Schematic
AGS 14 Calculator: Reverse-Engineered Schematic
Schematic of the AGS 14 pocket calculator of 1975 with a nine-digit fluorescent tube.
Schematic
Schematic of the AGS 14 pocket calculator of 1975 with a nine-digit fluorescent tube.
1 14 8• 17 150K L9 Sa Sa FUTABA 9-CT-08 24 1 3 14 13 7 9 10 11 8 12 9 DIGIT VACUUM FLOURESCENT R4 Sb Sb DISPLAY MODULE 3• 23 150K 11 R14 0 1 2 3 4 5 6 7 8 9 KC2 Sc Sc 6 22 L3 a each 12 Sd Sd C √ 1/x RM KC3 21 key f b 5 L2 g Se Se 13 20 % = M+ M– + – ÷ DP CE KC4 e c L10 4 Sf Sf p 19 d V–31 R2 Sg Sg 18 15 R12 L6 Sp Sp 16 3 150K D9 D1 3VAC L4 L5 L7 L8 R10 R9 R7 R6 R5 5 4 R8 V–31 V–31 NEC ZEBRA –26V 9• DCT-10B µPD946C 150K 1 ØD9 POWER 6 10 ?V 50V 1.5n 28 1 10 ØD8 33 9 22K C711 25V 4• 10V 2 7 ØD7 1.5V C620 8 V–4.5 10 ØD6 6V 25V 7 – tip 8 ØD5 ?V 1K V–9 6 4.7 470p 9 50V ØD4 5 V–31 ØD3 4 ØD2 3 Notes ØD1 2 • Digit scanning is in the order: 25 27 26 369147258 kkk 369147258 369147258 V–31 During the “k” periods the segment lines are pulsed in sequence for keyboard V–9 V–9 V–4.5 scanning. One scan of the displayed digits (3 to 8) takes 2.1mS. • Capacitance in microfarads unless otherwise specified. • Based on unit with Serial No. 5710342. • 2001 May 01: Initial drawing / bhilpert. 2020 Feb: Format updates / bh. AGS-14 Calculator Page: 1 / 1 Printed: 2020 Feb 14