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Sony DVP-NS300 Training Manual

Circuit descriptions & troubleshooting.
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5th Generation
DVD Player
Circuit Descriptions & Troubleshooting
Training Manual


Table of Contents

   Summary of Contents for Sony DVP-NS300

  • Page 1 Training Manual DVP-NS415 DVP-NS655P DVP-NS875P 5th Generation DVD Player Models: DVP-NS300 DVP-NC650 DVP-NS315 DVP-NC655P DVP-NS400D DVP-CX875P DVP-NS415 DVP-F25 DVP-NS500P DVO-F41MS DVP-NS700P DVP-NS715P DVP-NS755P DVP-NC600 Circuit Descriptions & Troubleshooting...
  • Page 2: Table Of Contents

    Table of Contents 1. What’s New? ........1 6. Troubleshooting .......27 Physical Differences ..........1 Process Flow ............27 7. Service / Test Mode ......32 Features ..............2 Dual Laser Optical Block ........3 8. Mechanical Operation .....35 Disc Identification..........5 Powering the Unit..........
  • Page 3: What's New

    1. What’s New? Chapter 1 - What’s New? The popular fifth generation Sony DVD players introduced for the years 2001 and 2002 are physically and electrically different from previous generation players; they have greater appeal and are lower in cost.
  • Page 4: Features

    Other features on some models are: multi-format SACD music CD PB (audio); and high resolution 480p progressive video output. Table 1-1 shows some of the features of the Fifth Generation models. Table 1-1 - Sony’s Popular Fifth Generation DVD Players Model Number Intro...
  • Page 5: Dual Laser Optical Block

    1. What’s New? Dual Laser Optical Block Disc Playback Characteristics All fifth generation DVD models, (except basic model DVP-NS300) can play back computer made –R or +RW discs. Computer made (burned) –R or +RW discs have different characteristics than machine stamped counterparts and stamped CDs have different characteristics than DVDs.
  • Page 6 1. What’s New? Disc Warp Correction Because of the finer DVD pitch, the laser must be perpendicular to the disc for maximum RF output from the optical block. Figure 1-3 illustrates the differences between old servo tilt mechanism system (A) and the new DTC system (B) that keeps the laser beam perpendicular.
  • Page 7: Disc Identification

    1. What’s New? In fifth generation DVD players, an ingenious Dynamic Tilt Correction (DTC) system replaces the tilt servo. Warped disc readability is achieved by tilting the lens during focus correction. The greater the focus correction, the more the tilt. The DTC concept and mechanics are as follows: The DVD disc information layer is at a height determined by the spindle motor hub.
  • Page 8: Super Audio Compact Disc (sacd)

    1. What’s New? Figure 1-5 also shows that the laser takes the least time to find a DVD disc (Figure 1-5, B, C, or D). If a second focal point is also found, the disc is either a dual layer DVD (Figure 1-5 C) or SACD (Figure 1-5 D). DISC IDENTIFICATION Disc Type INFO LAYER...
  • Page 9: Logos

    1. What’s New? 2. Dual layer - Two layers with twice the playing time / information as a single layer. 3. Hybrid layer – Contains one HD layer and a standard CD layer so it can be played on any standard CD player too.
  • Page 10: Video Noise Reduction

    1. What’s New? Video Noise Reduction Block Noise Reduction (BNR) BNR reduces dissimilarities (noise) at the edges of blocks (Figure 1-8). Block Noise Reduction The Block Noise Reduction reduces noise at vertical rising (block) edges caused by the MPEG format. The picture looks more smother and more natural.
  • Page 11 1. What’s New? Digital Video Enhancer & Block Noise Reduction Former generation (year 2000) Former generation (year 2000) Might emphasize Might emphasize Block Noise! Block Noise! 5th generation 5th generation At first,reduce At first,reduce No emphasis of Block Noise, clear edge and No emphasis of Block Noise, clear edge and Block Noise.
  • Page 12: Block Diagram

    2. Block Diagram Chapter 2 - Block Diagram Figure 2-1 shows a block diagram of fifth generation DVD players. They have the following features: • New type of optical pickup unit. (CD or DVD laser selection not shown.) • All analog Driver functions input to one IC (“IF Con”). •...
  • Page 14: Power Supply

    3. Power Supply Chapter 3 - Power Supply Power Supply The 5 Generation power supplies have the following features: • No STANDBY circuit (Hard wire ON / OFF switch SW101). • Simple MAIN POWER SUPPLY circuit. Q101 = switching osc. Q102 / PC101 / IC301 = feedback. •...
  • Page 15 3. Power Supply Keep in mind that SW101 is a “hard off” switch. With the switch OFF, the unit will not turn ON with the remote. Soft ON/OFF(standby) is controlled by the P-CONT line and Q712: it controls +11V via Q211, +5V via Q311, and SW+3.3V via Q611.
  • Page 16 3. Power Supply Measurements on the primary side of the power supply C150 C150 ground for scope Connect the scope`s ground here Measurements values on the primary side Q101, DRAIN voltage 304,5 Vpp Q101, GATE voltage 12,5 Vpp Q102, BASE voltage 1,25 Vpp All measurements use 1:10 probe in standby mode! For safety reasons do not connect the unit to an AC out outlet!
  • Page 17: Plug-in Communications

