Sony HCD-H55 Service Manual

Power output and total harmonic distortion details for US models.

Details about the FM and AM tuner specifications.

Specifications related to the CD player mechanism.

Details about the cassette deck mechanism types.

Specifications for the amplifier section, including power output.

Identification of various parts of the unit.

Detailed descriptions of the tuner, amp, CD, and deck sections.

Procedures for disassembling major component blocks.

Post-repair safety checks for AC leakage current.

Procedures for checking laser diode and focus operation.

Precautions for handling the optical pick-up block.

Method to open the disc tray when the power is off.

Instructions to protect eyes from laser radiation during service.

Step-by-step guide to setting the unit's clock.

Instructions for automatic and manual radio tuning.

Information about time display and power interruption effects.

Steps to store and recall radio stations.

Guidance on adjusting the antenna for optimal reception.

Adjusting volume, bass, and overall sound quality.

Activating the S-SUR effect for simulated surround sound.

Connecting headphones for personal listening.

Steps for playing a CD, including controls.

Warning about adjusting volume with low-level inputs.

Basic controls for stopping and pausing CD playback.

Using AMS to locate track beginnings and specific points.

How to change and view information display modes.

Searching for audio points while listening.

Quick search using pause mode and display observation.

How to play CD tracks in a random sequence.

How to create a custom playback sequence for a CD.

How to repeat CD tracks or the entire disc.

Steps for playing a cassette tape.

Setting Dolby NR for tapes with noise reduction.

Checking, adding, and erasing cassette programs.

How to check the remaining time on a cassette tape.

Playing tapes sequentially from deck A to deck B.

Step-by-step guide for recording onto a cassette tape.

Methods for protecting and re-recording cassettes.

Tips for reducing whistling noise during MW/LW recording.

Procedure for recording CD content to both sides of a cassette.

Recording specific CD tracks onto the front side of a tape.

How the CD player selects tracks based on tape length.

Steps for editing tape dubbing processes.

Setting the unit to operate automatically at a set time.

Step-by-step guide to setting the unit's timer.

Notes on Dolby NR and source selection during dubbing.

Adjusting and disabling sleep timer settings.

Notes on sleep timer behavior and manual override.

Mixing microphone input and recording mixed sound.

How to prevent acoustic feedback (howling).

Procedures for disassembling case, power, and main boards.

Procedure for disassembling the CD block.

Procedure for disassembling the cassette deck block.

Procedure for disassembling VR, display, jack, and SW boards.

Precautions to follow before performing mechanical adjustments.

Measurement of torque for various mechanical parts.

List of test tapes required for deck adjustments.

Procedure for adjusting the record/playback head azimuth.

Procedure for entering and using the Timer Test Mode.

Information on default tuner frequencies after system reset.

Step-by-step procedure for adjusting tape speed.

Location of parts for tape speed adjustment.

Explanation of screen patterns used for azimuth adjustment.

Adjustments specific to the FM section.

Adjustments specific to the AM section.

Procedure for checking the S-curve waveform.

Procedure for checking and adjusting RF signal levels.

Procedure for checking the RF PLL free-run frequency.

Procedure for checking the E-F balance.

Lead layouts for various semiconductor components.

Locations for adjustments on the BD and main boards.

Reference for semiconductor locations on the boards.

Block diagrams for FM front end ICs in specific regions.

Detailed pin functions for the IC505 Display Control IC.

Detailed pin functions for the IC201 CD Controller.

Explanation of the key assignments and diode matrix.

Exploded view of the case and power supply block.

List of capacitors, resistors, coils, semiconductors, connectors, ICs, and transistors.

List of capacitors for various boards.

List of jacks and transistors.

List of resistors and variable resistors.

List of switches used in the unit.

Continuation of the list of switches.

Procedure for adjusting FM polar settings.

List of capacitors and filters for the main board.

Lists for connectors, diodes, frontend, and ICs.

Lists for IFT, jacks, filters, and transistors.

Continuation of the resistors list for the main board.

List of variable resistors for the main board.

Continuation of the switches list for the main board.

Procedure for adjusting playback level for deck A and B.

Procedure for adjusting record level for Deck B.

Procedure for adjusting record bias for Deck B.

Location of adjustment points on the main board for deck section.