Do you have a question about the Sony HMC-MD777 and is the answer not in the manual?
Details specifications for CD player, MD deck, and mechanism models.
Details MD section self-diagnosis, error codes, and using error history display mode.
Explains error history mode items and lists error codes.
Precautions for handling optical pick-up, components, flexible boards, and laser emission.
Notes on chip component replacement and flexible circuit board repair.
Identifies controls on the front and rear panels of the unit.
Steps for disassembling the case, front panel, and CD/MD mechanisms.
Procedure for removing main boards like Microcomputer, Main, Relay, and BD boards.
Steps for disassembling tray, chassis, stocker, slider, and elevator assemblies.
Procedure for disassembling the over write head and optical pick-up.
Safety precautions, entering, exiting, and basic operations of the test mode.
How to select and operate specific test modes like playback and recording.
Explains functions of buttons and various displays during test modes.
Checks like laser power, traverse, and focus bias before repairs.
Detailed steps for adjustments like temperature offset, laser power, and traverse.
Procedures for checking error rates and auto gain control.
Block diagrams for CD Servo, MD Servo, Display, and Power Supply sections.
PWB layouts and schematic diagrams for various sections.
IC block diagrams and detailed pin function descriptions for various ICs.
Displays example waveforms for different boards.
Exploded views of case, front panel, chassis, and mechanisms.
Exploded views of CD base unit, MD mechanism, and MD base unit.
List of electrical parts for BD (CD) and BD (MD) boards.
Lists parts for various boards like display, jog, motor, and relay.
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