    3. Power Supply Plug-In Communications Figure 3-6 shows the general sequence of IC communications during Plug-in time. System controller IC104 communicates with Flash Memory to retrieve the Instructions / programs. In the event the communication with the Flash Memory is not accomplished, System control will inform Interface IC 404 to switch the power to standby mode.
  • Page 18 3. Power Supply User Commands IC404 IC103/4 Display Update IFCON SYSCON Serial Clock XIFCS Chip Select XIFBSY INT4 Interrupt XFRST Stop 3.3v Pcont Ever +3,3 V Plug-In Std-By IFCONàSYSCON SYSCONàIFCON IFCONàSYSCON Start Clock/Data XFRST Red LED Green LED Red LED 1.3 Seconds FIGURE 3-7 - PLUG IN SEQUENCE Serial Data Communications after Power ON...
  • Page 19 3. Power Supply Parallel Data Communications after Power ON See Figure 3-8 The parallel data bus consists of address lines, data lines, a WE (write enable) and a RE (read enable) line, and a clock line. The parallel bus is contoleed by system control IC202. FIGURE 3-8 - COMMUNICATIONS BLOCK...
  • Page 20: Testing And Test Point Access

    4. Testing and Test Point Access Chapter 4 - Testing and Test Point Access This section is divided into two parts: 1) Test point access; and 2) testing the RF and servo sections using the service / test mode. The signals are generated by the optical assembly’s photo detectors as listed in Table 4-1. Table 4-1 - Photo Detector and Their Manufactured Signals Photo Signals...
  • Page 21 4. Testing and Test Point Access MB-101 board / side A CPUCK TP IC502 IC104 IC302 Testpunkt RF-Monitor CN104/PIN1 FIGURE 4-2 - ALTERNATE RF TEST POINT RF measurements locations III IC302 2 PIN128/RF in 2 & PIN131/RF in 1 FIGURE 4-3...
  • Page 22 4. Testing and Test Point Access RF/Servo measurements I No. 1 ~540 mV / RFMON ~460 mV / RFMON No. 2 RF in 1 & 2 of IC 302 RF in 1 & 2 of IC 302 FIGURE 4-4 Focus and Tracking Error Test Points Figures 4-5 and 4-6 show the focus test points and waveforms.
  • Page 23 4. Testing and Test Point Access Figure 8-7 RF/Servo measurements III No. 3 No. 4 FIGURE 4-6...
  • Page 24: Testing

    5. Testing Chapter 5 - Testing RF, Focus-Tracking Servo, Optical Assembly The service or test mode permits us to repeat a signal so we can see it on the scope and verify its operation. In the first test, a YEDS-18 CD test disc was used to check focus and optical assembly detectors by looking at the PI and FE signals.
  • Page 25 5. Testing Verifying Focus Layer Jumping: This check is only possible in service mode. A dual layer disc must be inserted. 1. Switch ON the “Drive Manual Operation” (2). 2. Next switch to “Disc Type” (1). Now check the inserted disc Type, select “Disc Type Auto Check”...
  • Page 26 5. Testing Testing - Tracking Servo Checks Table 5-1 lists the ICs responsible for track jump and basic servo operation. Table 5-1 - Tracking IC Responsibilities Device Servo Track Purpose Jump RF Amp IC201 Creates TE voltage Servo IC302 Sets tracking position Driver IC202 Voltage to current driver Tracing coil (Optics)
  • Page 27: Jigs And Tools

    5. Testing Testing - TE traverse check: Figure 5-9 - Traverse waveforms quickly checks the detectors dynamically. TE is disabled (turned OFF) from Figure 9 -18 screen to Earlier you checked the FE signal for symmetry (equal produce this waveform. Signal level approx. 1,6 Vpp SL disc. DC level in relation to „VC“...
  • Page 28 5. Testing Figure 5-11b - “Jigged” DVD Player Figure 5-11a - “Jigged” DVD Player Top View Top View Figure 5-11b - “Jigged” DVD Player Side View...
  • Page 29: Troubleshooting

    6. Troubleshooting Chapter 6 - Troubleshooting Process Flow This section is divided into flow charts targeted for general symptoms. A. No Test Mode Menu B. No Power C. Checking the Laser No Test Mode Menu Figure 6-1a diagnoses the symptom of No Test Mode Menu. •...
  • Page 30: Troubleshooting

