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Telex MCE325 User's Manual

Contents

1. 4 6 Level and Frequency Response Check Intercom Channel to Speaker 4 7 Level and Frequency Response Program to Headphones and Speaker 4 7 Program A to bert Headphone as ho NG PNPA Pah Na 4 7 Program B to Right Headphone s ooo oum amp oe c UR Ry mox ao xs X Yu RON 4 8 Program to Speakers a u sin se oe a Re RC EIC EE ite RE 4 8 4 8 cec 4 8 Level and Frequency Response Check Four Wire Input to Headphone 4 9 Four Wire Input to Left Headphone 4 9 Four Wire input to Right Headphone 4 9 PaneliMieto Channel Test Le ES 4 10 Carbon to Channel 4 10 NG IBS brass DS Dre gt 4 10 Mes Boicocnu N SR Re DOS 4 10 DTP 4 11 Call Rp RUE die om ad Te 4 11 CaltRecewe Test 4208264245 24264 OSEE Oe Se 4 11 4 12 Remote MIC T
2. 5 dr ent DAMON Se _ 4 1 Gotrective Maintenance un Bais es D EOS de SP 4 1 hier 4 1 Front Panel Removal zu aaa kh aps DIN Tear EE dede DE DEA 4 1 E u c r 4 2 Test and Adjustment Procedures 4 2 a Bw dre Bah 4 2 jue e 4 2 Test IC 4 2 COMMGULATION P A ee SE NS BS Bo 4 3 e db dw t t 4 3 USMB Un Switched Microphone Balanced Frequency Response Level 4 4 Frequency Response and Level Check Mic to Line 4 4 Four Channel Two Wire Mode 4 4 Two Channel Four Wire Mode 4 5 Sidetone Null Test and Adjustment 4 5 While Sidetone Adjust SEE amp 2 4 6 Level and Frequency Response Check Intercom Channel to Headphone
3. 6 26 90 7 12 90 REVISED PARTS LIST NO PER 238 RTC 10 15 90 GM10 15 90 ADDED OF TRANSFORMER PER ECO 3295 RTC 12 14 90 GM12 14 90 ADD GRN YEL WIRE amp GND LUG ADD GRN YEL ae 5 2 PLACES ADD DETAIL B B UL amp sie LABELS ADD NOTE kg 116 25 92 RGP ECO 55779 CHNG FLAG NOTE 3 ECO 61255 12 5 95 JC CHG VIEW OF HEATSINK P N 91806324 01 SHOWN WAS P N 91806324 00 ADD HEATSINK 4 6 01 KS 2 4 PLACES AND RAIL CALLOUTS ECO 73382 A SEE DETAIL 2 5 WIRES THIS AREA BOTTOM OF HEATSINK TO MAKE CONTACT WITH RAIL OF CHASSIS RAIL 30 REF 5 DETAIL B B 2 1 SEE SEPARATE PARTS LIST 9010 6464 00 110VAC 9010 6464 06 220VAC MOTHERBOARD CONTRACT NO Nee EE R TS 5 YS 5 BURBANK CALIFORNIA USA ADD THE UL MARKING LABEL AND WARNING LABEL ON THE BOTTOM OF THE ANSI E94 11 1967 R1972 UNIT AS SHOWN TER Ewe FINAL ASSEMBLY ZA INSTALL RUBBER BUMPER ITEM 17 APPROX AS SHOWN BEFORE PROGRAMMABLE USER STATION SLIDING THE REAR PANEL ASSY ITEM 2 FORWARD MODEL MCE325 7 12 90 CUT A 7 0 X 6 7 PIECE OF MYLAR FROM ITEM 6 AND ADHERE AC MEET BOTTOM CASE ITEM 3 sates Pes 56464 ee Ee NOTES UNLESS OTHERWISE SPECIFIED APPLICATION 6 4
4. Connect a 200 ohm termination resistor across each of the four intercom channels 1 J8 pins 1 and 2 2 8 pins 1 and 3 CH 3 pins 1 and 2 CH 4 pins 1 and 3 Set all front panel buttons to off 4 Setall volume controls to minimum 1 Keying Output Test Connect two 47 ohm resistors one from the key 1 output J22 pin 6 to the 14 VDC supply and one from the key 2 output J22 pin 19 to the 14 VDC supply The cathode of D22 serves as a convenient connection point for the 14 VDC supply Refer to the AS6245 drawing in Section 6 for the location of D22 The key and key 2 outputs require external pull up resistors The key 3 and key 4 outputs have internal pull up resistors RP2B and RP2D respectively and do not require external pull ups Figure 4 1 Auxiliary connector J22 j 000000000000 211111111114 4 3 2 Set the button to on Set all other front panel buttons to off 3 Check for 13 VDC minimum at the key 1 output 4 Turn CH 1 TALK on and check for less than 2 at the key 1 output 5 Repeat steps 3 and 4 for the other channels CH2 TALK key 2 out J22 pin 19 CH3 TALK key 3 out J22 pin 7 CH4 TALK key 4 out J22 pin 20 6 Remove the 47 kohm pul
5. Se memes 3 2 Volume Ge d 3 2 Front Panel Sidetone Trimmer Adjustment 3 2 Sending and Receiving Call Signals 3 3 Using 4 us napa aya Je de gt amp 3 3 Front Pariel Proegramittulig wr aot Le LR ES 3 3 Activating Setup Mode zs 4 si BES AD Pd 3 3 Menu Selection Ending 5 3 3 SUDMENU Se aeea dare de aea TEX ENS as Vi 3 3 a RS M 3 4 Foutrschannel LISten LL i s ER ARENAS 3 4 MONO BANAL deb dE M ded A 3 4 AIS ADI s es 3 4 s uuo et DE ee ees 3 4 c r 3 4 IPC 5 a ee 3 5 acci Ra yale Km 3 5 Maintenance 4 1 Preventive Maintenance 4 1 Factorv oupport
6. 2 SEE SCHEMATIC DIAGRAM 600240 acme oo RTS SYSTEMS sumasang DIMENSIONS ARE INCHES POTS RI RZ4 RB MUST BE FULLY INSERTED ae PANEL BOARD MCE3Z5 Arch Eng Supply 357 9601 Title 6246 01B cal Date 7 23 01 Time 05 27 24 PM REVISIONS ee oesememen ________ wmm ADDED 1540 O 5 tx ia ____ lt eevee fee fr 52740 2 PER 2494 5 797 SEE DWG AS G26Z FOR WIRING OF PRIMARY SIDE 4 40 X 1 4 PAN HD PHIL PLACES pcne i eg mj TE ____ 0000000 0000000 O O OO 122 o s et 5 AN 096 x mo pi 012 013 06 07 04 4 OD O in R 5 O amp OR100 e 6 2990 EN 0999 2280 02 21 228 9940 01555 OF 0 666 556 9 205500 Est 59920 9099 EG lt oO 223 SS aS iio BBC Q 08 TENES OL RED E RP3 wht 4 Kat 4 PLACES c Bi 490 40 a BB SCOR COE
7. SEE SEPARATE PARTS LIST 9020 6261 00 CONTRACT NO maaawa PETS SYSTEMS 2 R T CRUZ 1 16 89 FRONT PANEL 25 MATERIAL CHECKED e ISSUED SIZE FSCM NO DWG NO REV 1 __ 6872 NE 3 x aaa DEC ANGLES 5 21 18 xX 2 080 37 XX 2 030 Date 7 23 01 Time 05 22 16 PM 7 6 5 4 3 2 1 REVISIONS mm csemnon ONE a He KIS RELEASE 16 REVISED PER tO 2080 CAC c ew view ur zc 73982 fo PLACES USE OF FIXTURE NEEDED TO INSTALL HEATSINK ASSY PART OF GEN VINYL S PLUG INTO 25 B B CRIMP WIRES TOGETHER ORIS WHT 2 PLACES 3 PLACES DETAIL REAR VIEL oF SPEAKER JACK SHOWN SEE SEPARATE PARTS LIST 9OZO 626G2 00 A UNLESS OTHERWISE SPECIFIED CONTRACT NO A A N APPLY GLYPTOL TELEX 53181 000 To FUSE HOLDER ITEM ARE RTS SYSTEMS CALIFORNIA 2 NG PREVENT NUT FRoM GETTING LOOSE Ue ri CHECKED PANEL MCESZZ GETTING LOOSE G MORALES 1 15 64 ISSUED FSCM NO DWG JN noo se sieeve 050 Lo RE MBA O NOTES UNLESS OTHERWISE SPECIFIED __ 1 punir LN APPLY ADHESIVE CoMPoUMD LocKTiTE JM326 To THREAD SCREENS IZ PREVENT NUTS FROM Title D TEMP AS62
8. 9027624501 A CD A SHT1 6D DN SHT1 6D L CALL LIGHT MUX SHT1 6A SHT1 5A R198 SHT2 6B 270K 7 SHT1 8B SHT2 6D U30A T VA SHT2 6B 5 1 50 VOX IN L_ gt 4093 Y1 2A 4 00MHz O 5V LSN1 5871 4D SHT2 5D SHT1 4D 5 1 4 SHT2 6D LSN SET1 4C 5812 5C SHT1 4C SHT2 7C SHT1 4B SHT2 7C Q DBLSN3 SHT1 4B SHT2 6C 45V SHT2 6B O 70 p LSN4 SHT1 4B SHT2 5C 7D PDO RDI 14V XX gt 2D PD1 TDO R199 14V PD2 MISO YY gt CALLCTL2 TO 2D PD3 MOSI J 17 25VDC a PD4 SCK ZZ RP2G PD5 SS E10 11 RP2H 22K 22 721 7 Q 39 51 3304 12 13 FFC NZ LA 1 14V VSS 050 a 7 SPKR ON PANEL 68 7058 RP14D 8 680 5 CALL LIGHT 20 __9 0 680 6 FRONT RP15B A 68 7 e PANEL 5V Q RP 5 68 8 LEDS 5V 9 RP15D 8 680 2 CH 1 R212 Q 4 45V a 270K 120 211 1 R215 7 100 22 4093 122 100K 121 MC33064 R213 E 45V 270K 10 gt 10K pani e RP8A RP8B RP8C RP8D RP8E RP8F RP8G RP8H 8 721 C122 39 51 3304 MOLEX FFC 7 1 50 22K 22K 22K 22 22 22K 22K 22 22 N C 11 O CO 12
9. eae ane 2 10 External HeadSet uo aro XE E SERE _ a vx sra x eS 2 10 External Electret Microphone 2 11 Unswitched Microphone Output 2 11 ExtemalDO FowWer Source eR QUE dei _______ 2 11 Remote Speaker Mute Control 2 11 Front Panel Headset Connections 2 11 Headset AEQUI MENES d A Se duo RM eS Be ee 2 11 Headset Connections 2 11 Operation 3 1 1 14 1 1 PCM Har Bose eh tae NS Ee 3 1 s a ras a 3 1 Momentary Latching Button action 3 1 eS Ao rdv Meno ih dart dio De asd d 3 1 gt 219118 9 tr URS E pde 3 1 Panel Mic Headset Selection 3 2 Microphone OMO ES ES A 3 2 Speaker OMO due
10. Eten Sr nee BIN des seems 1 4 Programming miie PLI 1 4 FOWBI e ur 1 4 Mounting Gonflguretiort a RA EUROPE OL BER e E CE RS 1 4 MCES25 Speciicalions 2 2 4 4 1 5 CO LE Se ee aoe Benge 1 5 Microphone Preamplifier x 5444665 44464854446 4548 a 1 5 Headphone AmplHllels i p duced Sur ENS UE 1 5 arie pa ee ee dec eR S 1 5 Power and Mechanical 1 5 COnneClOlIs x suco Seb qui Dodd dp Ser dem 1 6 MCSS25 Specifications 1 6 Installation 2 1 Internal Programming and Adjustments 2 1 ee BS oS 2 1 Intercom Line Channel Configurations 051 053 J6 J7 19 amp J20 2 2 Front Panel Setup Mode Lock out 054 2 5 AA AA 2 5 Remote Talk on DS7 ws 2 4 ak he EUR SX meu SUE dere Sun 2 5 ae eG Ta Ne 2 5 Program Assignment IFB O
11. 11 11 p PANFL Le CALL LIGHT FRONT 4 16 HA PANEL 17 SWITCHES ds 2 mr 5V RP9A RP9B RP9D 4093 22K 22K 22K DOK SHT1 8D D 1906 time 210 0 ll 60 1 4093 E e 3 TU Cel 505 15 _____ ig Oj MID 10 5D DSW7 VOLTAGE R264 12 A FAN 7D VOX IN X AA CO 17 25VDC SOURCE 4 269 OFF ON REAR PANEL MOUNTED 021 R265 ms 18V IN LD gt 220K VOX REC L__ gt 7 13 SHT2 1D 1N4004 D20 1N4004 SHT1 1D A SHT1 4A E TO 10R RT m lt 14V SOURCE R268 5V 15VA 005 gt 4 5 SOURCE 4 T iod BG AA 022 7 508 TO ELECTRET PANEL 0 5A SBLO 1 4004 LM317T MIC VIA NETWORK 15VAC LM317T 5V SOURCE AC PLUG R267 M TO DIGITAL IC S 301 C133 C125 1 100 25 4700 35 C132 1 50 NEUTRAL C131 10 25 E9 R261 C126 GND TP 22K 1 500 2 CAPACITANCE VALUES ARE SHOWN IN MICROFARADS VOLTS A 1 ALL RESISTORS ARE CARBON FILM 1 8W 5 NOTES UNLESS OTHERWISE SPECIFIED Title PAGE MOTHER BOARD MCE325 3 REV 9027624501 A 5 4 3 2 1 Date 7 23 01 FILE CORP 7 6 3 Zone Rev Description Date REPLACED 31 43 WITH MOLEX CONN 10 23 89 PER ECO
12. CF M 9999 ee e Q3 ti n 2 19 293999 a SCXD RAISE TEST POINT JUMPER 1 6 MIN 5 0 555555 5 5 m 2 4999999 25590999 5 6 9 027 55 5 espero 666666 65656 2f 2202 Ut PESE de 00000000900000 9568419 DE 135 09000000 9 236 926 YO S oo ws 9 2 6905 4 595955555 5555959559 ooooooo 958 bo OOOO 06 TI 4 2 Uzo 749222522590925 10000 15 So AND HEATSINK ASSY c P 90206372400 ARE NOT 8 INSTALLED AT THIS LEVEL 5000000000004d8 682120 ORN10 5 Os o 3066 082150 2045009 AW6245 REV E COMPONENT SIDE 50805 50 9 00 0000500009 55 O 99 BUS WIRE JUMPER gt RTS PIN 2015000401 9 OOl MODEL 7 556245 REVEL MCE325 REF 05 MIN SEE SEPARATE PARTS LIST 1030 6245 00 UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCES ARE 3 INSTALL JUMPERS ON HEADERS J4 d5 46 47 016 017 JR JZO 8 24 AS SHOWN BY CROSSHATCHED SECTIONS ASSEMBLY 2 DO NOT USE ANY ADHESIVE SUCH AS GLYPOL ON TRIM Po
13. 90006464 000 A CAD GENERATED DRAWING THREADS EXT CLASS 2A oe D NOTES UNLESS OTHERWISE SPECIFIED ee Den SHT 1 OF 1 Title c nome cms benedil view 9000 6464 01 CAL 1 REVISIONS RELEASE TOFAGTOAY N 2 FRONT PANEL 3 R1 CHANNEL 1 C1 m R51 C18 R52 BILAT J28 CALL 1 zu B 114 B SHT3 5D 22K C19 100pF 47K U3 100pF C20 60 4K P1 JST B 3B ZR Co 4053 TI 1 14VO 1 LISTEN BUFFER R53 R55 pe NC3FDH 10 25 14V 4 TALK CH 1 4W A CH 1 1 50 Bon PANEL lt SHT2 6D 22K MIC 1 22 50 JACK SHT2 1D 5 TALK LSN1 G TALK CH 2 SHT3 7D L072 SN BUFFER 7 100 SHT2 1D DOK pi R49 R50 ia E MIC LO SHT2 1D Q A TALK J LOOP SS pea d A 87 AWIRE PANG D6 D7 THRU lt IHPR SHT2 2c 4W B PROGRAMMING 22K C21 10K R57 1 4004 1N4004 dad MIC PRE AMP 20dB op K O 14V C 1 Im PROGRAMMING 20 TC2 p 6 C7 4nF MONO 10K TRIMPOT UNBAL 01 Y DYN R7 R8 100K R65 C29 R66 HEADSET BAL D15 CHANNEL 2 CALL2 gt CONN 76 BILAT R77 C36 929647 01 03 3 01K lt lt SHT3 5D 22K C28 100pF 47K NC se JST B 6B ZR FB4 FB3 1
14. Title 6464 01G dwg Date 7 23 01 05 23 33 es 1 OGIE USMB 10 gt PANEL UA USMB LO paw CH 1 NG DYNAMIC MIC MIC SELECT PRE ON OFF TALK CH 1 DIFF H AMP H BUFFER BILAT LINE INPUT BAL 5 m o 1 2 UNBAL mr ui COM DYN MIC ER d 4 WIRE OUT gt HEAD T 7 MIC LO i MIC HI 3 SIDETONE Ne COM LIMITER ON OFF BALANCE HP LEFT 1 LOOP REGHT 6 TARS D SUB 25 FEM CH 1 2 SWITCH RR m Pa a tan PROGRAMMING REM MIC V 5112 wire ATEN x i4 WIRE SPKR MUTE 2 ISO gt EGG TALK 2 REM MIC em R MIC MTE ECEFER SENSE MIC HEADSET A CNE HIC TO up gt CH 2 LISTEN SIDETONE KEYS BUFFER BALANCE KEY2 LES DIFF AMP IFB CH 3 NZ CH 2 PROGRAMMING ON OFF PGM A H 4 HP ENG aika x d n C CHS P c o 3 NG O BD INE INPUT 4 Lr M d USMB 10 gt DIEF 4 I IVA S CH 3 4 USMB LO 1 8 CH 3 INPUT 5 8 lO cH a 4 WIRE OUT v 7 SIDETONE 7 N BALANCE PROGRAM PGM ASSIGN CH 3 VOLUME HD L PG H 4 WIR
15. Two wire 4 or four wire low output Four wire Output Termination Figure 2 4 4 wire output terminations 4 7 KOHM 4 7 KOHM When four wire outputs are used termination resistors must be installed for proper operation The output amplifiers are current sources and the output level 15 determined by the terminating 2 8 CSI 200 User Instructions CAUTION resistor values These resistors would normally be installed the cable connector but may be placed at any point in the signal path Recommended values are shown in X Program Inputs J14 and J15 The PROGRAM and inputs accept line level 0 dBu nominal balanced audio The program inputs are connected using 4 inch stereo phone plugs Figure 2 5 Connectors J14 and 15 SECTION FUNCTION Ip The MCE325 must be internally programmed to assign the program inputs to the intercom lines headphones or speaker output see Program Assignment Program volume to the headphones and speaker is controlled by the VOL control on the front panel External Speaker J27 The SPEAKER OUTPUT jack provides a bridging type output for an external speaker 8 ohms minimum The external speaker 15 connected using a 4 inch phone plug Figure 2 6 Connector J27 FUNCTION Speaker plus The MCE325 provides bridging type speaker output DO NOT LET EITHER SPEAKER LEAD CONTACT GROUND The external speaker 1s turned on and off by the front panel
