Telex MCE325 Manual de usuario

9350-6464-00 Rev J, 7/2001USER INSTRUCTIONSMODEL MCE325PROGRAMMABLE USER STATION

1-2 MCE325 User InstructionsFront Panel FeaturesChannel Selector and Operation ButtonsThese buttons have two modes of operation: standard operating mo

1-3Figure 1.1MCE325 front and rear panel features.Rear Panel FeaturesIntercom LinesConnectors J8 and J9 are parallel-wired for loop-through connection

1-4 MCE325 User Instructionsbe assigned to a four-wire channel. The program assigned to channels is interrupted during talk output.Speaker OutputA ¼-i

1-5MCE325 SpecificationsGeneralBridging Impedance (to line) 10,000 ohms typicalNoise Contribution to 200-ohm Line -90 dBuCall Signal Frequency 20 kHz,

1-6 MCE325 User InstructionsConnectorsIntercom Line Connector XLR type, 3-pin (male-female loop through on two-wirechannel 1 and 2, or four-wire chann

1-7Figure 1.3Standard four-channel, two-wire configuration.Figure 1.4A four-channel, two-wire configuration with two channels used for IFB’s.Figure 1.

1-8 MCE325 User InstructionsFigure 1.6Standard two-channel, four wire configuration.Figure 1.7Multiple interconnected stations in four-channel, two-wi

1-9Figure 1.8Multiple interconnected stations using one four-wire intercom channel and two two-wire channels for IFB’s.Figure 1.9A four-channel, two-w

1-10 MCE325 User InstructionsFigure 1.10Configuration for an ENG truck using one four-wire intercom channel and two two-wire IFB’s.

1-11Figure 1.11MCE325 button configurations.

PROPRIETARY NOTICEThe RTS product information and design disclosed herein were originated by and are the property of Telex Com-munications, Inc. telex

1-12 MCE325 User Instructions

2-1S ECTIONCHAPTER 2INSTALLATIONInternal Programming and AdjustmentsWARNINGHazardous voltages exist inside this equipment. Disconnect the AC line cord

2-2 CSI-200 User InstructionsFigure 2.1Top cover removal.Intercom Line-Channel Configurations (DS1-DS3, J6, J7, J19 & J20)The four channels of the

2-32 When a two-wire line is connected to channel one and a four-wire line is connected to channel B.For all other intercom line configurations that u

2-4 CSI-200 User InstructionsFigure 2.2Internal DIP switches, jumpers and level trimmers.

2-5NOTESee Table 3.1for a summary of how the channel selector buttons work for the various configurations. The MCE325 is typically supplied with a ter

2-6 CSI-200 User InstructionsProgram Assignment – IFB Option (J4, J5, J16-J18)Jumper J4 assigns PROGRAM A to two-wire CH 3 or four-wire CH B with inte

2-7Figure 2.3Mounting configurations.

2-8 CSI-200 User InstructionsElectrical InstallationAC Power and FuseThe Model MCE325 is pre-wired for either 115 or 230 VAC operation, and the approp

2-9resistor values. These resistors would normally be installed in the cable connector, but may be placed at any point in the signal path. Recommended

RETURN SHIPPING INSTRUCTIONS PROCEDURE FOR RETURNSIf a repair is necessary, contact the dealer where this unit was purchased.If repair through the dea

2-10 CSI-200 User InstructionsKey outputs – Expanded IFB OptionFour logic-type outputs are available at pins 6, 7, 19, and 20 of the auxiliary connect

2-11Separate shielded twisted pair cables: 50 feet (15.24 m). Balanced microphone input: up to 100 feet (30.48 m).External Electret MicrophoneAn exter

2-12 CSI-200 User InstructionsCarbon-microphone headset connector: ¼-inch, tip-ring-sleeve phone jack.Table 2.9Carbon-microphone headset connector.SEC

3-1S ECTIONCHAPTER 3OPERATIONGeneralThe front panel buttons have different functions when the MCE325 is switched from operating mode to setup mode. Le

3-2 CSI-200 User Instructionsbutton action can be changed, via the front panel programming, so that the button controls talk only, with listen either

3-3turned on to prevent feedback. See “Headphone Sidetone Trimmer Adjustment (R37)” for further details.Sending and Receiving Call SignalsTo call a ch

3-4 CSI-200 User InstructionsChannel IDThe MCE325 can be programmed so that when someone is talking on an intercom channel, the corresponding listen b

3-5Long LED blink (50% on, 50% off): Latching disabled.Instant MicTalk buttons may be individually programmed to automatically activate the microphone

3-6 CSI-200 User Instructions

4-1S ECTIONCHAPTER 4MAINTENANCEPreventive MaintenanceClean the unit and verify its performance periodically.Factory Support InformationFactory support

End-User License Agreement for Telex® SoftwareIMPORTANT - Please read this document carefully before using this product.THIS DOCUMENT STATES THE TERMS

4-2 CSI-200 User Instructions2 The ribbon connector from the front panel board to the main board is attached at both ends with locking connectors. To

4-34 Measure the ripple.Vripple = 140 mVp-p5 Measure the regulated DC voltage at U26 pin 2. (There should be no ripple.)VU26-2 = 13.85 ±0.3 VDC6 Measu

4-4 CSI-200 User Instructions2 Set the MIC ON button to on. Set all other front panel buttons to off.3 Check for 13 VDC minimum at the key 1 output.4

4-5Two-Channel, Four-Wire Mode1 Remove the 200 ohm terminations from intercom channels 1 through 4.2 Program the MCE325 to be in two-channel, four-wir

