Sony DVD 02 Schematic

S®

Digital Video
Player

Training Manual

Circuit Description and Troubleshooting

Course: D VD-02

Course Description
and Troubleshooting:

Model: DVP-S530D

Prepared by: National Training Department

Sony Service Company
A Division of Sony Electronics Inc.

Course presented by______________________________________
Date___________________________________________________
Student Name ___________________________________________

Sony Service Company

A Division of Sony Electronics Inc ©1999

All Rights Reserved

Printed in U.S.A.

“DTS” is a trademark of Digital Theater Systems, Inc.
“AC-3” is a trademark of Dolby Laboratories Licensing Corporation.
“Dolby” and “Dolby Surround” are trademarks of Dolby Laboratories

Licensing Corporation.
“Sony” and “Digital Cinema Sound” are trademarks of Sony .
“THX” is a trademark of Lucasfilm, Ltd.

Table of Contents

Introduction to the DTS Audio Format 1

What is DTS? 2
What do I need to play the DTS surround format? 2
What do I need to play both the AC-3 and

DTS surround formats? 2
Will a 5.1 channel DTS CD play in my CD player? 2
Why won’t my older DVD player play DTS DVDs? 3
Can DVD movies contain both DTS and AC-3

audio tracks? 3
How does DTS work? 3

Board Layout 5
DVD Features 6
Block Diagram 7

Power Supply 7
Communications 7
Servo Control 7
Video and Audio Processing 9

Power Supply Block 11

Standby Power Supply 11
Main Power Supply 11
Power Consumption 11

Oscillator Frequencies 11

Standby Oscillator 13

Start 13
Run 13

Regulation Concept 13
Regulation Circuitry 13

Main Oscillator 15

Enable 15
Start 15
Run 15
Regulation 15

Power Control 17

Plug In 17

Communications Block 21

Serial Data 21
Parallel Data 21

Serial Data Communications 23

Serial Bus 0 23
Serial Bus 1 25

Parallel Data Communications 27

Communications from IC202 to Other ICs 29
Communications from a Destination IC to IC202 29

Mechanism 31

Disc Tray and Laser Platform Position 31
Tilt Motor 32
Power ON Mechanical Sequence - No Disc 34
Power ON Mechanical Sequence - DVD Disc 35

Tray Motor Drive 37

Initial Sled Motor Drive 41

Manually Driving the Tilt Motor 71

Initial Sled Movement 41
Home Position Detection 45

Laser Servo 47
KHM-220A DVD Optical Block 49

DVD Focus 49
CD Focus 49
Three Laser Beams from One Laser 50
Photo Detectors 51

Disc Identification 53

Operation 5 3
SACD Disc Type 53

Focus 55

Search 55
Servo 55
Focus Drive 57
Focus Search Communications 57

A/V Processing Block 73
A/V Processing 75
Test Mode 81

Test Mode Access 81
Tests 81
Additional Test Mode 83
Self-Diagnostic Function (Customer Error Codes) 83

Troubleshooting 85

General Problems and Troubleshooting Guide 85

Spindle Motor 61

Kick Mode 61
CLV PB Mode 63

Tracking Servo 65

Tracking Counting in Pause or Picture Jump 65

Sled Motor Drive - PB 67

Following the Track 59

Tilt Servo 69

Operation 6 9

1

Introduction to the DTS Audio Format

Several major consumer audio formats that exist today are listed in this table:

Audio Formats

Format (note 1)

1. Stereo 1933 2 Analog linear FM, VHS, CD, LD, etc.

2. PCM (digital
version of stereo)

3. Dolby Surround

4. Dolby Prologic

5. Dolby Digital

6. DTS

7. THX







Year

Used

1982 3 Analog None VHS



1987 4 Analog None



1991 6 Digital 20 bits /

1993 6 Digital

1982 2-6 Either Theaters, DVD, LD, VHS

Chan

-nels

2 Digital 16 bits /

Class

Typical
sample

sample.

sample
20 bits /

sample

Typical Data Rate

(note 2)

705kbit/sec
(44.1kHz sample)

384 Kbytes/sec
(44.1kHz sample)
1,411kbits/sec
(44.1kHz sample)

Compression

(Approx.)

None DVD, LD

90%

75%

Test Disc Signal Source (note 3)

Prologic test CD
Dolby DVD-TEST1
Dolby DVD-TEST1

DTS Test CD
DTS Test DVD

VHS, theaters
DVD, LD, DTV

DVD, LD, CD

Note 1 - All formats require decoders, except Stereo and THX. THX is not a processing system but an audio/video quality control approval system.

Its certification stamp means that the video and audio quality at theaters and CD/DVD discs meet uniform standards. This means the same
movie viewed at one theater will not be different when viewing it at another theater.

Note 2 - Data rate = bits sampled X sample rate. A CD player (44.1kHz) rate was chosen for comparison. The DVD sample rate of 48kHz would

make its data rate higher than shown.

Note 3 - LD = Laser Discs; DVD = Digital videodiscs; DTV = Digital TV; theaters = Movie theaters; VHS = Videotape format.
Test discs can be purchased from different distributors:

Prologic test CD #SSTCD

· Sony parts distributors. Call 1-800-222-Sony for a distributor

Dolby DVD – TEST 1 # 22707 $45.

· USC Products Marketing Co.; 1 800 983 6529

DTS Test CD (digital output only)

· Digital Sound Systems Entertainment

DTS Test DVD #DTS-DVD 98061

5171 Clareton Drive, Agoura Hills, Calif. 91301
1-818-706-3525 part #DTS-CD 96091

· Sony parts distributors. Call 1-800-222-Sony for a distributor
CD part # J2501-154-A $7.76 list price

· Digital Sound Systems Entertainment

Agoura Hills, Calif. 91301
1-818-706-3525 part #DTS- DVD 98061

What is DTS?

Digital Theater Systems has developed a digital audio compression method
similar to Dolby Digital AC-3. DTS processed audio is not as compressed
as Dolby AC-3. Therefore it is said to have more surround detail (separa­tion), envelopment and better bass because of less compression (losses).

What do I need to play the DTS surround format?

The DTS source can be a DVD movie or CD. The DTS decoder is com­monly found in the receiver.

5 Speakers

CD/DVD Player 6 Channel Receiver

With DTS Decoder

Digital output preamp out to

Sub Woofer

AC-3 decoder in the Receiver:

5 Speakers

CD/DVD Player 6 Channel Receiver

With DTS Decoder
And AC-3 Decoder

Digital output preamp out to

Sub Woofer

Will a 5.1 channel DTS CD play in my CD player?

Only digital noise will appear from the L/R analog outputs if not automati­cally muted. There will be digital output from the coaxial and optical ports.
Either digital output can be fed to a DTS stand-alone decoder or a re­ceiver with a DTS internal decoder. The DTS receiver will produce the six
channels (“5.1”) or be downmixed into two (front L/R) channels depend­ing upon the user menu.

What do I need to play both the AC-3 and DTS surround formats?

The AC-3 source can be DVD or HDTV (future). The decoder can be
found in the player or receiver.

AC-3 decoder in the Player:

5 Speakers

CD/DVD Player 6 Channel Receiver
With AC-3 decoder With DTS Decoder

preamp out to

Digital Output Sub Woofer

A DTS CD compresses the six channels of audio into the space originally
occupied by the two-channel uncompressed CD audio. In order for six
compressed channels to fit on a CD, the data rate must be equal to or
less than the rate of a normal uncompressed CD.

Data rate of an uncompressed CD per channel =
16 bits/sample x 44, 100 samples/second = 706 Kbytes/sec.
There are two channels so the rate is doubled. Therefore the data rate of

a normal stereo CD = 1,412kbit/sec.
This is just about the same data rate as a DTS compressed CD. The DTS

data rate is 1,411kbits, so no analog sound will be output from a DTS CD.
For comparison, CD, DTS, and AC-3 data rates are shown:

Data Rate Comparison (44.1 kHz sample rate)

Format Output Data Rate
CD Not compressed 1,412 Kbytes/sec.
DTS Compressed 1,411 Kbytes/sec.
Dolby Digital AC-3 Compressed 384 Kbytes/sec.

2

3

Why won’t my older DVD player play DTS DVDs?

The DVD DTS flag was not established until Nov 1998. This flag must be
inserted into the DVD’s digital coax or optical output for the receiver to
recognize and decode DTS. Therefore DVD units that are not marked
“DTS ready” will not play DTS even though they have digital outputs.

Can DVD movies contain both DTS and AC-3 audio tracks?

Yes they can. Currently the DVD audio choices are:

· PCM – Producing the conventional analog L/R sound

· Dolby Digital or AC-3 – Compressed 5.1 channel surround sound

· DTS – Compressed 5.1 channel surround sound

How does DTS work?

The DTS and AC-3 encoding formats are generally similar. DTS and AC­3 can accept digital (PCM) audio with word lengths from 16 to 24 bits.
Both encoders can accept the common 32, 44.1 and 48kHz PCM sam­pling frequencies, but DTS has 12 more optional frequencies.

The general encoding of the DTS compression system will be explained.
DTS has four blocks used to compress the PCM input audio into a single
bit stream:

PCM audio Time to
6 Channels Frequency Compression

Conversion

6 lines

DTS

Multiplexer Packer Compressed

Bit Stream

Sync

MDCT Time to Frequency Conversion

Each single channel PCM source signal is grouped and allocated to one
of 32 frequency bands for analysis. The process is commonly known as
Modified Discrete Cosine Transformation (MDTC). This frequency band
allocation allows for identification and removal of redundancy among the
channels in the next compression stage.

Coefficients

6

CHANNELS

Frequency

Coefficients

Frequency

Compression

Adaptive Predictive Coding (ADPCM)

ADPCM involves smaller support stages to:

· Combine the same sounds found in other channels,

· Remove undetectable audio levels (below human hearing thresholds),

· Remove short interval noises that are swamped by louder sounds

(psycho acoustic masking); and

· Remove transient noises that do not repeat on the same or other
channels.

The support stages include transient, vector and prediction analysis stages
to determine if the sound is short term, increasing or decreasing, and if
the sound will repeat. Removal or the combination of sounds (compres­sion) is determined by the analysis.

From
time to
freq
Converter

Compression Block:
ADPCM:

• Transient analysis

• Vector analysis

• Prediction analysis

Global Bit Management

Variable Length Coding

Multiplexer

Multiplexer

The six compressed channels are combined into a single line for ease of
delivery. To do this each channel is stored into a register made up of flip­flops. A high speed Multiplexer removes the information at six times the
storage (sample) speed. Multiplexer

Six Channels
N sample

frequency

F/F type
Registers

6 lines

Packer

Global Bit Management

Once compression has taken place, an examination of the six data streams
for density is made. Bit groups are tagged and moved from a high-den­sity channel to a low-density channel equalizing the amount of data.

0011100011000011111001010101 channel 1

0000001011000000000000000000 channel 3

Variable Length Coding

Common fixed length codes and no data (00000000) codes are removed
and replaced with shorter codes using a look up table. These shorter
length code replacements are flagged for decoding.

0100011111 ROM Table 011 + flag

The packer organizes the information into blocks and adds:

· Error correction

· Synchronization information to each block and groups of blocks

4

5

BOARD LAYOUT

DVD Features

gg

DVP-S330

DVD Models

DVD Models

MSRP * 449.00$ 499.00$ 599.00$ 899.00$ 1,399.00$

General

Single Optical Assembly x x x
Dual Optical Assembly x x
Active laser platform tilt servo x x x x
TV / receiver / DVD Remote x x x x
Advanced Test Mode x x x x
Glow in the dark Remote keys x x
Glass Epoxy Circuit Boards x
Anti-Resonate Chassis & tray x
Copper Plated Shielded Chassis x

Video

10 bit Video D/A Converter x x x x
Digital RF Processor x x x x
Digital Noise Reduction x x
Video Page Bookmark x x x
2 Composite Video Outputs xxxx x
2 S-Video Outputs xxxx x
Component Video (Y, U, V) Outputs x x x x

DVP-S530D

DVP-S550D

DVP-C600

DVP-S7700

Audio

96kHz / 24 bit audio D/A Converter xxxx x
Sony Digital Cinema Sound x x
Virtual Surround Sound x
Dolby AC-3 Surround Decoder x x
DTS Decoder
2 Analog Outputs xxxx x
Coax & Optical Digital Outputs xxxx x
1/4" Headphone Output x x x x

* MSRP = Manufacturer's Su

ested List Price

6

7

Block Diagram

There are four major stages within this DVD player. They operate in this
sequence to produce the discs’ video and audio:

· Power Supply

· Communications

· Servo Control

· Video and Audio Processing

Power Supply

The power supply block delivers five different voltages. Ever 5V is the
only voltage present when the unit is plugged into AC. Ever 5V powers
Interface IC201 to switch on the remainder of the voltages when it re­ceives the power ON (P Cont) command.

Communications

Plug In

At plug in, Interface IC201 powers on the unit for 1.3 seconds, keeping
the display dark. During this time there is a brief communication between
Interface IC201 and System Control IC202 on the serial bus. At the con­clusion of this communication “handshaking”, the front panel Dolby Digital
indicator lights and quickly extinguishes as the unit powers off. The front
panel red standby light is on during the entire initial communication, never
turning green when momentarily powering up at plug in.

Power ON

At power ON, the red standby light turns to green and the power supply is
turned on. After another brief communication between IC201 and IC202,
IC202 retrieves and implements the start up program stored in Flash
Memory IC205.

The start up program requires IC202 to check for the presence of these
six ICs on the parallel bus and IC501 on the serial bus:

ICs Checked During Start Up

Name Number Purpose

1. Flash ROM IC205 Start up program instructions

2. Hybrid Gate
Array

3. SRAM IC204 IC202’s local memory

4. AV Decoder IC401 Audio (AC-3) and Video (MPEG 2)

5. ARP2 IC303 CD/DVD data processing and

6. Servo IC701 Analog servo control

7. Audio DSP IC501

If an IC does not reply, IC202 instructs IC201 to power off the set.

IC601 Expansion port for System Control

IC202 to indirectly communicate with
others on the parallel bus.

decoder

separation

Dolby Prologic, Rear channel delays,

5.1 channel downmixing to 2 channels

Servo Control

At the successful conclusion of the start up program, IC202 retrieves servo
parameter data from EEProm IC201 using the serial bus. Then IC202
communicates with expansion port HGA IC601. IC601 relays the infor­mation to other ICs connected to it. One of those ICs is IC701. Servo
IC701 is instructed to reset the base unit mechanism to the initial position
and confirm it:

· Tray closed

· Tilt servo at mid position

· Sled returned to home position

If the initial position is not confirmed before a time limit (“time out”), IC201
will power off the set. Confirmation comes from IC701 through IC601 to
IC202.

IC202 then sends commands back to servo IC701 for disc detection.

MECHANISM

OPTICAL
DEVICE

RF

TK-51 BD.

LD

SPINDLE
CONTROL
IC802

IC001
RF
AMP

FE
TE
PI

RF

S.
DATA
CLK

IC304
DRAM

IC303
ARP2

DVD

DATA

CD
DATA,
CLK

IC401
AV
DECODER

Y,C

Y,P , P

Y

SPDIF,
ACHI-6,
CLK

IC402
IC403
SDRAM

rb

VIDEO
BUFFERS

IC501
AUDIO
DSP

AU212 BD.

S VIDEO OUT

COMPONENT V OUT
COMPOSITE V OUT

DIGITAL AUDIO OUT

IC902
DAC

IC905-7
DAC

ANALOG
AUDIO
OUT

5.1 CH
AC-3
OUT

FOCUS
COIL
TRACK
COIL

TILT

SPINDLE

SLED

LOADING

IC801
FOCUS
&
TRACKING
COIL

M

M

M

M

TILT MOTOR
DRIVER

IC802
SPINDLE,
SLED, &
LOADING
MOTOR
DRIVER

3.3V EVER 5V
POWER

BLOCK

IC701
SERVO

SPINDLE
CONTROL
IC303

5V

12V

-12V

P CONT.

PARALLEL BUS

IC601
HGA

IR
REC

FR150 BD.

IC202
SYSTEM
CONTROL

BLOCK DIAGRAM

IC201
INTERFACE

MICRO

IC205
FLASH
MEM

SERIAL BUS

MB-85 BD.

IC204
SRAM

DISPLAY

PANEL
SWITCHES

IC201
EEPROM

FL101 BD.

