Sony DVP Service manual

DVP-NS415

Training Manual

DVP-NS655P

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

DVP-NS875P

Circuit Descriptions & Troubleshooting

Table of Contents

1. What’s New?......................................1

Physical Differences............................................. 1

Features ................................................................. 2

Dual Laser Optical Block ..................................... 3

Disc Identification .................................................. 5

Super Audio Compact Disc (SACD) .................. 6

Logos ...................................................................... 7

Video Noise Reduction ........................................ 8

2. Block diagram ..................................10

3. Power Supply ...................................12

Plug-In Communications .................................... 15

4. Testing and Test Point Access.......18

5. Testing ...............................................22

Jigs and Tools ....................................................... 25

6. Troubleshooting...............................27

Process Flow........................................................ 27

7. Service / Test Mode .........................32

8. Mechanical Operation .....................35

Powering the Unit ................................................. 34

CD Mechanism Normal Operation .................... 35

Disc Loading, Stacker and Disc Clamping

Motor Drive Access.............................................. 37

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.

Physical Differences

The single disc players are thinner than the previous fourth generation models and take up less vertical space. Some models are available in both black and silver (same model number) to blend with different decors. Two models, DVP-F25 and DVP-F41, have slot type loading (like a car CD player) which makes them smaller; they can also be played horizontally or vertically; a pedestal base can be attached to the side for vertical mounting, as in Figure 1-1.

DVD slot

Models DVP-F25 / F41

FIGURE 1-1 - VERTICAL MOUNTED “F” SERIES DVD PLAYER

1. What’s New?

Features

These players can play computer “burned” -R and +RW (CD or DVD) discs. A built-in MP-3 decoder allows MP3 encoded CD’s to be played. All 5th generation players have outputs for composite video, component video (Y, R-Y, B-Y) and Dolby Digital ™ / dts ® digital coax/optical digital audio (except DVP-F25 and DVP-F41 models which only have high grade component video and optical audio outputs) 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

Year *

DVP-NS300 2001 1 disc tray Case = Blk or Silver finish. Does not

DVP-NS315 2002 1 disc tray Black or Silver finish DVP- NS400D 2001 1 disc tray Built in 5.1 Digital Dolby Decoder DVP- NS415 2002 1 disc tray Silver, Built in 5.1 Digital Dolby

DVP- NS500P 2001 1 disc tray Progressive scan DVP- NS700P 2001 1 disc tray Progressive scan DVP- NS715P 2002 1 disc tray Progressive scan, Silver DVP- NS755P 2002 1 disc tray Progressive scan, SACD, Built in 5.1

DVP-NC600 2001 5 disc Changer No thinner case like the tray units. DVP-NC650 2001 5 disc Changer SACD DVP-NC655P 2002 5 disc Changer Progressive scan, Blk/Silver. DVP-CX875P 2002 300 disc changer Progressive scan, Built in 5.1 Digital

DVP-F25 2002 1 disc slot Case = Blk or Silver finish. DVP-F41MS 2002 1 disc slot Memory stick for JPEG pix view

Type Feature

PB –R or +RW discs.

Decoder

Digital Dolby Decoder, Blk.

Dolby Decoder.

* Optical Assemblies for 2001 year Models are KHM240AAA and KHM250AAA Optical

Assemblies for 2002 year Models are KHM270AAA and KHM275AHA.

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. To insure full compatibility, the optical block uses two lasers. One is optimized for CDs and the other for DVDs.

To understand how separate lasers insure playback of computer burned discs, some basics are explained here. The reflected Laser light from the disc to the optical block contains the data. DVD discs (including DVD-R and

+RW discs) reflect best in the 650-635nM wavelength band. CD discs (including –R or +RW discs) reflect light best at 780nM.

Figure 1-2 shows that maximum CD-R disc reflection (RF) occurs at 780nM. Since –R or +RW discs have lower reflectivity than stamped discs (reflectivity also varies from brand to brand) output is maximized if two lasers are used: one operating at 648nM for DVDs and another at 780nM for CDs.

Optical Pick -up

Reflective Intensity for CD-R

650nM

780nM

Wavelength

FIGURE 1-2

CD = 1.2cm

DVD=0.6cm

KHM-240

Lens

For CD

For DVD

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. In earlier generations, a tilt servo (A) adjusted the angle of the laser platform to keep the monitored RF level at peak. This system is complex and the platform can “bottom out”, limiting its range.

