BA-35 28 SDIP Chip labeled CD4571BN2L MA 52523 PHILIPPINES die labeled 0456A-71B 40 buttons 8-digit, 68-segment LCD -M.M.M.M.M.M.M.M 1 KP row 5 and LCD segs 2 KP column 2 3 KP row 3 and LCD segs 4 KP row 4 and LCD segs 5 KP column 3 6 KP row 1 and LCD segs 7 KP column 4 8 KP row 2 and LCD segs 9 KP row 7 and LCD segs 10 KP column 5 11 battery - 12 battery + and KP row 8 13 LCD common 14 LCD common 15 LCD segs 16 LCD segs 17 LCD segs 18 LCD segs 19 LCD segs 20 LCD segs 21 LCD segs 22 LCD segs 23 LCD segs 24 LCD segs 25 KP row 6 and LCD segs 26 KP column 1 27 LCD common 28 LCD common Buttons Pin 26 Pin 2 Pin 5 Pin 7 Pin 10 batt + 2nd CPT DUE OFF ON/C Pin 9 N %i PMT PV FV Pin 25 FRQ SUM+ /x o~n o~n-1 Pin 1 % 1/x y^x sqrt x / Pin 4 STO 7 8 9 X Pin 3 RCL 4 5 6 - Pin 8 SUM 1 2 3 + Pin 6 EXC 0 . +/- = 68 LCD segments S 8 7 6 5 4 3 2 1 - - - - - - - - | | | | | | | | | | | | | | | | - - - - - - - - - | | | | | | | | | | | | | | | | - . - . - . _ . - . - . - . - DEC2 ANN FIN STAT LCD signals pin 28 pin 27 pin 14 pin 13 1 3D 3C 3A 3B 3 3DP 2E 2F 2G 4 2D 2C 2A 2B 6 2DP 1E 1F 1G 8 1D 1C 1A 1B 9 DEC2 ANN FIN STAT 15 4D 4C 4A 4B 16 5DP 4E 4F 4G 17 5D 5C 5A 5B 18 6DP 5E 5F 5G 19 6D 6C 6A 6B 20 7DP 6E 6F 6G 21 7D 7C 7A 7B 22 8DP 7E 7F 7G 23 8D 8C 8A 8B 24 S 8E 8F 8G 25 4DP 3E 3F 3G 69! in 4.75 seconds