6 22 991DVD02 1146

8

9

Video and Audio Processing

After the servos have begun, RF data will come from the optical assembly
within the base unit. The “eye pattern” RF data is split into two paths to
provide:

1. Feedback signal to lock the servos; and

2. Video and audio information.
In the A/V processing chain, the RF data is processed by the following
ICs:

Audio / Video Processing ICs

Name IC

RF Amp IC001 A/V

ARP2 IC303 A/V

Decoder IC401 A/V

DSP IC501 A

DAC IC902 A

DACs IC905-

IC907

Audio
Video

(both)

(both)

(both)

A 3 Digital to analog converters for the

or

Matrix the optical outputs to produce
signals for servo and A/V circuits

16 to 8 bit Demodulation

•

Descrambles the main data using

•

external memory IC304

Generates bit clock

•

MPEG decompression using the

•

external IC402 and IC403
memories

Crops the 16x9 image for a 4x3 TV

•

picture

Controls spindle motor speed

•

Sends disc’s control and menu

•

data to IC202

On screen display graphics

•

D/A Converter (analog video

•

output)

MPEG audio decompression

•

Dolby Digital AC-3 decompression

•

using external SRAM IC402 /
IC403

Sound enhancements when there

•

is no AC-3 received (Rear channel
delay)

Downmixing of 6 channel AC-3

•

into 2 (L/R) channels

Dolby Prologic decoding

•

Digital coax and optical output

•

Rear channel delay

•

Front/rear level balancing

•

Test tone generation

•

Digital to analog converter for the front
left and right channels

six AC-3 channels

Purpose

Video

Audio

MECHANISM

OPTICAL
DEVICE

RF

TK-51 BD.

LD

SPINDLE
CONTROL
IC802

IC001
RF
AMP

FE
TE
PI

RF

S.
DATA
CLK

IC304
DRAM

IC303
ARP2

DVD

DATA

CD
DATA,
CLK

IC401
AV
DECODER

Y,C

Y,P , P

Y

SPDIF,
ACHI-6,
CLK

IC402
IC403
SDRAM

rb

VIDEO
BUFFERS

IC501
AUDIO
DSP

AU212 BD.

S VIDEO OUT

COMPONENT V OUT
COMPOSITE V OUT

DIGITAL AUDIO OUT

IC902
DAC

IC905-7
DAC

ANALOG
AUDIO
OUT

5.1 CH
AC-3
OUT

FOCUS
COIL
TRACK
COIL

TILT

SPINDLE

SLED

LOADING

IC801
FOCUS
&
TRACKING
COIL

M

M

M

M

TILT MOTOR
DRIVER

IC802
SPINDLE,
SLED, &
LOADING
MOTOR
DRIVER

3.3V EVER 5V
POWER

BLOCK

IC701
SERVO

SPINDLE
CONTROL
IC303

5V

12V

-12V

P CONT.

PARALLEL BUS

IC601
HGA

IR
REC

FR150 BD.

IC202
SYSTEM
CONTROL

BLOCK DIAGRAM

IC201
INTERFACE

MICRO

IC205
FLASH
MEM

SERIAL BUS

MB-85 BD.

IC204
SRAM

DISPLAY

PANEL
SWITCHES

IC201
EEPROM

FL101 BD.

6 22 991DVD02 1146

10

11

Power Supply Block

The power supply is on a single board located to the left of the DVD
mechanism. This board contains both the standby and the main power
supply. The input line filter L101 and the board connectors are the only
parts that are not available.

Standby Power Supply

This power supply produces Ever 5V as long as AC is present. Ever 5V is
supplied to interface IC201 (MB85 board) and the mute transistors (AU212
board). The standby power supply consists of an oscillator and an error
regulator. The oscillator consists of switch Q121 and a control transistor
Q122. The oscillator output is applied to T102. T102’s secondary is
rectified to output Ever 5V.

Regulation

The Ever 5V voltage regulation circuit uses:

· IC202 – error detector

· PC121 – photocoupler

· Q122 – control transistor.

IC202 samples the Ever 5V output and produces a correction voltage.
Photocoupler PC121 passes the error voltage from the cold ground cir­cuit to the hot ground side circuit. The control transistor Q122 receives
the error voltage and uses it to alter the base bias of switch Q121. The
change in bias alters the off time of the oscillator signal. This changes the
oscillator frequency. The changes in frequency affect the efficiency of the
transformer, which regulates the Ever 5V.

Main Power Supply

The main power supply works similarly to the standby supply except the
main supply is switched, handles more power and has multiple secondar­ies.

The main power supply is switched ON by PCONT from the Interface IC
on the FR148 board. A high at PCONT enables switch Q101 to begin
oscillating. Transformer T101 produces several output voltages that are
rectified into DC for the remainder of the DVD unit.

When a shorted spindle motor driver IC802 loaded the unfused +12V
supply line, the main oscillator quit. The oscillator worked again when the
short was removed.

Regulation

The 3.3Vdc output is used to regulate the main power supply. Error
detector IC201 receives the 3.3Vdc and produces a correction voltage. If
the input voltage increases, the error detector output decreases. The
PC101 photocoupler passes the correction signal to the control transistor
Q102. Q102 adjusts the off time of the oscillator signal to correct the

3.3Vdc output the secondary. If the DVD power consumption is normal,
the remainder of the T101 outputs will be correct.

Power Consumption

The current along each supply line was measured in both the idle and the
DVD disc playback mode.

Model DVP-S530D Current Consumption

Part replaced

by Ammeter

Ever 5V L205 30ma (set off) 77mA (set on )
+12V partial PS201 196mA 198mA
+12V total L201 236mA 350-700m A
+5V PS202 281mA 305m A
+3.3V PS20 3 * 894mA 950mA

-12V PS204 129mA 130m A

* Use short ammeter leads or the unit will not PB the disc and the display
will not come on. The PS203 current without the display will only be
580mA.

Idle Disc PB

CurrentSupply line

Oscillator Frequencies

Power Supply Oscillator Frequencies

Power Supply Set Off Set On (stop mode)
Standby (Q121/D) 57.45kHz 49.65kHz
Main (Q101/C) 0 101.2kHz

SRV902UC BOARD

D101-104

L101
LINE
FILTER

F101

CN101

1

2

Q101,102,T101
MAIN OSC.

+12V

+5V

RV201

PC101
PHOTO
COUPLER

PC102,Q201
POWER
CONTROL

Q121,122,T102
STBY OSC.

L201

+3.3V

-12V

IC201
ERROR
DET.

EVER 5V

PC121
PHOTO
COUPLER

PS201

PS202
PS203
PS204

IC202
ERROR
DET.

L205

CN201

CN202

CN203

+12V

4

+5V

2

+3.3V

1

-12V

6

EVER 5V

7

M+12V

2

A+12V

1

+5V

5

+3.3V

6
7

PCONT

1

+5V

3

-12V

5

EVER 5V

2

TO
AU212 BD.
ANALOG AUDIO/
VIDEO

TO
MB 85 BD.
SERVO CONTROL

TO
FR148,FL101 BDS.
INTERFACE/
DISPLAY

POWER SUPPLY BLOCK

12

4 27 992DVD02 1137

13

Standby Oscillator

The standby oscillator produces Ever +5 volts when the DVD player is
plugged into 120VAC. This Ever 5V is applied to the Interface IC201 (on
the circuit board behind the front panel) and the audio and video mute
transistors (on the rear board). The standby oscillator stage consists of
two transistors and a transformer. Regulation is performed using the Ever
5V output to control the off time of the oscillator cycle.

The standby oscillator has three operational parts:

· Start

· Run

· Regulation

Start

At AC plug in, the standby oscillator stage begins when R122 and R123
bring the FET Q121 gate voltage from 0 to about 1volt. This turns on the
low power FET, allowing it to pass Drain to Source current and complete
T102’s primary circuit path to hot ground.

Run

Oscillator transistor Q121 turns ON
As current flows in T102’s upper left primary winding, a voltage is induced

in the lower secondary winding that will keep FET oscillator Q121 turned
ON. A positive voltage from the lower secondary winding takes two paths.
The first path is through R126, R125 and C121 to Q121’s gate. This
keeps Q121 conducting. The second path is through R127 and R128 to
Q122’s base. Q122’s collector is connected to the oscillator’s gate. As a
result, Q122 becomes an active resistor. Q122’s conduction prevents the
gate voltage from rising too high (protection) and later we will see that it is
used for regulation.

Oscillator transistor Q101 turns OFF
When Q101 is saturated, there is no longer a change in T102’s primary

current. The voltage induced into the lower secondary winding decays.
This reduction in bias voltage permits Q121 to turn OFF. With Q121 OFF,
the magnetic field in T102’s primary winding collapses, causing current
flow thorough C123 and limiter R130.

The collapsing magnetic field induces a negative voltage into the lower
secondary winding. The negative voltage takes two paths to reset the
oscillator. The first path is through R126, R125 and C121 to keep oscilla­tor transistor Q121 OFF. The second path is through D121 and R128 into
the base of Q122. This turns off transistor Q122 in preparation for the
next oscillator cycle.

Regulation Concept

Regulation of the Ever 5V line is accomplished by sampling the output
voltage and using it to reduce the off time of the oscillator. By reducing
the off time, the total oscillator cycle is reduced. Shortening the time it
takes to complete a cycle means its frequency is increased.

This oscillator signal is applied to transformer T102. A transformer has
an optimum frequency that will allow maximum power transfer (at reso­nance). When the applied oscillator frequency is above resonance, the
efficiency drops and its secondary voltage is reduced. By varying the
applied frequency, the output voltage can be regulated.

Regulation Circuitry

IC202 is the error regulator for this stage. Voltage divider R212, R209
and R210 reduce the Ever 5V so there is 2.5V at IC202’s input. This
allows its operation in the linear region. IC202’s output (collector) is in­versely proportional to its input. The collector output is connected to the
opto-isolator diode that passes the error signal to the hot ground oscillator
circuit.

If the Ever 5V increased, the opto-isolator transistor would conduct more,
reducing the resistance between the lower secondary winding and Q122’s
base. The reduced resistance allows more current to flow, permitting
Q122 to turn on sooner. The sooner it turns on, the sooner the FET turns
off, increasing its frequency of operation that results in a reduced output
voltage for regulation.

IMPORTANT VOLTAGES MEASURED WITH THE SET OFF:

Voltage DC Voltage
Q101/Drain 300Vp-p 166V
Q101/Gate 13.8Vp-p 2V
D121/Anode 16Vp-p 0V

D101-D104

MAIN OSC

R121

T102

C102

L101
LINE
FILTER

C108

220

Q122

R122

R123

R128
22k

C121

R125

R127

D122

PC121
ON3131

R126

R129D121
100 OHM

IC202
AN1431

Q121

R124

C123

R130

D

S

R206 470 OHMS

4.1V

R207
1k

R208

D206

D208

C212

5V

++

C210
100

R212

R209

2.5V

R210

CN203L205

CN201

+

C211
100

2

7

EVER 5V
TO FR150 BD.
(DISPLAY)

EVER 5V
TO AV212 BD.
(MUTE)

STANDBY OSCILLATOR

14

6 28 9929DVD02 1175

15

Main Oscillator

The main oscillator stage operates like the standby oscillator stage ex­cept that the main oscillator is switched ON/OFF and there are multiple
secondaries to supply the needs of the DVD player.

The main oscillator has four parts:

· Enable

· Start

· Run

· Regulation

Enable

Oscillator OFF
The operation of the main oscillator is inhibited by PC102. When the unit

is plugged into AC, Ever 5V is made by the standby oscillator stage and is
used to turn on the opto-isolator LED in PC102. The LED’s infrared light
turns on the phototransistor and it conducts.

PC102’s phototransistor is connected to oscillator transistor Q101’s start
voltage applied to the base. When PC201 conducts, the start voltage
from R102/R103 is grounded, stopping the oscillator.

Oscillator ON
Q201 removes the voltage to the opto-isolator diode in PC102, permitting

the main oscillator stage to run. When PCONT from Interface IC201 goes
high at CN203/pin 1, Q201 turns ON. Its conduction grounds the voltage
from R211, removing voltage from the LED. PC102 transistor turns off,
removing the ground from R103 so the main oscillator transistor Q101
can start.

Start

Once the PCONT control line at CN203/pin 1 goes high, PC102’s transis­tor no longer conducts. The ground is removed from the start voltage at
the junction of C111 and R104 so it rises. It will reach 6.6V, limited by the
voltage divider formed by R102, R103 and R104.

Sufficient current passes through C111 during this voltage increase to
turn ON main oscillator Q101. This is how oscillator transistor Q101 starts
conducting (turns ON) and the main oscillator starts.

Run

Q101 Turns ON
When Q101 turns ON, current flows through the main transformer’s pri-

mary winding at the upper left of T101. This induces a positive voltage to
the lower T101 winding that follows two paths. The first path is through
R106, R107, D109 and C113 to Q101’s base to keep it conducting. The
second path is through D108 and R109 to bias Q102. Q102 acts like an
active resistor at Q101’s base to keep the voltage from becoming exces­sive (protection) and is used later for regulation. Consequently the cor­rect value components and transistors are critical.

When Q101 reaches saturation, there is no longer a change in T101’s
primary current. The steady current flow no longer induces a voltage into
the lower secondary winding and the secondary voltage decays.

Q101 Turns OFF
The reduction in secondary voltage turns Q101’s OFF. The magnetic

field in T101’s primary collapses. D105, limiter, L102 and C110 short its
energy. D106 is used to discharge C110 (when Q101 is ON).

The collapsing (changing) magnetic field induces a negative voltage at
the lower secondary winding. This negative voltage from T101 passes
through R106, R107 and C113 to the base of oscillator transistor Q101. It
is used to cut off Q101 to conclude this oscillator cycle.

Regulation

The 3.3-volt output is monitored by error regulator IC201 and used to
control the conduction of phototransistor PC101. If the 3.3-volt line rises,
the phototransistor conducts harder. This reduces the resistance between
the lower secondary winding and Q102’s base, increasing Q102 base
current.

The increased base current drives Q102 harder, lowering the oscillator’s
base bias voltage and causing the oscillator to be turned OFF sooner.
When part of the oscillator waveform is shortened, its frequency increases.
This reduces T101 efficiency and the 3.3V output voltage is returned to
normal.

IMPORTANT VOLTAGES:

Q101/Collector = 336Vp-p; 150Vdc.
PC101/collector = 2.6Vdc. PC101/emitter = 0.21Vdc
Feedback secondary voltage at D108/cathode = 20Vp-p; 0.21Vdc.

AC

R102

R103

STBY
OSC

L105

D110

R107

C111

4.7mF

R104

C113

D109

EVER 5V

R211

D105

L102

Q102

C110

D106

R109

D107

PC101
ON3131

Q101

D108
MTZJ3.0

R106
47
1W

T101

4V

D201

D202

C203

D203

R201

D204

L201

C201

C202

L202

L203

RV201

3.3V ADJ.

R204

R205

R203

C205

PS201

0.5A

PS202

1A

PS203

PS204

0.75A

2.5V

CN202

R213

IC201
AN1431

2
6

7
5

1

CN201

4

2

1

6

M+12V

+3.3V

+5V
A+12V

+12V

+5V

+3.3V

-12V

TO
MB85 BD.

TO
AV212 BD.

PC102
ON3131

Q201

MAIN OSCILLATOR

16

P CONT

CN203

FROM

1

FR150 BD.

7 12 9930DVD02 1174

17

Power Control

Plug In

When the DVD player is plugged into AC, the power supply only outputs
Ever 5V to:

· Analog audio mute transistors – AU-212 board

· Interface IC201/pin 16 – FL101 board

· Reset IC202/pin 5 - FL101 board

The mute transistors are biased ON to keep the 5.1, headphones and L/
R channel audio outputs grounded.

Ever 5V applied to Interface IC201 starts the 4MHz X201 crystal con­nected to pins 14 and 15.

Reset IC202 on the FL101 board uses C211 to hold its pin 4 momentarily
low when Ever 5V is first applied. This resets Interface IC201/pin 18.

After reset, a brief communication occurs between IC201 and IC202. A
momentary light of the front panel blue Dolby Digital LED (D203) marks
the end of the plug in communications and the unit shuts down.

The plug in sequence is listed below:

1. AC plug in

2. Ever 5V is applied to Interface IC201/pin 16

3. X201 becomes active and stays active

4. Red power off/standby LED comes ON.

5. PCONT from Interface IC201/pin 24 goes high to power the set

6. Ready pulse is output IC201/pin 78 as an interrupt line to IC202 to
begin communications. It is difficult to see this low going interrupt
pulse on a a scope, but it will light a scope’s “triggered” LED.

7. IC601 transfers this “ready” (interrupt) information to System Control
IC202 by using another interrupt signal from IC601/pin 155 (low go­ing). The low forces IC202 to generate a chip select (CS1 or CS4) so
the data can be transferred to IC202 on the parallel bus.

8. System Control IC202 sends chip select (difficult to see the low going
pulse from pin 97), bit clock (low pulses from pin 78) and serial data
(high pulses from pin 77) to Interface IC201.

9. IC201 acknowledges by lighting the Digital Dolby LED D203

10. Interface IC201 brings PCONT low, removing power to the set.
Unit is now in standby and ready to be powered ON.

IC201 – IC202 Communications Waveforms

The following sets of waveforms show this communication between IC201
and IC202. Notice that the Dolby Digital LED is turned ON only at the
conclusion of the plug in communications. The LED does not light when
there are incomplete communications.

PM3394, FLUKE & PHILIPS

ch1

ch2

ch3

ch4

Plug in Communications – between IC201 / IC202

Channel 1 PCONT CN203/pin 1 5Vp-p
Channel 2 Dolby Digital LED D203/anode 2Vp-p
Channel 3 CS from IC202 CN006/pin 3 5Vp-p
Channel 4 Data from IC201 CN006/pin 4 5Vp-p
Time base 200msec/div.