16. but cannot 1 3 be assigned to four wire channel The program assigned to channels 1 interrupted during talk output Speaker Output 14 inch phone jack is provided for connection of an external speaker 8 ohms minimum impedance The speaker output 1 compatible with MCS325 speaker Auxiliary Connector Standard Options on the 25 pin female D Sub connector are Unswitched microphone output ISO connection to VCP6A VCP12A VCP12B Microphone on off switch Remote headset 1 2 3 4 5 Remote panel microphone 6 Separate inputs for 10 to 15 volts DC and 17 to 24 volts DC 7 Common ground circuit 8 Four wire channel and inputs 9 Remote speaker mute 1 outputs Programming Three methods of programming are used 1 Front panel programming via the channel selector and operation buttons 2 Internal programming via circuit board DIP switches 3 Internal programming via circuit board jumpers The most commonly programmed options are assigned to the front panel for convenience Detailed information on internal programming is provided in Section 2 Installation Detailed information on front panel programming 15 provided in Section 3 Operation Power The MCE325 is designed for local powering and 15 supplied ready for use with either 115 or 230 VAC but not both The unit may also be powered from an external DC source connected at the Auxiliary J22 connector on the rear panel For information on c
17. 2693 114V 4 1 MOLEX FFC 39 51 3304 1 bsa 2 sh 5 MX1A 11GW 4 SPKR p 5 PNL ANT DS7 CALL U 7 4 MX1A 11GW 8 Sa 5 LA 9 AUN DS6 16 CH 1 VU NE 11 CALL LIGHT MX1A 11GW 12 13 Te 055 14 SPKR ON LE 15 PNL 4 CALL 6 4 A ps4 12 3 18 2 19 110 20 CH 1 7 psa MXTA 1T1GW 22 23 24 229 25 DS2 27 11GW 28 29 ANT DS N C 30 MXTA 11GW 559 WU 31 58 57 MXTA 1IGW 56 MXTA 1TIGW EE C MX1A 11SW 5 6 54 MAXTA TIGW TIGW ES SZ E Si MXIA TIGW YA R2 VOLUME 2 10k AUDIO R 1 VOLUME 1 10K AUDIO R3 VOLUME 10K AUDIO c o onse wr Mp EST E ec lt 22 sretrve 7 4 IS MOLEX FFC HEADER 39 51 3304 RTS 2006009600 1 ARE NOBLE POTS f VO12LPV220MM1OK15A RTS 1406003901 2 DS9 IS STANLEY RED LED ESBR3431 RTS 1801001900 1 CHERRY KEYSWITCH MX1A 11GW WITH GREEN LED RTS 1911004200 8 REQD HG UNLESS OTHERWISE SPECIFIED CONTRACT NO Ko SL TEMG Burbank California Drawn G MORALES SCHEMATIC DIAGRAM FRONT PANEL BOARD 25 USER STATION Issued SIZE FSCM DWG NO REV IC 60572 506246 DATE MA
18. DISCLAIMS ALL OTHER WARRANTIES AND CONDITIONS EITHER EXPRESS OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT OF THIRD PARTY RIGHTS 4 Limited Liability The liability of the Company for any claims arising out of this License based upon the Soft ware regardless of the form of action shall not exceed the greater of the license fee for the Software or 50 TABLE Description amp Specifications 1 1 Bros rrr 1 1 Eee 1 1 ea 1 1 Front Panel Features oh 1 2 Channel Selector and Operation Buttons 1 2 Volume 2 euis eae UE 1 2 Sidetone Nulling 5 1 2 Connections Inputs and 5 1 2 t uaa cd ied hem Ge E AVE eh dem de 1 2 Panel Micr phone Jack 5 oo a4 HA 1 2 hear Panel eauUres s 2 aw dox MERS HAL ESS 1 3 Imee IMCS gt 22 ene hee Sn bee Soe Se 1 3 External Program INPUT CAE ER EU e REC UE 1 3 cler Ol MC ccce 1 4 Auxiliary s
19. Zu Mm 60 4K 20 0K C30 LL 1 1 73 73 R4 100 25 D16 SHT2 1D papa rs 100K 1 914 LISTEN AG R67 RE Calla MONG BUFFER 6 CH 2 7 FBX ZFB1 100K 1 22 50 C5 LSN2L gt 47 16 199 12 SHT2 6C TLO72 1 50 100K 73 73 100 25 301 SHT3 7D R74 1 R10 R69 C6 14 R13 pou 1nF MONO v 7VO TLO72 R11 Q1 C31 R70 BUFFER 620 2N5087 7V 10K CH 2 14V R14 1990 16 10K TRIMPOT R18 EA lt __ S813 1B 100 1 4 92 R80 C38 81 CARB MIC 815 ___ CALL 3 CHANNEL 3 CONN 22K SHT3 5D 29K a 100pF 47K R91 BILAT R92 C44 SN B 100 an SHT2 6B L 7VO 37 14 C11 R21 C39 60 4K gt 5 C41 1 14VO 1 sa E 1 50 12K 882 100 ppa NC3FDH 1 50 cd 46 C12 LISTEN BUFFER NZ 10 25 ON CE 3 22K CH 3 4 gt P ali 929647 01 03 E SHT2 6C 7V 7 eN SHT3 7D tee R89 7 100K R843 R85 7VO 14V C136 SHT2 7A TLO72 A 010 57 Di VO U2 UN 22K 10K TALK R88 1N4004 1N4004 R23 woes C40 BUFFER 00 414V R22 22K 1 50 J7 CH 3 NZ o 22K R24 4WIRE B 14V 100 PROGRAMMING 100pF 10K TRIMPOT ii O 5 o nada AWIRE P A R38 CHANNEL 4 100 R96 C48 R97 R107 BILAT R108 C53 NE5532 C8 1 50 CALLA gt No m AR SHT3 5D 2
20. and B inputs to the left Assigned headphone Not assigned pins 2 amp 3 shorted Assigned pins 1 amp 2 shorted Assigns mono mix of the PROGRAM and B inputs to the right Assigned headphone Not assigned pins 2 amp 3 shorted Assigned pins 1 amp 2 shorted Assigns mono mix of the PROGRAM and B inputs to the speaker Assigned Not assigned pins 2 amp 3 shorted Assigned pins 1 amp 2 shorted Selects four wire CH A input Off not used pins 2 amp 3 shorted Off On when LISTEN 1 button is on pins 1 amp 2 shorted Always on pins 3 amp 4 shorted Selects four wire CH B input Off not used pins 2 amp 3 shorted Off On when LISTEN 2 button is on pins 1 amp 2 shorted Always on pins 3 amp 4 shorted Selects unbalanced or balanced dynamic mic input Unbalanced mic input Unbalanced pins 2 amp 3 shorted Balanced pins 1 amp 2 shorted J19 and J20 jumpers should be in off positions when two wire lines are used Figure 2 2 Internal switches jumpers and level trimmers Jo AA pra 122 to f e o T e X 4 9999 5 sogo 1 3 85 3 e D hh 4 999 828 66 5 5 6 z 9 6 5 S z ui zz 28 eo 2 Ce EE de 8 9 10 11 10 12 23 5 55 13 J7 Intercom Line Channel Confi
21. one for listen In four channel mode each two wire line uses one channel selector button for both talk and listen 51 052 253 054 055 056 two channel mode should be selected under only two circumstances 1 When only one or two two wire lines are connected to channels one and two only 2 2 CSI 200 User Instructions 2 When a two wire line is connected to channel one and four wire line is connected to channel B For all other intercom line configurations that use two wire lines DS3 must be set to the on position for four channel operation Table 2 2 Jumper functions and default settings Jumper Number Jumper Function Default Setting 4 Assigns PROGRAM input to two wire CH 3 or four wire CH Not assigned Not assigned pins 2 amp 3 shorted Assigned pins 1 amp 2 shorted IFB to 3 Assigns PROGRAM B input to two wire CH 4 Not assigned Not assigned pins 2 amp 3 shorted Assigned pins 1 amp 2 shorted IFB to 4 Selects two wire CHI and CH 2 or four wire CH output See 19 Two wire operation for CH A input and 2 selected pins 2 4 3 shorted Four wire CH output selected pins 1 amp 2 shorted Selects two wire CH 3 and CH 4 or four wire CH B output See J20 Two wire operation for Ch B input CH 3 and 4 selected pins 2 4 3 shorted Four wire CH output selected pins 1 4 2 shorted J16 Assigns mono mix of the PROGRAM
22. quiescent 900 mA max 1 72 H x 8 2 W x 8 D 44 mm x 208 mm x 203 mm 4 25 lbs 1 93kg Thermo plastic front panel aluminum case light gray 1 5 Connectors Intercom Line Connector Dynamic Mic Carbon Mic Auxiliary Connector Program Inputs Speaker Output Panel Mic MCS325 Specifications XLR type 3 pin male female loop through on two wire channel 1 2 or four wire channel Female only on two wire channel 3 and 4 or four wire channel B XLR type 6 pin female 14 inch phone jack 3 circuit 25 pin female D Sub 14 inch phone jack 3 circuit 14 inch phone jack 3 circuit 14 inch phone jack metal busing 3 circuit MCS325 15 designed for use with MCE325 but may also be used as a general purpose monitor for program material Impedance Power Rating Sensitivity Frequency Response Free Air Resonance Distortion Stray Magnetic Field Mechanical Noise 6 ohms DCR3 3 to 7 ohms SW RMS continuous 90 dB 2 dB 2 83 volts one meter on axis averaged over one octave bands centered at 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz and 8 kHz when enclosed in a sealed box of 1 3 liters volume 200 Hz to 10 kHz 4 dB on 1 10 octave measurement in 1 3 liter sealed box 200 Hz to 250 Hz Less than 10 5W at resonance Less than 1 gauss at 1 cm from chassis Unit to be free of buzzes and rattles at 5 W sine wave input from 100 Hz to 10 kHz Figure 1 2 Standard two channel two wire configurati
23. right headphone output It should measure 44 dBu or less 11Set the 2 4 volume control to minimum Measure noise across the speaker output The meter should read 44 dBu or less 4 12 CSI 200 User Instructions 12 ON button The meter should read 38 dBu or less Turn off the button Noise measurements the following steps were made using 400 Hz to 30 bandpass filter with 40 dB of gain 13 Turn on MIC ON switch Measure noise at UI pin 1 mic preamp out The voltmeter should read 26 dBu or less 14 Turn on the PANEL MIC button The meter should read 37 dBu or less 15 Turn all buttons off 16 Measure noise at U12 pin 7 program A preamp out The voltmeter should read 51 dBu less 17 Measure noise at U12 pin program preamp out The voltmeter should read 51 dBu less 18 Measure noise across intercom channels 1 through 4 All should measure 50 dBu or less 4 13 4 14 CSI 200 User Instructions PARTS LISTS Packaging Assembly 9000 6464 00 Table 5 1 Reference PD6464 Drawing Section 6 1 User Manual User Station _ 3 momo Assy 200 Termination Plug Keycap Printed TALK 4 Keycap Printed IFB 1 Keycap Printed PAGE Final Assembly MCE325 9010 6464 00 Table 5 2 gt Reference AS6464 Drawing Section 6 4 5 24 Case Screw 9160 6305 00 Screw
24. the SPKR LED should turn off Remove the ground connection 9 Activate speaker dim by grounding U15 pin 9 10Adjust R157 to the maximum clockwise position The speaker output should be 5 5dB 1 dB below the level set in step 7 11Adjust R157 to the maximum counter clockwise position The speaker output should be 39 5 dB 2 dB below the reference level set in step 7 12Reset R157 to the maximum clockwise position and remove the speaker dim ground U15 pin 9 13Set the signal generator to 1 dBu 100 Hz The speaker output should be 10 8 dBu 2 dBu 14Set the signal generator to 1 dBu 10 kHz The speaker output should be 17 5 dBu 2 dBu Level and Frequency Response Program to Headphones and Speaker Program A to Left Headphone 1 Set all front panel buttons to off Set all volume controls to minimum 2 Set program jumpers J16 J17 and J18 to assign PROGRAM A and PROGRAM B inputs to the headphones and speaker pins 1 amp 2 shorted on all three jumpers 3 Remove the signal generator from channel 1 and reconnect it to the PROGRAM input J14 tip and ring Set the signal generator to 0 dBu kHz Set the PGM VOL control to maximum Measure the level at the left headphone output It should be 1 3 dBu 2 dBu N Set the signal generator to 0 dBu 100 Hz The left headphone output should be 0 8 dBu 2 dBu 8 Set the signal generator to dBu 10 kHz The left headphone output should be 3 8 dBu 2 dB
25. 0 1813 lt lt SHT3 2D LISTA lt 22 72 SHT3 2D 1 141 14V 10K Cage VAL ve 22K 59 5 ya E 100 25 2159 130 1nF 131 1D SHT1 5A 1 50 SHT3 2D WA 22K 1 50 M O R187 20 0K 10 0K 14V TC4 lt C100 y C10 C103 2 7 lt HPR 1 1 1nF d 10 25 R188 SHT1 5B 14V J20 100K 1 50 A C74 R135 Y v 929647 01 04 14 104 100pF Pine 4458 RP5F In TLO72 10K 22K R132 SHT3 2D LIST4 lt m rs 20 8133 75 lt YY T Sn 1 SPKR DIM lt SHT3 2D PANEL 4 7V C81 EN SPKR JACK J23 J27 C82 U34 MLSS100 3 MN 114B R138 1nF R139 1 50 Gi e 20 0 10 0 1 SPKR DIM 1 ADJUST MIN 6dB P TO R152 MAX 26dB 20K TRIMPOT 200 LIN C79 R142 100pF 10 140 TL072 C109 PGMB R153 1000u 9 Q NININININININININ INIo SIAI 0000 ROD 20 0K SHT1 6B 44 45 1 1 14V 160K 27 27 on R141 C80 R154 O 10 0 1nF 17 25VDC SOURCE 1 NN 929647 01 03 7V ON ib C83 C108 C110 C111 PGM ASSIGN p m 2p lt 100 0 1uF 0 1uF TO HDST L 3 40 47 10 25 TLO72 17 47V 929647 01 03 PGM ASSIGN TO HDST R ON OFF 3 4B J18 929647 01 03 PGM ASSIGN Ee NZ NOTES SEE SHEET 3 OF 3 1 TO SPEAKER Title dinis MOTHER BOARD MCE325 2
26. 1 Drawing Section 6 19 Capacitor CD 100 100V 150181011 Capacitor CD 100 100V 1501R1011L 5 4 CSI 200 User Instructions Table 5 6 Reference 9027 6245 01 Drawing Section 6 C C21 Capacitor CD 100pF 100V Capacitor CM 0 1uF 50V 2 26 2 2 C 3 3 Capacitor CD 100 100V 5 C42 CD 5 Capacitor 1nF 50V 52676101 Capacitor EL 10uF 50V 51821110 5 5 Table 5 6 Reference 9027 6245 01 Drawing Section 6 Capacitor EL 10uF 50V 51821110 67 Capacitor Mylar InF 100V 1514R1022L 68 Capacitor EL IOuF 50V 51821110 zi n n E C8 1 2 8 0 1 on cs C C C92 C Capacitor CM 50V 52676113 NN NN NN Capa Conci CM OE Capa PONS _ Capacitor 8 8 8 8 8 IN 9 9 9 9 9 5 6 CSI 200 User Instructions Table 5 6 Reference 9027 6245 01 Drawing Section 6 11 12 13 14 15 16 2 20 21 22 4 D5 ic 522142 D7 PT B1 B2 B3 T JI 10 14 15 16 17 18 J2 J20 Diode 1N4004 Diode 1N4004 Diode 1N4004 Diode 1N914B Diode 1N914B Diode 1N914B Diode 1N914B Diod
