M451 — Talkback Module

MFG MFG PART NUMBER R45 Knob Cap (Black) Black) E Ima 021-352 040-302 SWI To SWL Button (White) Schadow FGK_WH Sw5 (Red ) FGK-RED WBS recommends the use of replacement parts made by the specified manufaclurers for continued optimum equipment performance. 3-5

WBS 4451 LEYEL control RLS: Controls Ine 3i9m Ieve | of au moov le outputs. output SeLecTor sitctes SuI Uot {h lective routing four different oce Hon_ S : These shitches the output signa oscilltor shitcn ShS : Ficn cpressed the osc i Mlator is ectivated. Vith juoer Fire Wu P lace both S7S and Shi JTs [ Pushed t0 ectivate osc | Iator Z5HI p T WBS MApd Bedxr Ett DiritA M451 TALKLACK MODUE FlOHT PAREL ChD' Llz #CA 451-04-004

AUDIO Mic INPUT 70 dBm 150 OHMS CONTROL PRE TB LEVEL AUDIO INSERT +8 dBm CONTROL OUTPuts +8 dBm 600 OHMS Mic CONTROL COMP BST AUDIO INPUTS Mic 2 INPut 70 dBm 150 OHmS CTL COm CONTROL PRE AUDIO OSC On I-X- CONTROL Mic 2 CONTROL EXTERNAL JUMPER 25 Hz OSC OSC CTL 10/77 REVISED DESIGNATIONS REDRAWN REVISION 9/77 ISSUE |DATE ^C APP WBS WARD-BECK SYSTEMS DRNPMAHONEY ENG. RKB CKD. Rel APP 424 SCALE = M451 TALKBACK MODULE FUNCTIONAL DIAGRAM ISSUE 451-01-001 3

16 V Rse T5 k l6 V R5i 22 k PN3569 R6 620 JVVv CR2 'N4148 R6o C23 <33 kw 47/25 R66 75 I V Rso 22k 5558 CI 100/ 15 R3 'Ook R5 100 RI 22 k R6| 23 "N R4 4k7 {74 C < CR 3 X44143 C 27 47/10 0i ZN52os C6 MIc ON CONTROL 02 Is3/o Ri2 {r2k 244403 03 Rie 01CB7E 22 K V 4.7/10 R7 <rio <R13 Ris Ks IM Stzk 33 k 99 Pn3645 R39 620 CJC Kdp RS7 X5k t16 CPERATOR MIc ~70 aBm I50 n C3 47Op cis IOP Czi 47/10 ~IGV OUTPUT + 888m NOMINAL R2 47k Lh3oi R46 22k A Ra5 Sk EVEL CONTROL 24 I50c {6 V -[6 R40 62k MAA Rs8 ISK R52 220k N Pi 618 C2 22/25 Fe 56 <R9 C7 <r14 Xiktzzhio 330k Cis hOOp R33 R36 <R37 C2u <470k/ pk 2k1 {0O P R4 | M -IV 620 R42 2ok 07 HOLD OfF PicB7E 0i0 PN3s6 CR4 IN414 8 R47 J0O K Riz C24 <33 K~ 47/25 Re7 2 2 CRS 1N4/48 R22 620 R6? 33 IW R6s 4k7 +I6v R48 r0 k ~I6V c3 i00/ -5 Ri9 'O0 K R2o iOk R2i I00 R27 22 k RS3 /20 K PN3645 Ci6 1oop R34 470k P49 TM R59 '5k T2 34 ZNs209 Cig 5 Mic 2 ON 25 Ie3c <F28 NcONTRoL 2n4403 C12 06 <22k 4 7/10 P C87E C3i H0oo Rlb FA R38 220 K MV I-I6 V C22 015 23 Ci7 6,816 PRODUCER MIc 70dBm /Son RIE 47K cio 70p R32 22k R26 {R29 RSI SiM X62k < 33k <R3S 24 tI6V R43 22 K JM Cit R23 ISOP TKS Bz3 Sss81 R44 Sk ThRESHOLD Rss i0o K R54 'Ook CRI IN2I48 -lev SwS 25Hz Ri7 Gk8 c9 22/25 R24 56 SRZEL C14 IOk T2z/o {530 e30k EXT JUMPER CTL Com R7S R76 R73 chAssi5 22 12 $ 8 8 NCTES ; R66 2 97 ARE FLCICRy SELECTED LAST COMPONENTS C31,Cr7, Qii, R76,Z3e Sw5 Sw ( SnZ Sw? SW4 CR7 1n4003 R72 470 M +2sV 2 | 46 C 26 22/25 P L RL 141 CTL | ouT | 13 / sl 15L CTLZ ouT 2 T/ ul "7L CTL3 OLT 3 16 18 CTL4 Ovt4 R7o 330 2 w coM 20 R69 330 k w ISS MOD CKD: 17z 2189 USED OR MatL C2 5 22/25 WBS WARD-BeCk BybteMB LTD OrKBJONES DATE Ock 74 CKD 24.4 SCALE M4si ~25 V 51 4S FnISH TALKBACK MODULE SCHEMATIC CRG IN4003 R7 | 750 TOLS 451-0.2-001

