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Yamaha CT-7000 Service Manual

Yamaha CT-7000
42 pages
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Yamaha CT-7000 Specifications

General IconGeneral
Tuning BandsFM, MW
Tuning ScaleAnalog
FM Tuning Range88 to 108 MHz
Signal to Noise Ratio (AM/MW)50 dB
Selectivity (FM)80 dB
MW Tuning Range530 to 1600 kHz
AM Tuning Range530 - 1605 kHz
Frequency Response (FM)30Hz to 15kHz
Sensitivity (AM/MW)30 µV

Summary

EXTERNAL VIEWS

FRONT PANEL

Details components and controls on the front of the tuner unit.

REAR PANEL (U.S.& CANADIAN MODELS)

Identifies connections and ports on the rear for North American models.

REAR PANEL (EUROPEAN MODEL)

Identifies connections and ports on the rear for European models.

INTERNAL VIEWS

TOP VIEW

Illustrates and labels components visible from the top inside the unit.

BOTTOM VIEW

Illustrates and labels components visible from the bottom inside the unit.

CIRCUIT DESCRIPTION

METER CIRCUIT

Explains the function and operation of the signal and multipath meter circuit.

AUTO BLEND CIRCUIT

Describes the circuit that automatically adjusts stereo blend based on signal strength.

AUTO TOUCH AFC OFF CIRCUIT

Explains the circuit that temporarily disables AFC during tuning and indicates station lock.

TRANSIENT NOISE CANCELLATION CIRCUIT

Details the circuit designed to cancel noise from power switch operation.

MUTING CIRCUIT

Explains the circuit that eliminates weak signals and inter-station noise during tuning.

PHASE LOCKED LOOP CIRCUIT

Describes the PLL circuit for creating a switching signal and stereo component separation.

STEREO/MONO DRIVE CIRCUIT

Details the circuit that drives the stereo/mono modes and stereo indicator lamp.

MULTIPLEX DEMODULATOR CIRCUIT

Explains the switching method to separate left and right audio signals from the composite signal.

PARTIAL DISASSEMBLY

DIAL MECHANISM

MEASUREMENT AND ADJUSTMENT

TUNER SECTION

Details various tests and adjustments for the tuner section of the device.

ADJUSTMENT POINT

RF Pack Adjustments

Specifies adjustments and required instruments for the RF Pack.

IF Circuit Board Adjustments

Outlines overall adjustment procedures for the IF Circuit Board.

Discriminator Circuit Board Adjustments

Details overall adjustment procedures for the Discriminator circuit board.

MPX Circuit Board Adjustments

Lists adjustments for VCO, Separation, and Output Level on the MPX Board.

Control Circuit Board Adjustments

Specifies adjustments for Separation and Signal Meter on the Control Board.

Power Circuit Board Adjustments

Identifies VCO adjustment for the Power Circuit Board.

SPECIFICATION ASSURANCE CONDITIONS

PRINTED CIRCUIT BOARD

WIRING CONNECTION DIAGRAM

Shows the electrical connections between various circuit boards and components.

IF CIRCUIT BOARD

Provides the schematic layout and component identification for the IF circuit board.

DISCRIMINATOR CIRCUIT BOARD

Presents the schematic layout and component identification for the Discriminator circuit board.

MPX CIRCUIT BOARD

Displays the schematic layout and component identification for the MPX circuit board.

VOLUME CIRCUIT BOARD

Shows the schematic layout and component identification for the Volume circuit board.

METER LAMP CIRCUIT BOARD

Displays the schematic layout and component identification for the Meter Lamp circuit board.

LAMP CIRCUIT BOARD

Presents the schematic layout and component identification for the Lamp circuit board.

BLOCK DIAGRAM

OVERALL SCHEMATIC DIAGRAM

PARTIAL CHANGES MADE ACCORDING TO DESTINATION

Power Differences

Details power supply variations for U.S./Canadian and European models.

Antenna Connection

Illustrates antenna connection differences for the European model.

PARTS LIST

Front View Parts

Lists and illustrates components visible on the front panel of the unit.

Internal View Parts

Lists and illustrates components visible inside the unit from the top.

Internal View Components

Lists and illustrates additional internal components of the unit.

Exploded View Parts

Shows an exploded view with numbered components for assembly reference.

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