The following second set of waveforms is taken of IC202 CS signal (ch 3)
that is replying to IC201. Notice that the return clock (ch 3) and data (ch

4) from IC202 occur before IC201 turns the LED (ch 2) ON.

T
1

2

3

CH1!5.00 V=
4

CH2!2.00 V=

CH3!5.00 V=

CH4!5.00 V= CHP MTB 200ms- 0.40dv ch1+

Name Location Voltage/div

EVER 5V

IC051
IR
RECEIVER

3

EVER 5V

FR150

5

CN201/

CN002

R274

2

1

GRN

R072

R071

RED

S071
POWER

12

4

6

7

EVER
5V

3

12

P CONT.

16

9

31

32

R221

R222

FRONT PANEL
BUTTONS
S212-S218

SRV902UC PWR BLK

IC202
RESET

PST9140

5

4

C211

18

IC201
INTERFACE
CONTROL
M38857
MCH­E206FP

2415145

X201
4MHz

3

SBUSY1

3.3V

D203
DOLBY
DIGITAL

R285

30

SIN

SCLK

S OUT

SRDY1

DISPLAY

FL101 BD.

5V

CN202
CN001/

72

70

76

71

78

CN202/
CN006

5

6

3

4

2

6
2
5

3

6

11

R044

R036

5V

14

IC203
BUFFER
SN74
HCT08

R037

3.3V
5V

1

4

12

R045

PARALLEL
BUS

22

3.3V

40

20

77

78

97

76

1

SO01

SC0

CSOL

SI0

XIF
INT

MB85 BD.

IC202
SYSTEM
CONTROL
MB91101
PFV

CS4

CS4

4
43
69

70

93

11

CS1

107

141142

CS1

IC601
HGA
CXD8788Q

3.3V

CE

26

IC205
FLASH
ROM
MBM29
LV160

PARALLEL
BUS

4737

POWER CONTROL

18

6 22 9913DVD02 1154

PM3394, FLUKE & PHILIPS

ch1

ch2

ch3

ch4

T
1

2

3

CH1!5.00 V=
4

CH2!2.00 V=

CH3!5.00 V=

CH4!5.00 V= CHP MTB 200ms- 0.40dv ch1+

Plug in Communications – between IC201 / IC202

Name Location Voltage/div
Channel 1 PCONT CN203/pin 1 5Vp-p
Channel 2 Dolby Digital LED D203/anode 2Vp-p
Channel 3 Bit clock from IC202 CN006/pin 6 5Vp-p
Channel 4 Data from IC202 CN006/pin 5 5Vp-p
Time base 200msec/div.

Power ON

IC201
The power ON operation works much like a modern day computer. When

the power ON command is received, Interface IC201 begins a boot up
sequence using IC202 and IC205 to finish it. IC201 causes:

· The red standby light to turn to green;

· PCONT (at IC201/pin 24) to go high, powering the set; and

· Communications with System Control IC202, continuing the power

ON operation

IC202
IC202 continues the power ON operation, retrieving start up information

from the Flash ROM IC205. This start up information instructs IC202 to
check each IC on the parallel bus and wait for an acknowledgement sig­nal. At power ON, these ICs are polled in the order shown in the table:

19

Power ON IC check sequence (not shown in the diagram)

Chip Select Source Destination IC

1. CS 1 - IC202/pin 10 SRAM IC204 / HGA IC601

2. CE – IC202/pin 11 Flash ROM IC205

3. CS 3 – IC202/pin 8 AV Decoder IC401

4. CS 4 – IC202/pin 7 HGA IC601

5. CS 2 – IC202/pin 9 AV Decoder IC401

6. XCS – IC601/pin 111 ARP2 IC303

7. HCS - IC601/pin 118 Servo IC701

When all the replies have been received, Interface IC201 is informed and
IC201 keeps the unit powered ON (PCONT remains high). At the same
time, IC201 turns on the front panel blue Dolby Digital LED.

If a communications failure occurs and there is no acknowledgement sig­nal to IC202 within three seconds of power ON, the unit will turn off. The
PCONT signal (from IC201/pin 24) will go low and the player power is
removed. The green power ON light changes back to red (standby mode).

Post Power ON Check

Therefore, if the blue Dolby Digital LED lights, communications have taken
place and the unit remains ON. The next step is to determine if there is a
disc present. The disc check sequence is:

1. Tray up and chucked – chuck switch feedback

2. Sled moves to home position – photosensor feedback

3. Sled moves outward – no feedback (stepping motor)

4. Laser is turned ON momentarily while focus searching

5. Focus Search is performed – FE and PI feedback signal

6. Sled moves outward further – no feedback

7. Laser is turned ON and Search is performed again

8. Sled moves outward further – no feedback

9. Laser is turned ON and Search is performed a third time

10. Sled moves inward to home – photosensor feedback

11. Laser is turned ON and Search is performed a fourth time

12. Spindle motor rotates – FG amp kick drive feedback

13. Display reads NO DISC.
If an IC fails to receive the correct feedback from its sensors, System
Control will instruct IC201 to enter standby (red front panel light).

EVER 5V

IC051
IR
RECEIVER

3

EVER 5V

FR150

5

CN201/

CN002

R274

2

1

GRN

R072

R071

RED

S071
POWER

12

4

6

7

EVER
5V

3

12

P CONT.

16

9

31

32

R221

R222

FRONT PANEL
BUTTONS
S212-S218

SRV902UC PWR BLK

IC202
RESET

PST9140

5

4

C211

18

IC201
INTERFACE
CONTROL
M38857
MCH­E206FP

2415145

X201
4MHz

3

SBUSY1

3.3V

D203
DOLBY
DIGITAL

R285

30

SIN

SCLK

S OUT

SRDY1

DISPLAY

FL101 BD.

5V

CN202
CN001/

72

70

76

71

78

CN202/
CN006

5

6

3

4

2

6
2
5

3

6

11

R044

R036

5V

14

IC203
BUFFER
SN74
HCT08

R037

3.3V
5V

1

4

12

R045

PARALLEL
BUS

22

3.3V

40

20

77

78

97

76

1

SO01

SC0

CSOL

SI0

XIF
INT

MB85 BD.

IC202
SYSTEM
CONTROL
MB91101
PFV

CS4

CS4

4
43
69

70

93

11

CS1

107

141142

CS1

IC601
HGA
CXD8788Q

3.3V

CE

26

IC205
FLASH
ROM
MBM29
LV160

PARALLEL
BUS

4737

POWER CONTROL

20

6 22 9913DVD02 1154

21

Communications Block

Both serial and parallel bus structures are used in the same unit of today’s
DVD players. The serial data bus is a simple way to provide communica­tions between ICs. On one line, data is transmitted one bit after another
to the next IC in 8, 16, 20, 24 or 32 bit groups. On another line, corre­sponding clock pulses accompany the bits of data. One clock pulse iden­tifies each bit of data - this is why this line is also called a bit clock. There­fore, it takes 8, 16, 20, 24 or 32 clock pulses to receive a group of data in
a serial bus.

A parallel data bus is used when large amounts of data need to be trans­mitted in a shorter time frame. In the parallel bus, multiple data lines are
used along with a clock line. When a single clock pulse is sent, the 8, 16,
20, 24 or 32 lines each simultaneously transmit a bit of data to the receiv­ing IC. (Only 16 data lines are used here.) Therefore, it takes only one
clock pulse to receive a group of data in a parallel bus.

The parallel bus is used in processing video information (IC401) and in
the disc playback servo (IC701) where large amounts of data must be
handled quickly.

Serial Data

Parallel Data

The parallel data bus is much more complicated than the serial bus. It
consists of address lines, data lines and a clock line. Just before data is
transmitted from one IC to another, a location is designated using ad­dress lines. Then clock pulses are sent from the master IC202 to transfer
the data into the receiving IC.

When communications are bi-directional on the parallel bus, an additional
line identified as write enable (WE) and/or read enable (RE) is used. These
lines determine the direction of the data to or from the master IC. When
there is no WE or RE line, the bi-directional data communication is pre­established first as read-data from the master micro. Write-data occurs
afterwards.

The serial data bus connects several ICs and consists of two or three
lines. Serial data is transmitted from one IC to another on a unidirectional
line (arrows shown in one direction). This data is accompanied by a clock
signal for a total of two lines in a unidirectional serial communication.

The interface control IC201 and System Control IC202 communicate
bidirectionally (arrows shown in two directions). Three lines are neces­sary when bi-directional transmissions are called. There is a data line for
each direction. The additional clock signal makes a total of three lines for
a bi-directional serial bus. The clock signal usually comes from the con­trolling micro, which in this case is System Control IC202.

System Control IC202 communications with Interface IC201, EEProm
IC201 and DSP IC501 are bi-directional. System Control communica­tions to the Digital to Analog Converters (DAC) IC902, IC905-7 are unidi­rectional.

CS FROM
IC601

CS FROM
IC202 IC202

CS FROM
IC202

CS FROM

CS FROM
IC601

CHIP
SELECTS

IC201
INTERFACE
CONTROL

CS

IC202
SYSTEM
CONTROL

CS FROM
IC202

SERIAL BUS

IC201
4k
EEPROM

CS FROM
IC202

IC205
FLASH

IC501
AUDIO
DSP

CS FROM
IC202

PARALLEL BUS

IC401
AV
DECODE

IC204
SRAM

CS FROM
IC202

IC303
ARP2

IC902
AUDIO
2 CH
DAC

IC601
HGA

CHIP
SELECTS

CS FROM
IC601

IC905
DAC
FRONT

CS FROM
IC601

IC701
SERVO

IC906-7
DAC
REAR,
CENTER

COMMUNICATIONS BLOCK

22

6 23 996DVD02 1149

23

Serial Data Communications

A close examination of the serial bus structure shows there are two serial
buses. Both are active as long as the set is ON.

Serial Bus 0
Serial Bus 1

Serial Bus 0

Bus 0 is used for bi-directional communications between:

· System Control IC202

· Interface IC201

· EEProm IC201

System Control IC202 is the master IC. It sends and receives data on the
serial data in (SI0, at IC202/pin 76) and out (SO0, at IC202/pin 77) lines.
The data is always accompanied by serial clock (SC0, at IC202/pin 78)
from IC202. There are always communications between these two ICs
as long as there is power applied.

Interface IC201

System Control IC202 has the continuous task of transferring display in­formation to the Interface IC201. The Interface IC201 must inform Sys­tem Control IC202 that there is a new command such as play or stop.

Communications begin when Interface IC201/pin 78 outputs a low going
“ready” pulse. In this IC the ready command is more like an interrupt
command. This low going pulse is received by IC601/pin 22, which is
used as an expansion port to access System Control IC201 via the paral­lel bus. The interrupt input is periodically checked within IC202’s program.
When found, IC202 will enter a subroutine and acknowledge IC201’s re­quest to send data for processing.

IC202/pins 76 and 77 to occur. The entire operation is similar to some­one working when interrupted by a doorbell. When he is ready, he will
answer the door. Afterwards he returns to his work in the house or else­where. The IC201 to IC202 communications sequence is:

System Control IC202 and Interface IC201 Data Transfer Sequence

Name of Signal Signal Source Signal purpose

1. SRDY (ready) IC201pin 78 Request communications

2. CSOL (chip
select)

3. SC0 (clock) IC202/pin 78 Serial clock for data

4. SI0 (data) IC201/pin 71 User commands

5. SO0 (data) IC202/pin 77 Display update

6. CSOL (chip
select)

IC202/pin 97 Communications window (active

low)

IC202/pin 97

Communications ends (returns
high)

EEProm IC201

During playback or when playback is started, System Control IC202 re­trieves information held in EEProm IC201. IC201 holds servo data and
stores some disc parameters, such as how many information layers are on
the disc. Some of this data is visible in the test mode.

Bi-directional communications between System Control IC202 and EEProm
IC201 is accomplished using:

· Two single direction serial data lines (SO0 and SI0)

· Clock pulses from IC202/pin 78

· Chip Select signal from IC601/pin 23

Periodically in IC202’s routine, EEProm IC201is chip selected (when pin 3
is brought low). When this occurs, data is transferred between the ICs on
the data lines (SO0 and SI0).

System Control IC202 acknowledges the interrupt signal by outputting
two signals: a low chip select signal from pin 97 and a clock signal from
pin 78. This allows for data communications on the SI0 and SO0 lines at

FL101 BD. MB85 BD.

DISPLAY

CN202/

CN006

SC1

7678

72
71
70

5
4

6

3

2

SIN 1

S OUT 1

IC201
INTERFACE
CONTROL
M38857MCH

S BUSY

SRDY

SO0

SI0

SC0

XFMCS

XIF BUSY

IC201
4k
EEPROM
AK6440AF

SO0SI0

IC202
SYSTEM CONTROL
MB91101PFV

CSOL

97

3

CS

SI0SO0SC0

SC0

CSO

262761

141

142

XIFINT

28

IC905
FRONT
L/R DAC
CXD8799N

SC1

IC601
HGA
CXD8788Q

XDACS3

XDACS2

OICS

XECS

22

97
96

28
23

CS2

SO1

28

2627

IC906

SC1

27

26

27

26

REAR
L/R DAC
CXD8799N

SO1

IC907

SC1

CENTER
WOOFER DAC
CXD8799N

SO1

CS2

CS3

28

28

62

IC501
AUDIO
DSP
CDX1901R

SC1

654

66

79

SI1

CS

SI1

63

SERIAL BUS 1

89

80787776

SC1

SO1

PB3

PB2

10

7

99

98

IC902
AUDIO
2 CH DAC
CXD8799N

SC1 SO1SO1

CS1

CS4

PARALLEL
BUS

SERIAL DATA COMMUNICATIONS

24

6 23 994DVD02.DWG 1144

25

Serial Bus 1

Bus 1 is used for communications between:

· System Control IC202

· Audio DSP IC501

· Audio 2 channel IC902

· Front, Rear, and Center D/A converters IC905 to IC907

System Control IC202 is the master IC. It sends and receives data on the
serial data in (SI1, at IC202/pin 79) and out (SO1, at IC202/pin 80) lines.
The data is always accompanied by serial clock (SC1, at IC202/pin 89)
from IC202. There are always communications present at IC202/pins
79,80 and 89 as long as there is power applied just like in serial bus 0.

Audio DSP IC501

Bi-directional communications between System Control IC202 and IC501
is similar to that with EEProm IC201. Communications between System
Control IC202 and Audio DSP IC501 are accomplished using:

· Two serial data lines (SO1 and SI1)

· Clock from IC202/pin 89

· Chip Select from IC601/pin 28

Periodically in IC202’s routine, Audio DSP IC501 is chip selected. When
the chip select pin 62 line is brought low, data is transferred between the
ICs on the data lines (SO1 and SI1).

IC Function

IC Name Number Function
System Control IC202 Main Micro
Interface IC201-FL101

Bd
EEProm IC201-MB85 Bd Stores serv o info
Audio DSP IC501

Audio 2 channel D/A
Converter

Front, Rear, Center,
D/A Converter

IC902 D/A Converter for analog

IC905 - IC907 D/A Converter for 5.1 AC-3

Accepts user commands
(play, open tray, next, etc)

Delays (echoes) for speaker
effects

audio

signal.

Audio 2 Channel D/A Converter IC902
Audio Front, Rear, and Center D/A Converters IC905 - IC907

System Control IC202 communicates with the remainder of the ICs on
the serial bus 1 lines in a unidirectional manner. Each one of these D/A
Converters has an individual chip select line from IC601. The SO1 data
line from IC202/pin 80 is common to the D/A Converters. Data applies
only to the D/A Converter when its chip line is low. The data as always is
accompanied by bit clock from IC202/pin 89.

FL101 BD. MB85 BD.