T2 4848 # St Ln m Yq & 0 & 3k R45 CRiz 2K -C31+ 83 2N3209 j0-0l5 J { 82 2/5 ~R2 41K c8 1og5 ~Ri8 4k 1c9 CZ 222, Pio87E 2N440} ~R261 Ri % R73520 Ri7 eKe 1 Ri4320k RIs 23K PIO8ZE ~R3i 22K ~R13 52* RI6 22k Rio I Sw4 ~R32 22k R9 1OK -C4 !SoPp '1-9e2 ~R24 52 ~C743/10 2N3209 +-s"-ho ~R23 K5 #Ci2170 Clt IsoOp LhBoh C2O@OF R74 52o pK 62k WBS R25 ~C2lttho_ R4o 244403 R2i 1 8 R372k2 CANADA R2o Ink R2g G2K ao ~Ci8 0.224 7 R39 4-137 SW 3 ,-0o2 Rig !DoK R3o a*0k R36rs, 0) ~ci91 ~C1047p R22920 R28 22* ljmor ~R3347ok ~R27 22k +C13 *3/10 R75e20 PN3e45 Pn32+5 Qi Sw 2 8 2 Rzoz I-C2 Ja Aneczk a a 38 _R434 R5ijk # 8 83 2 3 ~R30 @rok 4 Rsotr 9 $ 47048 ~CRI 34 ~R7G 620 8 ? ~R35 2 1N4003 Fo 12oK ~Cizreyia CRG 1 L Jzz] 1 R53 "ok Sw 1 R68 * J [ 1(-002 L8 4 ~R34 4nK KCR "7*3 32 CR4g Jn 8 ~Ci6 Rop ~RCs R69 #eVw 3 R48 1K c25 22/25 P13563 ~R47 EK PN3569 ~R71150 2 8 ~R4g *K Ic c26 142 ~R72 4o Sw R522rok {go2| R7o @Yz w 8 80 3712 Wzslc4ics REVERSED GEB Wz8C7 814 W45_22/o Iissu DATE REVISION ApP NOTE: Q7 € R68 ARE FACTORY SELECTED WBS WARD-BECK ByBTeMB DRN RveIs ENG CKD 3 APP scn M4si TALKBACK MODULE COMPONENT LAYOUT IssUE 451-04-001

1 @ 4 7 1 2 3 8 3 4 4 1 ! KEH X Badie OPERA TOR MIC OPERATOR Mic GND Bl 2 GND PRODUCER MiC Ci 3 PRODUCER MIC NC Di 4 NC MUTE CTL El 5 MUTE CTL NC Fl 6 NC NC HI 7 NC NC 8 NC Output Ki 9 OUtPut Switch IN 10 Switch In Osc CTL MlII CTL COM AUX N/12 AUX CTL 1 Pl13 CTL 2 OUT Rl14 OUT Out 2 s/15 Out 2 CTL 3 T/16 CTL 4 Out 3 0/17 Out 3 Out 4 vl18 Out 4 NC Wl19 25V 1 [ NC Xi2o 25V COM NC Yi21 +25v 3 8 NC 2i22 CHASSIS 8 8 LEGEND: NC : not CONNECTED

MFG MFG PART NUMBER R45 Knob Cap (Black ) (Rlack) E Ima 021-352 040-302 SW1 To SWL Rutton (White) Schadow FGK-WH Sw5 (Red) FGK-RED WBS recommends the use of replacement parts made by the specified manufacturers for continued optimum equipment performance. 3-5