DISC

WHOLE

ASSEMBLY

ROTATES

FROM

HORIZONTAL

A TILT SERVO WARP

DISC COMPENSATION

DISC

MOTOR

PIVOT

LENS

ASSEMBLY

LENS

ASSEMBLY

LENS

OPTICAL

PIVOTS UP

PIVOTS

DOWN

(LIMITED RANGE)

ASSEMBLY

HORIZONTAL

ILLUSTRATES

ROTATION OF

LENS ONLY

WHOLE

ROTATES

FROM

DISC

B DTC WARP

DISC COMPENSATION

OPTICAL

ASSEMBLY

LENS

OPTICAL

ASSEMBLY

ASSEMBLY REMAINS

FIGURE 1-3 - TILT SERVO (A) VS. DTC (B)

HORIZONTAL

ILLUSTRATES

ROTATION OF

LENS

ONLY

HORIZONTAL

GGW5 1545 4/9/03

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. This is considered as the

mechanical focus center of the lens. As the optical block moves towards the outside of the disc, disc warp increases. At the points where the disc is angled up by warp, the focus point also moves up to compensate. Raising the focal point causes the lens to change its angle and remain perpendicular to the disc. Conversely, when the disc angles down (Figure 1-2 B), the lens focus goes below center and the lens tilts in the opposite direction.

Mechanically, DTC is achieved by modifying the lens supports. The front lens supports are stronger than the rear. See Figure 1-4. As the lens moves up, it is tilted toward the weaker support. As it moves down, the lens is tilted toward the stronger support. The tilt is always in the direction of the warpage so the lens remains perpendicular to the disc.

Figure 1-4 - Lens Retaining DTC System

Lens

Weak Rear Support

Stronger Front Support

FIGURE 1-4 - DTC SYSTEM

Disc Identification

The DVD player first determines what type of disc is in the tray before playing it. The player powers up one of the lasers and begins looking for the disc’s information layer(s). The time it takes to find a layer determines how deep the layer is inside the disc (T=0.6cm, 2T =1.2cm). Because the tracking servo is disabled at this time, the lens will continue past the focus point of the DVC and look for a second information layer (DL disc). The disc ID method is shown in Figure 1-5. This procedure is repeated with the second laser to insure identification of the lower output –R and +RW discs.

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 Type

DVD/ SACD

1.2 CM

0.6 CM

DISC IDENTIFICATION

INFO LAYER

DISC ENTRY

INFO LAYER

DISC ENTRY

2nd LAYER

1st LAYER

DISC ENTRY

SACD layer CD layer

SACD-

Hybrid

0.6 CM

CD layer HD LAYER

1.2 CM

DISC ENTRY

FIGURE 1-5 - DISC IDENTIFICATION

Super Audio Compact Disc (SACD)

There are three types of SACDs, all played from the bottom of the disc (disc is not flipped over): See Figure 1-6.

1. Single Layer: The single high-density (HD) layer can contain 2 channel and multi-channel DSD recordings, text (such as song tiles and lyrics), video clips and graphics.

hybrid

1. What’s New?

Single layer disc

Hybrid disc

layer

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.

Dual layer disc

2 HD layers

CD layer

FIGURE 1-6 - SACD TYPES

Logos

High-end products that can play one or all versions of SACD discs have at least one of three of the logos shown in Figure 1-7.

Front L Center Front R

Subwoofer

Rear L Rear R

FIGURE 1-7 -SACD LOGOS

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. Picture details, even very small once, are not effected.

1. What’s New?

FIGURE 1-8 - BLOCK NOISE REDUCTION

Digital Video Enhancer (DVE)

DVE corrects the frequency response of the video signal and emphasizes picture details, see Figure 1-9. Since DVE (Digital Video Enhancer) emphasizes BLOCK NOISE, the BNR circuit is used before the DVE .

DVE = Digital Video Enhancer

it emphasizes picture details

: Original Signal

: Optimized Signal

FIGURE 1-9 - DIGITAL VIDEO ENHANCER

Digital Video Enhancer & Block Noise

Former generation (year 2000)

Reduction

DVEDVE

DVE

5th generation

Might emphasize

Block Noise!

1. What’s New?

BNR

At first,reduce

At first,reduce Block Noise.

Block Noise.

No emphasis of Block Noise, clear edge and

No emphasis of Block Noise, clear edge and details retained.

details retained.

DVEDVE

DVE

FIGURE 1-10 - BNR AND DVE ORDER

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”).

• No External RAM for Syscon IC.

• Block Noise Reduction IC.

• ARP and Servo DSP is combined in one IC.