DISPLAY

CN202/

CN006

SC1

7678

72
71
70

5
4

6

3

2

SIN 1

S OUT 1

IC201
INTERFACE
CONTROL
M38857MCH

S BUSY

SRDY

SO0

SI0

SC0

XFMCS

XIF BUSY

IC201
4k
EEPROM
AK6440AF

SO0SI0

IC202
SYSTEM CONTROL
MB91101PFV

CSOL

97

3

CS

SI0SO0SC0

SC0

CSO

262761

141

142

XIFINT

28

IC905
FRONT
L/R DAC
CXD8799N

SC1

IC601
HGA
CXD8788Q

XDACS3

XDACS2

OICS

XECS

22

97
96

28
23

CS2

SO1

28

2627

IC906

SC1

27

26

27

26

REAR
L/R DAC
CXD8799N

SO1

IC907

SC1

CENTER
WOOFER DAC
CXD8799N

SO1

CS2

CS3

28

28

62

IC501
AUDIO
DSP
CDX1901R

SC1

654

66

79

SI1

CS

SI1

63

SERIAL BUS 1

89

80787776

SC1

SO1

PB3

PB2

10

7

99

98

IC902
AUDIO
2 CH DAC
CXD8799N

SC1 SO1SO1

CS1

CS4

PARALLEL
BUS

SERIAL DATA COMMUNICATIONS

26

6 23 994DVD02.DWG 1144

27

Parallel Data Communications

There are six ICs that communicate with System Control IC202 on the
parallel bus:

ICs on the Parallel Bus

Name Number Purpose

1. Flash ROM IC205 Start up program instructions

2. Hybrid Gate
Array

3. SRAM IC204 IC202’s local memory

4. AV Decoder IC401

5. ARP2 IC303 CD/DVD data processing & separation

6. Servo DSP IC701 Analog servo control

Bi-directional communications between these ICs are accomplished us­ing the following lines; however, not all ICs use the last three lines:

· Chip Select from IC202

· Address from IC202

· Data (bi-directional)

· Clock from IC202

· Interrupt from destination IC

· Read/Write from IC202

Chip Select Line

System Control IC202 systematically polls each IC on the communica­tions bus with a chip select signal. This low or high going pulse identifies
the individual destination IC that System Control wants to communicate
with. The chip select output sequence is listed below:

IC601 Expansion port for System Control

IC202

Audio (AC-3) and Video (MPEG 2)
decoder

Chip Select Signals from IC202 (active low)

CS Source Destinatio n

Pulse

Width/Polarity

1. CS 1 - IC202/pin 10 SRAM IC204 /
HGA IC601

0.56us /–

0.9usec/-

2. CE – IC202/pin 11 Flash ROM IC205 0.56us /–

3. CS 2 – IC202/pin 9 AV Decoder IC401

0.7 & .26
usec/-

4. CS 4 – IC202/pin 7 HGA IC601 0.3usec/-

5. CS 3 – IC202/pin 8 AV Decoder IC401 1.2usec/-

6. XCS – IC601/pin 111 ARP2 IC303 0.3usec/-

7. HCS - IC601/pin 118 Servo IC701 0.3usec/-

Chip Select Waveforms
The following waveforms show the chip select signals going to the S RAM

IC204 (ch 1) and AV Decoder IC401 (ch 2 and 3). They can be compared
to the D1 data (ch 4) to show that the chip select (ch 1-3) signals occupy
more than one bit clock interval. Note that on each of the CS 1 (ch 1) and
CS 2 (ch 2) lines, two different pulse widths are used. These waveforms
were taken with the unit on without a disc being played.

ch1

ch2

ch3

ch4

Chip Select signals from IC202 (active low)

Channel 1 CS = CS1 IC202/pin 10 5Vp-p
Channel 2 CS = CS2 IC202/pin 9 5Vp-p
Channel 3 CS = CS3 IC202/pin 8 5Vp-p
Channel 4 Data = D1 IC202/pin 26 2Vp-p
Time base 5usec/div.

PM3394, FLUKE & PHILIPS

1

T
2

3

CH1!5.00 V=

CH2!5.00 V=

CH3!5.00 V=
4

CH4!2.00 V= ALT MTB5.00us- 1.34dv ch2-

Name Location Voltage/div

INTERRUPT

196

198

WAIT/INTERRUPT
IC601/72

95

IC202
SYSTEM
CONTROL
MB91101PFV

SI
SO
SC

SERIAL BUS
TO IC201

IC501
IC902
IC905-7

107

26

1198
CECS2CS3

CS1CS4

6

XCS1

IC202

IC205
16M FLASH
MBM29LV160B

CE

AO-21
DO-15

IC204
1M SRAM
IDT71VD16S20

CS

INTERRUPTS

INTERRUPTS

IC601/PIN

PIN 157PIN 19
PIN 155PIN 88
PIN 156PIN 97

XCS3

99

SDCS

XCS2

98

A1-20

DO-15

ADDRESS & DATA PARALLEL BUS

A1-16
DO-15

IC601
HGA
CXD8788Q

CS1

141
142

CS4

OON

IC401
AV DECODER
CXD1930Q

SDCS1ON

120

AO-21
DO-15

AO-5
A17-19
D8-15

118

115

107

111

IC402
16M SRAM
KM416S1020

121

3

ARP INTERRUPT

18

CS

18

IC403
16M SRAM
KM416S1020

A0-1
DO-7

HCS

IC701
SERVO DSP
CXDP791Q

128

INTERRUPT

CS

ADDRESS, WE, CAS,
RAS, DATA

AO-7
D8-15

83

84

XCS

OE

XOE

IC304 16M DRAM
KM416V1200

WE

17

DATA

148

XMWR

MB85 BD.

ADDRESS

IC303
ARP2
CXD8784R

RAS

35341833

150151152

CAS

PARALLEL DATA COMMUNICATION

28

6 29 995DVD02 1146

29

Address Lines

Direct Addressing
The parallel bus in this unit contains multiple address lines to designate

the destination of the data within the IC that is chip selected. These ad­dress lines are labeled A0-21 from master IC202. Address lines are shared
by some destination ICs and none use all 22 address lines.

Column and Row Addressing
IC401 and IC303 control three memory ICs. A memory IC has more data

locations than can be accessed by one set of address lines directly. CAS
and RAS lines are used to expand that number. Memory locations can be
addressed like cells in a multiplication table. For example, when CAS is
active, the address lines identify a column of memory locations. Then
when RAS is active, the address lines now pin point the memory cell by
identifying the row it is in.

Data and Clock Lines

Serial data communications involve the fewest number of connections
between ICs. When speed is important, the parallel data structure is
used. Instead of having a single data line between the communicating
ICs, there are 8 or 16 lines that carry data. As in the serial bus structure,
on a separate line the parallel bus uses a bit clock signal. When a single
bit clock pulse occurs, the entire group of 8 or 16 bits of data is transferred
at once. Therefore, the data transfer rate of the parallel bus system is
much faster than the serial bus.

Interrupt Lines

Interrupt signals are used when the destination IC has carried out the
instruction given to it and wants to reply with resultant data (such as task
completed or information such as AC-3 detected). A destination IC can
not generate a clock or chip select lines to send data to the master IC202.
The destination IC must send an interrupt signal to the master IC202
requesting attention. When the master IC202 is ready, it will send chip
select and clock signals, allowing the destination IC to send data.

Read / Write Lines

Bi-directional communications on the parallel bus may use a single write
enable (WE) / read enable (RE) line from the master IC202. During the
chip select interval, this line determines the direction of the data to or from
the master IC202. A high is one data direction while a low is the other. In
some systems, two individual read and write lines are used.

When there are no interrupt, WE or RE lines, communications are pre­established to share the time to read and write during the chip select
interval.

Communications from IC202 to Other ICs

IC202 can only send data to another IC after it chip selects the IC and
supplies internal address and bit clock to carry the data. Consequently, a
list of communications from IC202 would consist of the following:

· Chip Select (usually active low)

· Write control line (usually active low)

· Address data (Identifies the registers/memory location in the destina-

tion IC to put the data)

· Bit clock

· Data

Communications from Another IC to IC202

If another IC has finished a task and wants to reply with sensor informa­tion, it must request the service (signals) above to return data. Once the
destination IC sends an interrupt pulse, IC202 will reply with all the sig­nals listed above so the other IC can send data to IC202.

The Read control line (from IC202) is active instead of the write line in the
date reply to IC202. All or some of the address locations are checked by
IC202. The number is dependent upon the firmware built into Syscon
IC202. For example, IC202 may request the Servo IC701 perform a sled
movement to home task. Later IC202 receives an interrupt from IC701.
Instead of checking all of IC701’s address locations, it will just access the
one that contains the sled at home data.

INTERRUPT

196

198

WAIT/INTERRUPT
IC601/72

95

IC202
SYSTEM
CONTROL
MB91101PFV

SI
SO
SC

SERIAL BUS
TO IC201

IC501
IC902
IC905-7

107

26

1198
CECS2CS3

CS1CS4

6

XCS1

IC202

IC205
16M FLASH
MBM29LV160B

CE

AO-21
DO-15

IC204
1M SRAM
IDT71VD16S20

CS

INTERRUPTS

INTERRUPTS

IC601/PIN

PIN 157PIN 19
PIN 155PIN 88
PIN 156PIN 97

XCS3

99

SDCS

XCS2

98

A1-20

DO-15

ADDRESS & DATA PARALLEL BUS

A1-16
DO-15

IC601
HGA
CXD8788Q

CS1

141
142

CS4

OON

IC401
AV DECODER
CXD1930Q

SDCS1ON

120

AO-21
DO-15

AO-5
A17-19
D8-15

118

115

107

111

IC402
16M SRAM
KM416S1020

121

3

ARP INTERRUPT

18

CS

18

IC403
16M SRAM
KM416S1020

A0-1
DO-7

HCS

IC701
SERVO DSP
CXDP791Q

128

INTERRUPT

CS

ADDRESS, WE, CAS,
RAS, DATA

AO-7
D8-15

83

84

XCS

OE

XOE

IC304 16M DRAM
KM416V1200

WE

17

DATA

148

XMWR

MB85 BD.

ADDRESS

IC303
ARP2
CXD8784R

RAS

35341833

150151152

CAS

PARALLEL DATA COMMUNICATION

30

6 29 995DVD02 1146

Mechanism

Disc Tray and Laser Platform Position

Tray Movement
The loading motor moves the disc tray in or out. Without the tray, the

loading motor’s shaft is seen on the right side.

31

Pawl
Channel

Teeth

Tray
Bottom

Loading Motor

Top View
The rotation of the motor turns the three gears to its left. The final gear at

the far-left mates with the teeth on the tray. Motor direction determines
tray movement. Electrical feedback to stop the motor is an opened/closed
electrical switch under the white activator arm. The tray at the end posi­tion pushes the arm.

Platform Position
When the loading motor drives the tray inward, a channel in the tray moves

a spring-loaded pawl into the middle rotating gear. The gear’s rotation
continues to slide this pawl to the left. The front part of this pawl that
faces the laser assembly platform lifts a pin connected to the platform. As
the pawl slides left, the platform is lifted up. The pawl in the tray’s channel
prevents the tray from sliding out.

No Power Tray Removal – From the Bottom

A spring-loaded pawl under the tray locks the tray closed. The bottom
part of this pawl can be accessed from under the mechanism assembly.

Tab underneath

Mechanism

Bottom T ab

1. Unplug AC power and press the power button to discharge the power
supply capacitors.

2. At the mechanism top, remove the two screws and the mechanism’s
top cover. The cover acts as a tray stop. Cover removal allows the
tray to be pulled out later.

3. At the rear of the mechanism remove the rear black screw for finger
clearance.

4. Place your finger under the mechanism. Push the slider’s bottom tab.

5. At the bottom of the assembly, slide the tab toward the center of the
mechanism. This lowers the laser (unchucks), freeing the tray.

6. From the top of the mechanism, slide the tray out

No Power Tray Removal – From the Top

1. Remove the two screws and the mechanism’s top cover to expose
the tray and laser platform.

2. Locate the top pawl under the tray by inserting a small screwdriver
between the platform and tray. The pawl is just in front of the spindle
motor.

3. Slide the pawl to the right to lower the platform and free the tray.

4. Remove the tray.

Tilt Motor

Purpose

Incline Gear

The stepping motor then increments the incline gear to the middle posi­tion. This position is stored in EEProm IC201 and updated during the test
mode automatic adjustments. During DVD playback, if the RF level fluc­tuates, the tilt motor rotates until the RF level stabilizes. The incline gear
remains at the middle position during CD playback.

Sled Position

The sled motor moves the laser assembly away from home position at
the spindle motor. The laser assembly‘s home position is marked as it
blocks the light to a photo detector sensor. This picture shows the photo­sensor location under the sled motor shaft.

Maximum RF output level occurs when the laser beam is perpendicular to
the disc’s information layer. The tilt motor raises one end of the laser
platform so its beam is perpendicular to the disc.

Access and Operation
The tilt motor is a stepping motor located next to the incline gear. At

power OFF, the incline gear lowers one end of the laser platform. At
power ON, the incline gear raises the platform to full height.

Sled Sensor

32

33

Focus Coil

Voltage applied to the focus coil that is connected to the lens opposes a
stationary vertical magnet. The force generated moves the objective lens
up or down to focus the laser spot on the information layer of the disc.

F Coil

LensMagnet

Protection Spot

Laser

A ribbon cable connects the laser assembly to its circuit board. A circuit
board connector clamps the assembly’s ribbon cable. Free the cable
from the connector by pulling the connector tabs on both sides 1mm to­ward the cable. The connector will slide out..

In this picture the left side of the cable is free from the connector.

Left connector
unlocked

In a replacement laser assembly, a spot of solder is placed on the foils of
the ribbon cable (see the focus coil picture) to protect the laser diode from
static damage that will shorten its life. Remove the solder spot AFTER
connecting the laser assembly cable to the circuit board.

Ribbon Cable

Power ON Mechanical Sequence – No Disc

,

q

y

,

Operation Purpose

1. Power On button is pressed. IC202 retrieves start up program from Flash ROM IC205. After the
ICs are checked for basic communications
IC701 to start the mechanical se
stored in EEProm IC201.

uence. The servo parameters are

IC202 instructs Servo

2. Disc tray is closed (if open) and placed into a

chucked position.

3. Sled moves the optical assembly to home position. Sled starting point.

4. Tilt Motor resets laser platform to mid position. Presets the laser beam perpendicular to the disc for max RF.

5. Sled moves outward quickly, then slows down. Optical assembly is moving under the disc’s information area.

6. Laser is turned ON momentarily during focus

search.

7. Focus search one time.

8. Sled increases speed moving further outward. Sled slows down in a second attempt to locate a disc.

9. Sled slows down

10. Laser is turned ON momentarily during focus

search.

11. Focus search. Looks for the disc’s information laye.

12. Sled again moves quickly outward then slows

followed by laser and focus search.

13. Sled moves inward to home and stops. Disc check at home position.

14. Laser is turned ON momentarily. Final attempt to identify a disc.

15. Focus search.

Clamps a disc on the spindle motor platform.

Looks for a disc. Reflected light identifies a disc.

Optical assembl
information layer.

Looks for a disc using reflected light.

Third attempt to locate a disc.

lens moves up then down, looking for the disc’s

16. Spindle motor rotates. (laser is off)

17. Display reads NO DISC User feedback

34

35

,

q

Power ON Mechanical Sequence – DVD Disc

Operation Purpose

1. Power On button is pressed. IC202 r etr ieves start up program from Flash ROM IC205. After t he

ICs are checked for basic communications
IC701 to start the mechanical se
stored in EEProm IC201.

uence. The servo parameters are

IC202 instructs Servo

2. Disc tray is closed (if open) and placed into a

chucked position.

3. Sled moves the optical assembly to home position. Sled starting point.

4. Tilt Motor resets laser platform to mid position. Presets the laser beam perpendicular to the disc for max RF.

5. Sled moves outward quickly then slows down. Optical assembly is moving under the disc’s information area.

6. Laser is turned ON momentarily during focus search. Looks for a disc. Reflected light identifies a disc.

7. Focus search one time. Optical assembly lens moves up then down, counting the number of

8. Sled stops moving when a disc Is identified.

9. Spindle motor rotates. Rotates the disc.

10. Laser is turned ON a second time. To begin playback.

11. Focus search. Focuses on the first information layer on the disc.

12. Focus servo is turned ON. Maintains focus on the layer.

13. Tracking begins. Keeps the laser beam at the information track’s center.

14. Tilt motor servo starts. Maintains high RF level.

15. Disc PB begins. Display shows elapsed time. Playback verification.

Clamps a disc on the spindle motor platform.

disc layers.

NOTES

36

37

Tray Motor Drive

The opening and closing of the disc tray involves two micro controllers,
one gate array IC and a driver IC that powers the loading motor. The
loading motor is powered by pressing the front panel open/close tray but­ton S212. The following occurs when the tray button is pressed:

1. Interface Controller IC201 recognizes the tray button

2. IC201 turns on the display to show the command entered

3. IC201 communicates with System Control IC202

4. IC202 instructs Hybrid gate array IC601 to issue a drive command

5. Driver IC802 translates the command into loading motor current

6. The tray position switch returns information to IC201 (via IC601)
The tray position switch information is sent to Interface IC201 via IC202 to
complete the tray open cycle. The “OPEN” display disappears when the
cycle is complete. This also sets the latch, permitting the tray to be closed
the next time the tray button is pressed.

Interface Controller IC201 Recognizes the Tray Button

Pressing the tray button S212 reduces the voltage at IC201/pin 5 from
+5V to +0.65V.

IC201 Turns On the Display

Once the command is recognized by Interface Control IC201, the ND201
fluorescent display digits and segments lines are multiplexed with a LOW
to illuminate the word OPEN.

IC201 Communicates with System Control IC202

2. IC601 sends this information along the parallel bus to IC202. This
occurs when IC601/pin 142 is periodically (chip) selected using CS1
or CS4 to send and receive data. Two chip select lines are used in
different parts of the Hybrid Gate Array IC601.

3. When IC202 is ready, it outputs a low chip select signal (ch 4) from pin
97 to Interface IC201/pin 76. IC203, in-between IC201 and IC202,
translates the signal to a 5-volt level for IC201.

