Schematic · 2001
A 3-page schematic of the Wang 320K keyboard and display unit of the Wang 300 series: the key encoder, the diode-matrix Nixie decoder, cathode and anode drivers on +250 V, and the connector pinouts to the electronic package.
OFF 0.02 25V NDS 2.2K NK4 ON 2.2K 0.22 12V CA 470 NK15 NK1 OFF: –1 ON: 0 inhibit keyboard from Logic unit 0 16 ENTER V4 OFF: 0 ON: –1 INH. INH. PROD ACCUM NK14 MULT ACCUM 1 KCA LNx 2 keyboard nENABLED connected 3 19 4 4 20 5 5 MLTACC 21 6 6 ENTACC ÷= 22 7 7 22 RC OFF: –1 ON: nRDY OFF: 0 ON: RDY RR RDY 0: –1 RDY –1: 0 RDY 0: 0 RDY –1: –1 R+ V5 V3 18 3 √x PRDACC 0.1 RDY ex x= NK2 17 2 x2 NK3 ENTRY ACCUM NK10 1 23 8 8 24 9 9 25 10 26 11 27 R– LC 12 LR 28 DP 13 Key Code Layout L+ 29 CD 14 L– 3 2 4 5 31 23 24 25 30 20 21 22 11 26 30 CS 15 31 NK5 15 7 NK9 1 NK6 NK11 12 17 14 13 18 8 19 6 NK7 10 16 29 Section: Keyboard Page: 1 Printed: 2014 Mar 7 K2 K4 K8 K16 9 NK12 Wang 320K Calculator Keyboard/Display Unit K1 KP T1 NKD NDD NKE NDE NKF NDF NKH NDH V0 1 2 T2 4 V0 8 10 of 33K n2 n4 10 of 375 1006 T4 V+250 V0 NKJ 10 of 12K 0.02 NDJ T8 ON V0 n8 DDP (0) 27K D0 (5) 33K 1W 2 27K 27K 0.5W n4 100K n8 D1 (6) 27K D2 (7) 375 1006 100K 27K D3 (8) 27K n2 4 27K 375 1006 D4 (9) 33K 12K 27K 375 1006 12K D5 (10) n8 27K INH. NDS D6 (11) 27K V1 E8 NKN NDN 8 n8 4 100K n8 V1 E4 NKM NDM D7 (12) 1.8M 2 O.F. 4 NKR NDR 100K 27K 375 1006 56K D8 (13) OVERFLOW (digit 0 decimal point) 0.33 100V 27K D9 (14) 27K DS (15) n4 27K n2 V1 E2 NKL NDL n2 V2 E1 2 n4 DECIMAL POINT DIGIT V+250 1 33K NKK NDK 375 1006 82K 12K 33K 1 560K 0.002 375 1006 33K 375 1006 82K DDP 375 1006 DIGIT 9 (MSD) V+250 V+250 Wang 320K Calculator Keyboard/Display Unit Printed: 2014 Mar 7 270K 390 375 1006 82K 180K DIGITS 8 to 0 330K 10 330K 1 375 1006 270K 390 375 1006 180K D9 27K GR86 100K 12K 375 1006 DS 27K 100 Section: Display Page: 2 SIGN DIGIT 8 27K Wang 340 0005 + – Wang 0 2 4 6 8 340 0004 1 3 5 7 9 Notes Vx NKB Ncpp • The symbol denotes a physical connector pin. c=connector, and pp=pin. Solid black end is the male side of the connector. White end is the female side of the connector. +11V NDB RB NKC • Capacitance in microfarads unless otherwise indicated. 0V NDC • These drawings have been derived from reverse engineering of units with Serial No. 201034 & 201062. NKA • Drawn 2001 Jun by bhilpert. See www.cs.ubc.ca/~hilpert/eec for additional information. 375 0002 RI RL –11V NDA NK13 Vx Variations V0 RI=18K, RB=100K, RL=12K V1 RI=12K, RB=68K, RL=1.8K V2 RI=12K, RB=68K, RL=3.3K V3 RI=12K, RB=82K, RL=2.2K V4 RI=6.8K, RB=22K, RL=2.2K, 375 0001 V5 RI=6.8K, RB=47K, RL=33K –V A 1 nENABLED –V A 1 - 19 1 nENABLED +V B 2 ENTACC +V B 2 - 20 2 - Wang 300 Series: Connector from Logic Unit to 320K Keyboard/Display 0V C 3 MLTACC 0V C 3 - 21 3 - as viewed from exterior of logic unit T1 D 4 INH. T1 D 4 - 22 4 INH. NK ND NC T2 E 5 K1 T2 E 5 T4 F 6 K4 T4 F 6 E1 24 6 K4 nENABLED 1 19 - T8 H 7 K16 T8 H 7 E2 25 7 K16 - 2 20 - V+250 switched J 8 E4 26 8 (NK-8) V+250 J 8 - (NC-8) V+250 23 5 K1 - 3 21 INH. 4 22 - E1 K 9 K2 E1 K 9 E8 27 9 K2 E2 L 10 RDY E2 L 10 (NK-P) 28 10 RDY E4 M 11 K8 E4 M 11 O.F. 29 11 K8 K4 6 24 E 1 E8 N 12 K P E8 N 12 INH. 30 12 K P K16 7 25 E 2 ENTACC 31 13 chassis (NK-8) 8 26 E 4 (NC-28) - P 13 chassis P 13 K1 5 23 V+250 O.F. R 14 PRDACC O.F. R 14 MLTACC 32 14 PRDACC K2 9 27 E 8 INH. S 15 KCA INH. S 15 T1 33 15 KCA RDY 10 28 (NK-P) • Italicised expressions are connections with no signal name in the schematic. • Bold-faced expressions are signal sources. T2 34 16 – V K8 11 29 O.F. T4 35 17 + V KP 12 30 INH. T8 36 18 0 V chassis 13 31 ENTACC PRDACC 14 32 MLTACC KCA 15 33 T1 – V 16 34 T2 Wang 320K Calculator Keyboard/Display Unit Section: Connectors Page: 3 Printed: 2014 Mar 7 +V 17 35 T4 0 V 18 36 T8