WbS 4451 LEYEL control RLS: Controls Ine sign] Ieve | of al moar le outpUIS output SeLector shitctes S41 Stl : These shitches Mo (he Jective routing of the output Ii9na four dinterent loca Lons Oscillator shitcn 545 : en Gpressed the osc i Mator Ts ectivated Vith under Bire Wm P lace both S7S and Shi Tust Pushed activate osc i | lator Z5HI ph Iss DATI Ld WBS MARD-Frdx Etette DaH RELey EnG O Lull / A4s1 IALKLACK Modue FOHT PaNEL p 451-04-004

AUDIO Mic INPUT 70 dBm 150 OHMS CONTROL PRE TB LEVEL AUDIO INSERT +8 dBm CONTROL OUTPuts +8 dBm 600 OHMS Mic CONTROL COMP BST AUDIO INPUTS Mic 2 INPut 70 dBm 150 OHmS CTL COm CONTROL PRE AUDIO OSC On I-X- CONTROL Mic 2 CONTROL EXTERNAL JUMPER 25 Hz OSC OSC CTL 10/77 REVISED DESIGNATIONS REDRAWN REVISION 9/77 ISSUE |DATE ^C APP WBS WARD-BECK SYSTEMS DRNPMAHONEY ENG. RKB CKD. Rel APP 424 SCALE = M451 TALKBACK MODULE FUNCTIONAL DIAGRAM ISSUE 451-01-001 3

16 V Rse T5 k l6 V R5i 22 k PN3569 R6 620 JVv CR2 in4148 R6o C23 233 kw 47/25 R6l 75 116 Rso 22k 5556 Ci /00/ 15 R3 '0ok R5 /00 RI 22 k Rt | 33 "W Ra 4K7 574 'ck CR3 XN+14 3 C 27 4.7/10 0i ZNs2o9 C6 MIc ON CONTROL 02 Ls3/o SR82 244403 03 Ri6 c5 FCB7E 22 K M 4.7/10 R7 Ris {fi <B2k 'KS IM <6zk 33 k 09 Pn3645 R39 620 CJC VDp R57 X5k CPERATOR MIc -70 JBm IS0n C 3 47Op Cis Czi IOP 47/10 ~IlV OUTPUT + 888m NOMINAL R2 47k 4boi R46 22k A R45 Sk CEVEL COnTROL 24 ISuc {6 V -[6 R40 62k MA Rs8 ISk R52 220k Fi 616 c2 22/25 Fe 56 <Rg C7 <R14 SiakTzzho 430k Cis 10Op R33 R36 <R37 S4701< iOk Czu 2kZ {00P R4 | MA ~Iev 620 R42 zok 07 HOLD OFF Pic87E 0i0 PN3569 CR4 IN4I4 8 R47 I0K JA R6z C24 <33 Vw 47/25 R67 R22 620 CRS 1N4/+8 R6? 33 I2W R6s 4k7 Tov R45 i0k ~I6V C Iool ,5 Ri9 'CCk R2o i0K R2i ic0 R27 22 k RS3 /20 K PN3645 Cie Ioup R49 M R34 470k Rs9 '5 K 34 ZNs209 Ci3 T2 5 Mic 2 05 Izgic <R23 NONTRsy 2N4403 C12 06 <22k 4 7/10 P iCE7E C3i Naod Rcb F R38 220 K Nv -lo V C22 0/5 23 Ci7 6,816 PRODUCER MIC 70dBm Ison RIE 47k cio 470? R32 22 k {R26_ {R29 R3I SiM S62K <R31 <R3S 24 tI6V R43 22 K L Cii R23 #SOOP> |KS 9z3] 3558 R44 Sk ThaisHOLD Rss ijo K R54 i0ok CRi IN4148 -iev Sws 25H2 Ri7 Gk8 R24 56 <RZSLC14 Siok Tzz/io <530 930k c9 22/25 EXT; JUMPER CT COM: R73 R7S R76 ChASsiS 22 12 6 28 8 CR7 1n4003 NCTES: R6b 4 97 ARE FeC-crv SELECTEd LASI COMRNENS- c3i,CR7, Qi,R76,23e Sws Sw | SWZ Sw? SW4 R72 470 W +2sV 2 | 46 RL 14 CTL | ouT 13 / sl I5L CTLZ ouT 2 T + ul "L CTL3 OT 3 16 18 CTL4 OuT4 C26 22/25 R7o 330 " w com 20 R69 330 k w ISSMOD CKD: [z0 2i8e84 USED_Oh MatI, C25 22/25 WBS WARD-BeCK BybtemB LTD DRK BJONE S DATE OCL 74 CKD 70 / SCALE M451 ~25 V 79 31 ML INISH TALKBACK MODULE SCHEMATIC 451-02-001 CR6 TN40O3 R7 | 750 TOLS

