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Need help?Do you have a question about the Marantz 74 CD7 and is the answer not in the manual?
Instructions and required information for ordering Marantz parts.
Safety precautions and test procedures for servicing to prevent electric shock and fire hazards.
Specifications related to the audio performance of the CD player.
Details about the laser and its wavelength used in the optical pickup.
Specifications for frequency range, dynamic range, and channel separation.
Specifies the output levels and impedance for analog audio outputs.
Specifies the output levels for digital audio outputs.
Details the input voltage, frequency, and power consumption.
Dimensions, net weight, operating temperature, and humidity.
Lists the accessories provided with the unit.
General advice for component handling and soldering during service.
Techniques for safely dismounting and mounting components.
Important precautions to follow during servicing to avoid damage.
List of specialized discs used for testing audio functions.
List of specific tools like screwdrivers and wrenches for servicing.
Instructions on how to enter the service mode by button combination.
Details on navigating through different service modes (P00 to P03).
Describes button functions available during service mode operation.
A table listing error codes and their corresponding faults.
Instructions on how to exit the service mode by powering off the unit.
Pin details and descriptions for the SAA7372GP integrated circuit.
Pin details and descriptions for the TDA1302T integrated circuit.
Pin details and descriptions for the TDA7073AT integrated circuit.
Pin details and descriptions for the TDA1315H integrated circuit.
Pin details and descriptions for the DSP56004 integrated circuit.
Pin details and descriptions for the µPD78076 microcontroller.
Pin details and descriptions for the TDA1541A/S2 DAC integrated circuit.
Wiring connections between the mains transformer and the power switch PCB.
Wiring connections between the CD mechanism and the servo/control PCB.
Wiring connections between the front key PCB and the power/DSP PCB.
Wiring connections between the DAC/LPF/Balance AMP PCB and the front display PCB.
Block representation of the sub chassis and CD mechanism.
Block representation of signal decoding, servo control, and digital filtering.
Block representation of Digital-to-Analog Conversion and Low-Pass Filtering.
Block representing the digital input/output receiver.
A list defining flag names and their respective functions in the system.
Schematic diagrams for the VAM1252 mechanism and LM500 loader.
Schematic diagrams for the servo/decoder and TDA1302T DAC.
Schematic diagrams for the UP78076 microcontroller and TDA1315H.
Schematic diagrams for front panel key and display interfaces.
Details on the anode connections for the display segments.
Schematic diagrams for power supply and digital interface sections.
Wiring diagrams showing connections to servo decoder and front PCBs.
Schematic diagrams for DAC, I-V conversion, and Low-Pass Filter stages.
Schematic details of the low-pass filter section.
Schematic details of the balance amplifier section.
Schematic diagrams for DAC, I-V conversion, and Low-Pass Filter stages.
Schematic of the differential coaxial amplifier.
Schematic diagrams for muting and balance control functions.
Diagram showing the placement of components on the main PCB (PP16).
Diagram showing component placement for digital input/output sections on PP16.
Diagram showing component placement for audio and digital supply sections on PP16.
Diagram showing the placement of components on the PA16 board.
Diagram showing component placement for left and right audio channels on PA16.
Diagram showing the layout of the main Printed Wiring Board (PV16).
Diagram showing the layout of the PY16 board.
Diagram showing the layout of the PH16 board.
Diagram showing the layout of the PY26 board.
Exploded view and parts list specific to K version.
Exploded views and parts for the loader and front panel assemblies.
Key to understand the symbols and styles used in the parts list.
List of part numbers and descriptions for front panel components.
List of part numbers and descriptions for mechanical components.
List of non-standard spare parts.
Detailed list of part numbers and descriptions for the loader assembly.
List of various mechanical parts with their part numbers.
Diagram illustrating the sequence of tray operation based on CPU signals.
Timing charts showing the sequence and duration of tray operations.
Instructions for adjusting the tray and tray case during mounting.
Guidance on what to do when the tray disengages to the lower side.
Adjustments required after replacing the sub-chassis (VAM1252).
Additional adjustments and notes, including loading wire winding.
Instructions for adjusting the tray and tray case during installation.
Procedures for when the tray disengages downwards.
Adjustments needed after replacing the sub-chassis (VAM1252).
Other adjustment points and notes, including loading wire winding.
Explanation of USA and European wiring standards for XLR connectors.
Pin configuration for the USA system (Pin 2=COLD, Pin 3=HOT).
Pin configuration for the European system (Pin 2=HOT, Pin 3=COLD).
Clarification that the CD-7 uses the USA system and phase inversion possibility.
Description of Filter-1's impulse response and sound quality.
Description of Filter-2's impulse response and sound quality.
Description of Filter-3's impulse response and sound quality.
Instructions on how to select different digital filter types using the button.
Details on mute, attenuation, de-emphasis, and signal format for DSP-1.
Details on digital filter, noise shaper, and output offset for DSP-2.
Explanation of how DSP loads parameters and starts processing on power-on.
Information on how filter and sampling frequency shifts affect parameters.
How mute and de-emphasis switches control DSP pins directly.
Methods to confirm DSP operation and status via pin control.
A list of chip resistors with their part numbers and specifications.
A list of diodes with their part numbers and specifications.
A list of transistors with their part numbers and specifications.
List of resistors from RD33 to RD92 with their specifications.
List of resistors from R401 to R456 with their specifications.
List of resistors from R457 to R712 with their specifications.
List of resistors from R713 to R788 with their specifications.
List of diodes from DD01 to DD74 with their specifications.
List of diodes from D403 to D774 with their specifications.
List of transistors from QD01 to QD22 with their specifications.
List of transistors from QD51 to QD56 with their specifications.
List of transistors from QD57 to Q777 with their specifications.
List of miscellaneous components for the PA16 board.
List of capacitors for the PP16 board.
List of capacitors from C309 to C858 with their specifications.
List of chip resistors RN02 to RN27 with their specifications.
List of fixed resistors RT01 to RT05 with their specifications.
List of resistors from R339 to R165 with their specifications.
List of semiconductors for the PV16 board.
List of semiconductors QF01 to QM12 with their specifications.
List of semiconductors QM01 to QM12 with their specifications.
List of semiconductors Q501 to Q513 with their specifications.
List of capacitors for the PY26 board.
List of chip resistors RY11 to RY38 with their specifications.
General