4. IC202 simultaneously sends serial clock from pin 78 to IC201/pin 70
(ch 3) during the chip select interval.

5. Data is transmitted from IC201/pin 71 to IC202/pin 76 (ch 2).

As seen below, the group of waveforms on the left in “tray 1” are of the
serial communications between IC201 and IC202 when the DVD player is
on. It consists of a low going interrupt pulse used for triggering at channel

1. This is better seen in the tray 2 waveform group taken at an expanded

time base. Shortly after interrupt (ch 1), clock (ch 3) and a chip select (ch

4) pulse appear. Then data (ch 2) is transmitted to IC202.

PM3394, FLUKE & PHILIPS

ch1

ch2

ch3

ch4

T

1

2

=A G
3

CH1!5.00 V=
CH2!5.00 V=
4

CH3!5.00 V=
CH4!5.00 V= CHP MTB10.0ms- 0.72dv ch1-

ch1

ch2

ch3

ch4

PM3394, FLUKE & PHILIPS

T

1

2

3

CH1!5.00 V=
CH2!5.00 V=
4

CH3!5.00 V=
CH4!5.00 V= CHP MTB 200us- 0.72dv ch1-

Waveform = tray 1 Waveform = tray 2

At almost the same time the display is lit, serial communications occurs
with System Controls IC202. The serial communications are always
present as long as the DVD player is on, but an additional group of data is
output when the S212 tray button is pressed. Serial communications in
this DVD player occur in the following sequence:

1. IC201 starts it with a single low (almost undetectable) interrupt pulse
from IC201/pin 78 (ch 1). Resistors R036 and R037 reduce the signal
for IC601. The input voltage should never exceed the IC’s supply
voltage.

Waveforms Tray 1 and 2 = DVD Player Powered ON

Name Location Voltage/div
Channel 1 XIFint(interrupt) CN006/pin 2 5Vp-p
Channel 2 Serial data (to IC202) CN006/pin 4 5Vp-p
Channel 3 Serial clock (SCO) CN006/pin 6 5Vp-p
Channel 4 Chip select (CSOL) CN006/pin 3 5Vp-p
Time base Tray 1 = 10msec/div. Tray 2 = 0.2msec/div

S213-S218
FRONT
PANEL
BUTTONS

R211

R213

R212

ON/OFF
S071

(FR101 BD.)

TRAY

OPEN/CLOSE

S212

EVER 5V

IC201
INTERFACE

16

CONTROL
M38857

MCH

SIN

AN1

5

SCLK

SBUSY1

S OUT

SRDY1

SEGMENTSDIGITS

ND201
FLUORESCENT
DISPLAY

FL101 BD.

72

70

76

71

78

CN202/
CN006

5

6

3

4

2

3

6

11

R044

R036

5V

14

IC203
BUFFER
SN74
HCT08

R037

1

4

12

R045

PARALLEL
BUS

22

3.3V

20

40

77

78

CSOL

97

SI0

76

XIF
INT

1

MB85 BD.

SO01

SC0

IC202
SYSTEM
CONTROL
MB91101
PFV

CS4

7

CS4

IC601
HGA
CXD8788Q

CS1

10

141142

CS1

LDMM

92

LD
MP/
OMP

4
43
69

70

93

1.6V REF
IC803/1

91

63

64

88

3.3V

R812

R811

R865

2.5V REF
IC803/7

LDMM

R004

R005

R006

3.3V

M+12V

22

23

R814R866

24

R813

OCSW2

OCSW1

CKSW1

R001 R002

28

VCC

D803

­+

R832

IC802
1/3

BA5983FP

DRIVER

3.3V

R003

9

2.3V

MUTE

MS-29 BD.

CN011/
CN001

1

M

TRAY

2

LOADING

S001
TRAY

CLOSED

6
4

3

= SHORTED

OPEN

S002

CHUCKED

TRAY MOTOR DRIVE

38

6 23 997DVD02 1147

39

The “tray 3” group of waveforms below are taken of the serial communi­cations occurring when the front panel tray button S212 is pressed. Note
that when comparing these waveforms to the group of “tray 1”, an extra
set of communications takes place 20msec later.

PM3394, FLUKE & PHILIPS

ch1

ch2

ch3

ch4

T

1

2

=A G
3

CH1!5.00 V=
CH2!5.00 V=
4

CH3!5.00 V=

CH4!5.00 V= CHP MTB10.0ms- 0.72dv ch1-

Waveforms Tray 3 = Tray Button Pressed

Name Location Voltage/div
Channel 1 XIFint(interrupt) CN006/pin 2 5Vp-p
Channel 2 Serial data CN006/pin 4 5Vp-p
Channel 3 Serial clock (SCO) CN006/pin 6 5Vp-p
Channel 4 Chip select (CSOL) CN006/pin 3 5Vp-p
Time base 10msec/div.

IC202 Instructs Hybrid Gate Array IC601

System Control IC202 coordinates and controls many operations. A Hy­brid Gate Array IC601 is used to interface IC202 to other ICs for analog
and digital operations. Information is sent between IC202 and IC601 us­ing a parallel bus and chip select lines. Communications between these
two ICs occurs when IC202/pins 7 and 10 applies a low to chip select
IC601/pin 142 & 141.

From this communication, the Hybrid Gate Array IC601/pin 92 outputs
the loading motor command using tri-state output. When the output is
open circuited, the loading motor does not turn. A high causes the tray to
open (extend).

IC601/pin 91 is grounded when the tray is out. This low is brought to
IC802/pin 9 to prevent the tray motor from moving (inhibited).

Loading Motor Command

Tray Motion Command Voltage at IC601/pin 92
Stopped 1.6V (open circuit)
Opening 3.2V
Closing 0V

Driver IC802 Translates the Command

Driver IC802 applies the voltage necessary to turn the loading motor.
The loading motor moves the tray. As the tray moves in, the motor pulls
up the laser platform.

Tray Drive Voltages

Tray CN011/pin 1 CN011/pin 2
Stopped 5.7V 5.7V
Opening 7.36V 3.5V
Closing 3.6V 7.6

Tray Position Switch Returns Information to IC201

Two switches under the transport on the MS-29 board detect the tray and
laser platform position. Both of these switches return status information
to Interface IC201.

Tray position switch S001 stops the loading motor during tray open. IC601
receives the switch information and opens drive pin 92 to stop the loading
motor. Both S001 and S002 stop the motor during tray close.

Tray Position Switch Voltages

Tray Position Switch S001 Chuck Switch S002
Tray CN011/pin 3 CN011/pin 4 CN011/pin 6
Open 3.2V 0V 3.2V
Closed 0V 3.2V 0V

S001 and S002 switch information pass IC601 and IC202 to IC201:

1. This information completes the tray position logic so the motor can
reverse rotation with each press of the tray button.

2. Activates the loading motor if the user has pushed the tray in.

If IC201 does not receive the correct tray closed or open feedback, the
loading motor will be instructed to reverse direction.

S213-S218
FRONT
PANEL
BUTTONS

R211

R213

R212

ON/OFF
S071

(FR101 BD.)

TRAY

OPEN/CLOSE

S212

EVER 5V

IC201
INTERFACE

16

CONTROL
M38857

MCH

SIN

AN1

5

SCLK

SBUSY1

S OUT

SRDY1

SEGMENTSDIGITS

ND201
FLUORESCENT
DISPLAY

FL101 BD.

72

70

76

71

78

CN202/
CN006

5

6

3

4

2

3

6

11

R044

R036

5V

14

IC203
BUFFER
SN74
HCT08

R037

1

4

12

R045

PARALLEL
BUS

22

3.3V

20

40

77

78

CSOL

97

SI0

76

XIF
INT

1

MB85 BD.

SO01

SC0

IC202
SYSTEM
CONTROL
MB91101
PFV

CS4

7

CS4

IC601
HGA
CXD8788Q

CS1

10

141142

CS1

LDMM

92

LD
MP/
OMP

4
43
69

70

93

1.6V REF
IC803/1

91

63

64

88

3.3V

R812

R811

R865

2.5V REF
IC803/7

LDMM

R004

R005

R006

3.3V

M+12V

22

23

R814R866

24

R813

OCSW2

OCSW1

CKSW1

R001 R002

28

VCC

D803

­+

R832

IC802
1/3

BA5983FP

DRIVER

3.3V

R003

9

2.3V

MUTE

MS-29 BD.

CN011/
CN001

1

M

TRAY

2

LOADING

S001
TRAY

CLOSED

6
4

3

= SHORTED

OPEN

S002

CHUCKED

TRAY MOTOR DRIVE

40

6 23 997DVD02 1147

41

Initial Sled Motor Drive

Initial Sled Movement

Start
When the laser’s platform is lifted to a level position, the disc is sand-

wiched between the spindle motor table and the magnet. In this position
the disc is said to be “chucked”. The chucked position requires System
Control IC202 to retrieve the initial sled program stored in EEProm memory
IC201 (not shown) via the parallel bus.

Movement
The program in IC201 instructs the sled motor to move the laser to home

position then quickly outward, but the sled does not stop. It just slows
down while the laser and focus search is activated. If a disc is found, the
sled stops and playback begins. However, if no disc is found, the sled
speeds up and moves outward again further into the disc area. As it
slows down a second time, the laser and focus system is instructed to
look for a disc (specifically its information layer). If it fails to find it, the sled
is quickly moved outward the last time for the third search. The “no disc
found” cycle concludes when the sled motor is reversed and the laser
assembly is driven home.

ICs Used
System Control IC202 controls the sled motor during this initial disc search

stage. A series of ICs are used for this control:

· System Control IC202 uses HGA IC601 as an expansion port

· HGA IC601 instructs Servo DSP IC701

· Servo DSP IC701 issues analog commands to Driver IC802

· Sled Driver IC802 sends voltages to the stepper sled motor

IC202 employs expansion port Hybrid Gate Array (HGA) IC601 for assis­tance in managing the remaining ICs.

IC202 to IC601 Communications

When IC202 wants to send data to IC601, IC202 must also send chip
select, clock, write pulses and address information to support the data.

IC202 to IC601 Communications Signals

Signal Active Signal Present When:

Chip Select (CS1 or CS4
from IC202/pins 10 or 7))

Clock IC202/pin 5 Low IC202 gets B+
Write IC202/pin 22 Low IC202 & IC205 gets Vcc
Six Address lines HA 0-5 IC202 gets B+
16 Data lines HD 0-15 IC202 gets B+

IC601 to IC202 Communications

When IC601 wants to send reply data to IC202, an interrupt signal is sent
to IC202. When IC202 is ready, it will send chip select, clock, read pulses,
and address to support the data received from IC601.

IC601 to IC202 Communications

Signal Active Signal Present When:

Interrupt (INT1 or INT3) Low

Chip Select (CS1 or CS4) Low IC202 & IC205 gets Vcc
Clock IC202/pin 5 Low IC202 gets B+
Read IC202/pin 24 Low IC202 & IC205 gets Vcc
Six Address lines HA 0-5 IC202 gets B+
16 Data lines HD 0-15 IC202 gets B+

Low IC202 & IC205 gets Vcc

An operation is completed
(e.g. sled moved)

System Control IC202 uses HGA IC601

System Control IC202 plans out the DVD operations, but turns the details
of each operation over to a partner IC. It is much like a manager who
starts many projects, but has the details of each project finished by a
subordinate. When there are too many projects, the manager needs help
from an assistant manager to help oversee the activity. System Controls

HGA IC601 Instructs Servo DSP IC701

IC601 controls many ICs. One of them is Servo DSP IC701. Communi­cations between these ICs use four control lines to transfer the address
and data on the parallel bus:

CS1

CS4
IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15

HA0-5
17-19

X201

12.5MHz

9291

10

94
88

7

CLK

5

RD

22

WE

24

INT1

INT3

ADDRESS

141
142

135
145
143

156
155

CS1
CS4

IC601
HGA
CXD8788Q

HA0--5
17-19

SDCPS
SDPWR
SPPRD

SDPIT

HD0

-15

91

59

118
116

INTERRUPT

LDMM

CS

WRITE

ADDRESS

IC701
SERVO DSP
CXD8791Q

3

HCS
HWR

2

HRD1117

HINT

128115

MB85 BD

108

PWM2
PWM0
PWM1

HD0-7EA0-1

FG
IN

7
9
8

23

X001
27MHz

STVC
SLDA
SLDB

D803

2.3V

9

2

IC802 2/3

3

SLED MOTOR
DRIVE

6

BA598IFP

12

3.3V

R832

AB

141311

LASER ASSEMBLY
KHM-220AAA

TK51 BD.

PARALLEL
BUS

DATADATA

3.3V

R752

11

8

R004

INITIAL SLED MOTOR DRIVE

42

5V

911

R001

1012

97108

CN003/
CN004

5

7

4

6
1

2
3

CN002

B

SLED
MOTOR

A

M

IN LIMIT

6 29 998DVD02 1148

+

+

43

IC601 and IC701 Communications

Name From IC When Present

1. Chip
Select

System Control IC202 Power on/off, playback, tray

open close, and start/stop..

2. Read System Control IC202 Always when powered on

3. Write System Control IC202

Completion of command
(PB, pause, pwr on/off)

4. Interrupt Servo IC701 Completion of command

(PB, pause, pwr on/off)
Address Bi-directional Always when powered on
Data Bi-directional Always when powered on

Bi-directional communications between IC601 and IC701 are similar to
that described for IC202 and IC601. The differences are in the IC pin
numbers and that IC601-IC701 communications are only taking place when
a servo command is changed.

Communications Waveforms
The following waveforms were taken during a sled forward command ini-

tiated from the service mode. They show IC701/pin 3 being chip selected
when low (ch 1). This means 16 bits of data (HD0-15) can be transferred
at each clock interval when this line is low. The chip select pulse is as
wide as three clock intervals. Consequently three groups of data (HD0­15 =16 bits) can be written or read by IC202.

The write line (ch 3) goes low during the chip select interval (ch 1) to
identify the direction of the (sled forward) bus data into Servo IC701. The
read line is high during this time, meaning it is inactive. The interrupt
signal will go low later on after the sled fast forward movement has been
completed (ch 4).

ch1

ch2

ch3

ch4

PM3394, FLUKE & PHILIPS

T

1

2

3
CH1!2.00 V=
CH2!2.00 V=

CH3!2.00 V=

CH4!2.00 V= ALT MTB 250ns- 1.06dv ch1-

4

IC601 to IC701 Communications Waveforms

Name Location Voltage/div
Channel 1 Chip Select (HCS) IC701/pin 3 2Vp-p
Channel 2 Read (HRD) IC701/pin 1 2Vp-p
Channel 3 Write (HWR) IC701/pin 2 2Vp-p
Channel 4 Interrupt (HINT) IC701/pin 128 2Vp-p
Time base 0.25usec/div.

Servo DSP IC701 Issues Analog Commands to Driver IC802

Digital commands from IC202 (via IC601) tell Servo IC701 to perform
sled operations. First IC701 sends an interrupt signal to IC202 (via IC601),
followed by data about the in limit sensor. This data tells IC202 if the laser
is at home position (IC701/pin 23 = 0.7V = home).

If the laser is not at home position, IC202 data to the Servo IC701 in­structs it to rotate the sled motor until home position is reached.

The sled output of Servo IC701 consists of three 50% duty cycle in phase
square waves at about 80kHz. The square wave from IC701/pin 7 is
used as reference and does not change. If the square wave from pin 8 or
9 decreases in width, the sled motor rotates. This can be seen in the
following waveforms.

Sled Motor Stop Waveforms
The following waveforms were taken of the square waves from IC701

when the sled motor is not turning and when it is moving away from the
spindle shaft (outward).

ch1

ch2

ch3

PM3394, FLUKE & PHILIPS

ch1: freq= 79.4kHz

T

1

2

CH1!2.00 V=

CH2!2.00 V=

3
CH3!2.00 V= ALT MTB5.00us ch1+

Sled Still Sled Outward

ch1

ch2

ch3

PM3394, FLUKE & PHILIPS

ch1: freq= 79.4kHz

T

1

2

CH1!2.00 V=

CH2!2.00 V=

3
CH3!2.00 V= ALT MTB5.00us ch1+

CS1

CS4
IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15

HA0-5
17-19

X201

12.5MHz

9291

10

94
88

7

CLK

5

RD

22

WE

24

INT1

INT3

ADDRESS

141
142

135
145
143

156

155

CS1
CS4

IC601
HGA
CXD8788Q

HA0--5
17-19

SDCPS
SDPWR
SPPRD

SDPIT

HD0

-15

91

59

118
116

INTERRUPT

LDMM

CS

WRITE

ADDRESS

IC701
SERVO DSP
CXD8791Q

3

HCS
HWR

2

HRD1117

HINT

128115

MB85 BD

108

PWM2
PWM0
PWM1

HD0-7EA0-1

FG
IN

7
9
8

23

X001
27MHz

STVC
SLDA
SLDB

D803

2.3V

9

2

IC802 2/3

3

SLED MOTOR
DRIVE

6

BA598IFP

12

3.3V

R832

AB

141311

LASER ASSEMBLY
KHM-220AAA

TK51 BD.

