M475 — Monitor Module

M4 75 MON I TOR MODULE

The M475 is designed to allow selective acce s s t o a numbe r of s i gnal so ur ce s within a cons ol e system . Pro visi on f s made f or l e ve l cont ro l and muti ng of the se lect ed s t qna l a s may be r e - qui r ed. Th e output of the module i s i nt ended to dr f ve a mo ni t o r am plff i er as we ll as provide a heads et feed. Sourc e s el ec ti on t a kes pl ace with t he aid of an i nt e rl oc ked f f ve - st a tion push-butt on as s embl y . Add iti onall y, t he in put of the modul e ca n be tr ansferred fr om the five se lecta ble inputs t o a SO LO bus or TALKBACK in put by way of a re mote conta ct clo sur e . Mon i tor Input s SW l t hr oug h SW5 select any one of fiv e s i gnal s our ce s whi c h ma y be wir ed t o the mo dul e in put s . z t , Z2 and th eir as s oc iate d comp one nt s fo rm a ba l anced , hi gh input impedance preamp lifie r . The output of Z2 is coupl ed through C5 to the MON I TOR LEVEL cont rol R30. Sol o/Ta l kbac k I npu t De pe ndi ng on the applic at i on of t he modul e , pins 13/P may be utflfz ed t o accept t he feed fro m a SOLO bus , or alt e rnative ly , a TALKBA CK inp ut may be connected t o pi ns ll / M. Bot h SOLO and TA LKBAC K fnput s are coup l ed t o a n i s ol a t i on summin g amp lifier cons i st i ng of Z3 and Z4 . Foll owfng Z4 is t he SOl O/TB LEV EL con - trol R43 , a l lo wf ng fnd ep endent l ev el co ntrol for the SOLO /TB fee d. Mon ito r /S olo Sw itch Z5 is a so l i d s ta t e switch whi ch al lows selective ga t i ng of e i t he r t he MONl TOR or th e SO lO/TS Input to a common out put. Under nor mal con dit i ons , Z5 will be processing th e MONI TOR sig na l . Connec t i ng pin W of th e mo du le connec t o r to ground poten tial will ca us e Z5 t o switch t o t he SOLO/ TS signal. Out put a .c ps

Z6 , Ql and 02 form one- ha lf of th e ac tively bal anced outpu t amp lifie r wI t h Z7, Q3 and Q4 maki ng up the rema ining hal f. BS W

Two ou tputs a r e pro vi ded. One i s bein g pic ked up ahead of the ://

muting rel ay and ap pears at pins 15/S . Th e sec ond ou tp ut is tp ht

2- 1

WARD-BECK SYSTEMS LTD .

CIRC UIT DESCRI PTION M475 MONI TOR MO DUL E

su bj ec t to the op e r a t i on of the muti ng r e l ay and i s brought out at pi ns l7/U . This output i s normal ly use d to fee d the ass ocf ate d monitor amp lI f i er. Muting Op e ra ti ng t he muting relay Kl wi l l resu lt In a reduc t fon of t he mo nit or fe ed l e ve l f rom it s nont ne l +8 dBm ou tp ut . R77 determ ine s the de gree of mutin g and a llows adjus tment o f t he ou tp ut le ~e l from - 12 dBm to fu lly off . Q5 and Q6 function as a r elay d rf ~ e r . Mut i ng con t r ol is a Ch le~e d either by ope r a t ion of MUT E sw itCh SW6 or ex ternally ~ i a pin X of th e mod ul e connector.

Powe r Suppl y De co upli ng C25 t hr oug h C2B t ogether wi t h R9 1 and R92 f or m a passi~ e. on- boa rd pow er s uppl y decoup llng Circuit. CR5 and CR6 p re~en t mod ul e dam ag e in the event of acc i den tal pol a r t ty r e versal .

a .c ps BS W :// tp ht

2- 2

WARo-s eCK SYSTEMS LTO .

PAR TS L I ST

M"5 MONIT OR MODULE

PART DESCRIPTIO N MfG Mf6 PART NU MBE R Cl ca Ca pac i to r " . "7 " u f /10 , Ke_e t T390 B41 5MD 10AS " " C3 • 10 pF Ph i lfps 2 2 22- 6 38 -1 0109 C4 C5 • • • 33 uF /1 0 , • KUle t • T39 0 D336MOI OAS cs C1 C8 • • • • 150 uf / 6 • , " "• • T390f 151MD0 6AS • " " C10 • 10 pF • Ph1l1 ps • 2222· 6 3 8 - 10 10 9