    6. Troubleshooting In Figure 6-1b, missing read/write data may be caused by a power supply failure or if Syscon IC104 held is in constant reset. Trouble Shooting : No Test Mode Menu _ No 33Mhz output Std-By If the ICs are different, IC no. marked in red = NS700 Can Enter Test Mode No 33 Mhz output at Pin 77...
  • Page 31 6. Troubleshooting Figure 6-1d shows the Pins for “Chip Select” of the System Controller. Check the source of the signal if the chip select pins do not carry any signal and/or if they are constantly at a fixed voltage. Trouble Shooting : No Test Mode Menu ( 33Mhz output OK If the ICs are different, IC no.
  • Page 32 6. Troubleshooting No Power Several simple things can cause NO Power in this DVD player: Refer to Figure 6-2. In-limit Sensor: If a In-Limit sensor is defective, IC302 will cause the System Controller to shut off power. Also, check the “INLIM” sensor signal to ARP. If there is no change in the voltage at Pin 166 of ARP (IC302), check the “INLIM”...
  • Page 33 6. Troubleshooting Emitter current I is calculated as: I =V/R . Since in our example R consists of two parallel resistors, the equation becomes I =V/(1/(1/R207)+(1/R208)). In our example V=0.9V and the emitter resistors are both 33 ohms, so the calculation becomes I =0.9/(1/(1/33)+(1/33)) = 0.9/(1/(0.030)+(0.030) = 0.9/16.6 = 0.054A or 56mA.
  • Page 34: Service / Test Mode

    7. Service / Test Mode Chapter 7 - Service / Test Mode Service mode testing consists of the following: 1. Initial Communications 2. Entering the Test Mode 3. Contents of the Test Mode Initial Communications Initial communications must occur before the unit remains ON and the test mode can be accessed. Therefore, if the unit does not power up, you must confirm the communications between a pair of ICs.
  • Page 35 7. Service / Test Mode Entering the Test Mode Figure 7-2 shows how to enter the test mode. Once in the test mode, there are six main diagnoses in the test mode menu. TEST MODE Press TITLE CLEAR POWER Please use Remcon (previous generation) for using Numbered keys Model code FIGURE 7-2 - ENTERING THE TEST MODE...
  • Page 36: Powering The Unit

    8. Mechanical Operation Chapter 8 - Mechanical Operation The model DAV-C770 / C990 is an AM/FM 5.1 channel receiver with a 5 disc CD/DVD player. The CD/DVD service information is found in the core HCD-C770 / C990 service manual. The core manual does not have part numbers for the AM antenna, speakers and remote (1-477-332-11).
  • Page 37: Mechanical Operation

    8. Mechanical Operation 1. Remove the top cover, unplug black connector CN807 (power ON to micro) and lay the top panel on the side. Do not shear or disconnect the white ribbon connector (CN814 to CN005). 2. Plug the unit into AC and press the power ON button. The unit will not power ON until the micro receives the power ON via CN807.
  • Page 38 8. Mechanical Operation Mode 17 18 Switch boards All switches = Open a) No Disc Switch boards B) Loading Switch boards c) Disc IN FIGURE 8-4 - DISC SWITCH STATES Table 8-1 - Disc Position Switches Mode SW-18 SW-17 SW-16 SW-15 SW-14 SW-13...
  • Page 39: Disc Loading, Stacker And Disc Clamping Motor Drive Access

    8. Mechanical Operation Stacker Disc Storage If another disc is selected for PB, the mechanism will release the clamped disc and store it into the rear stacker compartment before extracting the second disc. The clamping motor reverses to release the disc into the rollers and engage the rear stacker rollers.
  • Page 40 8. Mechanical Operation Stacker Motor Drive Disc Loading Drive Disc Clamping Drive Rotary Encoder 2 FIGURE 8-6 - DISC MECHANISM - BOTTOM VIEW Gear Alignment (Concepts, Procedure and Testing) The CD Mechanism gear alignment is grouped into functional names for ease of use: 1.
  • Page 41 8. Mechanical Operation Stacker Alignment Area Test: By rotating the large stacking gear while watching the stacker for free vertical travel. Stacker Alignment Area FIGURE 8-7 - STACKER GEAR ALIGNMENT AREA Wide tooth faces boss FIGURE 8-8 - ROTARY ENCODER 1 ALIGNMENT...
  • Page 42 8. Mechanical Operation Rotate screws and drop stacker pin into slot. Stacker gear alignment hole FIGURE 8-9 - STACKER GEAR AND SCREW ALIGNMENT Disc Entry Lockout Gear Alignment Concept: This single gear alignment prevents another disc from being inserted by locking the entry roller guides from moving when a disc is clamped.
  • Page 43 8. Mechanical Operation Clamping Motor Rotary Encoder 2 Alignment Concept: Rotary encoder 2 (S701) sets the clamping motor limits. Since these gears also control the rear disc rollers, an encoder 2 misalignment can cause the disc not to travel to the rear stacker or grab the disc during PB (no spinning).
  • Page 45 8. Mechanical Operation Shaft = Down Cam BU U/D = CW FIGURE 8-15 - DISC CLAMPED, ROLLERS DISENGAGED MECHANISM POSITION...
  • Page 46 SACD are trademarks of Sony Electronics Dolby Digital is a registered trademark of Dolby Laboratories Licensing Corporation dts is a registered trademark of Digital Theater Systems, Inc. ©2003 Sony Electronics Inc. EMCS - A Service Company 1 Sony Drive...

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