27. 24 Bit 93C56AN NA 1603013800 Assy Software Version 1 6 9020634816 U3 Analog Switch CD4053BE 46638 1 03 U30 Quad 2 input NAND 4093B 160340930B ES IC Dual Low noise Op Amp TLO72 1603013500 IC Dual Low noise Op Amp TLO73 1603013500 3 0 4 5 6 7 J4 J5 J6 J7 U U U U U U U IC Dual Low noise Op Amp TLO74 1603013500 4 40X3 8 1008403500 5 5 X X X IC Analog Switch CD4053BE 46638P1 5 5 12 CSI 200 User Instructions PC Board Assembly Front Panel 9030 6246 00 Table 5 7 Reference AS6246 Drawing Section 6 RI R3 Pot 10K Ohm Audio 1406003901 LED Super Bright Red 1801001900 DS1 DS8 LED Super Bright Yellow 1801002200 51 58 Keyswitch No LED 1911004300 5 14 CSI 200 User Instructions SECTION DIAGRAMS 6 2 CSI 200 User Instructions Date 7 23 01 05 20 45 A Revised PER Eco2e92 aha PER 2619 12440 INSTALL LED 9 PLACES WITH THE ANCDE LONGER LEAD ON THE SIDE SEE SEFARATE FARTS LIST 90200446 00 SIZE FSCM NO DWG NO NOTES UNLESS OTHERWISE SPECIFIED ELLE 2240 UNLESS OTHERWISE SPECIFIED OTHERWISE SPECIFIED CONTRACT
28. 2K 100pF ATK 49 60 4 20 0K 1 50 gt md 196 196 HMS PMS gt XX SHT3 2D R98 Roo 100pF SHT3 2D LISTEN C55 ba L US BUFFER Halos SHT2 4D RP2F CH 4 22K 22K 6 22K lt 7 R26 R27 14VO LSN4 gt 47 16 22K SHT2 50 TLO72 7 BUFFER 1 o oa 200 22K D4 4 gt 22 KEYA4 SHT3 7D 4 C R105 a 15 1N914 SHT3 20 R100 R101 SE 7 9305 vy DS 7VO R30 1 914 TLO72 12 13 29 1nF KEY3 lt 22K 10K R104 1N4004 1N4004 7 5 1 14V C50 100K 47V SHT2 1D RP2B WY E R31 D2 Y 22K RP2D aay 51M M ma penta mai 100pF 10K TRIMPOT VM 1 914 lt _jSIPETONE AN NOTES SHEET 3 OF 3 R32 100K ui TRIMPOT 14V C13 1 50 14V R33 gt VOX REC C14 15 7V 1N914 SHT3 1A 100 25 4 THESE DRAWINGS AND SPECIFICATIONS ARE THE Title R34 D3 100K SU OF TELEX COMMUINCATIONS INC AND DATE SCALE S CHEMAT D TAGRAM 22K 1 914 FOR ANY PURPOSE WITHOUT EXPRESS WRITTEN MOTHERBOARD 325 2N5210 R36 CONSENT DO NOT SCALE DRAWING Q4 ORCAD GENERATED DRAWING J IC GROUP ECAD SCHEMATIC 6245 FILE NAME COMMUNICATIONS INC BURNSVILLE MINNESOTA PLANT DIST B E 60 4W A LO 1D 10 25 4 WIRE A IN OdBu NOM 10dBu TO 8dBu C62 4W A HI 1D 10 25 C66 4W B LO 1D 10 25 4 WIRE B IN OdBu NOM 10dBu TO 8dBu C68 4W B HI 1D SHT1 1C 10 25 PROGRAM A J14 SN37A 14B C
29. 33 R4 R40 R41 R42 R43 R44 2 R5 R50 R31 CE R52 R53 CF 10K SERV XS CF 22K HIMNO TS CF ATK S samo CF 20K Reiser CF IK On sago I _ TG CF ATK Se URW I _ Resistor 100 Ohm 5 1 8W 52154012 5 0 CSI 200 User Instructions Table 5 6 Reference 9027 6245 01 Drawing Section 6 CF 20K URW R78 istor 5 R79 CF 10 nm 5 URW Xm Cr KON SE ag Re MP an 1 RW 5 kesson 207 Ob 1 RW aso eo 20K Ohm FE R94 istor CF R95 21 71 2 21 CF 10 Om CF 100K Ohm _ CF 20K Ohm HIMNO 7199 CF SS ag Resistor Network Ohm X 4 Pin T Common 09W 1411100207 Ras Network 22K Ohm Pin T Common 15W 1411220201 Table 5 6 Reference 9027 6245 01 Drawing Section 6 U16 noi U17 1 Ul6 IC Dual Low noise Op Amp TLO78 1603013500 1 Dual Low noise Op Amp NE5532N 53295000 IC Analog Switch CD4053BE 46638P1 IC Undervoltage Sense MC33064P 5 1603013700 IC EEPROM 10
30. 44 40 x 1 4 1008 4081 00 Valox Film 0 010 Thick 5 Label Programming and FCC Notice 9170 6776 00 Rubber Stick on Button 4501 5012 00 Lug Solder 16 1003 0003 00 5 1 Front Panel Assembly 9020 6261 00 Table 5 3 Reference AS6261 Drawing Section 6 7 Knob Program Volume MCE325 5 1 Lightpipe Call Indicator 4501 0062 00 12 Screw Thread Forming 51856 003 3 Connector Housing 3 pin 59958 003 E E ON Keycap Printed PANEL MIC 9150 6643 06 Printed SPKR 9150 6643 07 Printed 9150 6643 08 17 20 21 22 23 24 25 26 7 2 5 2 CSI 200 User Instructions Back Panel Assembly 9020 6262 00 Table 5 4 Reference AS6262 Drawing Section 6 Description RTS Part No Raus CE 3 O 00 _ soso OS Heatsink Assembly 9020 6324 00 Table 5 5 Reference 9020 6324 00 Drawing Section 6 Heatsink Model MCE325 9180 6324 01 IC LM4752T 5113860005 EM Adj Regulatro 3 Terminal LM317T 53290000 2 3 5 D Washer Nylon Shoulder 1006004000 Washer Compression 1006004100 Screw Cross 51845040 4477 Board Assembly 9030 6245 01 Table 5 6 Reference 9027 6245 01 Drawing Section 6 Capacitor EL 100uF 25V 51821524 Capacitor CM 0 1uF 50V 52676113 5 3 Table 5 6 Reference 9027 6245 0
31. 62 01 Date 7 19 01 NOTES TORQUE COMPRESSION WASHER DOWN UNTIL IT REACHES HALF ITS ORIGINAL THICKNESS APPLY THERMAL COMPOUND ITEM 9 AS INDICATED Time 02 05 07 PM steer _ 5 REVISIONS REVISION SU AND REDRAWN SEE ECO FOR DETAILS 73385 KS KS KS 4 13 01 DWG NO WAS AS6324 AR 9 51741 000 THERMAL COMPOUND 2 8 51845 040 __ 2 7 1006004100 _ COMPRESSION 216 50015 035 FIBER WASHER 21 5 1 1006004000 SHOULDER WASHER 2 4 57896 000 INSULATOR SIL PAD 1131 53290 000 REGULATOR LMS17T 1 2 511386 000 LM4752T 1 1 191806324 01 HEATSINK O ol D S PART NUMBER DESCRIPTION 7 LIST OF MATERIALS C4 Aa ______ KS CS CSS KS APP CE UNLESS OTHERWISE SPECIFIED HEATSINK ASSEMBLY HOLE TOLERANC KK REMOVE ALL BURRS amp BREAK SHARP EDGES B94 11 1967 R1972 SEE TOLERANCES ARE FRACTIONS 21 16 A CAD GENERATED DRAWING FILE NAME 90206324_01E DWG Title C home cms benedil view 9020 6324 01 DWG MCE 325 AS6262 MODEL 25 TELEX DWG NO 99906 324 00 1 OF 1 DECIMALS ANGLES 060 30 030 010 MINNEAPOLIS MINNESOTA PLANT DIST DIST Date 7 23 01 Time 05 23 05 REVISIONS _ A REVISED PER ECO 3080
32. 71 R B TB 10 25 7 10 25 415 SN37A 14B C77 R B B 10 25 T C78 10 25 C61 7V S U13 14V J22 SHT1 6A 14 gt 20 0 10 0 NM 10K SPKR MUTE 1 1 4W A LSN 5 RP6A aM Mic gt ISO NN 7VO pos ___ gt 10K 18V IN 2 5 C63 5 RP6C 301 10 25 R173 COM __ gt 100pF 6dBu NOM lt 1 100K 4w BLoO gt 2 Ke 4W BHIL gt SHT1 4D 21 4dBu NOM 072 5813 7D 10 6dBu 4W A LO R119 lt x3 RP6D SHT1 6B R174 C90 2 SHT3 2D 0 USM 2 1 2 1 100 R120 C64 LIST1 X 27 355 10 0K inF SHT3 2D MOLEX FFC mm 7 RP5A RP5B 30 R1 N 22K 22K 7 J19 C67 929647 01 04 PGMLL gt 1 R124 1nF R125 14V 1D SHT1 6D PGM SHT3 2D 4 4 VOL 6A R177 100K 97 R176 C91 20 0 YY mum 2 R183 1 HY C137 R U14 VOL2 22 1 50 C93 R181 10 7V 1 50 92 94 95 2 7 69 SEE 506246 1nF 1 50 40 25 182 lt 100pF 4W B LSN 10K AUDIO POT 22K SHT1 8D LSN3 X Q 4 50 1 SHT1 4 5 14 C96 126 7D R180 50 6 NOM KATA MONO SW 2N5460 1K 7 Q10 R178 R127 C70 lt __7 gt 10 0 INE LSN2 5 SHT3 5D 1 SHT1 4C 21 10 25 98 SHT3 7D 1 5
33. C 25 dBu 43 5 mV 4 2 2 dBu 0 98 1 55 VAC 4 4 CSI 200 User Instructions Table 42 USMB frequency response and level check 55 dBu 1 4 5 7 3 dBu 0 28 0 57 VAC 45 dBu 4 35 mV 2 2 2 dBu 0 79 1 26 VAC 25 dBu 43 5 2 5 x2dBu 0 83 1 32 Table 43 Mic to line response 4 channel 2 wire mode INPUT INPUT FREQUENCY LEVEL OUTPUT LEVEL 45 dBu 0 8 2 dBu 0 56 0 89 100 Hz 45 dBu 0 8 2 dBu 0 56 0 89 100 kHz 45 dBu 0 8 2 dBu 0 56 0 89 VAC Two Channel Four Wire Mode 1 Remove the 200 ohm terminations from intercom channels 1 through 4 2 Program the 25 to be in two channel four wire mode See Table 2 3 configuration 6 for switch settings See Figure 1 11 for names of buttons in standard two channel mode 3 Connect 200 ohm termination resistors across the four wire and four wire channels Four Wire A J8 pins 2 and 3 Four Wire B J10 pins 2 and 3 Normally the four wire outputs would be terminated with 600 ohms for four wire operation but 200 ohms are used for testing purposes Set the MIC ON button to on Set all other front panel buttons to off Connect an AC voltmeter across the Four Wire A output The signal generator should still be connected to the mic input Set it to kHz 45 dBu Activate CH 1 TALK The output level should read 0 8 dBu 2 dBu 0 56 0 89 VAC 9 Connect the AC v
34. CE325 User Station with no program connected can be directly connected to the channel three key output of the first MCE325 activating channel three for talk from either station will now interrupt the program source and permit that station to talk on channel three Remote Microphone Switch A remote microphone switch may be connected at the auxiliary connector Connect mic switch high to pin 25 connect mic switch low to pin 10 or 11 When the switch is closed the microphone will turn on and the front panel MIC ON LED will illuminate When the remote switch 15 off the microphone may be turned on from the front panel When the remote switch is on however the microphone cannot be turned off from the front panel ISO Connection To connect RTS Model VCP6A VCP12A or VCP12B ISO Control Panel to the MCE325 connect the unswitched microphone output of the MCE325 pins 1 and 14 of the auxiliary connector to the four wire input of the VCP Control Panel connect the four wire output of the VCP Control Panel to either a four wire input or a program input of the MCE325 connect the logic contact output of the VCP Control Station to the ISO input of the MCE325 pin 12 of the auxiliary connector connect VCP common to pin 11 of the auxiliary connector External Headset An external headset may be connected to the auxiliary connector See Headset Requirements Connect headphone left to pin 5 headphone right to pin 18 and headphone common
35. E B 18 lon PROGRAMMING HG 10FF N 9112 WIRE __14 WIRE ASSIGN CH 4 CH 4 pu CALL SEND BUFFER BILAT FF E PGM ASSIGN SPKR VOLUME 1 gt ION CH 4 LISTEN SIDETONE ioer BUFFER BALANCE CH 4 14V 7 BV 4 54 NS CJ RIGHT HEADPHONE AMPLIFIER SPECIFY CALL 115 LIGHT BANDPASS WAVE TO CMOS SWITCHES 230 SUPPLY LEFT M FILTER SHAPER CONTROL LINES OPERATION HEADPHONE AMPLIFIER WITCH UP CALL SEND CHI CH4 NE FRONT PANEL MICROPROCESSOR VU SWITCHES ces A up ADJUST TO 4 WIRE B DIFF 6 8 O 6 6 86 20 AMP SPEAKER o di b O Od 9 6 lt gt 4 4 HI UP 3 LE ODD Ty OUTPUT B LO Ed CE a FLOATING GT E m ANTE TEL LOAD REQUIRED SUMMING AMP CONTRACT NO TW TEM RITS Burbank California Drawn MORA BLOCK DIAGRAM MODEL MCE325 MODULAR COMPONENT ELECTRONICS 58 80578 226284 D 289 36464 01 SHEET 1of1 2 5 4 2 1 Title D TEMP BD6464 Date 7 23 01 Time 05 24 13 eT ETS X Title 56 718 01A cal Date 7 23 01 Time 05 24 51 REV
36. E TERMS OF THIS AGREEMENT DO NOT USE THIS PRODUCT PROMPTLY RETURN THE PRODUCT TO THE PLACE WHERE YOU OBTAINED IT FOR A FULL REFUND The installed software as supplied by the Company is licensed not sold to you for use only under the terms of this license and the Company reserves all rights not expressly granted to you You own the product or other media on or in which the Software is originally or subsequently recorded or fixed but the Company retains ownership of all copies of the Software itself 1 License This license allows you to use the Software for internal purposes only on a single product in which it was installed 2 Restrictions a You may not market distribute or transfer copies of the Software to others or electronically transfer or duplicate the Software YOU MAY NOT REVERSE ENGINEER DECOMPILE DISASSEMBLE MODIFY ADAPT TRANSLATE RENT LEASE OR LOAN THE SOFTWARE OR CREATE DERIVATIVE WORKS BASED ON THE SOFTWARE OR ANY ACCOMPANYING WRITTEN MATERIALS b The Soft ware and the accompanying written materials are copyrighted Unauthorized copying of the Software including portions thereof or the written materials is expressly forbidden c You understand that the Company may update or revise the Software and in so doing incurs no obligation to furnish such updates to you 3 Limited Warranty The Company does not warrant that the operation of the Software will meet your require ments or operate free from error The Company
37. EST Robe e NA eek OA eee Ee eS OBES ey eee OA eS 4 12 Program EoGKOUE bok thom qus d A A DR VALUE ee 4 12 CPV 4 12 Parts Lists 5 1 Packaging Assembly 9000 6464 00 5 1 Final Assembly 25 9010 6464 00 5 1 Front Panel Assembly 9020 6261 00 5 2 Back Panel Assembly 9020 6262 00 5 3 Heatsink Assembly 9020 6324 00 5 3 Main PC Board Assembly 9030 6245 01 5 3 PC Board Assembly Front Panel 9030 6246 00 5 13 Diagrams 6 1 iii 1 DESCRIPTION amp SPECIFICATIONS Description General MCE325 is a four channel programmable intercom station It may be used as a headset station or With the addition of the MCS325 Modular Speaker as a speaker station It may be mounted in a console or equipment rack via optional mounting kits The MCE325 be used with either two wire or four wire intercom lines or a combination of both In this manual and in the labeling on the MCE325 references to channels 1 2 3 and 4 indicate two wire lines references to four wire A and four wire B indicate four wire lines The MCE325 be interfaced
