/48)
Boschert XL60.3601R

From the Tech Manual for switching to 220V: Identified by the word "Boschert" on the component side of the board at lower right and above the fuse and capacitor C2. Locate a six-inch wire that is soldered to point JP1. If the board is configured for 110V, the other end of the wire is attached to point E1 (labelled 110V). Unplug the wire from point E1 and plug it into E2 (labelled 220V). Point E2 is to the left of point E1. The power supply is now configured for 220V use.

Astec

		Label	Text
			Note the change in position for the one cap of the 4 on the right side.

From the Tech Manual for switching to 220V: