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Information for authorized YAMAHA service personnel regarding product servicing and safety.
Detailed technical specifications for the audio output, input sensitivity, frequency response, and distortion.
Technical specifications for video signal types, levels, and frequency response.
Procedure for removing the top cover, including screw and sliding instructions.
Procedure for removing the front panel, including screw and sliding instructions.
Procedure for removing the sub chassis, including rivets and screws.
Procedure for removing the DSP P.C.B., including screws and bracket removal.
Procedure for removing the FUNCTION (3) P.C.B., including screws and connector disconnection.
Procedure for removing multiple P.C.B.s and the tuner, involving screws and connectors.
Procedure for removing the fan assembly, including rivets, screws, and cover removal.
Procedure for removing the OPERATION (5) P.C.B., including screws and connectors.
Procedure for removing the amplifier unit, including rivets, duct, and screws.
List of necessary equipment for firmware updating, including PC, software, and cable.
Steps for preparing the firmware update, including downloading program and firmware.
Initial steps for firmware update: connecting cable and selecting program type/port settings.
Overview of diagnostic menu items from No. 1 to No. 11 and their sub-menu functions.
Diagnostic checks for AD data, fan, video conversion status, and information status.
Procedure to start DIAG mode by pressing specific unit keys simultaneously.
Procedure to start DIAG mode with protection functions disabled for diagnosis.
Steps to cancel DIAG mode, including preset settings and power off.
List of functions available in DIAG mode, excluding tuner and set menu operations.
Initial settings applied when starting DIAG mode, which are restored upon cancellation.
Procedure for checking FL display segments, driver, and lattice lighting.
Procedure for checking image control section, requiring monitor and video cables.
Procedure for outputting test noise through specified channels with built-in DSP.
Checking data transmission and flow port operation via RS-232C terminal.
Menu for reserving and inhibiting backup RAM initialization.
Procedure for checking AD data and fan status, including voltage and temperature measurements.
Detection of power supply voltage and DC/FAN OUT protection values.
Detection of front and rear heat sink temperatures.
Detection of power limiter values and control of IC505 output.
Checking key functionality and mapping tables for different models.
Display of microprocessor status data in hexadecimal notation, covering multiple bytes.
Signal processing status for digital signals, indicating through processing method.
Channel status information (IEC60958) and bit stream data for dts/Dolby Digital signals.
Self-diagnosis of bus connection for YSS930 and external RAM.
Selection of SW mode (PCB/SOFT) and model (V2500/V4500).
Display of microprocessor information including version, checksums for various areas, and PCB model.
Procedure for checking and confirming the idling current of the amplifier unit.
Block diagrams for DSP, Operation, and Input sections, showing internal signal flow.
Block diagrams for Function, Power, and Control sections, illustrating signal paths and components.
Block diagrams showing video signal processing, including RGB encoder and Chroma decoder.
Block diagrams for audio signal processing, including DACs and input selectors.
Foil side view of the DSP P.C.B. (Side A) with component locations.
Foil side view of the DSP P.C.B. (Side B) with component locations.
Foil side views of FUNCTION (1) and (2) P.C.B.s (Side A and B).
Foil side views of FUNCTION (2), (3), (4) P.C.B.s (Side A and B).
Foil side views of INPUT (1) and (2) P.C.B.s (Side A and B).
Foil side views of FUNCTION (1), (2), (3), (4) P.C.B.s (Side A and B).
Foil side view of FUNCTION (3) P.C.B. (Side B) with semiconductor locations.
Foil side views of OPERATION (1) P.C.B. (Side A and B).
Foil side views of FUNCTION (5), (6) P.C.B.s (Side A).
Foil side views of CONTROL P.C.B. (Side A and B).
Block diagram of the DSP section, showing internal components and signal flow.
Diagram of the DSP core, DRAM interface, and A/D converter.
Schematics for analog input processing, including selectors and buffers.
Schematic of the FL driver and its control circuitry, including ICs and buttons.
Schematics for main amplifier stages, showing speaker outputs and BTL circuitry.
Schematics for power amplifier stages, including output transistors and protection circuits.
Schematics for power supply circuits, including transformers and voltage regulators.
Schematics for analog input processing and selectors.
Schematics of the microprocessor interface and control circuitry.
Schematics for sync processing, video circuits, and digital interfaces.
List of electrical components with part numbers, descriptions, and abbreviations.
List of parts for the FUNCTION PCB, including connectors, capacitors, and ICs.
List of parts for the OPERATION PCB, including switches, diodes, and capacitors.
List of parts for the MAIN PCB, including capacitors, diodes, and ICs.
List of resistors on the INPUT P.C.B., including part numbers and values.
List of parts for the CONTROL P.C.B., including PCBs, connectors, capacitors, and ICs.
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