38. G Hazardous voltages exist inside this equipment Disconnect the line cord before opening the equipment or attempting any internal programming or adjusting General Prior to installing the MCE325 it may be necessary to change some of the internal programming to suit your particular application Table 2 1 and Table 2 2 list the functions for the DIP switches and jumpers which are used for internal programming Also shown are the default settings that were pre programmed at the factory If your application requires settings that are different from the defaults you will have to remove the top cover of the unit see Figure 2 1 and make the required changes If you do change the internal programming it may be useful to note the changes for future reference The locations of the DIP switches and jumpers are illustrated in Figure 2 2 DIP switch programming is accomplished by setting switches to the off or positions Jumper programming is accomplished using shorting jumpers By inserting the jumpers to short the appropriate pins a function 15 either assigned or not assigned Pin 1 of each jumper is indicated by a square symbol in Figure 2 2 for reference when making changes Also shown in Figure 2 2 are trimmers for adjusting the sidetone and speaker dimming levels Usage of the DIP switches jumpers and level trimmers 15 described in the following paragraphs 2 Figure 2 1 cover removal WARNING DISCONNECT AC POWE
39. GE CHANNEL SELECTOR BUTTON USAGE CHT CH2 WOLD Configuration 1 Two 2wire lines CH 1 amp CH 2 Default configuration CH 1 TALK LISTEN 2 TALK CH 2 LISTEN Configuration 5 Two 2 wire lines CH 3 amp CH 4 One 4 wire line CH A CH A TALK CH A LISTEN CH 3 TALK amp CH 4 TALK amp LISTEN LISTEN Configuration 6 Two 4 wire lines CH amp CH A TALK CH A LISTEN CHB TALK CH B LISTEN 3 5 3 6 CSI 200 User Instructions MAINTENANCE Preventive Maintenance Clean the unit and verify its performance periodically Factory Support Information Factory support information 1s located on the first page of this manual Corrective Maintenance NOTE WARNING Hazardous voltages exist inside the MCE325 Attempting diagnosis repair or adjustment with the AC line connected could result in serious injury or death These servicing instructions are for qualified personnel only Access 1 Reference the AS6464 drawing 1n section 6 Remove the four long screws item 4 and the two short screws item 5 2 Lift off the top cover 3 Pull the front panel slightly forward to clear the carbon mic jack on the main circuit board Lift the front panel slightly while sliding the back panel toward the rear and out of the lower case The MCE325 may now be operated for troubleshooting when reassembling the bottom cover make sure the rubber button on the inside of the bottom cover item 7 is towa
40. ION ucc LISTEN TALK LISTEN CALL PANEL SPKR MIC ON ON 25 Pin Auxiliary a 4 wire A In I a m internal jumpers and DIP switches set 4 wire B In per configuration 6 in Table 2 3 Ch3 4 4 wite B Out Ch 2 PgmA In Program Audio Source opt Figure 1 7 Multiple interconnected stations in four channel two wire configuration with two channels used for IFB s MCE325 BUTTON CONFIGURATION TW Intercom System oti ais IFB 1 Program pa Audio Source Internal jumpers and switches set B In IFB 2 Program per configuration 2 in Table 2 3 Audio Source In addition J4 and J5 should 25 Pin Auxiliary be set to short pins 1 amp 2 J16 17 amp 18 control routing of a program to MCE325 headphone amp speaker outputs MCE325 MCE325 Ch3 4 BE Ch 3 4 in e Pgm A In B in d B in 25 Pin Auxiliary j 25 Pin Auxiliary Ch 3 8 4 Key 1 8 MCE325 User Instructions Figure 1 8 Multiple interconnected stations using one four wire intercom channel two two wire channels for IFB s MCE325 1 2 4 wire A Out Ch 1 Send POTS Ch3 4 IFB 1 amp 2 Out TW Dry Coupler Pgm A In NB 1 Program Audio Source ___ POTS In L l e IFB 2 Program Audio Source Coupler _ 25 Pin Auxiliary 4 wir
41. ISIONS ZONE REV DESCRIPTION DATE APPROVED REVISED SPKR AND FUSE LOCATION PER ECO3277 11 26 90 19 00 fo0000000000 0 0000000000000 7 98 8 93 3212 18 37 1 25 NHA OH 25 292225522529 5522929522529092529050555290555290525250024552020 CRAN CONTRACT NO Ds res RTS SYSTEMS om DATE OUTLINE DRAWING 40 71 3 MCE325 PROGRAMMABLE USER STATION SEEN NENNEN SIZE DWG Be 1 66555 APPLICATION SCALE 1 1 06355A01 DWG SHEET 1 4 2 4 5 Title D TEMP OD6355 01A cal Date 7 2 ate 3 01 Time 05 25 30 PM __ so SHEET ONE m gh TEE 55 Lus 3 62 iy _ qq w RIS SYSTEMS T OUTLINE DRAWING cc OGRAMNAGLE USER STATO M ISSUED 10 12 59 SIZE FSCM NO DWG NO 60572 006355 se SCALE 1 1 06355A02 DWG SHEET 2
42. L button on the front panel for Operation see Using the Talk Off Feature VOX DS8 switch 58 turns the voice activated microphone circuit on or off Voice activation can be used with the panel microphone a headset or a remote microphone connected at the rear panel There is no adjustment for VOX sensitivity 2 5 Program Assignment IFB Option J5 416 418 Jumper J4 assigns PROGRAM A to two wire CH 3 or four wire CH B with interrupt during talk IFB A Jumper J5 assigns PROGRAM B to CH 4 with interrupt during talk IFB PROGRAM B 1 not used in four wire mode Jumpers J16 J17 and J18 assign the mono mix of both program inputs to the left headphone right headphone and speaker respectively Program volume to the headphones and speaker 15 controlled by the PGM VOL control on the front panel See Table 2 2 for Jumper settings See Figure 2 2 for locations of jumpers Balanced Unbalanced Dynamic Microphone Selection J24 The MCE 325 may be used with headsets having either a balanced or unbalanced dynamic microphone The MCE325 is pre programmed for use with an unbalanced microphone by shorting J24 pins 2 and 3 For balanced microphones remove the shorting jumper and reinstall it to short pins 1 and 2 Headphone Sidetone Trimmer Adjustment R37 The headphone sidetone trimmer R37 adjusts the loudness of your own voice heard in your headset when the microphone is on and the speaker 1s off It do
43. NO DWG REV pr ores UU Uc 3 5 9 A c c T cc 4 le Title D TEMP OD6355 04 Time 05 03 09 Date 7 23 01 _ seer sucer Ba REVISIONS FEE REV DESCRIPTION NOTES BENE NE STATU LA REVISED PARTS LIST NO 3238 B EXTENSIVE CHANGES SEE eco 60605 05 c DELETE __ 61255 125 85 USER MANUAL IN PLASTIC BAG 2000hm TERM PLUG ASSEMBLY PLASTIC BAG MCE325 UNIT SEE DETAIL A SERIAL NO LABEL No w KEYCAP ASSEMBLY 13 REQD MCE325 PRODUCT LABEL 2 REQD PLASTIC 004 003 008 0011 0100 PART NUMBER DESCRIPTION ev LIST MATERIALS s nero ms uen DR 05 CK Jae TITLE AND UR DECIMAL SCALE PACKAGING DRAWING FLATNESS 305 INL TN 2 050 IN ee CONCENTRICIFY 010 TIR p 1 030 IN DO NOT SCALE DRAWING MODEL MCE325 lt FOLD AND STAPLE BAG 6 XXX 010 IN PA tr MBPS TELEX MACHINED
44. OF 4 Title DATEMPYOD6355 02 Date 7 23 01 Time 05 26 07 PM REMSIONS ZONE REV DESCRIPTION DATE APPROVED SEE SHEET 9 240 1 8 93 a LN 6060606200086000600060000000006060 9620020200000 AA AP E UNLESS OTHERWISE SPECIFIED CONTRACT NO TENE E AY RIS SYSTEMS mw caurorwa usa ANS B84 11 1957 1972 DIMENSIONS ARE INCHES OUTLINE DRAWING 30 pra MCE325 PROGRAMMABLE R NEILSON 10 11 89 USER STATION MCS325 MODULAR LOUDSPEAKER TABLETOP OPTION FINISH 20519 oum 006555 4 50224850 Fe SCALE 1 1 06355A03 DWG SHEET 3 OF 4 5 Title D TEMP OD6355 OBA cal Date 7 23 01 05 26 42 REVISIONS 2 LZONEREV DESCRIPTION DATE APPROVED SEE SHEET ONE 8 500 mm 1 lu m ma I NN lt D c 7 10 7 98 8 93 88 LG 5 1 180 2 56 CONTRACT NO m 7 RTS SYSTEMS aman carom us TOLERANCES ARE APPROVALS DATE mg ee Lo 25 PROGRAMMABLE USER STATION lu CONSOLE OPTION 10 85 ISSUED SIZE FSCM
45. R BEFORE OPENING UNIT REMOVE THESE SCREWS LEFT SIDE RIGHT SIDE LOOSEN THESE SCREWS LIFT LEFT SIDE OF TOP COVER AND SLIDE THE RIGHT SIDE BACK FAR ENOUGH CLEAR TAB FRONT PANEL BEFORE LIFTING UP Intercom Line Channel Configurations DS1 DS3 J6 J7 J19 amp J20 The four channels of the 25 may be assigned to intercom lines variety of ways Channel assignment 1s determined by the settings of switches DS1 through DS3 and jumpers J6 J7 9 and J20 There are six possible intercom line configurations These are listed in Table 2 3 together with the proper DIP switch and jumper settings for each Table 2 1 DIP switch functions and default settings Switch Number Switch Function Default Setting four wire CH output not installed off four wire CH output installed Off on four wire CH B output not installed off four wire CH B output installed on DSS two channel mode off four channel mode on Off Front panel setup lock out disabled off Front panel setup lock out enabled on Off Off Listen and talk muted during ISO off Talk only muted during ISO on CT Talk off transmit disabled off Talk off transmit enabled on 8 i ff VOX disabled off VOX enabled on NOTE terms two channel mode and four channel mode apply only to two wire lines In two channel mode each two wire line uses two channel selector buttons one for talk and
46. RCH 10 1989 56246 01 SHEET 1 of 1 2 Title D TEMP SD6246 Time 05 19 08
47. RIMMERS HEADSET CONNECTOR SPEAKER FUSE AC POWER CORD JACK INTERCOM LINE EXTERNAL AUXILIARY CONNECTORS CONNECTOR Rear Panel Features Intercom Lines Connectors J8 and J9 are parallel wired for loop through connection to additional stations These connectors are used either for two wire channels 1 and 2 input output or four wire channel A output The four wire channel input is connected at the auxiliary connector Connector 110 is used for two wire channel 3 and 4 input output or four wire channel B output but no loop through connector is provided for these channels The four wire channel B input 15 connected at the auxiliary connector The MCE325 presents a bridging impedance of 10 000 ohms to the intercom line and is designed for use with intercom lines having a 200 ohm line terminating impedance A 200 ohm termination plug is supplied connected to J10 to prevent channels three and four from oscillating when the MCE325 is in two channel mode External Program Input Two lA4 inch phone jacks are provided for external program input The station accepts line level balanced input The two program inputs are mixed internally and may be assigned through internal programming to right headphone left headphone external speaker or any combination of these In addition program A may be assigned through internal programming to two wire channel 3 or four wire channel A program B may be assigned to two wire channel 4
48. SPKR ON switch Auxiliary Connector J22 Four Wire Channel A and B Input The four wire channel A and channel B inputs are connected at the auxiliary connector as follows Table 2 6 Auxiliary connector 122 Ror cael A igh zr four che A Tew D chanel B ieh 21 Four wire channel B low The four wire inputs must be assigned using internal programming jumpers J19 and J20 before they be used as previously described Intercom Line Channel Configurations DS1 DS3 76 J7 J19 J20 2 9 Key outputs Expanded Option Four logic type outputs are available at pins 6 7 19 and 20 of auxiliary connector Table 2 7 Auxiliary connector 122 PIN FUNCTION CA CA Kay oupa There are internal pull up resistors on the CH 3 and CH 4 key outputs Pressing the CH 3 or CH 4 talk button will result in a logic high to low transition at the corresponding key output Logic high is approximately 13 VDC Logic low is less than 2 VDC There are no internal pull up resistors on the CH I and CH 2 key outputs These outputs will float until externally loaded The channel three and four key outputs may also be used to expand the IFB function allowing any of several 25 User Stations to interrupt a single point program source and talk on the interrupted channel For example if one MCE325 1s operating with PROGRAM assigned to channel three the channel three key output of a second M
49. Sin Using 8 Side Channels Assembled to an Mount Kit Using MCP3 Console MCE325 in MCS325 25 for Tabletop Use Electrical Installation AC Power and Fuse The Model MCE325 is pre wired for either 115 or 230 operation and the appropriate fuse 1s already installed The MCE325 uses 0 5 Slo Blo fuse 115 volt operation 0 25 Slo Blo fuse 230 volt operation A fused external DC source may be used instead of AC power if desired See External DC Power Source Intercom Lines 48 49 and J10 General Intercom line connectors J8 and J9 are parallel wired for loop through connection to other intercom stations These connectors are used for connection of two wire lines to channels one and two full duplex operation or for connection of four wire channel A output channel A input is connected at the auxiliary connector Intercom line connector 110 15 used for connection of two wire lines to channels three and four full duplex operation or for connection of four wire channel B output channel B input is connected at the auxiliary connector Connector Pin outs Table 2 4 Connectors J8 and PIN FUNCTION Common low side of line Two wire CH 1 or four wire CH A high output Two wire CH 2 or four wire CH A low output Table 2 5 Connection J10 PIN FUNCTION Common low side of line Two wire 3 or four wire high output
