Manuals / Telex / Home Audio / Stereo Amplifier

Telex MCE325 Front Panel Programming, Sending and Receiving Call Signals, Activating Setup Mode

Models: MCE325

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Sending and Receiving Call Signals

turned on to prevent feedback. See “Headphone Sidetone Trimmer Adjustment (R37)” for further details.

Sending and Receiving Call Signals

To call a channel:

1Press the CALL button; the CALL LED’s will flash to indicate “call signal ready”.

2Press and hold the talk button for the channel to be called; the call signal will be transmitted as long as the talk button is held.

3When a response is received, release the talk button to turn off the call signal.

Receiving a call:

When there is 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:

1Press and release the CALL button three times in rapid succession; the CALL LED’s will turn on to indicate “talk-off signal ready”.

2Momentarily press the talk button for the channel to be deactivated. This will cause the talk-off signal to be transmitted.

3Release the talk button to end the talk-off signal transmission.

Front Panel Programming

Activating Setup Mode

Press and hold the CALL button for 5 seconds: the TALK 1, LISTEN 1, TALK 2, LISTEN 2, PANEL MIC, SPKR ON, and MIC ON LED’s will begin to flash. This is 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.

NOTE If no submenu is selected from the main menu within 12 seconds after program mode activation, the programming mode will time out, and the MCE325 will return to normal operation. If a submenu is 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, is also indicated for each submenu.

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Telex MCE325 Front Panel Programming, Sending and Receiving Call Signals, Using the Talk-OffFeature, Activating Setup Mode

Contents

PROGRAMMABLE USER STATION MODEL MCE325USER INSTRUCTIONS UNPACKING AND INSPECTION WARRANTY INFORMATIONPROPRIETARY NOTICE COPYRIGHT NOTICERETURN SHIPPING INSTRUCTIONS End-UserLicense Agreement for Telex Software Installation TABLE OF CONTENTSDescription & Specifications Operation MaintenanceDiagrams Parts ListsPage General DESCRIPTION & SPECIFICATIONSFeatures DescriptionChannel Selector and Operation Buttons Front Panel FeaturesVolume Controls Connections, Inputs and OutputsExternal Program Input Rear Panel FeaturesIntercom Lines Programming PowerMounting Configuration Auxiliary ConnectorHeadphone Amplifier MCE325 SpecificationsPower and Mechanical Microphone PreamplifierConnectors MCS325 SpecificationsFigure 1.3 Standard four-channel, two-wireconfiguration 1-8 M C E 3 2 5 U s e r I n s t r u c t i o n s Figure 1.8 Multiple interconnected stations using one four-wireintercom channel and two two-wirechannels for IFB’s 1-10 M C E 3 2 5 U s e r I n s t r u c t i o n s Figure 1.11 MCE325 button configurations 1-12 M C E 3 2 5 U s e r I n s t r u c t i o n s S E C T I O N INSTALLATIONInternal Programming and Adjustments GeneralFigure 2.1 Top cover removal Switch NumberSwitch Function Default SettingJumper Function Table 2.2 Jumper functions and default settingsDefault Setting Jumper Number2-4 C S I - 2 0 0 U s e r I n s t r u c t i o n s VOX DS8 Front Panel Setup Mode Lock-outDS4ISO DS5 Remote Talk-offDS7Program Assignment - IFB Option J4, J5, J16-J18 Mechanical InstallationHeadphone Sidetone Trimmer Adjustment R37 Speaker Dim Adjustment R157Figure 2.3 Mounting configurations Four-wireOutput Termination Electrical InstallationAC Power and Fuse Connector Pin-outsExternal Speaker, J27 Auxiliary Connector, J22Four-WireChannel A and B Input Program Inputs, J14 and J15External Headset Remote Microphone SwitchKey outputs - Expanded IFB Option ISO ConnectionExternal Electret Microphone Front Panel Headset ConnectionsUnswitched Microphone Output External DC Power SourceCarbon microphone Table 2.9 Carbon-microphoneheadset connectorSECTION FUNCTIONOperating Instructions LED IndicatorsOPERATION GeneralMicrophone On/Off Volume AdjustmentFront Panel Sidetone Nulling Trimmer Adjustment Panel Mic/Headset Mic SelectionMenu Selection/Ending Setup Sending and Receiving Call SignalsUsing the Talk-OffFeature Activating Setup ModeFour-channelListen Call DisableLatch Disable Channel IDInstant Mic Reset3-6 C S I - 2 0 0 U s e r I n s t r u c t i o n s Access MAINTENANCEPreventive Maintenance Corrective MaintenanceTest Equipment Test and Adjustment ProceduresCleaning Power Supply TestKeying Output Test Initial ConfigurationFrequency Response and Level Check, Mic to Line Four-Channel, Two-WireModeTwo-Channel, Four-WireMode Sidetone Null Test and AdjustmentTrue Sidetone Adjust Program A to Left Headphone IFB B IFB TestProgram B to Right Headphone Program to SpeakerIFB A Four-WireA Input to Left HeadphoneFour-WireB input to Right Headphone Mic Kill Receive Test Panel Mic to Channel TestCarbon Mic to Channel Test VOX TestCall Receive Test Mic Kill Transmit TestCall Transmit Test Noise Checks Remote Mic Switch TestISO Test Program Lockout Test15Turn all buttons off Page S E C T I O N PARTS LISTSPackaging Assembly Final Assembly, MCE325Description Front Panel AssemblyTable 5.3 Reference AS6261 Drawing, Section Item NoItem No Back Panel AssemblyHeatsink Assembly Main PC Board AssemblyC104 Capacitor, EL, 10µF Capacitor, Mylar, 1nF Diode, 1N4004 Transistor, 2N5210 R170 R267 Resistor, CF, 22K Ohm, 5%, 1/8W IC, Dual Low-noise Op-Amp,NE5532N Description PC Board Assembly, Front PanelTable 5.7 Reference AS6246 Drawing, Section Ref NoPage S E C T I O N DIAGRAMS6-2 C S I - 2 0 0 U s e r I n s t r u c t i o n s Time 05 20 45 PM Date 7/23/01Title D \TEMP\AS6246 01B.cal Date 7/23/01 Title D \TEMP\AS6245 01D.calTime 05 27 24 PM Date 7/23/01 Title D \TEMP\AS6261 01C.calTime 05 21 25 PM Date 7/23/01 Title D \TEMP\AS6262 01C.calTime 05 22 16 PM Title C \home\cms\benedil\view\9020-6324 01.DWG Date 7/19/01Time 02 05 07 PM Date 7/23/01 Title D \TEMP\AS6464 01G.dwgTime 05 23 05 PM Date 7/23/01 Title D \TEMP\BD6464 01A.calTime 05 23 33 PM Date 7/23/01 Title D \TEMP\IS6718 01A.calTime 05 24 13 PM Date 7/23/01 Title D \TEMP\OD6355 01A.calTime 05 24 51 PM Date 7/23/01 Title D \TEMP\OD6355 02A.calTime 05 25 30 PM Date 7/23/01 Title D \TEMP\OD6355 03A.calTime 05 26 07 PM Date 7/23/01 Title D \TEMP\OD6355 04A.calTime 05 26 42 PM Date 7/23/01 Title c \home\cms\benedil\view\9000-6464 01.CALTime 05 03 09 PM 9027624501 SCHEMATIC DIAGRAMMOTHERBOARD MCE325Title MOTHER BOARD9027624501 MCE325DWG. NO MOTHER BOARD MCE3259027624501 TitleDate 7/23/01 Title D \TEMP\SD6246 01A.calTime 05 19 08 PM