4-6 CSI-200 User Instructions8 Repeat for channels 2 through 4 by activating the TALK buttons, connecting to the test points and adjusting the potenti

4-7Level and Frequency Response Check, Intercom Channel to Speaker1 Set all front panel buttons to off. Set all volume controls to minimum.2 Connect a

4-8 CSI-200 User Instructions11Restore jumper J16 to short pins 1 & 2.Program B to Right Headphone1 Remove the signal from the PROGRAM A input, an

4-9IFB A1 Move the J4 jumper to short pins 1 and 2 (IFB A assigned to channel 3).2 Remove the signal from PROGRAM B input, and connect it to the PROGR

4-10 CSI-200 User InstructionsPanel Mic to Channel Test1 Turn all front panel buttons off. Set all volume controls to minimum.2 Remove the signal from

4-1111Try turning the MIC ON button on. It should not stay on.12Adjust signal generator to –5 dBu at 25.680 kHz.13Try turning the MIC ON button on and

iTABLE OF CONTENTSDescription & Specifications 1-1Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-12 CSI-200 User InstructionsISO Test1 Set DIP switch DS3 to off (two-channel, two-wire mode).2 Set DIP switch DS5 to on (talk muted during ISO).3 Se

4-1312Turn on the SPKR ON button. The meter should read –38 dBu or less. Turn off the SPKR ON button.NOTENoise measurements in the following steps wer

4-14 CSI-200 User Instructions

5-1S ECTIONCHAPTER 5PARTS LISTSPackaging Assembly (9000-6464-00)Final Assembly, MCE325 (9010-6464-00)Table 5.1Reference PD6464 Drawing, Section 6Item

5-2 CSI-200 User InstructionsFront Panel Assembly (9020-6261-00)Table 5.3Reference AS6261 Drawing, Section 6Item No. Description RTS Part No.1 Bezel,

5-3Back Panel Assembly (9020-6262-00)Heatsink Assembly (9020-6324-00)Main PC Board Assembly (9030-6245-01)Table 5.4Reference AS6262 Drawing, Section 6

5-4 CSI-200 User InstructionsC104 Capacitor, CM, 0.1µF, 50V 52676113C105 Capacitor, EL, 100µF, 25V 51821524C106 Capacitor, EL, 4.7µf, 25V 51821621C107

5-5C2 Capacitor, EL, 10µF, 50V 51821110C20 Capacitor, CD, 100pF, 100V 1501R1011LC21 Capacitor, CD, 100pF, 100V 1501R1011LC22 Capacitor, CM, 0.1µF, 50V

5-6 CSI-200 User InstructionsC61 Capacitor, Mylar, 1nF, 100V 1514R1022LC62 Capacitor, EL, 10µF, 50V 51821110C63 Capacitor, CD, 100pF, 100V 1501R1011LC

5-7D11 Diode, 1N4004 50745005TD12 Diode, 1N4004 50745005TD13 Diode, 1N4004 50745005TD14 Diode, 1N914B 160109140BD15 Diode, 1N914B 160109140BD16 Diode,

iiUnswitched Microphone Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-8 CSI-200 User InstructionsQ4 Transistor, 2N5210 1602521000Q5 Transistor, 2N5210 1602521000R1 Resistor, CF, 1K Ohm, 5%, 1/8W 52154060R10 Resistor,

5-9R170 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036R171 Resistor, CF, 10K Ohm, 5%, 1/8W 52154036R172 Resistor, MF, 201 Ohm, 1%, 1/8W 54032301R173 Resisto

5-10 CSI-200 User InstructionsR267 Resistor, MF, 201 Ohm, 1%, 1/8W 54032301R268 Resistor, CF, 200 Ohm, 5%, 1/8W 52154077R269 Resistor, CF, 10K Ohm, 5%

5-11R67 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028R68 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028R69 Resistor, CF, 22K Ohm, 5%, 1/8W 524154028R7 Resistor

5-12 CSI-200 User InstructionsU1 IC, Dual Low-noise Op-Amp, NE5532N 53295000U10 IC, Dual Low-noise Op-Amp, NE5532N 53295000U11 IC, Dual Low-noise Op-A

5-13PC Board Assembly, Front Panel (9030-6246-00)Table 5.7Reference AS6246 Drawing, Section 6Ref No. Description RTS Part No.R1-R3 Pot, 10K Ohm, Audio

5-14 CSI-200 User Instructions

6-1S ECTIONCHAPTER 6DIAGRAMS

6-2 CSI-200 User Instructions

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iiiIFB A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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5544332211DCBABILATTALK(SHT3,7D)(SHT2,1D)BAL(SHT3,5D)CH.32D)CH.3(SHT2,1D)LISTEN BUFFER(SHT3,CH.4MICCH.1CH 4(SHT2,1D)LISTEN2D)BUFFERLISTEN BUFFER (TO C

5544332211D DC CB BA A(SHT3,2D)ONPGM ASSIGN(6A)(SHT3,2D)22280dBu NOM(SHT3,2D)(SHT1,4B)29(-6dBu NOM)(SHT3,7D)(1D)4 WIRE B IN(1D)(SHT1,6D)(+6dBu pK)MAX=

5544332211D DC CB BA AREAR PANEL MOUNTED15GND TPFRONT15VAC(SHT1,4A)SPKR ON20CH 1(SHT1,4B),(SHT2,6C)SOURCE(2B)(SHT1,4C)3SWITCHES(5D)19CH 2ANALOG MID,(S

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1-1S ECTIONCHAPTER 1DESCRIPTION & SPECIFICATIONSDescriptionGeneralThe MCE325 is a four-channel, programmable intercom station. It may be used as a