PARALLEL
BUS

DATADATA

3.3V

R752

11

8

R004

INITIAL SLED MOTOR DRIVE

44

5V

911

R001

1012

97108

CN003/
CN004

5

7

4
6

1
2

3

CN002

B

SLED
MOTOR

A

M

IN LIMIT

6 29 998DVD02 1148

+

+

45

Sled Stepping Motor

Name Location Voltage/div
Channel 1 STVC (ref) IC701/pin 7 2Vp-p
Channel 2 SLDA (inward) IC701/pin 9 2Vp-p
Channel 3 SLDB (outward) IC701/pin 8 2Vp-p
Time base 5usec/div.

The sled motor can be driven manually in either direction to produce the
waveforms shown by using the test mode’s manual servo control.

Sled Driver IC802 Sends Voltages to the Stepper Sled Motor

When the input pulses to pulse Sled motor Driver IC802 are not identical
to the input reference, the sled motor is driven. At the output, if pulses to
the B coil of the stepper type sled motor are lower than the pulses applied
to the A coil, the sled moves the laser outward. This can be seen in the
waveforms taken at IC802’s output.

Sled Motor Waveforms
All four sled motor drive signals in these waveforms show that the B coil of

the stepper motor gets a reduced amplitude pulse to move the laser as­sembly outward.

ch1

ch2

ch3

ch4

Channel 1 B coil - CN003/pin 11 5Vp-p
Channel 2 B coil + CN003/pin 8 5Vp-p
Channel 3 A coil - CN003/pin 7 5Vp-p
Channel 4 A coil + CN003/pin 9 5Vp-p
Time base 50msec/div.

PM3394, FLUKE & PHILIPS

1

2

T

3

CH1!5.00 V=
CH2!5.00 V=

CH3!5.00 V= STOP
4

CH4!5.00 V= CHP MTB50.0ms- 1.34dv ch3-

Outward Sled Drive Waveforms

Name Location Voltage/div

Sled Drive Mute/Inhibit

The sled and loading motors are inhibited when the tray is out. IC601
performs this operation by grounding IC802/pin 9 to stop the driver IC802.

Driver IC 802/pin 9 Mute/Inhibit
IC802/pin 9 Voltage Mode

2.3V = normal operation Tray closed
0V = tray loading and sled motors inhibited Tray open

Home Position Detection

The laser assembly’s home position is identified by a in-limit photodetec­tor within the assembly. The photodetector consists of an IR LED and a
photo transistor. Light from the LED passes through an open area to
turn on the phototransistor, placing CN003/pin 11 at ground level. When
the laser assembly arrives at home position, it blocks the light, permit­ting IC701/pin 23 to go high. IC701 relays this information to Syscon
IC201, via IC601 and home is identified.

The verification of this detector is important to determine if IC202 can
complete the initial check sequence and remain powered ON.

1. Place the unit in the special test mode (From power OFF, Press front
panel buttons RETURN and STOP together. Press MENU on the
remote. The unit will power up if IC201 and the power supply are
OK).

2. Measure the voltage at MB-85 board, CN003/pin 11.

· 3V = Laser at home (by the spindle motor)

· 0V = Laser away from home

3. You can manually push the metal laser base to slide the laser.

CS1

CS4
IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15

HA0-5
17-19

X201

12.5MHz

9291

10

94
88

7

CLK

5

RD

22

WE

24

INT1

INT3

ADDRESS

141
142

135
145
143

156

155

CS1
CS4

IC601
HGA
CXD8788Q

HA0--5
17-19

SDCPS
SDPWR
SPPRD

SDPIT

HD0

-15

91

59

118
116

INTERRUPT

LDMM

CS

WRITE

ADDRESS

IC701
SERVO DSP
CXD8791Q

3

HCS
HWR

2

HRD1117

HINT

128115

MB85 BD

108

PWM2
PWM0
PWM1

HD0-7EA0-1

FG
IN

7
9
8

23

X001
27MHz

STVC
SLDA
SLDB

D803

2.3V

9

2

IC802 2/3

3

SLED MOTOR
DRIVE

6

BA598IFP

12

3.3V

R832

AB

141311

LASER ASSEMBLY
KHM-220AAA

TK51 BD.

PARALLEL
BUS

DATADATA

3.3V

R752

11

8

R004

INITIAL SLED MOTOR DRIVE

46

5V

911

R001

1012

97108

CN003/
CN004

5

7

4
6

1
2

3

CN002

B

SLED
MOTOR

A

M

IN LIMIT

6 29 998DVD02 1148

+

+

47

0

Laser Servo

After the disc tray is closed (disc chucked/platform up), the laser is turned
on. The laser on command takes this six-step path from IC202:

1. System control IC202 2. HGA IC601

3. Servo DSP IC701 4. DVD/CD RF Amplifier IC0

5. Q101 6. DVD/CD Laser Module

System Control IC202 and HGA IC601 Communications

After System Control receives the platform up verification (S002 in the
Tray Motor Drive diagram), it gives the command to move the sled to the
home position, then outward. The laser is timed by IC202 to turn on
about the time the sled has already moved away from home position and
is resting under the disc.

HGA IC601 to Servo DSP IC701 Communications

The laser turn on instruction is sent from IC601 to DSP IC701 using the
parallel bus. Since the bus is used by other ICs as well, communication is
valid between these ICs when the CS chip select at IC701/pin 3 is low.

Servo DSP IC701 to RF Amplifier IC001 Communications

The laser turn on command uses three of the four communications lines
that interconnect IC701 and IC001:

IC701 – IC001 Communications

Label Location Description

1. SSCS CN002/pin 5 High for 16 bits of data (load)

2. SSRD CN002/pin 6 Not used

3. SSWD CN002/pin 7 Clock

4. SSCK CN002/pin 8 Data

The following waveforms show the communications between the two ICs
when PB is pressed. Waveform group “Comm 2” was taken at an ex­panded time base. They show that SSCK (ch4) is actually the data line
and not the clock. The SSCS (ch 1) marks the 2-byte group of data by

remaining high for 16 bits. SSWD (ch 3) is the clock signal, and not a
write command. These waveforms are only present at disc PB start and
stop.

ch1

ch2

ch3

ch4

PM3394, FLUKE & PHILIPS

T

1

2

3

CH1!2.00 V=
CH2!5.00 V=

CH3!2.00 V=
4
CH4!2.00 V= CHP MTB1.00ms- 0.30dv ch1+

ch1

ch2

ch3

ch4

PM3394, FLUKE & PHILIPS

T

1

2

3

CH1!2.00 V=
CH2!5.00 V=

CH3!2.00 V=
4
CH4!2.00 V= CHP MTB50.0us- 1.58dv ch1+

Waveform Comm 1 Waveform Comm 2

Communications 1 and 2 when the Play button is Pressed

Name Location Voltage/div
Channel 1 SSCS CN002/pin 5 3Vp-p
Channel 2 SSRD CN002/pin 6 0Vp-p
Channel 3 SSWD CN002/pin 7 3Vp-p
Channel 4 SSCK CN002/pin 8 3Vp-p
Time base Comm 1 = 1msec/div. ; Comm 2 = 50usec/div.

Laser Life
There are three ways to predict laser life:

q Laser current – Measures the voltage across R005 at Q001/emitter.

New laser = 0.733V. Bad laser will read over 1 volt.

q Laser operating hours – From the test mode adds the CD and DVD

hours. This accumulative information is stored in IC201 EEProm.

q Laser light – 0.18mW was measured using the wrong (freq) laser power

meter (Leader model 8001). 0.35mW of power is the correct power
level using the model 8000 (HeNe position).

DVD/CD Laser Module

The laser turns on when the voltage from CN001/pin 2 = 2 volts. Within
the laser module is a light receiving diode that monitors the laser light
intensity. This voltage is fed back to IC001/pin 19 for regulation. The
voltage is the same for CD and DVD SL PB.

MB85 BD.

TK51 BD,.

5V

IC701
SERVO
DSP
CXD879
1Q

PARALLEL
BUS

44
43
42
41

CS

3

FROM HGA
IC601/118

SSCS
SSRD
SSWD
SSCK

CN002/
CN003

14

5
6

13

12

7
8

11

46

SDEN

45

SRO

44

SWD

43

SCLK

IC001
DVD/CD
RF AMP
SSI33P
3722

SDEN - CHIP SELECT
SRO

- NOT USED

- CLOCKSWD

- DATASCLK
COMMUNICATIONS
ONLY WHEN A
CHANGE IS NEEDED

LD

PD

20

19

R007

R008

3.66V

+

C012

C016

3.6V

Q001 VOLTAGES

R005

BELASER

3.64.27ON

5.05.1OFF

P

Q001

LESS THAN
2V

R006

4.27V

C

2.24

L001

C006

CN002

VLD

LD

R002
100

6

LD

2

VR

5

PD

4

5V

2.24V

+

D003

OHMS

0.174V

WARNING:
NEVER LOOK DIRECTLY AT
THE LASER LIGHT
LASER POWER = 0.15mW IN
THE MODEL DVPS530D.
MEASURED WITH A LEADER MODEL
8001 LASER POWER METER

DVD/LD
LASER
MODULE

BASE UNIT
KHM-220AAA

LASER SERVO

48

6 23 999DVD02 1160

49

g

KHM-220A DVD Optical Block

Sony DVD players had two independent laser assemblies. One was used
to play DVD and the other used to play CDs. In 1999, a single DVD laser
in the KHM-220A block was used to play both discs. There were two
additional G & H photo detectors added to the optical assembly, but they
are not used.

By examining disc focusing, we can see why the lens was altered to play­back a CD with a DVD laser.

DVD Focus

Focusing the DVD laser on the information layer of the disc is not simple.
The DVD laser must pass through the objective lens before reaching the
disc. Like a magnifying glass, this convex lens focuses the beams of light
into a point above the lens. As the beam leaves the lens, it passes from
air into the polycarbonate CD. This change in medium (density) refracts
or bends the light.

0.6 cm

Focus Points
Close To

ether

DVD
Info Layer

CD Focus

The information layer within a DVD is at the center of the disc. The infor­mation layer in a CD is at the top. The laser beam has to go further into
the CD disc.

1.1 cm

Objective Lens

Focus
Points

Info Layer

CD

Refraction

Laser

Objective Lens

DVD Laser

DVD PLAYBACK

The frequency of the laser, the transition medium and the angle of light
entry determines the amount of refraction. Bending of the light as it en­ters the disc causes a few focus points to form within. The focus points
form a short line perpendicular to the DVD’s information layer. Because
the laser beam only travels a short 0.6cm in a DVD disc before arriving at
the information layer, the number of valid focus points is limited.

DVD Laser

CD FOCUS - NO CORRECTION

Because the beam must go further, the focus points are spread into a
longer line perpendicular to the CD’s information layer. Any point along
this line results in a correct focus point, causing focus variations and RF
eye pattern fluctuations.

This focusing aberration was corrected by reshaping the objective lens to
read the CD. The lens changes the angle of the light as it enters the CD,
reducing the number of focus points. The beam can now focus on the CD
layer, but the objective lens must move slightly higher to compensate for
the angle change.

g

1.1 cm

Single
Focus
Point

Info Layer

CD

Objective

Lens

DVD

Laser

Light

DVD
Laser
Beam

2ND
Order

2ND
Order

Defraction
Gradin

1ST
Order

Main
Laser
Beam

1ST
Order

To
Objective
Lens

CD FOCUS CORRECTED

Three Laser Beams from One Laser

Although there is one laser, there are three spots of light on the disc’s
information layer. The three spots are made by diffraction grading inside
the laser assembly.

A diffraction grading is made of a glass sheet with lines etched on it form­ing channels. The channels are represented by the spaces between the
dotted lines in the diagram. As the main laser beam passes through a
channel, secondary light beams are produced. The first order beams are
the strongest and these are the two additional (side) spots that pass through
the objective lens onto the disc. These side spots are used for CD track­ing.

50

51

Photo Detectors

The three beams of light are reflected from the disc and returned to the
optical assembly. They land on the photodetectors within these three
groups.

E F

A D

C B

G H

KHM - 220AAA

PHOTO DETECTORS

The voltages from these detectors are matrixed by RF Amplifier IC001
that follows (on the TK-51 board) into servo correction and disc identifica­tion signals.

Photo Detector Manufactured Signals

Photo

Detectors

A – D TE (DVD only)

E, F * TE +, TZC CD Tracking error, track count.
G,H * TE –, TZC CD Tracking error, track count

Signals

Produced

FE, PI, Mirr., RF
(eye pattern)

Purpose

TE – DVD tracking error
FE – Focus error
PI – “Pull In” is the analog sum of A-D

detectors used to ID the disc and
create MIRR.

MIRR – mirror signal goes high (4V) if
PI is above a threshold. MIRR is used
to count tracks and ID the disc.

RF – Audio and Video Data

*In CD and older DVD players, there are only two outer tracking error
detectors (E & F). In this new laser assembly, two outer detectors were
added but they are not used in this player.

The extra detectors are to permit this laser assembly to read DVD-R discs
in future players. This DVD player cannot play DVD-Recordable discs
even though the laser has the ability to do so. Detectors E & F are added
together and treated as one. G & H detectors are also added in the matrix
/ RF amp IC001 that follows (not shown).

NOTES

52

53

Disc Identification

DVD Player models DVP-S330, S530D, S550D and S705D identify the
disc during focus search as the laser’s objective lens is rising. Photo
detector group A-D in the optical assembly is used for this detection pro­cess. These detector outputs are matrixed by the RF amplifier IC001 to
produce several outputs. Two signals are used to identify one of four
discs placed in the player.

Mirror – Voltage created when the light returned from the disc exceeds a
threshold. The light is the strongest when focus is near.

Focus Error – Identifies the exact point of focus. The point of focus will
occur within the window created by the MIRROR signal.

The Mirror signal is used for disc detection. The focus error signal is used
to verify that the mirror signal is a valid one.

Operation

During focus search, the laser’s objective lens is instructed to move up
and down while light reflected back from the disc is analyzed. As the lens
moves up during focus search, so does its corresponding focus point.

Light is first returned when the focus point arrives at the bottom of the
disc. This creates the first voltage (disc entry) at the mirror output. A
second voltage occurs when the information layer is found. A third volt­age occurs if there is a second information layer. The time between the
voltages determines the disc type.

SACD Disc Type

SACD stands for Super Audio Compact Disc. Although this DVD player
can detect the SACD disc, it can only play its normal CD layer (number
two). The first layer can contain six channels of uncompressed audio and
a PCM audio track. At this time the SACD disc is only available in Japan.

For example, in a DVD disc the information layer is closer to the bottom of
the disc than a CD. Therefore in a DVD, the second mirror signal will
occur sooner than in a CD where the layer is further away.

This disc ID information is initially used to determine the rough speed of
the disc. Finally, the disc type is authenticated during playback when the
digital data reveals the disc type.

Therefore the first full upward travel of the lens during focus search will
identify the disc type.

DISC TYPE

CD

DVD
SL

0.6 CM

1.1 CM
INFO LAYER

INFO LAYER

OPTICAL BLOCK

MIRROR SIGNAL

CD

DISC ENTRY

DVD SL

DVD
DL

SACD

0.6 CM

0.6 CM 1.1 CM

2ND LAYER
1ST LAYER

2ND LAYER

1ST LAYER

DISC IDENTIFICATION CONCEPT

DISC

ENTRY

DISC

ENTRY

DISC

ENTRY

INFO

LAYER

DVD
DL

1ST 2ND

LAYER

DVD?
SACD

1ST 2ND

LAYER

20DVD02 6 7 99

54

55

g

Focus

Mechanical focus of the laser beam on the information layer of the disc is
accomplished by moving the laser’s objective (final) lens closer to or away
from the disc. Applying a current to a coil that is attached to the lens
controls the lens position. When the lens moves up and down, so does its
corresponding focus point at the disc area. Focus is found when the
laser’s focus point rests on the information layer of the disc.

Search

There is a large and a small lens movement associated with focus. The
large up and down lens movement is used to locate a disc by moving the
focus point until it finds the disc layer. This large lens movement is called
focus search and can be seen by observing the lens after the tray moves
in.

Focus search employs five ICs and the focus coil. System Control IC202
initiates focus search by sending data to IC701 which makes voltage to
move the lens. The results of the search are sent as data from IC701
back to IC202 on the parallel bus so a stop search command from IC202
can follow. Details of the IC202 and IC701 bi-directional communications
are explained later.

Focus Search Devices

Device Purpose

System Control IC202

EEProm Memory IC201 Stores focus search sequence
HGA IC601 Expansion port for IC202
Servo IC701

Driver IC801 Voltage to current coil driver
Focus coil Moves objective lens
RF Amp IC001 Feedback to electrically identify focus

Retrieves and acts on the focus search
program stored in memory

Translates di

•

analog focus coil voltages

Identifies disc’s layer using IC001

•

ital commands to

Focus Search End – Disc Identification
Focus search concludes when focus is found or when the search cycle is

over and no disc was found. Using A to D laser diode signals from the
optical base unit electrically identifies the mechanical focus on the disc
layer. RF Amp IC001 combines them to output PI (pin 29) and FE (pin

40) signals. Both are needed to find the focus position and stop focus
search. PI identifies a disc when the signal goes high. FE identifies the
focus position as this line rises and crosses 1.8V on the way down during
search.