50. T jack mic input and reconnect it to intercom N Oo channel 1 Adjust signal generator to 5 dBu 24 kHz check frequency with frequency counter Set the MIC ON button to on Activate the CH 1 TALK button The MIC ON LED should turn off Attenuate the signal input by 20 dB Try turning on the MIC ON button It should not turn on Attenuate the signal an additional 10 dB Try turning on the MIC ON button It should turn on Adjust signal generator to 5 dBu at 22 320 kHz Try turning the MIC ON button on and off It should turn on and off as usual 0 Adjust the signal generator to 5 dBu at 23 520 kHz 4 10 CSI 200 User Instructions 11 turning MIC ON button on It should not stay on 12 Adjust signal generator to 5 dBu at 25 680 kHz 13 Try turning the MIC ON button and off It should turn on and off as usual 14 Adjust signal generator to 5 dBu at 24 480 kHz 15 Try turning the MIC ON button on It should not stay on 16Remove the signal generator from channel 1 Mic Kill Transmit Test 1 Set all front panel buttons to off 2 Connect a frequency counter an AC meter to the intercom channel 1 output 3 Transmit a mic kill signal on intercom channel 1 tap the CALL button 3 times then press and hold the CH 1 TALK key 4 Check that the signal on the channel 1 output is between 23 7 to 23 9 kHz at 9 8 dBu 2 dBu 5 Release the CH TALK button Call Transmit Test 1 Set all front pa
51. Ts ef MCE ZZS MOTHERBOARD R57 R73 2104 R37 RIS7 E G M SEE SCHEMATIC DIAGRAM 500245 m __ 60572 ASGZ45 NOTES UNLESS OTHERWISE SPECIFIED Tide Anh Bag Supply 357 001 BR E ex Title D TEMP AS6245 010 Date 7 23 01 12 3 PLACES SEE WIRING DETAIL N INSTALL LED LIGHTPIPE 2 PLACES AND APPLY SOLDERING IRON THE GUIDING PINS 2 PER LIGHTPIPE PROTRUDING FROM THE BACK OF THE FRONT PANEL BOARD ITEM 2 TO SET LIGHTPIPES PERMANENTLY IN PLACE ADD RED DOT TO ITEM 17 AND TO 2 ON FRONT PANEL BOARD TO INDICATE POLARITY OF THE CABLE ITEM 17 A INSTALL TRS JACK ITEM 14 SO THAT ONE ITS FOUR SIDES WILL PARALLEL TO THE TOP COVER WHEN TOP COVER IS INSTALLED DURING FINAL ASSY JACK TO BE TURNED CLOCKWISE WITH A WRENCH TO BRING ONE OF 75 SIDES PARALLEL TO TOP COVER ADD SHRINK SLEEVE 28 LONG ADD SHRINK SLEEVE 50 LONG NOTES UNLESS OTHERWISE SPECIFIED Title D TEMP AS6261 01 2 DA SEE WIRING DETAIL B Time 05 21 25 PM REwsEp per ecogsoso 8 27 90 6 PLACES CONTACT FINGERS BOTH ENDS REF 12 3 PLACES WIRING DETAIL WIRES ARE 28AWG STRANDED VINYL 3 LG WIRING DETAIL WIRES ARE 28 STRANDED VINYL 5 LG
52. USER INSTRUCTIONS MODEL 25 PROGRAMMABLE USER STATION 9350 6464 00 Rev J 7 2001 PROPRIETARY NOTICE The RTS product information and design disclosed herein were originated by and are the property of Telex Com munications Inc telex reserves all patent proprietary design manufacturing reproduction use and sales rights thereto and to any article disclosed therein except to the extent rights are expressly granted to others COPYRIGHT NOTICE Copyright 1995 2001 by Telex Communications Inc All rights reserved Reproduction in whole or in part with out prior written permission from Telex is prohibited UNPACKING AND INSPECTION Immediately upon receipt of the equipment inspect the shipping container and the contents carefully for any dis crepancies or damage Should there be any notify the freight company and the dealer at once WARRANTY INFORMATION RTS products are warranted by Telex Communications Inc to be free from defects in materials and workmanship for a period of three years from the date of sale The sole obligation of Telex during the warranty period is to provide without charge parts and labor necessary to remedy covered defects appearing in products returned prepaid to Telex This warranty does not cover any defect malfunction or failure caused beyond the control of Telex including unreasonable or negligent operation abuse accident failure to follow instructions in the Service Manual or the U
53. UTHORIZATION Be prepared to provide the company name address phone number a person to contact regarding the repair the type and quantity of equipment a description of the problem and the serial number s SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT shipments of RTS products should be made via United Parcel Service or the best available shipper prepaid equipment should be shipped in the original packing carton if that is not available use any suitable container that is rigid and of adequate size If a substitute container 1 used the equipment should be wrapped in paper and surrounded with at least four inches of excelsior or similar shock absorbing material All shipments must be sent to the following address and must include the Return Authorization Factory Service Department Telex Communications Incorporated West Ist Street Blue Earth MN 56013 U S A Upon completion of any repair the equipment will be returned via United Parcel Service or specified shipper collect End User License Agreement for Telex Software IMPORTANT Please read this document carefully before using this product THIS DOCUMENT STATES THE TERMS AND CONDITIONS UPON WHICH TELEX COMMUNICATIONS INC the OFFERS TO LICENSE THE INSTALLED SOFTWARE OR PROGRAM the SOFT WARE FOR USE WITH THE PRODUCT IN WHICH IT WAS INSTALLED YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT IF YOU DO NOT AGREE TO TH
54. able 3 1 summarizes the operation of the channel selector buttons for the various intercom line configurations Basically four wire intercom lines always use one TALK and one LISTEN button for intercom communication as do two wire lines when the station has been programmed for two channel operation When the station is operated in four channel mode however each two wire intercom line uses only one channel selector button to control both talk and listen and the MCE325 is pre programmed so that a channel is activated for both talk and listen when the button 15 pressed The 3 button action be changed via the front panel programming 0 that the button controls talk only with listen either always on or always off Panel Mic Headset Mic Selection The PANEL MIC button selects either panel microphone LED on or headset microphone LED Off Microphone On Off The MIC ON button turns the microphone on LED on or off LED off NOTE The MCE325 can be programmed via the front panel so that the microphone will automatically turn on whenever a channel is activated for talk The MCE325 may also be internally programmed for voice activated microphone VOX as previously described in Section 2 Speaker On Off The SPKR ON button turns the external speaker on LED on or off LED off Volume Adjustment Table 3 1 summarizes the operation of the volume controls for the various intercom line configurations The MCE325 is pre prog
55. d press each TALK button to select or deselect Channel ID The button s LED will indicate the Selected mode as follows Short LED blink Channel ID disabled default Long LED blink Channel ID enabled Four channel Listen When 25 1s operating in four channel mode each channel selector button may be individually programmed for one of three types of operation With the Four channel Listen submenu activated press each channel selector button one or more times to select the desired type of operation as follows Short LED blink 90 on 10 off Button must be pressed to talk or listen default Long LED blink 50 on 50 off Listen will always be button must be pressed to talk LED off listen will always be off button must be pressed to talk Mono The headphone output may be configured for either monaural or stereo operation With the Mono submenu selected press the Mono button one or more times to select the type of headphone output as follows Long LED blink 50 on 50 Yo off Stereo default Short LED blink 90 on 10 off Monaural Call Disable Call disable prohibits incoming or outgoing call indication and signaling on selected channels With the Call Disable submenu selected press each talk button to select the desired operation as follows Short LED blink 90 on 10 off Call function enabled default Long LED blink 50 on 50 off Call function disabled Button Lock But
56. detone trimmer see note below 2 Turn on the microphone 3 Activate one talk button at a time and speak into the microphone Slowly increase the volume and note the level of your voice in the headphones or speaker Adjust the corresponding sidetone nulling trimmer to minimize your voice signal Repeat for each channel being used making sure that only one channel is activated at a time NOTE There is also an internal true sidetone trimmer which allows the station operator to hear his or her voice when using headphones This sidetone signal is turned off when the speaker switch is 3 2 CSI 200 User Instructions turned to prevent feedback See Headphone Sidetone Trimmer Adjustment R37 for further details Sending and Receiving Call Signals To call a channel 1 Press the CALL button CALL LED s will flash to indicate call signal ready 2 Press and hold the talk button for the channel to be called the call signal will be transmitted as long as the talk button 1s held 3 When a response 1s received release the talk button to turn off the call signal Receiving a call When there 1s an incoming call the indicator LED above the appropriate channel selector button will flash Using the Talk Off Feature The talk off feature deactivates the mic switches of all remote user stations on a selected channel To use talk off 1 Press and release the CALL button three times in rapid succession the CALL LED s wil
57. e 1N4004 Diode 1N4004 Diode 1N4004 Diode 1N914B Diode 1N914B Diode 1N914B Diode 1N4004 Diode 1N4004 Diode 1N4004 Diode 1N4004 73 SHIELD BEAD 73 SHIELD BEAD 73 SHIELD BEAD 73 SHIELD BEAD 2404000100 Connector 3 pin Connector Audio Jack PC Mt 3 8 Jack PC Mt 3 8 Header 3 pin Header 3 pin Header 3 pin Header 4 pin 2007013400 Connector 6 pin 59958106 amoa 10 Connector Audio Connector Audio Transistor 2N5087 Transistor 2N5460 Transistor 2N5210 Transistor 2N5484 1602548400 5 7 Table 5 6 Reference 9027 6245 01 Drawing Section 6 5 8 CSI 200 User Instructions Table 5 6 Reference 9027 6245 01 Drawing Section 6 Resistor CF 100K Ohm 5 1 8W Resistor CF 47K Ohm 5 1 8W 52154020 5 9 Table 5 6 Reference 9027 6245 01 Drawing Section 6 CF 20 Om URW CF 20K SA AV aso Ohm FE TAN __ IGI CF SIM FE W I CF 100K SE aoa ISK SS URW I i 100K SuSE CF 30K R4 S URW 598 IE ME 20K Ohm 27 Ohm SEIN I R27 R28 4 R29 15 R32 R
58. e Ain a RCV POTS Coupler BUTTON CONFIGURATION Gu TALK IFB FB MIC ON ON LL LLL roma ches internal jumpers and DIP switches set Pgm in in per configuration 5 in Table 2 3 addition jumpers 44 and J5 should rumen TUM be sot to short pins 1 amp 2 J16 17 amp 18 control routing of 25 Pin Auxiliary pe 25 Pin Auxiliary program to MCE325 headphone amp Ch amp 4 Key speaker outputs POTS Plain Old Telephone Service interface Figure 1 9 four channel two wire configuration with two channels used for IFB s shown with TELCO interface MCE325 Standard TW Line Telos Ch3 4 IFB 1 amp 2 Out TW Dry Pgm In Program Audio Source 5 B in IFB 2 Program Audio Source Coupler BUTTON CONFIGURATION Internal jumpers and DIP switches set ma per configuration 2 in Table 2 3 In addition jumpers J4 J5 should ne Ju V nr 916 17 amp 18 control routing of program to 25 headphone amp speaker outputs POTS Plain Telephone Service Interface 1 9 Figure 1 10 Configuration for an ENG truck using one four wire intercom channel and two two wire IFB s MCE325 Chi 2 4 wire A Out Ch 1 13 4 Cellular au IFB 1 A I 4 wire In 2 _ ProReceiv
59. e signal level drops at least 35 AB from the reference level in step 3 8 Restore jumper J18 to short pins 1 amp 2 Test IFB B Set all front panel buttons to off Set all volume controls to minimum Move the 5 jumper to short pins 1 and 2 IFB assigned to channel 4 Check the output level across intercom channel 4 It should be 9 8 dBu 2 dBu Turn on the CH 4 TALK and MIC ON buttons The channel 4 output should drop at least 45 dB from the reference level in step 3 Turn off the CH 4 TALK and MIC ON buttons 6 Ground the Key 4 input short J22 pin 20 to pin 10 The channel 4 output should drop at least 45 from the reference level in step 3 N O1 7 Remove the Key 4 ground 8 Move the 5 jumper to short pins 2 and 3 4 8 CSI 200 User Instructions IFB Move the J4 jumper to short pins and 2 IFB assigned to channel 3 Remove the signal from PROGRAM input and connect it to the PROGRAM A input Set the signal generator to dBu 1 kHz 3 Check the output level across intercom channel 3 It should be 9 8 dBu 2 dBu 4 Turn on the CH 3 TALK and MIC ON buttons The channel 3 output should drop at least 45 dB from the reference level step 3 5 Turn off CH 3 TALK and MIC ON buttons 6 Ground the Key 3 input short J22 pin 7 to pin 10 The channel 3 output should drop at least 45 from the reference level in step 3 7 Remove the Key 3 ground 8 Move the J4 jum
