Spelling B 40 DIP marked TMC0272NL DAS 7901 SINGAPORE die labeled 0272A T0270B 28 SDIP marked TMC1984NL DAS 7849 SINGAPORE die labeled 1980A 84A 8-digit 14-segment VFD with decimal points and apostrophes 38 buttons Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Vss Batt+ Starts With Missing Letter Mystery Word Scramble ON Pin 27 Level GO OFF Pin 30 A B C D E Pin 31 F G H I J Pin 29 K L M N O Pin 32 P Q R S T Pin 28 U V W X Y Pin 33 Z MEMORY CLUE ERASE ENTER TMC0272 1 ?? - batt+ 2 KP - keypad col 1 (left) 3 K1 - keypad col 2 4 K2 - keypad col 3 5 K4 - keypad col 4 6 K8 - keypad col 5 (right) 7 FIL1 - VFD filament 8 FIL2 - VFD filament 9 VFD segment A 10 VFD segment B and TMC1984-7 (K1?) 11 VFD segment G1 12 VFD segment E and TMC1984-8 (K2?) 13 VFD segment C and TMC1984-10 (K3?) 14 VFD segment D and TMC1984-11 (K4?) 15 VFD segment I 16 VFD segment J 17 VFD segment H 18 VFD segment M 19 VFD segment K 20 VFD segment L 21 VFD segment decimal point 22 VFD segment G2 23 VFD segment F 24 VFD segment apostrophe 25 batt+ 26 batt+ 27 VFD digit 2 and keypad row 7 28 VFD digit 4 and keypad row 2 29 VFD digit 6 and keypad row 4 30 VFD digit 8 (left) and keypad row 6 31 VFD digit 7 and keypad row 5 32 VFD digit 5 and keypad row 3 33 VFD digit 3 and keypad row 1 (bottom) 34 VFD digit 1 (right) 35 N/C 36 N/C 37 batt- 38 VSS - batt+ 39 VGG - TMC1984-22 (??) 40 VDD - TMC1984-6 (VDD) TMC1984 1 batt+ 2 N/C 3 N/C 4 N/C 5 Rdd? - connected to diode in power supply section 6 Vdd - connected to TMC0272-40 7 K1? - TMC0272-10, also to TMC1984 pins 9, 16, 25 8 K2? - TMC0272-11, also to TMC1984 pin 17 9 ?? - TMC1984 pins 7, 16, 25 10 K3? - TMC0272-13, also to TMC1984 pin 13 11 K4? - TMC0272-14, also to TMC1984 pin 14 12 O7? - N/C 13 O6? - TMC1984 pin 10 14 O5? - TMC1984 pin 11 15 O4? - N/C 16 O3? - TMC1984 pins 7, 9, 25 17 O2? - TMC1984 pin 8 18 O1? - N/C 19 O0? - N/C 20 Vss 21 Osc? - connected to Vss 22 ?? - TMC0272-39 23 N/C 24 N/C 25 D7? - TMC1984 pins 7, 9, 16 26 N/C 27 N/C 28 N/C VFD Segments AAAAAAAAA FH I JB F H I J B F HIJ B G1G1 G2G2 E MLK C E M L K C EM L KC DDDDDDDDD