Once the focus position has been found, the lens search operation ends
and the servo operation begins. IC701 makes the crossover by informing
System Control IC202 the disc layer has been found when FCSON from
IC701/pin 39 goes high. It remains high as long as focus is maintained by
servo IC701.

Servo

Once the disc layer is found during focus search, smaller lens move­ments maintain focus as the disc is spun during playback. The focus
servo uses three ICs to provide small correction voltages to the focus coil:

Focus Servo Devices

Device Purpose
RF Amp IC001 Feedback to electrically identify focus
Servo IC701 Identifies disc’s layer position using IC001
Driver IC801 Voltage to current coil driver
Focus coil Corrects objective lens position

The FE signal from IC001/pin 40 is used not only to stop focus search, but
also to maintain playback focus. This error signal is amplified and output
IC701/pins 7 and 9 to drive the focus coil.

IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15
HA0-5

17-19

X201

12.5MHz

9291

CS1

10

CS4

22

24
94

88

7

CLK

5

RD

WE

INT1
INT3

ADDRESS

141

142

135
145
143
156

155

CS1
CS4

HAO-5,
17-19

IC601
HGA
CXD8788Q

SDCPS

SDPWR

SDPRD HRD

SDPIT

HDO

-15

PARALLEL
BUS

93
59

118
116
117

INTERRUPT

54

XDRV MUTE

CS

WRITE

READ

FCSON

ADDRESS

3
2

1

128115

39

DATADATA

108

HCS

HWR

HINT
G
1010

EA0-1

IC701
SERVO DSP
CXD8791Q

HD0-7

ADC2

68

PI

12

7

29

Q801

X001
27MHz

DAB3

80

DAB2

85

ADC1

PI

IC001
DVD/CD RF AMP

SSI33P3722

68

10

21

TR
IN

FE

9

FE

40

9-12

FCD-

R802

R801

FCD+

16

MIRROR

CN002/
CN003

3

26

D806

2
3

9

IN1­IN1+

6

0V
MUTE

+DO1-DO1
1413

1213

7

IC801 1/3
FOCUS COIL
DRIVER
BA5981FP

CN003/
CN004

TK51 BD.

MB-85 BD.

FOCUS

56

A-D

MATRIX
AMP./

LASER

CN001

20

1716109

19

LENS

FOCUS
COIL

KHM-220AAA
LASER ASSEMBLY

6 29 9911DVD02 1155

57

Focus Drive

Servo IC701 outputs two square waves from pins 80 and 85 as long as
the set is powered. The reference square wave comes from pin 80 and is
fixed at 50% duty cycle. When the duty cycle of pin 85’s waveform changes,
the focus coil receives current.

The following waveforms were taken during focus search. Note that the
falling edge of the reference waveform (ch 2) is always in line with the
drive signal (ch 3) from pin 85.

ch2

ch3

Channel 2 FCD - IC701/pin 80 2Vp-p
Channel 3 FCD + IC701/pin 85 2Vp-p
Time base 2usec/div.

This second group of waveforms compares the input and output of the
driver IC801 during playback. When there is a change to the duty cycle of
pin 9’s waveform, there is a differential voltage applied to the focus coil.

ch1

ch2

ch3

ch4

PM3394, FLUKE & PHILIPS

ch2: freq= 79.4kHz

2

T

3
CH2!2.00 V=

CH3!2.00 V= ALT MTB2.00us- 1.16dv ch3-

Focus Search Waveforms

Name Location Voltage/div

PM3394, FLUKE & PHILIPS

ch1: pkpk= 3.80 V

ch1: freq= 79.4kHz

1

T
2

Focus Driver IC801 Input/Output

Name Location Voltage/div
Channel 1 FCD - IC701/pin 80 2Vp-p
Channel 2 FCD + IC701/pin 85 2Vp-p
Channel 3 + DO 1 CN003/pin 12 1Vp-p AC coupled
Channel 4 - DO 1 CN003/pin 13 1Vp-p AC coupled
Time base 5usec/div.

Driver IC801 supplies the current to the focus coil within the optical base
assembly. The spring suspended focus coil is attached to the lens posi­tioned next to a stationary magnet. The lens is moved when current is
applied to the coil. Lens movement changes the laser’s focal point.

Focus Search Communications

System Control IC202 to Servo IC701

During focus search, bi-directional communications take place between
IC202 and IC701. Since the number of output ports IC202 has is limited,
HGA IC601 is used as an expansion port to control the flow of bi-direc­tional information to and from destination ICs such as IC701. All three
ICs share a common address and data bus. The information placed on
the bus is time-shared by each IC. The time is controlled by System
Control IC202.

System Control IC202 to HGA IC701

IC202 cannot communicate with IC701 directly to control servo opera­tions. It must use a middleman - IC601. IC601 handles so many opera­tions it is electronically divided, having two chip select inputs.

When IC202 wants to send data to IC601, IC202 must also send chip
select, clock, write pulses and address information to support the data.

3

CH1!2.00 V=

CH2!2.00 V=
4

CH3!1.00 V~

CH4!1.00 V~ ALT MTB5.00us- 0.94dv ch2+

IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15
HA0-5

17-19

X201

12.5MHz

9291

CS1

10

CS4

22

24
94

88

7

CLK

5

RD

WE

INT1
INT3

ADDRESS

141

142

135
145
143
156

155

CS1
CS4

HAO-5,
17-19

IC601
HGA
CXD8788Q

SDCPS

SDPWR

SDPRD HRD

SDPIT

HDO

-15

PARALLEL
BUS

93
59

118
116
117

INTERRUPT

54

XDRV MUTE

CS

WRITE

READ

FCSON

ADDRESS

3
2

1

128115

39

DATADATA

108

HCS

HWR

HINT
G
1010

EA0-1

IC701
SERVO DSP
CXD8791Q

HD0-7

ADC2

68

PI

12

7

29

Q801

X001
27MHz

DAB3

80

DAB2

85

ADC1

PI

IC001
DVD/CD RF AMP

SSI33P3722

68

10

21

TR
IN

FE

9

FE

40

9-12

FCD-

R802

R801

FCD+

16

MIRROR

CN002/
CN003

3

26

D806

2
3

9

IN1­IN1+

6

0V
MUTE

+DO1-DO1
1413

1213

7

IC801 1/3
FOCUS COIL
DRIVER
BA5981FP

CN003/
CN004

TK51 BD.

MB-85 BD.

FOCUS

58

A-D

MATRIX
AMP./

LASER

CN001

20

1716109

19

LENS

FOCUS
COIL

KHM-220AAA
LASER ASSEMBLY

6 29 9911DVD02 1155

59

,

,

IC202 to IC601 Communications

Signal Active Signal Present when
Chip Select (CS1 or CS4) Low IC202 & IC205 gets Vcc
Clock IC202/pin 5 Low IC202 gets B+
Write IC202/pin 22 Low IC202 & IC205 gets Vcc
Six Address lines HA 0-5 IC202 gets B+
16 Data lines HD 0-15 IC202 gets B+

When IC601 wants to send reply data to IC202, an interrupt signal is sent
to IC202. When IC202 is ready, it will send chip select, clock, read pulses
and address to support the data received from IC601.

IC601 to IC202 Communications

Signal Active Signal Present when

Interrupt (INT1 or INT3) Low

Chip Select (CS1 or CS4) Low IC202 and IC205 gets Vcc
Clock IC202/pin 5 Low IC202 gets B+
Read IC202/pin 24 Low IC202 and IC205 gets Vcc
Six Address lines HA 0-5 IC202 gets B+
16 Data lines HD 0-15 IC202 gets B+

An operation is completed
(e.g. sled moved)

HGA IC601 to Servo IC701

IC601 to IC701 Communications

Signal Active Signal Present when

Chip Select (SDCPS
IC601/pin 118)

Clock Input IC701/pin 108 Low 3.3V is present
Write (SDPWR IC601/pin

116)
Two Address lines HA 0-1 IC202 gets Vcc
8 Data lines HD 0-7 IC202 gets Vcc

IC701 to IC601 Communications

Signal Active Signal Present when

Interrupt (HINT from
IC701/pin 128)

Chip Select (SDCPS
from IC601/pin 118)

Clock Input IC701/pin
108

Read from IC601/pin
117

Two Address lines HA
0-1

8 Data lines HD 0-7 IC202 gets Vcc

Low

Low

Low

Low Power on/off, Tray in/out

Low 3.3V is present

Low

Power on/off, Tray in/out,
disc playback

Power on/off, Tray in/out,
disc playback

An operation is completed
(e.g. sled moved)

disc playback

Power on/off, Tray in/out
disc playback

IC202 gets Vcc

Bi-directional communications between these two ICs is similar to that
described for IC202 and IC601. The differences are in the IC pin num­bers and that IC601-IC701 communications are only taking place when a
servo command is changed.

IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15
HA0-5

17-19

X201

12.5MHz

9291

CS1

10

CS4

22

24
94

88

7

CLK

5

RD

WE

INT1
INT3

ADDRESS

141

142

135
145
143
156

155

CS1
CS4

HAO-5,
17-19

IC601
HGA
CXD8788Q

SDCPS

SDPWR

SDPRD HRD

SDPIT

HDO

-15

PARALLEL
BUS

93
59

118
116
117

INTERRUPT

54

XDRV MUTE

CS

WRITE

READ

FCSON

ADDRESS

3
2

1

128115

39

DATADATA

108

HCS

HWR

HINT
G
1010

EA0-1

IC701
SERVO DSP
CXD8791Q

HD0-7

ADC2

68

PI

12

7

29

Q801

X001
27MHz

DAB3

80

DAB2

85

ADC1

PI

IC001
DVD/CD RF AMP

SSI33P3722

68

10

21

TR
IN

FE

9

FE

40

9-12

FCD-

R802

R801

FCD+

16

MIRROR

CN002/
CN003

3

26

D806

2
3

9

IN1­IN1+

6

0V
MUTE

+DO1-DO1
1413

1213

7

IC801 1/3
FOCUS COIL
DRIVER
BA5981FP

CN003/
CN004

TK51 BD.

MB-85 BD.

FOCUS

60

A-D

MATRIX
AMP./

LASER

CN001

20

1716109

19

LENS

FOCUS
COIL

KHM-220AAA
LASER ASSEMBLY

6 29 9911DVD02 1155

61

Spindle Motor

The spindle motor has a “kick” mode and a run mode. The kick mode is
used to start and stop the motor, bringing the motor up to speed or to a
stop quickly. The CLV PB mode utilizes the pits on the disc surface to
regulate the spindle motor speed.

Kick Mode

IC202 issues the kick command to start or stop the spindle motor. After­wards, all of the ICs in the Spindle Motor diagram are used in the kick
mode except for IC001.

IC202
In the start program, System Control IC202 kicks (starts) the spindle mo-

tor after focus is found (or after the optical assembly sleds to home posi­tion without a disc). This kick command is written to IC601 using:

· Chip select CS4 from IC202/pin 7 (low going)

· Clock from IC202/pin 5

· Write from IC202/pin 24 (low going)

· Address and Data on the parallel bus

IC601
Gate Array IC601 transfers this kick command to ARP2 IC303 using simi-

lar communications:

· Chip select CS4 from IC601/pin 111 (low going)

· Common bit clock from PLL IC001/pin 1

· Write from IC601/pin 109 (low going)

· Address and Data on the parallel bus

IC303
ARP2 IC303 produces pulses at pins 49 and 52 to control the spindle

motor. These motor drive speed (MDSO) and motor drive phase (MDPO)
outputs are tri state voltages, combined by R820 and R822 to current
drive IC802.

Tri State Voltages from IC303/pins 49 or/and 52

Output Spindle motor Direction

Open Circuit (1.6V external bias) No rotation

3.3V (pulse) Forward
0V (pulse) Slows down

During start, both outputs at IC303/pins 49 and 52 are at 3.3V to bring the
motor up to approximate data speed.

IC802
Spindle motor Driver IC802 takes the combined speed and phase volt-

ages input pin 26 and amplifies them. The differential DC voltage output
from IC802/pins 15 and 16 are applied to the spindle motor for rotation.
The higher the voltage, the faster the spindle motor rotates.

Spindle Motor Voltage

CD DVD
Start/Stop (kick) 5V (approx.) 6.3V (approx.)
Disc Inside PB 1.6V 2.8V
Disc Outside PB 0.98 1.5V

IC803
FG amplifier IC803 outputs a signal during a sudden spindle motor speed

change. This start/stop conformation signal is returned to IC202 via IC701
and IC601 as a completion of the issued command.

IC701 and IC601
The comparators in Servo IC701 use the voltage change at pin 65 to

determine when the spindle motor has started or stopped. This is be­cause IC303 in the kick chain is multi tasking and will be busy at start up.
IC701’s kick confirmation signal is sent to IC601, which transfers it to
System Control IC202. IC202 issues a kick stop signal after a fixed time.
The kick time duration depends upon the disc type detected. A DVD is
spun faster and consequently is kicked longer. After the kick mode, a
new command is issued to start the spindle motor servo in the run mode.

FROM
X001

27MHz

ARPINT

ARPRD
ARPWR

ARPCS

91

IC202
SYSTEM
CONTROL
MB91101
PFV

HAO-5,

HDO

17-19

-15

XT1

6

X201

12.5MHz

92

10

CS1

7

CS4

5

94

IC001
PLL1700E

107

110

109

111

141
142
135

ADDRESS

12

IC601
HGA
CXD8788Q

CS1
CS4

CLK

INT1156

HA0-5
17-19

ARPRD
ARPINT

SCKO1

CLK 33.8MHz

SDCPS

SDPWR

SDPIT

HD0

-15

PARALLEL
BUS

RF/CLK
COMPARISON
NO DISC=3V
LOCKED=0.5V

59

TO IC001/6

118

WRITE

116
117

54

FCSON

XWRARPWR
XRD

INT

X001
27MHz

CS

ADDRESS

DATADATA

AO-7

84

60
61

82

123

57

108

IC701
SERVO DSP
CXD8791Q

3

HCS

HWR

2

1

128115

39

EA0-1

XCS

IC303
ARP2
CXD8784R

RF IN

HINT

1719

ADC4

HD0-7

MD
SO

MD
PO

65

D8-15

49

52

14

RF

IC803
FG AMP
BA1032

4AFV 1/4

R823

1.6V
REF
IC803/1

R824

R820

R822

12

+

-

13

IC802 3/3
SPINDLE
MOTOR
DRIVER
BA5983P-E2

26

R816

TK51 BD.

CN003/
CN004

136
14

5

1615

M

IN4+IN4-

1.6V REF
IC803/1

SPINDLE

27

MB-85 BD.

1.4Vp-p DVD OR CD

IC001
RF AMP
SSI33
P3722

1

CN001

789

OPTICAL
DEVICE RF

BASE UNIT
KHM-220

54

CN003/
CN002

217

SPINDLE MOTOR

62

6 29 9912DVD02 1153

CLV PB Mode

In the CLV PB mode, IC001, IC303 and IC802 are used to regulate the
spindle motor speed. System Control IC202 issues a CLV run command
to IC303. By this time, the disc has reached data output speed so IC303
can use the data to govern the spindle motor. RF output from IC001/pin
54 is processed by IC303. IC303 compares the RF input to internal CD or
DVD references and produces MDS and MDP spindle motor correction
pulses. The correction pulses vary the speed of the motor so the RF disc
data is always output at a constant rate. This is called constant linear
velocity.

The following waveform taken during DVD playback shows that the MDP
(ch 2) signals are periodic pulses that keep the disc spinning forward.
The MDS (ch 1) pulses provide incremental speed correction in the form
of 3V or 0 V pulses to speed up or slow down the motor. The combined
MDP + MDS voltage at IC802/pin 26 is shown in channel 3. The feed­back signal (ch 4) is only present during a drastic spindle motor speed
change, so it remains at 3V during DVD playback.

PM3394, FLUKE & PHILIPS

ch1

ch2

ch3

ch4

T

1

2

3

CH1!2.00 V=

CH2!2.00 V=

CH3! 200mV~

CH4!2.00 V= CHP MTB50.0us ch1+

4

63

Motor Drive Signals

Name Location Voltage/div.
Channel 1 MDS IC303/pin 49 2Vp-p
Channel 2 MDP IC303/pin 52 2Vp-p
Channel 3 Composite

IC802/pin 26 0.2Vp-p (AC coupled)

drive
Channel 4 Feedback IC701/pin 65 2Vp-p
Time base 50usec/div.

