Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for Sony DVP-NC650
Summarization of Contents
What's New
Physical Differences
Details physical changes in 5th generation DVD players compared to previous models.
Features
Lists capabilities like MP-3 playback, various audio/video outputs, and multi-format disc support.
Dual Laser Optical Block
Explains the use of two lasers for optimal reading of different disc types, including burned discs.
Disc Warp Correction
Describes the Dynamic Tilt Correction (DTC) system for maintaining focus on warped discs.
Disc Identification
Explains how the player identifies disc types by analyzing laser reflection and layer depth.
Super Audio Compact Disc (SACD)
Details the three types of SACD discs (Single Layer, Dual Layer, Hybrid) and their playback.
Logos
Shows logos indicating SACD playback capability on high-end products.
Video Noise Reduction
Explains Block Noise Reduction (BNR) for smoothing video edges and improving picture quality.
Digital Video Enhancer & Block Noise
Discusses the Digital Video Enhancer (DVE) and its interaction with BNR for optimized video processing.
Power Supply
Additional Regulators
Details the additional regulator circuits used in the power supply for various functions.
Primary Side Measurements
Provides measurement values and locations for primary side power supply checks.
Plug-In Communications
Outlines the sequence of IC communications during the unit's power-on process.
Serial Data Communications
Explains serial communication protocols between ICs after the system powers up.
Parallel Data Communications
Describes parallel data bus communication between system control and other ICs.
Testing and Test Point Access
Photo Detector Signals
Lists photo detectors and the signals they generate for DVD/CD tracking and focus.
RF Output Access
Guides on accessing and measuring RF output test points for diagnostics.
Alternate RF Test Point
Shows alternative locations for RF signal measurement on the circuit board.
RF Measurements Locations III
Identifies specific test points for RF measurements on the MB-101 board.
RF/Servo Measurements I
Presents expected RF/Servo waveforms for DVD and CD playback measurements.
Focus and Tracking Error Test Points
Locates test points for measuring Focus (FE) and Tracking Error (TE) signals.
RF/Servo Measurements III
Shows expected TE and FE waveforms for servo system checks.
Testing
Servo and Optical Assembly Testing
Explains testing procedures for servo and optical assembly functions using a test disc.
Entering Service / Test Mode
Provides steps to access the service/test mode using remote control buttons.
Focus Servo Testing
Demonstrates focus servo operation and waveform analysis during testing.
Verifying Focus Layer Jumping
Details how to test layer jumping functionality on dual-layer discs in service mode.
Tracking Servo Checks
Lists ICs responsible for tracking servo operation and identifies TE signal checks.
Checking the TE Signal
Guides on checking the traverse TE signal level and DC-level in service mode.
TE Traverse Check
Explains dynamic checks of servo detectors during disc track/layer movement.
Jigs and Tools
Lists essential extender cables and jigs required for accessing and testing internal components.
Troubleshooting
Process Flow
Introduces flowcharts for diagnosing common symptoms like No Power or No Test Mode.
No Test Mode Menu
Diagnoses issues preventing access to the test mode, focusing on clock and communication failures.
No Power Troubleshooting
Provides troubleshooting steps for the "No Power" symptom, checking sensors and VCO voltage.
Laser Current Check
Details how to safely check laser diode current by measuring voltage drop on emitter resistors.
INT Signal Check
Explains how to check interrupt signals between key ICs for troubleshooting.
Service / Test Mode
Initial Communications
Emphasizes verifying IC communication before accessing test mode or powering the unit.
Entering the Test Mode
Step-by-step guide on how to activate the service test mode using the remote.
Contents of the Test Mode
Describes the main diagnostic menus available within the test mode, such as Syscon Diagnosis.
Mechanical Operation
Powering the Unit
Explains how to connect and power on the unit, including front panel connections.
CD Mechanism Normal Operation
Details the process of disc loading, switch states, and CD playback initiation.
Disc Mechanism Access
Guides on accessing and removing the disc mechanism for service.
Gear Alignment Procedures
Covers the alignment procedures for various gears within the CD mechanism.
Disc Loading Process
Describes the disc loading detection and motor operation sequence.
Disc Position Switches
Lists the states of disc position switches for different modes (No Disc, Loading, Disc IN).
CD Playback Sequence
Explains the clamp motor activation and laser platform positioning for CD playback.
Stacker Disc Storage
Describes how the mechanism handles storing discs in the rear stacker before extraction.
Stacker Height Encoder Alignment
Details the alignment of the stacker height encoder gear for proper disc acceptance.
Stacker Alignment Area
Shows the area and test procedure for stacker gear alignment.
Disc Entry Lockout Gear Alignment
Explains the alignment of the disc entry lockout mechanism to prevent multiple disc insertions.
Clamping Motor Encoder Alignment
Describes the alignment of the clamping motor encoder for setting operational limits.
Disc to Stacker Gear Alignment
Details the gear alignment for positioning rear rollers to move discs to/from the stacker.
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