M475 MONIIOR_MODULE Gain: Monitor: So]o: 10 dB +0 . 5 dB _ 18 dB +0,5 dB _ Frequency Response: +0 .25 dB from 30 Hz t0 20 kHz . Noise: 80 dB be ]ow nomina 1 output 0 f +8 dBm . (20 Hz to 20 KHz ) . Harmonic Distortion: Les s than 0 .357 Thd from 30 Hz to 15 kHz at +24 dBm output or Tess Less than 0.1~ at mid-band at +24 dBm output. Source Impedances: Monitor: So]o: 600 ohms or less, balanced/ unbalanced_ 30k ohms; ba lanced Input Impedances Moni tor: So]0 : Ta ]kback: 30k ohms; ba lanced Les s than 5 ohms, ( summing input )_ 78k ohms; ba Ianced Output Impedance: 150 ohms, ba lanced_ Load Impedance: 600 ohms, balanced, Output Level : +8 dBm nominal , +26 dBm max i Mum . Phasing: Input and output termina ] s designated by numbers are in phase Power Requirements : +25 volts dc , 15 mA nomina] , 40 ma maximum. Ambient Temperature: 0 to 60 degrees Celsius. Dimensions : 1 6 " wide X 7" high X 6.5" deep. (41 Mm X 178 Mm X 165 mm ) 1-1

WARD-BECK Systems LTD; CIRCUIT DESCRIPIION M47s MONITOR MQDULE The M475 is designed to a]10w selective access to number 0 f signa ] sources within conso ]e system_ Provision is ma de for Tevel contro] and muting 0 f the selected signa ] a 5 may be re- qui red The output 0 f the module is intended t0 drive monitor amplifier a $ well a$ provide headset feed Source selection takes place with the aid 0 f an interlocked five-station push-button assemb Ty . Additionally , the input 0 f the module can be transferred from the five selectab] e inputs to SOLO bus or TALKBAcK input by way 0f remoLe contact closure Monitor Inputs Sw1 through Sn5 select any one 0 f five signa] sources which may be wired to the modu)e inputs 21 22 and thcir associated components form ba lanced high input impedance preamp]ifier. The output 0 f 22 15 coupled through C5 to the MONITOR LEVEL contro] R30 Solo/ Talkback Input Depending on the application 0 f the module , pins 13/P may be utilized to accept the feed from SOLO bus or alternatively , TALKBACK input may be connected t0 pins I1/M_ Both SOLO and TALKBACK inputs are coupled to an isoTation summing amplifier consisting 0 f 23 and 24 Fo]lowing 24 is the SOLO/TB LEVEL con- tro] R43 , a ]owing independent Teve 1 contro] for the SOLO/TB feed Monitor/Solo Switch 25 is s0]id state swilch which a ]Tows selective gating 0 f either the Monitor or the SOLO/TB input to common output Under norma 1 conditions , 25 will be processing the MONITOR signa ] Connecting pin W 0 f the module connector to ground potentia] WilI cause 25 to switch t0 the SOLO/TB signa 1 Output 26 Q1 and Q2 form one-ha ] f 0 f the actively ba lanced output amp]ifier with 27 , 03 and Q4 Making up the rema ining ha ] f Two outputs are provided One is being Picked UP ahead 0 f the muting relay and appears at pins 15/5 The second output i5 2 -1

WAAD-BECK SYSTEMS LTD CIRCUII DESCRIPIION M4Z5 MONITOR_MODUL E subject to the operation 0 f the muting relay and is brought out at pins 17/U This output i 5 norma I1y used to feed the associated monitor amplifier Muting Operating the muting relay K1 Will resu]t in reduction 0 f the monitor feed Teve 1 from its nomina1 +8 dBm output. R77 determines the degree 0 f muting and a ]ows adjustment 0 f the output Teve1 from -12 dBm to fully 0 f f 05 and 06 function a $ relay driver Muting contro] i5 achieved either by operation 0 f MUTE switch Sw6 or externa]Ty via pin X 0 f the module connector. Power Supply_Decoupl ing C25 through C28 together with R91 and R92 form passive , on-board power supply decoup] ing circuit CRS and CR6 Prevent module dama ge in the event of accidenta] polarity reversa 1 2 -2

WARD-BECK SYSTEms LTD; PARIS LIST M4Z5 MONITOR MODULE PARI DESCRIPIION MFG MFG PART_NUMBER C1 C2 C3 c4 C5 Capacitor 4 .7 uF/10 V Kemet T3908475M010As 10 pF Philips 2222-638-10109 33 UF/10 V Kemet T3900336M010AS C6 C7 C8 C9 C10 150 uF/ 6 V T390E157m006AS 2222-638-10109 10 PF Philips C1 C12 C13 C14 C15 33 UF/10 V Kemet T3900336M01OAS 2 . 2 uF/25 V 10 uF/25 V T3908225M025AS T390c106m025as C16 C17 C18 C19 C20 4.7 UF/10 V delete T390B475M010AS 0 . 01 uF delete Aselco cq92-Mc-103m C21 C22 C23 C24 C25 10 pF 220 uF/10 V Philips Kemet 2222-638-10109 T390F227M010AS 22 uF/25 Siemens 841313-45226-2 C26 C27 C28 C29 10 uF/25 Kemet T390c106m025aS CRI CR2 CR3 CR4 CRS Diode Motorola Fairchild 1n4003 1n4148 Motoro]a 184003 CR6 3 -1