60. er 25 Pin Auxiliary BUTTON CONFIGURATION a8 1 internal jumpers and switches set per configuration 5 in Table 2 3 In addition jumpers J4 and J5 should be set to short pins 1 amp 2 J16 17 amp 18 control routing of program to 25 headphone amp speaker outputs 1 10 MCE325 User Instructions Figure 1 11 MCE325 button configurations BUTTONS SUPPLIED WITH THE 25 Button Legends Standard on the 25 Additional Buttons for Optional Configurations F LISTEN TALK LISTEN PANEL SPKR ON SOME TYPICAL FRONT PANEL BUTTON CONFIGURATIONS 2 Mode Standard 2 Wire or 4 Wire 4 Channel Mode Aiternate Version 1 1 1 2 1 2 1 LISTEN TALK LISTEN TALK TALK IFB IFB L gt a 28 L PANEL SPKR IC ON 2 Channel Mode Alternate Version 1 4 Channel Mode Alternate Version 2 1 1 LISTEN K CALL PANEL SPKR MIC ON 2 gt BE p ae 5 2 Channel Mode Alternate Version 2 4 Channel Mode Alternate Version 3 1 1 LISTEN TALK TALK CALL 1 ON SPKR MIC ON ON 4 Channel Mode Standard 4 Channel Mode Alternate Version 4 1 1 12 TALK IFB CALL PANEL MI ll 1 11 1 12 MCE325 User Instructions INSTALLATION Internal Programming and Adjustments WARNIN
61. er 1s used CH2 VOL 2 This control adjusts the volume of channels 2 and or 4 to the right headphone when stereo headphones are used It adjusts the mono mix level of these channels when monaural headphones or an external speaker 1s used VOL This control adjusts the mono mix of program and program input at the rear panel and assigned via internal programming to the headphones and external speaker Sidetone Nulling Trimmers These trimmers are adjusted to prevent acoustic feedback when using a panel microphone along with an external speaker Connections Inputs and Outputs Front Panel DY Namic MIC HEADSET This connector accepts stereo earphone dynamic microphone headset with or without a mic on off switch CARBon MIC HEADSET This connector accepts a standard 3 conductor 14 inch phone plug The necessary phantom power is provided to power a carbon microphone or its electronic equivalent Panel Microphone Jack The MCE325 may be optionally fitted with a gooseneck panel microphone by removing the blanking plug located in the upper right corner of the front panel The panel microphone jack accepts specially made gooseneck microphones MCP 90 series which are available from RTS 1 2 MCE325 User Instructions Figure 1 1 25 front and rear panel features CHANNEL SELECTOR VOLUME DYNAMIC MIC PANEL MIC CONTROLS JACK OPERATION BUTTONS CONNECTOR SIDETONE NULLING CARBON MIC T
62. es not affect the actual level heard on the intercom lines This trimmer is preset so that your voice level in the headphones will be approximately 34 of the intercom line level To prevent feedback this signal 1s automatically turned off when the external speaker is turned on with the SPKR ON switch Speaker Dim Adjustment R157 When an external speaker is used switching the microphone on will cause the speaker level to attenuate The level of attenuation may be adjusted with the speaker dim trimmer R157 The minimum attenuation of 6 dB is preset at the factory R157 fully clockwise The range of adjustment is 6 dB to 40 dB Mechanical Installation Dimensional requirements for the various mounting configurations are illustrated in Section 6 Also allow an additional 4 0 inches 102 mm of rear panel clearance for connectors If the headset connector 1s remotely located See External Headset allow space between the cable and interfering sources such as TV monitors power supplies and equipment with internal power supplies The MCE325 has no special ventilation space requirements Assembly of optional mounting components is shown in Figure 2 3 2 6 CSI 200 User Instructions Side B Station Using an Mount Kit Tandem Side Rack Mount y Using an MCP1 Rack Mount Kit 25 in Portable e Unit Config 2 Rack Moun Console Mount Configuration MCE325 in
63. gurations Program Assignment IFB Option 45 Program Assignment IFB Option J6 Intercom Line Channel Configurations J20 Intercom Line Channel Configurations R37 Headphone Sidetone Trimmer Adjustment J19 Intercom Line Channel Configurations J16 Program Assignment IFB Option 418 Program Assignment IFB Option 10 J17 Program Assignment IFB Option 11 J24 Balanced Unbalanced Dynamic Microphone Selection 12 R157 Speaker Dim Adjustment 13 DS1 Through DS3 Intercom Line Channel Configurations 13 DS4 Front Panel Setup Mode Lock out 13 055 ISO 13 DS7 Remote Talk Off 13 DS8 VOX oo 2 4 CSI 200 User Instructions Table 2 3 Internal programming for the various intercom line configurations JUMPERS DST pa ps om n Configuration 1 Two 2 wire lines 1 amp 2 Default configuration Configuration 4 Two 2 wire lines CH1 amp 2 One 4 wire line Pins 2 amp 3 shorted Pins 1 amp 2 shorted Pins 2 amp 3 shorted Pins 1 amp 2 shorted Configuration 5 Two 2 wire lines CH 3 amp CH4 One 4 wire line CH A Pins amp 2 shorted Pins 2 amp 3 shorted Pins amp 2 shorted Pins 2 amp 3 shorted Configuration 6 Two 4 wire lines CH amp CH Pins 1 amp 2 shorted Pins 1 amp 2 shorted Pins 1 amp 2 shorted Pins 1 amp 2 shorted See Table 3 1for a summary of how the channel selector buttons wo
64. hanging the AC supply voltage configuration or using DC power see Section 2 Mounting Configuration Mounting configurations are illustrated in Figure 2 3 and include rack mount speaker station console mount headset station rack mount headset station desk top headset station and portable speaker station Some mounting configurations may require a remotely located microphone or headset These may be connected to the Auxiliary connector J22 on the back of the unit 1 4 MCE325 User Instructions MCE325 Specifications General Bridging Impedance to line Noise Contribution to 200 ohm Line Call Signal Frequency Talk off Frequency Microphone Preamplifier Maximum Voltage Gain Frequency Response Input Impedance Limiter Range Headphone Amplifier Maximum Voltage Gain Frequency Response Headphone Impedance Output Power Output Voltage Level Speaker Amplifier Maximum Voltage Gain Frequency Response Speaker Impedance Output Power per Amplifier Output Voltage Level Power and Mechanical Power Requirements Dimensions Weight Material Finish finish 10 000 ohms typical 90 dBu 20 kHz crystal controlled 24 kHz crystal controlled 54 dB 100 Hz to 8 000 Hz 3 dB 1 000 ohms 30 dB 30 dB 100 Hz to 8 000 Hz 3 dB 50 to 600 ohms 150 mW into 50 ohms 8 Vp p 30 100 Hz to 8 000 Hz 3 8 to 16 ohms SW into 8 ohms 16 Vp p 115 to 230 20 VA max 12 to 25 VDC 100 to 125 mA
65. hort pins 2 amp 3 Four Wire B input off 4 9 Panel Mic to Channel Test Turn all front panel buttons off Set all volume controls to minimum Remove the signal from the Four Wire input and reconnect it to the panel mic input J28 tip and ring it is easiest to connect to the back of the connector 3 Set the signal generator to 25 dBu 1 kHz 4 Turn on the CH 1 TALK MIC ON and PANEL MIC buttons 5 Check the channel 1 output It should be 0 9 dBu 2 dBu Carbon Mic to Channel Test Turn off the PANEL MIC and MIC ON buttons Only the CH 1 TALK LED should be Connect a 470 ohm resistor across the CARBON MIC HEADSET jack J3 tip and ring The MIC ON LED should turn on Remove the signal from the panel mic input and reconnect it to the CARBON MIC HEADSET jack 4 Set the signal generator to 11 2 dBu 1 kHz 5 Check the channel 1 output It should be 0 9 dBu 2 dBu 6 Remove the 470 ohm resistor from the carbon mic input VOX Test 1 Remove the signal from the CARBON MIC HEADSET jack and reconnect it to the DYN MIC HEADSET jack mic input J2 pins 1 amp 2 2 Setthe generator to 45 dBu 1 kHz Set switch 058 to the on position VOX enabled and note that the MIC ON LED turns on 4 Adjust the signal generator output level to zero and note that the MIC ON LED turns off 5 Reset DS8 to off Mic Kill Receive Test 1 Set all buttons to off 2 Remove the signal from the DYN MIC HEADSE
66. in the order presented Test Equipment Variac 15 MHz Oscilloscope AC Voltmeter Frequency Counter DC Voltmeter Balanced Audio Generator 400 Hz to 30 bandpass filter with 40 dB of gain Power Supply Test 1 Seta variac to 117 60 Hz and connect MCE325 to the variac Observe that each LED blinks on in sequence and then all LED s are off 2 Measure the voltage across the secondary of T1 between test points E7 and E8 on the main circuit board Vec 18 1 8 3 Measure the DC voltage across the 23 2 3 VDC SEC 66 terminals of bridge rectifier CRI 4 2 CSI 200 User Instructions 4 Measure the ripple V 140 5 Measure the regulated DC voltage at 026 pin 2 There should be no ripple VUu 62 13 85 0 3 VDC 6 Measure the mid voltage source at 017 pin 7 Vu17 7 6 93 0 3 VDC 7 Measure the 5 V source at the output of U27 pin 2 VUu 72 5 0 0 3 VDC 1 Set all internal jumpers switches as follows Switches Set all switches except 053 to the default settings listed in Table 2 1 Set DS3 to on This places the MCE325 in four channel mode Refer to Figure 1 11 for names of buttons standard four channel mode Jumpers Set all jumpers except J24 to the default settings listed in Table 2 2 Set J24 to the balanced mic position pins 1 and 2
67. l turn on to indicate talk off signal ready 2 Momentarily press the talk button for the channel to be deactivated This will cause the talk off signal to be transmitted 3 Release the talk button to end the talk off signal transmission Front Panel Programming NOTE Activating Setup Mode Press and hold the CALL button for 5 seconds the TALK 1 LISTEN 1 TALK 2 LISTEN 2 PANEL SPKR ON and MIC ON LED s will begin to flash This 15 the main menu Menu Selection Ending Setup The submenu names are listed under the switches Press the desired switch to access the submenu for that switch Press the CALL button from a submenu to return to the main menu press the CALL button again to exit from the main menu to the operating mode no submenu is selected from the main menu within 12 seconds after program mode activation the programming mode will time out and the 25 will return to normal operation If a submenu 15 selected however the unit will remain in programming mode until intentionally exited Submenus The following paragraphs describe each of the submenus The default or factory pre programmed setting 1s also indicated for each submenu 3 3 Channel ID The MCE325 be programmed so that when someone is talking on an intercom channel the corresponding listen button LED will flicker as they talk to provide visual indication of which channel is talking With the Channel ID submenu selecte
68. l up resistors when finished USMB Un Switched Microphone Balanced Frequency Response and Level Check Set all front panel buttons to off Connect a signal generator to the DYN MIC HEADSET jack mic input J2 pins 1 amp 2 Connect a 600 ohm resistor across the USMB output J22 pins 1 and 14 Connect an AC voltmeter across the 600 ohm resistor Verify the output levels for the input frequencies and levels in Table 4 2 A N Remove the 600 ohm resistor across the USMB output Frequency Response and Level Check Mic to Line Four Channel Two Wire Mode 1 Activate the MIC ON button All other front panel buttons should be off 2 Connect an AC voltmeter across the channel 1 output The signal generator should still be connected to the dynamic mic input 3 Activate the CH I TALK button 4 Verify the output levels for the input frequencies and levels in Table 4 3 5 Repeat for channels 2 through 4 by connecting the AC voltmeter across the appropriate output activating the appropriate TALK button and measuring the output level Table 4 1 Talk button vs output TALK BUTTON OUTPUT J8 pins 1 and 3 pins 1 and 2 FREQUENCY INPUT LEVEL OUTPUT LEVEL kHz 55 dBu 1 4 mV 1 3 dBu 0 49 0 98 45 dBu 4 35 mV 2 5 x2 dBu 0 83 1 32 VAC 25 dBu 43 5 mV 2 2 dBu 0 75 1 2 VAC 100 Hz 55 dBu 1 4 mV 0 5 x3 dBu 0 51 1 03 VAC 45 dBu 4 35 mV 4 2 2 dBu 0 98 1 55 VA
