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General| Brand | Sharp |
|---|---|
| Model | CD-C451H |
| Category | Stereo System |
| Language | English |
Withstand voltage test requirements for unit safety post-repair.
Details on power, dimensions, and weight of the main CD system.
Specifications for front, center, and surround speaker output power.
Technical details for the 3-disc CD playback mechanism.
Frequency bands for FM, MW, and LW reception.
Specifications for tape playback, recording, and frequency response.
Details on woofer, tweeter, and full-range speaker components.
Identification of buttons, indicators, and sockets on the front panel.
Overview of buttons and functions on the remote control transmitter.
Details of all sockets and terminals on the unit's rear panel.
Identification of parts within the front, center, and surround speaker units.
Layout and grouping of buttons by function on the remote control.
Step-by-step guide to setting and adjusting the unit's internal clock.
Instructions for performing a system microcomputer reset.
Procedures for viewing and changing the clock display time.
Important safety and handling guidelines before disassembling the unit.
Table detailing part removal, procedure, and associated figures.
Procedure and diagrams for disassembling the front speaker enclosure.
Steps to remove the turntable up/down motor from the CD mechanism.
Procedure for removing the optical pickup assembly from the CD mechanism.
Procedures and specifications for checking mechanism torque and tape speed.
Details on tuning and adjusting FM/AM IF/RF and FM Mute Level.
Procedure for accessing various diagnostic test modes for the CD section.
Description of operations and indicators within the CD test mode.
Information on automatic adjustment items for the CD pickup assembly.
Details on output states for Bypass, Normal, and Phantom Pro Logic modes.
Procedure for checking sound output in Normal and Phantom modes.
How VIDEO IN signals affect Pro Logic output states and channel behavior.
Explanation of RDS features like station names and program types.
How to display RDS information using the DISPLAY MODE button.
Explanation of PTY codes, Traffic Programme, and Traffic Announcement.
Detailed flowchart explaining the ASPM scanning process for stations.
How ASPM memorizes stations based on field strength and PI code.
Comparison of RDS features between CD-C75H and CD-C471H models.
How EON-PTY and EON-TI functions enable automatic station switching.
Detailed explanation of EON indicators and button operations.
Table of Traffic Programme (TP) and Traffic Announcement (TA) codes and applications.
Explanation of symbols used for resistors and capacitors in diagrams.
Notes on voltage measurements, signal indications, and part markings.
Diagrams showing common transistor and LED types used in the unit.
Block diagram illustrating the CD mechanism control circuitry.
Block diagram showing tuner, RDS, playback amp, and audio processor sections.
Block diagram illustrating power amplifier, microcomputer, and power supply circuits.
Detailed schematic of the pickup unit and CD motor control board.
Schematic of the servo and signal control IC (LC78622K).
Schematic of the system microcomputer (IX0170AW) and audio processor.
Schematic showing components on the main PWB, including op-amps and processors.
Schematic of the tape mechanism control board and related components.
Schematic of the playback and record amplifier IC (AN7345K).
Schematic showing the microcomputer's interface with display and other controls.
Schematic of the switch PWB and display PWB components.
Schematic of the power amplifier PWB showing output stages and regulators.
Schematic of the power transformer, fan motor, and speaker output connections.
Schematic of the FM front end section and the tuner IC (LC72131).
Schematic of the RDS decoder IC (LC72720) and associated circuitry.
Tables listing pin voltages for various ICs in the unit for diagnostic purposes.
Wiring layout for the display and switch PC boards.
Wiring layout for the main PWB, showing connections to various sections.
Further wiring details for the main PWB, including connectors and audio outputs.
Wiring layout for the tape mechanism and pickup unit assemblies.
Wiring layout for the CD servo and CD motor control boards.
Wiring layout for the power supply PWB, showing connections to speaker terminals.
Wiring layout for the power transformer and AC power input connector.
Wiring layout for the tuner PWB, showing antenna and output connections.
Oscilloscope waveforms related to focus servo operation (STOP to PLAY).
Oscilloscope waveforms for tracking servo operation and CUE/REVIEW.
Oscilloscope waveforms illustrating disc spin system operation.
Troubleshooting steps when the CD section does not operate.
Steps to diagnose and fix issues with the turntable failing to stop or move.
Troubleshooting steps for problems with the CD tray mechanism.
Steps to diagnose unresponsive CD keys or playback failures.
Checks for focus servo activation and disc presence for playback.
Troubleshooting DRF signal changes and tracking servo system issues.
Diagnosing turntable rotation issues when playing without a disc.
Troubleshooting TOC data read errors despite normal HF waveform.
Steps to take when audio output is absent despite normal signal conditions.
Table detailing pin functions for the servo/signal control IC.
Continuation of pin function details for the servo/signal control IC.
Pin function details for the servo amplifier IC.
Pin function details for the servo amplifier IC.
Block diagram illustrating the internal functions of the servo amplifier IC.
Pin function details for the system microcomputer IC.
Continuation of pin function details for the system microcomputer IC.
Block diagram illustrating the functions of the system microcomputer.
Pin function details for the system microcomputer IC.
Continuation of pin function details for the system microcomputer IC.
Block diagrams of the audio processor and Dolby Pro Logic decoder ICs.
Pin function details for the audio processor IC.
Pin function details for the RDS decoder IC (LC72720).
Block diagram of the RDS decoder IC.
Diagram showing the front panel FL display segments and indicators.
Notification regarding printing errors in the service manual's parts list.
Specific part number corrections for the CD-C471H model.
Notification regarding changes in part codes for service manuals.
Specific part number corrections for fuses F802 and F804.
Information about changed part codes for CD-C440/C470/C471 series.
Correction for the replacement part number of the tape head assembly.
Instructions for ordering replacement parts, including required information.
Explanation of coding systems used for capacitor and resistor part numbers.
Important notes regarding the replacement of safety-critical parts.
List of transistors used, including part codes and descriptions.
List of diodes used, including part codes and descriptions.
List of filters used, including part codes and descriptions.
List of transformers used, including part codes and descriptions.
List of coils used, including part codes and descriptions.
List of variable resistors used, including part codes and descriptions.
List of vibrators used, including part codes and descriptions.
Continuation of capacitor part list, detailing various types and values.
Final section of the capacitor part list.
Concluding part of the capacitor part list.
Continuation of resistor part list, detailing various types and values.
Final section of the resistor part list.
Concluding part of the resistor part list.
List of other electronic components like connectors and fuses.
List of parts related to the unit's cabinet and structural components.
List of parts for the CP-C471H speaker system.
List of parts included for packaging the unit.
List of parts for the center speaker system.
Additional packing parts list.
Additional packing parts list for surround speakers.
Detailed exploded view of the CD mechanism assembly.
Exploded view showing the assembly of the main unit's cabinet and internal boards.
Exploded view showing the CD mechanism, chassis, and related parts.
Exploded view of the front speaker, showing woofer, tweeter, and super tweeter.
Exploded view of the center speaker assembly.
Exploded view of the surround speaker assembly.
Guidelines for packing the main unit, including accessories.
Guidelines for packing the center and surround speaker systems.
Diagram showing the front panel FL display segments and indicators.