WARD-BECK SYsTems LTD PARIS LIST M475 MONIIOR_MODULE PART DESCRIPIION MFG MEG PART NUMBER DSI DS2 LED , red LE 0 ye ] ow Relay Fa irchild FLVT1Z FLV41O KI Siemens V23012-A0105-4oo1 Transistor Nationa 1 2n2102 2n4037 2n2897 2n2102 2 0 4 5 06 RI R2 R3 R4 R5 PN3569 Resistor #W 5 % 10 10 delete Philips 10 Philips R6 R7 R8 R9 RI 0 10 delete 10 10 Philips RI 1 RI2 RI3 RI4 R15 delete 10 10 delete Phil iPs RI6 RI7 RI8 RI9 R20 10 10 dclete Philips R21 R22 R2 3 R2 4 R25 22k 22k 47k 47k 620 Philips 3 - 2

WARD-BECK SYSTEmS LTD

M4Z5 MONLIOR_MODULE subject to the operation 0 f the muting relay and is brought out at pins 17/U _ This output 15 norma )y used to feed the associated mon tor amp]ifier _ Muting Operating the muting relay K1 wil] result in reduction 0 f the monitor feed Teve1 from ts nomina] +8 dBm output R77 dete rmi nes the degree 0 f muting and a 1 owS adjustment 0 f the output Teve] from -12 dBm to fully 0 f f Q5 and Q6 function a$ reTay driver Muting control i5 achieved either by operation of MUTE switch Sw6 or externa]Ty via pin 0 f the module connector Power_Supply_ Decoupling C25 through C28 together with R91 and R92 form passive , on-board power decoupling circuit CR5 s"ERey and CR6 Prevent module damage in event 0 f accidenta polarity reversa ]

H475 MON ITOR MODULE

PART DE SCRI PTIOH K" MFG PART HUM BE R DS! DSZ LED , ", LE D. y ellow Faf rchil d 0 FLYl 17 FLY4 10 Relay " Ql Trans is tor s teeens Natto na l Yl 301 l·A01 0 5· ADDl 2N 2 l 0 2 Q2 0 0 2N 4031 Q3 0 0 2Nl 10 2 0 Q' 0 2N4037 0 0 05 2Nll 02 05 0 " PN3 56 9

'1 ae s t s t cr '4 W 51: 10 Ph i li ps 10 " 0 0

R3 0 de lete

"" 0 0

0 10 Phil ips 0 10 • "R7 0

0 del e t e • "'1 0 0 10 " • • 10 Phil ip s •

'11 ee te r e ' 12 • • '13 • 10 Phi l ips '14 • 10 • ' 15 0 de l e t e 0 , ' 15 R17 0 10 Phil , ips '18 0 10 '1 , 0 deI e t e 0 0 " 0 a

m .c

" 1 0 Philips , • ea r ps

R22 m ''"" 0 0 BS

0 m , , W

520 '" 0 :// tp ht

'-2

WARO -SECK SYS T EM S LTD .

PARTS LIS T M4 7 5 MONITOR MO DULE

PART OESC R1PTlON MFG HFG PART NU M6ER Phil i p$ '26 '27 sae Re s t s t o r " " " 620 " 36K 36K " " RZ9 " 18K " RlO Po te nt i ometer AlB was 10 -01 5 Rl1 Re s ist , or ~W 5% 15K Ph tlt p s Rl2 4K7 " R33 " 39K " Rl 4 " 39K " R35 " Z2K " 'J6 " m " '37 ," 620 " '38 15K " Rl 9 Trim po t Pihe r PT lOw 5K " 0 Re si s t o r \ W ss 12K Phil t c s R4 1 " 62 0 " R42 " 15K " R43 Pot e ntiomet e r Al B W6S 10 -015 R44 ae s t s tc r ltW 5% 15K Philips ROS " 4K7 " R4 6 " 27 " R47 " 47K "

M475 MONIIOR_MODULE PART DESCRIPTIOn MFG MFG PARTNUMBER R26 R27 R2 8 R29 R30 Res i stor #W 5% 36k 36k 620 18k Potentiometer Philips A/ B WBS 10-015 R31 R32 R33 R34 R35 Resistor YW 53 15k 4k7 39K 39k 22k Philips R36 R37 R38 R39 R4O 22k 620 15k Trim pot Resistor #w 5 % 12k Piher Philips PT 10v 5 K R4 1 R42 R43 R44 R45 620 15k Potentiometer Resistor Gw 5% 15k 4k7 A/ B Philips WB $ 10-015 R46 R47 R48 R49 R50 22 47k 39k 2MZ 100k R5] R52 R53 R54 R55 10k 62k 2M2 2k2 Res istor IW 5% 4k7 R56 R57 R58 R59 R60 Res istor 4W 5~ 10k 15k 3k9 240k delete 3 -3

WAAD-BECK SYStEMS LTD_ PARIS LIST M475 MONIIOR MODULE PART

M475 MONITOR MODULE PART DESCRIPIION MFG MFG PARI_NUMBER SW6 Switch Schadow WBS 11-005 Integrated Circuit Nationa] LM3OTAN # 25 26 27 CD4016 LF357 LM3OTAN WBS recommends the use 0 f replacement parts ma de by the specified ma nufacturers Tor continued optimum equipment performance _ 3 - 5