T2 4848 # St Ln m Yq & 0 & 3k R45 CRiz 2K -C31+ 83 2N3209 j0-0l5 J { 82 2/5 ~R2 41K c8 1og5 ~Ri8 4k 1c9 CZ 222, Pio87E 2N440} ~R261 Ri % R73520 Ri7 eKe 1 Ri4320k RIs 23K PIO8ZE ~R3i 22K ~R13 52* RI6 22k Rio I Sw4 ~R32 22k R9 1OK -C4 !SoPp '1-9e2 ~R24 52 ~C743/10 2N3209 +-s"-ho ~R23 K5 #Ci2170 Clt IsoOp LhBoh C2O@OF R74 52o pK 62k WBS R25 ~C2lttho_ R4o 244403 R2i 1 8 R372k2 CANADA R2o Ink R2g G2K ao ~Ci8 0.224 7 R39 4-137 SW 3 ,-0o2 Rig !DoK R3o a*0k R36rs, 0) ~ci91 ~C1047p R22920 R28 22* ljmor ~R3347ok ~R27 22k +C13 *3/10 R75e20 PN3e45 Pn32+5 Qi Sw 2 8 2 Rzoz I-C2 Ja Aneczk a a 38 _R434 R5ijk # 8 83 2 3 ~R30 @rok 4 Rsotr 9 $ 47048 ~CRI 34 ~R7G 620 8 ? ~R35 2 1N4003 Fo 12oK ~Cizreyia CRG 1 L Jzz] 1 R53 "ok Sw 1 R68 * J [ 1(-002 L8 4 ~R34 4nK KCR "7*3 32 CR4g Jn 8 ~Ci6 Rop ~RCs R69 #eVw 3 R48 1K c25 22/25 P13563 ~R47 EK PN3569 ~R71150 2 8 ~R4g *K Ic c26 142 ~R72 4o Sw R522rok {go2| R7o @Yz w 8 80 3712 Wzslc4ics REVERSED GEB Wz8C7 814 W45_22/o Iissu DATE REVISION ApP NOTE: Q7 € R68 ARE FACTORY SELECTED WBS WARD-BECK ByBTeMB DRN RveIs ENG CKD 3 APP scn M4si TALKBACK MODULE COMPONENT LAYOUT IssUE 451-04-001

; 9 4 7 1 2 2 8 GV 1 ! NEH X Eadz OPERA TOR MIC OPERATOR Mic GND Bl 2 GND PRODUCER MiC C 3 PRODUCER MIC NC D NC MUTE CTL El 5 MUTE CT NC F 6 NC NC H| 7 NC NC 8 NC OUTPut Kl 9 OutPut Switch IN 10 Switch In OSc CTL MTI CTL COM AUX N/12 AUX CTL 1 Pl13 CTL 2 OUT Rl14 OUT Out 2 s/15 Out 2 CTL 3 T/16 CTL 4 Out 3 0/17 Out 3 Out 4 v/18 Out 4 NC Wl19 25V 6 1 NC Xi2o 25V COM NC Yi21 +25v 3 g NC 2i22 CHASSIS 8 0 LEGEND: NC : not CONNECTED

MFG MFG PART NUMBER R45 Knob cap (Black Rlack Elma 021-352 040-302 SW1 Button (White) Schadow FGK_WH SWL Sw5 (Red) FGK-RED WBS recommends the use replacement parts made by the specified manufacturers for continued optimum equipment performance 3-5

