Yamaha CR-640 Service Manual

Labels and identification for all components on the front panel.

Rear panel layout and connections for USA and Canadian models.

Rear panel layout and connections for the general model.

Rear panel layout and connections for British and Australian models.

Rear panel layout and connections for North European models.

Identification of internal components visible from the top view.

Diagram and description of the dial mechanism and its components.

Steps for removing the top and bottom covers.

Procedure for safely removing the front panel assembly.

Instructions for removing various tuner circuit boards.

Instructions for removing main and lamp circuit boards.

Setting switches and using filters for FM tuner overall adjustment.

Procedures for pointer alignment, tracking, and discriminator balance.

Adjustments for VCO, stereo distortion, and signal meter.

Procedure for adjusting stereo separation.

Steps for adjusting AM tuner tracking and sensitivity.

Procedure for adjusting the DC offset voltage in the audio section.

Technical specifications for the audio output, input, and tone control.

Technical specifications for FM and AM tuner performance.

Overall specifications including power, dimensions, and weight.

Visual representation of signal flow and major circuit blocks.

Detailed circuit diagrams and pin configurations for integrated circuits.

Diagram illustrating internal wiring between circuit boards and components.

Detailed electronic schematics of the receiver's circuitry.

Details on component connections, transistor/diode types, and wire color codes.

An exploded view showing the assembly of the main chassis and external parts.

List of part numbers for cabinet, rear panel, and front panel components.

List of part numbers for screws, washers, clips, and other small hardware.

List of part numbers for switches, lamps, and meters.

List of part numbers for various knobs used on the unit.

List of part numbers for panel units and the power transformer.

List of part numbers for main and tuner circuit boards, and related holders.

List of capacitors used on the tuner circuit board.

List of additional capacitors used on the tuner circuit board.

List of carbon resistors and their specifications.

List of resistors, including carbon and cement molded types.

List of remaining resistors and semiconductor components.

List of part numbers for switches, jacks, wire, and related hardware.

List of capacitors used on the main circuit board.

List of coils and resistors used on the main circuit board.

List of resistors and semiconductor components for the main circuit board.

List of fuses, jacks, wire, screws, and other assembly hardware.

Information regarding the revision status and model details of the manual.