Casio Learn Program CP-20

Serial number	none
Accessories	none
Condition	Average. Backlid fixed with scotch tape, printer is not working, built-in batteries have been removed. "0" and "AC" keys are swapped (this might have happened when the batteries were removed).
Repairs, Comments
Acquired	27.2.2007 courtesy H. Nahrendorf

Serial number	2R108A inside back lid
Accessories	Plastic pouch with small flyer (see below)
	2 cardboard boxes with printer paper, 5 rolls each (see below)
	Manual: "Druckender Elektronikrechner CP-20 Bedienungsanleitung" (German, French, Italian, 61 pages)
Condition	Cosmetically excellent. However, the calculator does not work.
Repairs, Comments	5.6.2008 Removed dead NiCd batteries and tried a regulated power supply to no avail.
Acquired	7.3.2008 courtesy Mr. Polishuk

CP-20 printer paper TRP-16x5
(5 rolls, 16 inch each) Made in Japan

Small 6.6 x 12 cm ad sheet inside of the pouch.
The same ad is present on the back of the sheet in Spanish.

A picture of the insides of the unit with arrows pointing to the wires for the internal battery pack.

Type, Precision, Input mode	Simple, 10 BCD digits, no exponent, Algebraic
Programmable	Yes
Performance Index	Not evaluated because it lacks most of the necessary math instructions
Memory	1 summation register
Display	10 digit 7 segment black&white LCD plus annunciators
Special features	Built-in printer, date and time, alarm, sound
Original Pricing, Production	Made in Japan
Batteries	Internal 4xAAA NiCd pack. External power supply 4.8V DC, minus on center, standard connector.
Dimensions	Length 12.7cm, Width 7.7cm, Height 2cm
Links
Comment	A note on the printer motor indicates "23Apr82" so 1982 must be about the time when it was manifactured. The core chip is a NEC DI848G but there is no information about that on the web.