Base Unit

DVD/CD

PD IC

Focus

Coil

Tracking

Coil

INLIMIT

Sensor

SP_Motor

Sled Motor

Motor

Chuck Tray

Detect

16MB DRAM

16/ 64MB

SDRAM

BNR

RF Amp

ARP

Servo

DSP

CDDOUT

CDData

CDBCK/LRCK

Parallel Bus

Decoder

V,Y,C

SPDIF OUT

Video Buffer

SPDIF

FLASH or OTP

Focus / Tracking

Coil Drive, Spindle / Sled/ Loading Motor

Drive

EEPROM

SACD

DECODER

Syscon

SACD

BASS

Manag.

Audio

DSP

Receiver RC

)

Regulator

IF Con

Fn Key

Audio

D/A

Converter

ND401

FLD

FIGURE 2-1 - BLOCK DIAGRAM

2. Block Diagram

CIRCUIT BOARDS LOCATION DVP-NS400/700 POWER BLOCK (HS15S1U) NS500V) (SWITCHING REGULATOR) HS13SO3 IN -NS400

SI-31 (REMOTE COMMANDER RECEIVER) NOT IN -NS400

AI-23 FOR NS-400 (COMPLETELY DIFFERENT, INCLUDES: AUDIO/VIDEO/ INTERFACE CONTROL

AV-59 NOT IN -NS400 (AUDIO/VIDEO OUT)

ER-15 IN -NS400

MS-81 (LOADING)

IF-84 (INTERFACE CONTROL)

MB-101 (SIGNAL PROCESS, SERVO) MB-98 IN -NS400

FIGURE 2-2 - CIRCUIT BOARD

Table 2-1 - MB Board Main IC Functions

IC Name DVP-NS400

Ref Number

RF Amp /

IC202 IC201 DVD/CD RF Amp,

Digital

DVP-NS700 Ref Number

Purpose

Servo

Servo EEPROM IC101 IC101 Servo Setting Data,

Emer. History, Hour meter, Disc Parameters.

Flash / OTP

IC107 IC106 &

IC107

Start up instructions /

sequence ROM Syscon IC103 IC104 Overall Operation (ARP) /

Servo DSP Advanced

IC302 IC302 CD/DVD Data

Processing, Servo

Control. RF Processor

16M DRAM IC303 IC301 RAM for ARP IC302 BNR IC601 IC504 Black Noise

Reduction A/V

Decoder

IC503 IC502 MPEG2, AC-3 ®

(Dolby Digital)

decoder 64M

SDRAM Analog

IC504 /

IC507 RAM for A/V Decoder

IC505 IC401 IC202 Analog Servo Control

Servo

3. Power Supply

Chapter 3 - Power Supply

Power Supply

The 5th 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.

• Simple Stdby/Power ON controll.

Figure 3-1 shows a block diagram of the power supply:

HS15S1E BOARD: AEP, UK, AUS, E, EA, HK, KP, ME, RUS, SP, CH (SEE PAGE 4-53)

HS15S1U BOARD: US, CND (SEE PAGE 4-61)

HS15S1J BOARD: TW (SEE PAGE 4-57)

US. CND. TW

D211

D221

D311

L211

L221

L311

P311

Q211

Q311

+11V

EVER +11V

+5V

AC IN

1 2

CN101

F101

L101 LINE

FILTER

SW101

POWER

EXCEPT US. CND. TW

FILTER

EVER +3.3V

L102 LINE

Q101, 102

OSC

T101

PC101

PHOTO

COUPLER

D611

D511

L611

L511

IC301

SHUNT REG

D413

IC411

SHUNT REG

Q411

+3.3V

REG

P611

D621 (ON/STANDBY)

Q621, 622

LED DRIVE

CONTROL

Q611

Q712

POWER

SW +3.3V

EVER +3.3V

EVER

-11V

P-CONT

P-DET

FIGURE 3-1 - POWER SUPPLY

Power ON Operation

The power supply circuitry before T101 (Primary) and after (Secondary) are explained. Refer to Figures 3-1 for the block diagram. The load and additional regulators are shown in Figure 3-2.

Primary

After closing main switch SW101, oscillator circuit Q101 and the primary coils of T101starts. Regulation comes from sampling the secondary +3.3 V at L611. The sample is sent to inverter/shunt regulator IC301, to the optocoupler PC101 and finally back to oscillator Q101.

EVER +3,3V from Q411 is switched via the other leg of SW101 and is applied to power ON LED D621 (RED) drive. It is also applied to IC404/pin19 (not shown) as a P-DET signal. The output of IC404 controls the rest of the power supply secondary circuit via the P-CONT line. EVER +3.3V powers IC404, IR remote receiver, cursor stick and audio muting (all not shown).

+ 32 hidden pages