69. n off Remove the 100 ohm resistor across the ISO input 6 Reset DIP switch 053 to on and 055 to off O1 Remote Mic Switch Test 1 Set all buttons to off 2 Connect 100 ohm resistor from the remote mic switch input J22 pin 25 to circuit common 722 pin 10 and observe that the ON LED turns on 3 Remove the 100 ohm resistor Program Lockout Test 1 Set DIP switch DS4 to on front panel setup lockout enabled 2 Press and hold the CALL button for ten seconds and verify that the MCE325 does not enter program mode 3 Reset 054 to off Noise Checks 1 Connect a 150 ohm load across the dynamic mic input J2 pins 1 and 2 2 Connect an 8 ohm load across the speaker output Connect 51 ohm loads across the left headphone output 72 pins 3 amp 4 right headphone output J2 pins 3 45 Terminate each intercom channel into 200 ohms Set the MIC ON button to on Set the SPKR ON button to on Set all other front panel buttons to off N Oo 4A Set all volume controls to minimum Note Noise measurements in the following steps were made using a 30 kHz low pass filter with 20 dB of gain inserted between the AC voltmeter and 25 9 Set the 1 3 volume control to maximum Measure noise across the left headphone output It should measure 44 dBu or less 105 the 1 3 volume control to minimum and set the 2 4 volume control to maximum Measure noise across the
70. nel buttons to off 2 Transmit a call signal on intercom channel 1 tap the CALL button and while the call LED 1s flashing press and hold the CH 1 TALK key 3 Check that the signal on the channel 1 output is between 19 9 to 20 1 kHz at 9 8 dBu 2 dBu 4 Release the CH 1 TALK button Call Receive Test Set all buttons to off Reconnect the signal generator to intercom channel 1 Adjust signal generator to 5 dBu 20 check frequency with frequency counter Check that the CALL and CH TALK LED s are flashing Attenuate the signal input by 20 dB and check that the LED s are still flashing Attenuate the signal an additional 10 dB The LED s should stop flashing Adjust signal generator to 5 dBu 18 600 kHz Verify that the LED s do not flash 9 Adjust signal generator to 5 dBu 21 400 KHz 10 Verify that the LED s do not flash 11 Adjust signal generator to 5 dBu 19 600 kHz 12 Verify that the LED s do flash 13 Adjust signal generator to 5 dBu 20 400 kHz 14 Verify that the LED s do flash oN O N 15 Remove the signal generator and frequency counter ISO Test Set switch DS3 to off two channel two wire mode Set DIP switch DSS to on talk muted during ISO Set all TALK and LISTEN buttons to on N Connect 100 ohm resistor from the ISO input 722 pin 12 to circuit common J22 pin 10 Observe that the MIC ON LED turns on and the channel 1 and 2 TALK buttons tur
71. oltmeter across the Four Wire B output 10Turn off CH 1 TALK and activate CH 2 TALK 11The output level should read 0 8 dBu 2 dBu 0 56 0 89 12Remove the 200 ohm termination resistors o N Oo BR Sidetone Null Test and Adjustment This procedure verifies sidetone null operation and optimizes nulling for an ideal 200 ohm line termination Since actual intercom line impedance may vary from the ideal the MCE325 may have to be readjusted slightly during actual use 1 Reprogram the MCE325 to be in four channel two wire mode Table 2 3 configuration 2 Reconnect 200 ohm termination resistors across each of the four intercom channels Set the MIC ON button to on Set all other front panel buttons to off The signal generator should still be connected to the mic input Set it to kHz 45 dBu Activate the CH 1 TALK button Monitor the AC signal level at U5 pin 7 Oo FP Adjust R57 Sidetone 1 on front panel for maximum null minimum signal level at US 7 The signal should be 0 025 VAC or less 4 5 8 Repeat for channels 2 through 4 by activating TALK buttons connecting to the test points and adjusting the potentiometers as indicated in Table 4 4 True Sidetone Adjust 1 Configure the DYN MIC HEADSET jack for stereo mode See Section 3 MONO 2 Set all front panel buttons to off 3 Connect 51 ohm load resistors across the left headphone output J2 pins 3 and 4 and right headph
72. on BUTTON CONFIGURATION _ Connect to Standard TW memes te pee mE mm 1 6 MCE325 User Instructions Internal jumpers and DIP switches set per configuration 1 in Table 2 3 Figure 1 3 Standard four channel two wire configuration 25 BUTTON CONFIGURATION ALK ALK ALK TAL Ch 3 4 3 4 Intercom System Internal jumpers and DIP switches set per configuration 2 in Table 2 3 Figure 1 4 A four channel two wire configuration with two channels used for IFB s MCE325 BUTTON CONFIGURATION Connect to Standard Ch3 4 1 amp 2 out TW Dry B In IFB 2 Program Audio Source Internal jumpers and DIP switches set per configuration 2 in Table 2 3 addition jumpers 4 and J5 should be set to short pins 1 amp 2 416 17 amp 18 control routing of program to 25 headphone amp speaker outputs Figure 1 5 Configuration for one or two two wire channels and one four wire channel MCE325 Ch1 2 Connect to Standard BUTTON CONFIGURATION gt TW Intercom System A In a Program Audio Source opt MIC CE ii Internal jumpers and DIP switches set 25 Pin Auxiliary lt 4 wire B In per configuration 4 in Table 2 3 1 7 Figure 1 6 Standard two channel four wire configuration MCE 325 Ch1 2 s Out Ch 1 BUTTON CONFIGURAT
73. one output J2 pins 3 and 5 4 Connect an AC voltmeter across the left headphone output 5 Remove the signal generator from the mic input and connect it across intercom channel 1 Adjust the generator output to 1 dBu 0 69 kHz 6 Activate the 1 TALK button and adjust the CH 1 3 volume control R1 until you measure 11 2 dBu 2 82 VAC across the left headphone output 7 Disconnect the signal generator from intercom channel 1 Adjust the generator for minimum output and reconnect it across the DYN MIC HEADSET jack mic input J2 pins 1 amp 2 Readjust the generator output level to 45 dBu 1 kHz 8 Turn on the MIC ON button 9 Adjust R37 sidetone the 25 main board to obtain 8 7 dBu 2 1 at the left headphone output Level and Frequency Response Check Intercom Channel to Headphone Set all front panel buttons to off Remove the signal generator from the mic input and reconnect lt across intercom channel 1 Adjust the signal generator output to 1 dBu 1 kHz Preset the CH 1 3 volume control to the 2 o clock position Activate the CH 1 TALK button The left headphone output level should be 11 2 2 dBu 2 2 to 3 6 6 Adjust the CH 1 3 volume control to measure 11 2 dBu 2 8 VAC at the left headphone output Check for no distortion or clipping in the output FF N 7 Adjust the signal generator output to 1 dBu 100 Hz The left headphone output should read 10 2 dB
74. onnector The in phase signal is available at pin 1 the inverted phase is available at pin 14 External DC Power Source The MCE325 may be powered from an external DC power supply in the 10 to 25 volt range 500 mA minimum If the external supply is in the 10 to 15 volt range connect the positive lead to pin 13 of the auxiliary connector and connect the minus lead to pin 10 or 11 A 0 5 Amp slo blo fuse should be connected in line for 17 to 24 volt operation Remote Speaker Mute Control When MCE325 is used with an external speaker the speaker may be muted from a remote location Applying a logic low signal to pin 25 of the auxiliary connector will cause muting Connect circuit common to pin 11 Front Panel Headset Connections Headset Requirements Use headphones with an impedance of 25 ohms or greater Low impedance 8 ohm headphones are not recommended Headphones with good acoustic 1solation 20 to 40 dB improve communication in high ambient noise environments and allow the user to use the headphones at a less tiring lower volume Headset Connections Dynamic microphone headset connector XLR 6 type receptacle Table 2 8 Dynamic microphone headset connector PIN FUNCTION Balanced mic low unbalanced mic common Balanced unbalanced mic high Headphone mic switch common Headphone right Mic Switch high aum Carbon microphone headset connector 4 inch tip ring sleeve phone jack Table 2 9 gt Carbon mic
75. per to short pins 2 and 3 Level and Frequency Response Check Four Wire Input to Headphone Four Wire A Input to Left Headphone 1 2 Set all front panel buttons to off Set all volume controls to minimum Remove the signal generator from the Program input and connect it to the Four Wire input AUXILIARY connector J22 pins 8 and 21 Set the generator to 0 dBu kHz 3 Move jumper J19 to short pins 3 amp 4 Four Wire input always on 4 Set the CH 1 3 volume control to measure 0 dBu at the left headphone output The control 7 should be at about the 2 o clock position Set the signal generator to 0 dBu 100 Hz The left headphone output should be 0 9 dBu 2 dBu Set the signal generator to 0 dBu 10 kHz The left headphone output should be 4 7 dBu 2 dBu Move jumper J19 to short pins 2 amp 3 Four Wire input off Four Wire B input to Right Headphone 1 Remove the signal from the Four Wire input and connect it to Four Wire input 722 pins 9 amp 22 2 Move jumper J20 to short pins 3 amp 4 Four Wire B input always on Set the CH 2 4 volume control to measure 0 dBu at the right headphone output The control should be at about the 2 o clock position Set the signal generator to O dBu 100 Hz The right headphone output should be 0 9 dBu 2 dBu Set the signal generator to 0 dBu 10 kHz The right headphone output should be 4 7 dBu 2 dBu Move jumper J20 to s
76. ption 5 16 18 2 6 Balanced Unbalanced Dynamic Microphone Selection J24 2 6 Headphone Sidetone Trimmer Adjustment 2 6 Speaker Adjustment R157 2 6 Mechanical Installation lt a ge edged OU Ee INDE L GER ee ee 2 6 Elecihical INStallaTon a 2 8 AG Power and ESO 4 gee Ble mle de amp SENS SIREN 2 8 Intercom Eines Js J9 andd TO ere a a ee 2 8 COMET Als 2 8 Connector PIn OUIS e a ANS Rer Sad 2 8 Four wire Output Termination EU RUE ee SPR SES 2 8 Program MINES AMA eee 2 9 External Speaker sa ah amanda hha EES 2 9 Auxillary Connector 22 Se Baw dd E QUE 2 9 Four Wire 2 9 Key outputs Expanded IFB Option 2 10 Remote Microphone Switch 2 10 ISO CONNECCION kek UU m NU NES eR ORO XO Da ded
77. rammed for stereo operation CH 1 VOL 1 adjusts the level to the left headphone and CH 2 VOL 2 adjusts the level to the right NOTE The MCE325 can be programmed via the front panel for monaural operation if desired The PGM VOL control adjusts the monaural mix of both program inputs to both headphones and to the external speaker It does not affect the program volume on the intercom lines Front Panel Sidetone Nulling Trimmer Adjustment When the MCE325 1s used with two wire lines the station operator s voice signal is not only transmitted onto the intercom lines but also echoed back into the MCE325 receive circuits This can result in acoustic feedback when the MCE325 is used with an external speaker The sidetone nulling trimmers are used to null or subtract the station operator s voice signal from the rest of the received signal to prevent this feedback NOTE This 1s not necessary in four wire systems since transmit and receive use separate circuits A trimmer is provided for each of the four channels The trimmers are factory preset for maximum nulling of the microphone signal when an ideal 200 ohm resistance terminates each intercom channel however the trimmers may require slight readjustment after the MCE325 has been installed to compensate for variations from the ideal To adjust the sidetone nulling trimmers 1 Turn the speaker switch on even if an external speaker is not connected This will turn off the internal true si
78. rd the front of the unit Front Panel Removal 1 Unplug the panel mic J1 and dynamic mic headset J2 connectors from the main circuit board 4 1 2 The ribbon connector from the front panel board to the main board 1 attached at both ends with locking connectors To unlock the connector pull the outer shell away from the circuit board Then pull the ribbon cable out Cleaning Clean the front panel and case with alcohol or a mild solution of detergent and water and then wipe off detergent residue with a damp rag Clean the circuit board 1f necessary with a tetraflouroethane product such as Flux Off CZ Chemtronics Use eye protection and avoid breathing the vapors with these solvents Also avoid getting the solvent in any of the potentiometers Test and Adjustment Procedures Notes e AC voltages are RMS unless otherwise specified All input and output levels were measured using an AC voltmeter calibrated for mW 0 775V at 600 ohms but with the 600 ohms in the circuit 0 dBu The following procedures involve changing the MCE325 programming It may be useful to note the current positions of all jumpers and DIP switches so that they can be returned to their proper positions after testing The inside of the top cover contains a location diagram for the programming jumpers and DIP switches Place it next to the MCE325 during testing for convenient reference Test procedures are written to be performed
