Telex Q II - FOH specifications Q2 Operationand Maintenance Manual

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If the solo switch is held down then C43 will charge through D13 and R155 causing pin 1 of IC12 to go high. Pin 2 is already high as the flip flop has operated to give a solo and thus pin 3 of IC12 will go low. This low is applied to pin 2 of IC13 and when the solo button is released pin 1 will also go low. Pin 3 of IC13 then goes high causing the flip flop to be reset thus cancelling the solo. TR6 is also switched on to discharge C43. The output of IC12 will then revert to a high state causing the reset to go low and allow normal operation of the flip flop. A RESET signal from the master module will be received by pin 2 of IC13 and will cause pin 3 to go high (since pin 1 will already be low) again giving a reset and cancelling any solo.

Another version of the above circuit exists based around 4001 OR gates although the principle behind it is exactly the same. The example shown is an output solo and in order for the input priority system to work then an extra gate is used - IC47D. When a solo is requested audio is allowed onto all four solo buses with selection being made on the master module depending upon the selected solo mode.

The RESET line from the master module is in fact tri-state and in the high condition it is used to pull pin 11 of IC47D low cancelling the solo. This only occurs when input priority mode is selected and when an input solo is called for. The RESET does not reset the output solo latch so that when cancelled the previous output solo can again take effect. When the RESET line goes high it will go to almost the audio positive rail. This excess voltage is removed by zener diode D50 which is used to block the output of IC47B which will be at 5V. When the RESET line goes low then IC48A will be reset cancelling any solo.

Q2 OPERATIONAND MAINTENANCE MANUAL 9601

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Contents II FOH Contents Declaration of Conformity Left Centre Right General InformationQ2 in USE Left Centre Right Effects Matrix Outputs Warranty Q2 Operationand Maintenance Manual Dimensions Maximum Gain SpecificationsFrequency Response DistortionQ2 Operationand Maintenance Manual Wiring Considerations Grounding Q2 Operationand Maintenance Manual Do not Disconnect the Mains Earth Cables Module Descriptions CUE Interlock Mode Master CUE Reset Matrix Section 20DB PAD Input Module Equaliser HI MIDLO MID PRE AuxiliariesDIR Routing and Status PAN MonoLCR Meter Fader CUESafe Mute GroupMIC Input Connectors and PIN AssignmentsLine Input Insert SendVCA Input Module VCA/MUTE Group 1 Assign EXTExternal VCA Fader Control Wiring Stereo Effect Return Module Phase ReverseCUT WidthLF EQ HF EQMONO/STEREO BALVCA/MUTE Group Connectors and PIN Assignments Mono Subgroup Output Module Matrix Meter Group MeterCUE/SOLO Matrix Send PRE SUB/LCRConnectors and PIN Assignments Stereo Subgroup Output Module CUE/SOLO BAL Connectors and PIN Assignments LCR Subgroup Output Module Group Meters L, C, R VCA/MUTE Group 1 Assign Connectors and PIN Assignments 1 Level Foldback Master ModuleHeadphones Level HEADPHONES/HEADSET OutputsAuxiliary Master Module AUX 1 LevelStereo Master Module OSC Internal SINEWAVE/NOISE GeneratorGENERATOR/TALKBACK Assign Matrix GroupsTape Monitor SectionMonitor Level DIMCUE/SOLO Master Section PFL/AFL CUE ResetTrim CUE IntlkTone Talkback SystemLevel Comms onTo Mono Master Output Control PREMono CUE/SOLO FadersMaster Connector Panel VCA Master Module Q2 Operationand Maintenance Manual BAL VCA VCA Master Section CUTConnectors and PIN Assignments Audio Master Module Q2 Technical Description Q2 Operationand Maintenance Manual Q2 Operationand Maintenance Manual Q2 Operationand Maintenance Manual Auxiliary Master Module Foldback Master Module Signal Path Reset CircuitSolo System Q2 Operationand Maintenance Manual Q2 Panning ON/CUT Circuit Midi Interface Input Module Resistors Q2 RoutingLevel Meter Input Module Routing LinksInput Module Links Mono Group Output Module Mono Group Output Links Stereo Group Output Links Stereo Group Output ModuleLCR Group Output Links LCR Group Output ModuleInput Module Q2 VCAInput SUB Board Links Adjustments Output ModuleOutput SUB Board Links VCA Master Modules Q2 Operationand Maintenance Manual Q2 Operationand Maintenance Manual