" 451 TAlKBACK MOO ULE

PART DESCRI P TI ON , ." MFG PAR T NUM BER CI Ca p a c ito r 10 0 uF /25 Ph 1 11p s 426ETFlDO ce " 22 u F/ 25 Y Ph fl ips 426ETF 2 2 C3 " 470 p F " 222 2 · 6 3 0 - 0 34 7 1 C4 C5 • • 150 0 pF 4 7 uF /l O, Ase l c o Keme t CQ 92 -MC-152 M T3900 4 76MOl OAS CO • 33 lIF/l O V " T39003 36 MOl OAS C7 C8 • " 100 uFf25 , 2 .2 lIFIlO Y " Ph1 li p s T3 90A 22 5M0 10AS 4 2 6 ETF1 0 O " " CTO " 22 I,I F!25 Y 4 70 p F Ph 1 1 1p s " 4 26ETF22 2 222 - 6 30- 0 3 4 7 1 e ll " 15 0 0 p F Aselco CQ92 - MC- 152 M C12 " 4. 7 uFIlO Y Keme t T3908 4 75MOl OAS e13 " 33 I,I FIl O Y " T3 9 0 0 3 36M 0 10AS e14 " 2 • 2 u FIlO Y " T39 0A2 2 SH0 10 AS CI S " 10 0 pF Ph t 1i p s 2222 - 63 8 - 70 1 0 1 el6 " 100 pF " • C17 • 6. 8 uFIl O V Kemet T390B685M01 QA5 e18 • 0.22 uF Ptl11 1ps 344 CHA 2 2 0K e19 • 10 p F • 2222 · 63 8 -10 10 9 C20 • 100 pF " 2222- 638-7 0101 ell • 4 . 7 uF IlO V xeee t T39 0 847SM01OAS C22 ell • • • 0 . 1 5 11F 4 7 uF /2 S • , Philips Kelle t • 344CHA1S0K T390E 4 76M02 SA S e24 • C2S • 22 uF / 25 V Ph i l1 p s 4 26ETF22 CZ6 " 22 uF /25 V • • C27 " 4 . 7 uF IlO V Kellet T39 0U 75M0 10AS e28 • delete C29 • • eJO • 1000 pF Aselc o CQ92 - MC 102 M e31 • 1000 pF • • a .c

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Diod e Fa i r c h il d 1N414 8 eel • • • BS

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WARD-BECK S YSTEMS L.TD .

PARTS L IST

1'1451 TALKBA CK MODULE

PART DESCRIP TION HFG MFG PART HUMB ER

Diod e Mo t or o h '" CR7 0 • 1H4003 0

Nati onal ,2 Q1 Tr ansistor 0

• • • ,"5209 2H " 03 OJ P1087E Q4 • • 2H5209 OS • • 2H4403 • "OS 0 P10 8 7E Q7 0 • 0

0 0 PH3 56 9

"' 10 0 0 PN 364 5 • 0 PI'l356 9

M451 IALKBACK_MODULE PART DESCRIPIION MFG MFG PART NUMBER CR6 CR7 Diode Motoro]a 1n4003 Transistor Nationa/ 2n5209 2n4403 218285 2n4403 2 8 3 5 6 8 7 8 9 Q10 Q11 P1O87E Pn3569 Pn3645 PN356 9 Pn3645 RI R2 R3 R4 R5 Resistor Xw 5% 6k8 47k 100k 10k 100 Philips R6 R7 R8 R9 RIO 620 1kS 56 10k IM RI1 R12 RI3 RI4 RI5 22k 22k 62k 330k 33k R16 R17 RI8 RI9 R20 22k 6K8 47k 1o0k 10k 3-2

WARD-BECK BYSTEmS LTD; PARIS_LIST M451 IALKBACK_MODULE PART DESCRIPIION MFG MFG PART NUMBER R21 R22 R23 R24 R25 Resistor xW 5% 100 620 1K5 56 10k Philips R26 R27 R28 R29 R30 IM 22k 22k 62k 330k R31 R32 R33 R34 R35 33k 22k 470k 470k 24 R36 R37 R38 R39 R40 Took 2k2 2z0k 620 62k R41 R4 2 R43 R44 R45 620 Trim pot Resistor Yn 5 % 22k Trim pot Potentiometer Piher Philips Piher A/B PT 10v 20k PT 10v 5k WBS 10-015 R46 R4z R48 R49 R50 Resistor Yw 5 % 22k 100k 10k IM 22k Philips R5 1 R52 R5 3 R54 RSS 22k 220k 120k 100k 100k 3-3

WARD-BECK BYBTEMS LTD;

M451 TALKBACK MODULE PART DESCRIPTIOn MFG MFG PART NUMBER R56 R57 R58 R59 R60 Resistor AW 5 % 15k 15k 15k 15K Resistor ZW 5 % 33 Philips R61 R62 R63 R64 R65 33 33 33 Resistor XW 5 % 4K7 4K7 R66 R67 R68 R69 R7O 75 Resistor YW 5 % 330 330 Factory selected R7I R72 R73 R74 R75 Resistor AW 5 % 750 470 620 620 620 R76 620 Sw] Sw2 SW3 SW4 SW5 Switch Schadow WBS 11-002 WBS 11-005 z1 22 23 Integrated Circuit Nationa 1 LM301A LMI458N LM1458N WBS recommends the use 0 f replacement parts ma de by the specified manufacturers for continued optimum equipment performance 3-4