79. rk for the various configurations MCE325 is typically supplied with a termination plug inserted into J10 This plug terminates 3 and 4 with 200 ohms to prevent oscillation when these channels are not used When the channels are used this termination plug should be removed Front Panel Setup Mode Lock out DS4 DIP switch DS4 may be set to lock out the front panel programming and prevent changes Front panel programming 1s described in Section 3 Operation ISO DS5 The 25 may be used with an RTS Model VCP6A VCP12A VCP12B Control Station to permit private conversation between the MCE325 operator and a camera operator When ISO mode is engaged either talk or talk and listen depending on the setting of DS5 for all other channels connected to the MCE325 will be muted and a private line will be established between the MCE325 operator and the camera operator See ISO Connection for wiring information Remote Talk off DS7 The MCE325 is capable of generating and transmitting an inaudible 24 kHz signal on an intercom channel This signal 15 used to turn off the microphones on any remote stations on the channel stations with remote talk off feature only This feature 1s useful when an unattended user station with an activated microphone is introducing unnecessary noise into a line DIP switch 057 enables disables this feature When remote talk off is enabled talk off signal is activated using the CAL
80. rophone headset connector SECTION FUNCTION Tip Carbon microphone Common ground 2 12 CSI 200 User Instructions General OPERATION The front panel buttons have different functions when the MCE325 15 switched from operating mode to setup mode Legends on the buttons indicate their operating mode functions legends under the buttons indicate their setup mode functions AIT of the front panel buttons were pre programmed for certain type of operation This 1 the default configuration Operation for the default configuration 15 described first and 16 then followed by front panel programming instructions to alter the operation Operating Instructions NOTE Momentary Latching Button action The channel selector buttons and ON button feature a special momentary latching dual action if a button 1s pressed and released quickly it will latch turning on if off or turning Off if on if the button is pressed and held slightly longer the action will be momentary and the button will turn off when released other buttons are latching only press to activate press to release The latching action can be disabled through the front panel programming LED Indicators LED indicators are provided for each button to indicate current status The LED can provide up to four indications continuously off continuously on short blink 50 on 50 off and long blink 90 on 10 off Channel Selection T
81. ser Manual defective or improper associated equipment attempts at modification and repair not authorized by Telex and shipping damage Products with their serial numbers removed or effaced are not covered by this warranty To obtain warranty service follow the procedures entitled Procedure For Returns and Shipping to Manufacturer for Repair or Adjustment This warranty is the sole and exclusive express warranty given with respect to RTS products It is the responsibility of the user to determine before purchase that this product is suitable for the user s intended purpose ANY AND ALL IMPLIED WARRANTIES INCLUDING THE IMPLIED WARRANTY OF MERCHANT ABILITY ARE LIMITED TO THE DURATION OF THIS EXPRESS LIMITED WARRANTY NEITHER TELEX NOR THE DEALER WHO SELLS RTS PRODUCTS IS LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND CUSTOMER SUPPORT Technical questions should be directed to Customer Service Department RTS Telex 12000 Portland Avenue South Burnsville MN 55337 U S A Telephone 952 848 4051 Fax 800 323 0498 RETURN SHIPPING INSTRUCTIONS PROCEDURE FOR RETURNS If a repair is necessary contact the dealer where this unit was purchased If repair through the dealer 1s not possible obtain a RETURN AUTHORIZATION from Customer Service Department Telex Communications Inc Telephone 877 863 4169 Fax 800 323 0498 DO NOT RETURN ANY EQUIPMENT DIRECTLY TO THE FACTORY WITHOUT FIRST OBTAINING A RETURN A
82. to a variety of external devices including external program sources two way radios paging systems and satellite circuits Some typical applications are shown in Figure 1 2 through Figure 1 10 Features Features of the MCE325 include Call Signaling Call signaling is accomplished using an inaudible 20 KHz signal to activate a call indicator LED e Remote talk off Active unattended remote station microphones may be deactivated by momentarily injecting an inaudible 24 signal into the corresponding intercom line The MCE325 can send and receive talk off signals e VOX circuit The MCE325 may be programmed for voice activation of the microphone e Simple IFB Program audio assigned to a channel is interrupted during talk External device keying External devices such as two way radios speaker mute relays or paging systems may be activated through key outputs at the auxiliary connector on the rear panel The key outputs may also be used to expand the simple IFB function allowing any one of a number of MCE325 stations to interrupt the program source and talk on the line Microphone limiter The microphone preamplifier circuit contains a limiter which helps to equalize voice levels Fully programmable Retains programming even when power 15 shut off 1 1 Front Panel Features Channel Selector and Operation Buttons These buttons have two modes of operation standard operating mode and program or set
83. to pin 17 Connect microphone high to pin 4 connect microphone low to pin 16 The external headset connections are wired in parallel with the front panel dynamic headset connector therefore use only one at a time In the headset connecting cable prevent coupling between the microphone and headphone leads by using a shielded twisted pair for the microphone and a separate shielded twisted pair for the headphones Do not allow headphone common to contact microphone low Tie the headphone shield to headphone common The headset cable can be made longer when the microphone and headphone pairs are physically separated The wider the separation the longer the allowable cable length Estimated maximum usable headphone cable lengths are as follows Single cable two shielded twisted pairs 10 feet 3 05 m Dual ribbed cable two shielded twisted pairs 30 feet 9 14 m 2 10 CSI 200 User Instructions Separate shielded twisted pair cables 50 feet 15 24 Balanced microphone input up to 100 feet 30 48 External Electret Microphone An external electret microphone may be connected at the auxiliary connector and used in place of a front panel gooseneck microphone Connect microphone high bias to pin 15 and connect microphone low to pin 2 When using an external microphone do not connect a front panel gooseneck microphone Unswitched Microphone Output The microphone audio 1 provided as an unswitched balanced output at the auxiliary c
84. ton lock permits all buttons except CALL to be individually programmed for one of three types of operation With the Button Lock submenu selected press each button one or more times to select the desired type of operation as follows Short LED blink 90 on 10 off No button lock default Long LED blink 50 on 50 off Button locked in the on position LED off Button locked the off position Latch Disable Latch disable may be used to prohibit latching action for individual channel selector buttons and the MIC ON button With the Latch Disable submenu selected press each channel selector button or the MIC ON button one or more times to select the desired type of operation as follows Short LED blink 90 on 10 off Latching enabled default 3 4 CSI 200 User Instructions Long LED blink 50 on 50 off Latching disabled Instant Mic Talk buttons may be individually programmed to automatically activate the microphone when pressed With the Instant Mic submenu selected press each talk button one or more times to select the desired type of operation as follows Short LED blink 9090 on 1090 off Instant mic off default Long LED blink 50 on 50 off Instant mic on Reset To restore the original programming hold down the CH I talk button for about two seconds while powering up the MCE325 Table 3 1 Front panel control usage for the various intercom line configurations VOLUME CONTROL USA
85. u 9 Reset the generator to 0 dBu 1 kHz 10Remove jumper J16 program not assigned to left headphone Verify that the signal level drops at least 35 dB from the reference level in step 9 4 7 11 Restore jumper J16 to short pins 1 amp 2 Program B to Right Headphone 1 Remove the signal from the PROGRAM A input and connect it to the PROGRAM input 2 Measure the level at the right headphone output J2 3 5 It should be 1 3 dBu 2 dBu Program volume at maximum 3 Set the signal generator to O dBu 100 Hz The right headphone output should be 0 8 dBu 2 dBu 4 Set the signal generator to 0 dBu 10 kHz The right headphone output should be 3 8 dBu 2 dBu 5 Reset the generator to 0 dBu 1 kHz 6 Remove jumper J17 program not assigned to right headphone Verify that the signal level drops at least 35 dB from the reference level in step 2 7 Restore jumper J17 to short pins 1 amp 2 Program to Speaker 1 Connect the AC voltmeter across the 8 ohm load at the speaker output 2 Set the SPKR ON button to the on position Measure the level at speaker output It should be 6 dBu 2 dBu Program volume at maximum Set the signal generator to 0 dBu 100 Hz The speaker output should be 1 3 dBu 2 dBu Set the signal generator to 0 dBu 10 kHz The speaker output should be 7 3 dBu 2 dBu Reset the generator to 0 dBu 1 kHz Remove jumper 118 program not assigned to speaker Verify that th
86. u 2 dBu 1 9 to 3 2 8 Adjust the signal generator output to 1 dBu 10 kHz The left headphone output should read 7 8 dBu 2 dBu 1 5 to 2 4 9 Repeat the test for channels 2 through 4 For channel 3 continue to use the 1 3 volume control and monitor the left headphone output For channels 2 and 4 use the CH2 4 volume control and monitor the right headphone output Table 4 4 Channel 1 4 sidetone trimmer adjust TALK BUTTON TEST POINT POTENTIOMETER om U5 pin 1 R73 Sidetone 2 U7 pin 1 R88 Sidetone 3 U7 pin 7 R104 Sidetone 4 4 6 CSI 200 User Instructions Level and Frequency Response Check Intercom Channel to Speaker Set all front panel buttons to off Set all volume controls to minimum Connect an 8 ohm load across the speaker output J27 tip and ring Connect an AC voltmeter and an oscilloscope across the speaker output NYO Connect the signal generator to intercom channel 1 and adjust the generator output to 1 dBu kHz Set the SPKR ON and CH 1 TALK buttons to on 6 Rotate the 1 3 volume control and check that the speaker output level reaches 18 dBu 17 4 Vp p before clipping O1 7 Set the 1 3 volume control to get 15 dBu 4 4 at the speaker output The volume control should be approximately at the 2 o clock position 8 Activate speaker muting by grounding J22 pin 25 to pin 10 The speaker output level should drop to 5 mV or less and
87. up mode The printing on the face of each button indicates its function in standard operating mode printing under each button indicates its setup mode function See Section 3 for operation and programming instructions An LED located above each button provides status information The MCE325 is factory pre programmed for two channel operation with each channel having one talk and one listen button However the MCE325 may also be programmed so that each channel selector button controls both talk and listen for a single channel permitting operation of up to four intercom channels Additionally users may wish to customize the identification of channels With this in mind button kit has been supplied with the 25 to allow you to customize the button labeling to suit your particular application Figure 1 11 shows the available button caps as well as some typical button configurations NOTE standard buttons are opaque As a result the front panel LED s may not be visible when viewing the MCE325 from low angle such as when it is mounted high in an equipment rack As a remedy for this problem clear buttons are available that allow the LED light to pass through Order RTS part no 9000 2698 800 Volume Controls CH1 VOL 1 This control adjusts the volume of channels 1 and or 3 to the left headphone when stereo headphones are used It adjusts the mono mix level of these channels when monaural headphones or an external speak

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