Canon F-402

Date of introduction:  1990 Display technology:  LCD
New price:   Display size:  8 (6 + 2)
Size:  4.9" x 2.7" x 0.4"    
Weight:  2.0 ounces Serial No:  
Batteries:  2*LR44 Date of manufacture:  mth 06 year 1992
AC-Adapter:   Origin of manufacture:  China
Precision:  11  Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

This Canon F-402 is a typical scientific and statistical calculator of the 1990's and fits into a whole line of products:

F-402: Statistical calculations
F-502: Statistical calculations, Base conversions
F-603: Statistical calculations, Logical calculations
F-700: 2-variable statistical calculations, Complex numbers, Equation solver, Programmable

F-402_PCB.jpg (53638 Byte)Dismantling the F-402 gives a common design of a OEM calculator assembled in China. Unfortunately the single-chip calculator circuit is soldered the wrong way, we can't decipher the designation. 

Running Mike Sebastian's "Calculator forensics" on the F-402 gives a known result of 9.0000278593 and we identify a Toshiba design. This result and the small display size of only 6 digits mantissa and 2 digits exponent recalls products like the Canon F-58 introduced about 1984.

If you have additions to the above article please email:

Joerg Woerner, March 17, 2004. No reprints without written permission.