Canon M-10 II

Date of introduction:  January 1987 Display technology:  Fluorescent
New price:   Display size:  10
Size:  5.6" x 5.0" x 1.7"
 142 x 128 x 43 mm3
Weight:  8.3 ounces, 234 grams Serial No:  034049
Batteries:  2*AA Date of manufacture:  mth 12 year 1987
AC-Adapter:  AD-2 Origin of manufacture:  Japan
Precision:  10 Integrated circuits:  HD38401A (7A 15) 
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Canon introduced in 1986 with the M-8 and M-10 a pair of stylish "battery-operated small desktop calculators" as successors of the Canola L813 and Canola L1011, respectively. While this M-10 II still sports the M-10 designation, states the product label on the backside of the calculator clearly M-10 II.

Dismantling the featured M-10 II calculator manufactured in December 1987 in Japan reveals a very cost-effective design centered around a Hitachi HD38401A single-chip calculator known already from the Canola L1011 introduced in 1978 and the Canola L-3 introduced in 1979.

The Hitachi HD38401A is soldered onto a single-sided printed circuit board (PCB) and connected to a 10-digit Vacuum Fluorescent Display (VFD), a keyboard assembly using a second single-sided PCB and powered by 2 AA-sized alkaline batteries.

Looking closer at the PCB you'll notice the unusual 36-pin package of the HD38401A.

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Joerg Woerner, February 18, 2023. No reprints without written permission.