FROM
X001

27MHz

ARPINT

ARPRD
ARPWR

ARPCS

91

IC202
SYSTEM
CONTROL
MB91101
PFV

HAO-5,

HDO

17-19

-15

XT1

6

X201

12.5MHz

92

10

CS1

7

CS4

5

94

IC001
PLL1700E

107

110
109

111

141
142
135

ADDRESS

12

IC601
HGA
CXD8788Q

CS1
CS4

CLK

INT1156

HA0-5
17-19

ARPRD
ARPINT

SCKO1

CLK 33.8MHz

SDCPS

SDPWR

SDPIT

HD0

-15

PARALLEL
BUS

RF/CLK
COMPARISON
NO DISC=3V
LOCKED=0.5V

59

TO IC001/6

118

WRITE

116
117

54

FCSON

XWRARPWR
XRD

INT

X001
27MHz

CS

ADDRESS

DATADATA

AO-7

84

60
61

82

123

57

108

IC701
SERVO DSP
CXD8791Q

3

HCS

HWR

2

1

128115

39

EA0-1

XCS

IC303
ARP2
CXD8784R

RF IN

HINT

1719

ADC4

HD0-7

MD
SO

MD
PO

65

D8-15

49

52

14

RF

IC803
FG AMP
BA1032

4AFV 1/4

R823

1.6V
REF
IC803/1

R824

R820

R822

12

+

-

13

IC802 3/3
SPINDLE
MOTOR
DRIVER
BA5983P-E2

26

R816

TK51 BD.

CN003/
CN004

136
14

5

1615

M

IN4+IN4-

1.6V REF
IC803/1

SPINDLE

27

MB-85 BD.

1.4Vp-p DVD OR CD

IC001
RF AMP
SSI33
P3722

1

CN001

789

OPTICAL
DEVICE RF

BASE UNIT
KHM-220

54

CN003/
CN002

217

SPINDLE MOTOR

64

6 29 9912DVD02 1153

65

Tracking Servo

The purpose of the tracking servo is to keep the laser beam positioned at
the center of the disc’s data (stream). This is achieved mechanically by
attaching a lightweight coil of wire to the laser’s objective (final) lens. This
coil faces a stationary magnet. Voltage applied to the tracking coil moves
the coil and its attached lens. The laser beam that passes through the
center of the lens is moved with the lens from side to side.

The sources of the tracking coil signals are four detectors in the optical
assembly base unit (E-H). These signals are matrixed by IC001 to make
a tracking error (TE) signal. When the TE signal is connected to the
tracking coil by IC701, the servo loop is complete and the servo is turned
on. The laser beam is now locked to the stream of disc data.

Tracking Servo

The tracking servo in IC701 is turned on by IC202 after the second focus
search while the disc is spinning. System Control IC202 must first com­municate with IC601, which relays that command to Servo IC701.

System Control IC202 Uses HGA IC601

IC202 sends a tracking servo on command using data on the parallel bus.
The transfer of data must be supported by additional signals from IC202:

IC202 to IC601 Communications Signals

Signal Active Signal Present when
Chip Select (CS1 or CS4) Low IC202 and IC205 gets Vcc
Clock IC202/pin 5 Low IC202 gets B+
Write IC202/pin 22 Low IC202 and IC205 gets Vcc
Six Address lines HA 0-5 IC202 gets B+
16 Data lines HD 0-15 IC202 gets B+

HGA IC601 to Servo DSP IC701 Communications

IC601 controls many ICs. One of them is Servo DSP IC701. Communi­cations between these ICs use four control lines to transfer the address
and data on the parallel bus:

IC601 and IC701 Communications

Name From IC When present

1. Chip
Select

2. Read System Control IC202 Always when powered on

3. Write System Control IC202

4. Interrupt Servo IC701 Completion of command

Address Bi-directional Always when powered on
Data Bi-directional Always when powered on

Servo IC701 turns on the tracking servo by completing the tracking servo
loop. IC701 amplifies the tracking error signal input pin 69 and outputs it
as a differential drive signal at pins 92 and 97.

System Control IC202 Power on/off, playback, tray

open, close and start/stop.

Completion of command
(PB, pause, pwr on/off)

(PB, pause, pwr on/off)

Track Counting in Pause or Picture Jump

The new single DVD/CD laser still projects three light beams close to­gether on to the disc. However, the early electronics inside the optical
assembly produce new tracking detector outputs (E-H) in addition to the
standard A-D RF outputs. IC001 matrixes the E-H tracking outputs to
produce:

TE = tracking error signal for the playback servo
TZC = tracking zero crossing signal from IC001/pin 32 to count tracks in

pause or when approaching a disc destination.
Both of these signals are applied to IC701. When the tracking servo is

turned on by IC202, IC701 is instructed to amplify (and LPF) the TE sig­nals from IC701/pin 69 and produce complementary signals at pins 92
and 97. The analog TZC signal at IC701/pin 20 is judged and sent to
IC202 (via IC601) as digital track count information on the parallel bus.
Driver IC801 just amplifies the input signal to drive the tracking coil.

IC202
SYSTEM
CONTROL
MB91101
PFV

HA0-5

HD0

17-19

-15

CS1

CS4

10

7

CLK

5

ADDRESS

IC601
HGA
CXD8788Q

141

CS1
CS4

142

135

HA0-5
17-19

MB85 BD.

SDCPS

SDPWR

SDPIT

HD0

-15

PARALLEL
BUS

93

118
116

INTERRUPT

54

FCSON

XDRV MUTE

CS

WRITE

128115

39

ADDRESS

DATADATA

IC701
SERVO DSP
CXD8791Q

3

HCS

HWR

2

HINT

G
1010

EA0-1

HD0-7

DAB0
DAB1

TZC

ADC1

69

TE

11

8

39

IC001
DVD/CD RF AMP

SSI33P3722

E-H

8

97
92

20

R805
R806

TRD-

13-16

11

Q801

TRD+

TZC

CN002/

14

CN003

5

32

1815

TRACKING

5
6

COIL

D806

IN2+
IN2-

0V

9

MUTE

IC801 3/3
TRACK COIL
DRIVER
BA5981FP

+DO2-DO2

1211

1415

5

4

21

22

TRK

CN003/
CN004

TK51 BD.

CN001

KHM-220AAA
LASER ASSEMBLY

LENS

TRACKING SERVO

66

MATRIX AMP.

LASER

6 29 9914DVD02 1155

67

Sled Motor Drive - PB

Initially during disc search, just System Control IC202 data was used to
move the sled motor. During playback, IC202 data and tracking error are
used to handle the sled movement. The choice is dependent upon the
location of disc information. When the disc is played linearly requiring
smooth sled travel, the tracking error signal is used to follow the track.
When information must be retrieved at a different part of the disc, System
Control IC202 instructs the sled to momentary move the laser assembly
to another location.

Following the Track

When playing a CD, and most of the time when playing a DVD, the sled is
periodically pulsed or “kicked” ahead so the tracking coil can remain within
operating range of the new disc information. These sled kick pulses origi­nate from the linear tracking error signal taken from Tracking Coil Driver
IC801/pin 6. This error signal is amplified internally and output IC801/pin

7.
The amplified tracking error signal is LPF by R707 and C705 before en-

tering IC702/pin 3. With C706 positioned between IC702/pins 1 and 2 for
negative feedback, IC702 is configured as an active LPF. These two low
pass filters remove the instantaneous tracking error “noise” component.
What is left is a DC voltage that increases when the tracking servo ap­proaches its mechanical limit.

The DC component of the tracking error signal is passed onto Servo IC701/
pin 66. IC701 makes a judgment about the input voltage level. When a
DC threshold is reached, IC701 “kicks” or rotates the sled motor forward
(laser outward) one step. The movement of the sled motor returns the
laser assembly to the center range of the tracking servo. This causes the
tracking error’s DC voltage component to drop below the sled movement
threshold.

Sled Movement to Another Location

Supplemental information can be found in different locations on the DVD
disc. When this information is called for, the sled is asked to move to
approximately that location. The disc information is played to determine
how close the laser is to the target. IC202 then decides to make a smaller
jump or remain where it is.

This sled movement is controlled by System Control IC202 after receiving
disc information from ARP2 IC303. IC202 communicates with IC701 on
the parallel bus in order to have IC701 move the sled. Once the sled is
moved, System Control IC202 waits for disc information (from Processor
IC303) to determine if the laser is close enough to the target information
before requesting another sled movement. If no sled movement is called
for, the laser plays through the supplemental information. Afterwards
IC202 instructs the laser to return to where it originated to resume normal
playback.

IC Summary Chart

ICs involved in Sled Movement

Disc Identification DVD Playback CD Playback
IC202 IC001 (TK51 Bd) IC001 (TK51 Bd)
IC601 IC303 IC701
IC701 IC202 IC702
IC802 IC601 IC801

IC701 IC802
IC702
IC801
IC802

2.5V REF. IC803/7

IC801 3/3
TRACKING
COIL

DRIVER
BA5981FP

IN2-

1211,

IN2+

TRACKING
COIL

2V(IC803/9)

C705

7

R707

R839

6
5

IC202
SYSCON
MB91101
PFV

OPTICAL
DEVICE
RF

R708

R805

1

RF

2
3

HA0-5,
17-18

HD0-

15

IC001
DVD/CD
RF AMP
SSI33P
3722

C706

R710

­+

IC702
NJM2904V

TK51 BD.

1

R806

ADDRESS

DATA

TE

39

IC701
SERVO DSP
CXD8791Q

66

R705

PARALLEL BUS

92
97

ADC3

DAB1

DAB0

EA0-1

TE

HD0-7

3.3V

PWM2
PWM0

PWM1

ADCO

FG
IN

69

11

8

R004

(REF)

STVC

7

SLDA

9

SLDB

8

23

R752

CN002/
CN003

MB 85 BD

2
3
6

11

8

IC802 2/3
SLED MOTOR
DRIVE
BA598IFP

AB

12

911

R001

5V

141311

97108

1012

CN002

LASER ASSEMBLY
KHM-220AAA

CN003/
CN004

+

5
7

4

B

6

+
1
2

3

IN LIMIT

SLED
MOTOR

A

M

SLED MOTOR DRIVE - PB

68

6 22 9915DVD02 1156

69

Tilt Servo

Operation

The laser is mounted on a platform that pivots at the center and rests on
an incline gear at one end. The tilt motor controls the incline gear and
consequently the angle of the laser beam with respect to the disc. The tilt
motor is operational at:

· Power ON – the laser platform is reset to mid position

· DVD Playback-the platform is moved when the RF level fluctuates

· Power OFF – the laser platform is brought to its lowest position

Power ON

At power on, the tilt motor resets the laser platform to mid position. At first
the laser platform is angled up at one end, then brought to the middle
using position data stored in EEProm IC201.

Tilt UP

The tilt motor shaft has a gear that mates with the incline gear. The
incline gear has mechanical stops at each end, which establishes upper
and lower limits to the laser platform that rests upon it. At power ON, the
tilt motor is rotated for a revolution of the incline gear (from one stop to the
other). At this point the platform is fully elevated and IC202 is aware the
platform is at this position.

Tilt to Mid Position

The tilt motor is a stepping motor. Each time the stepping motor is pulsed,
it moves the incline gear and corresponding laser assembly a known
amount. Consequently, IC202 can pulse the motor a given number of
times to reset the laser platform to mid position. At mid position, the laser
beam is perpendicular to the disc.

ICs Involved

Five ICs are used to perform this reset function:

· System Control IC202

· EEProm IC201

· Hybrid Gate Array IC601

· Servo DSP IC701

· Motor Driver IC801

At power on after initial communications, IC202 retrieves the servo mecha­nism reset data from EEProm IC201. IC202 issues the tilt motor turn
command to IC601 when it is chip selected (CS4 = low into IC601/pin

142). That information is transferred from IC601 to Servo IC701 at a
different time using a different chip select line (HCS at IC701/pin 3).

Servo IC701 interprets this input data and produces stepping pulses to
drive the tilt motor. The stepping pulses are out of phase to rotate the
motor in one direction.

The following waveforms show three tilt drive down pulses generated from
the servo control test mode. The TLTA signal appears before TLTB, caus­ing the tilt motor to rotate toward coil B (laser platform down). These
signals (ch 1 and 2) that are input to the tilt motor driver IC801 are com­pared to the drive output (ch 3 and 4). They show that only the TLTA
input signal corresponds to the ITA outputs to the tilt motor A coil.

Incline Gear

ch1

ch2

ch3

ch4

PM3394, FLUKE & PHILIPS

1

T

2

3

CH1!2.00 V=
CH2!2.00 V=

CH3!5.00 V=
4

CH4!5.00 V= CHP MTB 500ms- 3.28dv ch2-

IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15

SERIAL
BUS

X201

12.5MHzx

9291

CS1

CS4

HA0-5,
17-19

10

7

7

CLK

5

RD

22

WE

24

INT1

94

INT3

88

ADDRESS

141
142

142
135
145

143

156

HA0-5,

155

17-19

IC201
EEPROM
AK6440AF

CS1
CS4

IC601
HGA
CXD8788Q

SDCPS
SDPWR

SDPRD

SDPIT

HD0

-15

PARALLEL
BUS

93

59

118

116
117

INTERRUPT

115

XDRV MUTE

CS

WRITE

R

128

ADDRESS

DATADATA

3
2
1

108

HCS

HWR
HRD

HINT

HD0-7

1010

EA0-1

TK51 BD.

IC701
SERVO DSP
CXD8791Q

GI02
GI01

ADC2

2.4V

PI

IC001
DVD/CD RF AMP

SSI33P3722

OPTICAL DEVICE

X001
27MHz

48
49

67

PI

0.1Vp-p - DVD

0.2Vp-p - cd

CN002/

12

CN003

7

29

9-12

9

10

R843
R842

1716

Q801

2.5V REF
IC803/7

R841

TLTB

TLTA

A-D

D805

3V

24

IN3+

27

IN4+

26

IN4-

23

IN3-

1

18

13

AM

D806

20

MUTE

IC801 1/3
TILT MOTOR
DRIVER
BA5981FP

ITA,B

1815-

16

17

12

11

B

432

15

10

TO
IC801/9

CN003/
CN004

CN002CN001

TILT
MOTOR

TILT SERVO

70

6 22 9910DVD02 1151

71

Tilt Drive– Test Mode Tilt Down

Name Location Voltage/div
Channel 1 TLTB IC701/pin 48 2Vp-p
Channel 2 TLTA IC701/pin 49 2Vp-p
Channel 3 ITA - CN003/pin 1 5Vp-p
Channel 4 ITA + CN003/pin 2 5Vp-p
Time base 500msec/div.

Driver IC801 supplies the current necessary to develop the magnetic fields
in the motor to make it step. The tilt motor driver IC801 is inhibited (muted)
from working when the tray is out when a low is placed at IC801/pin 20.

DVD Playback

Only during DVD playback, the tilt servo adjusts the angle of the laser
beam to obtain minimum RF level fluctuations. The highest RF level is
achieved when the laser beam is perpendicular to the horizontal layer of
the disc. The tilt servo circuitry is most effective when the laser is at the
outer limits of a warped DVD disc.

Disc

laser

90 degree Laser angle

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

RF level

o

Laser Angle 85

90

o 95o

During CD playback, the incline gear remains at mid position. During
DVD disc playback, the tilt servo is active. The RF eye pattern signal from
IC001 is input to IC701/pin 67 and monitored by IC701. IC701 filters the
RF fluctuations and delivers this information as a digital level to System
Control IC202.

Laser beam per­pendicular to disc
results in max RF
output and lowest
fluctuations.

Delivery
First IC701/pin 128 sends an interrupt low to IC202 via IC601. When

IC202 is ready to receive this information, it sends a chip select low pulse
from IC601/pin 118 and a read low pulse from IC601/pin 115 so IC701
can send the low RF data information to IC601. IC601 passes this infor­mation to IC202 on the parallel bus when chip selected by IC202.

Decision to Tilt
When the RF voltage has dropped below the threshold level stored in

Flash ROM IC205, IC202 instructs the tilt motor to rotate in one direction.
The RF level is sampled afterwards. If it is still low, the tilt motor is rotated
in the other direction and the RF voltage is sampled again. The process
is repeated until the RF fluctuations have reached a minimum level.

Power OFF

At power off, the tilt motor drops the laser platform to the lowest position
just before the power supply is shut off. At this laser position the incline
gear is at one of the lower stop position. At the next power ON, the incline
gear will be stepped to the higher stop position, bringing the laser plat­form to maximum before going to mid position.

Clicking Noises
If the DVD player was unplugged, the incline gear will not be returned to

its lower stop position and will remain at its middle playback position.
When the unit is powered ON again, the incline gear will be instructed to
step a full rotation from one stop to the other.

Since the incline gear was as mid position instead of at the lower stop
position, the incline gear has less to travel and will prematurely reach its
mechanical stop. You will hear clocking noises as the tilt motor gears slip.
To avoid these clicking noises, shut off the unit first and wait for the red
standby light to come on before unplugging the set. This will allow the tilt
motor to return the incline gear to its stop position.

Manually Driving the Tilt Motor

The tilt motor can be driven in either direction using the unit’s test mode.
This checks the gears and communications between IC202, IC601 and
IC701. It does not check the tilt motor operation during playback, which
uses the RF input to IC701/pin 67.

IC202
SYSTEM
CONTROL
MB91101
PFV

HD0

-15

SERIAL
BUS

X201

12.5MHzx

9291

CS1

CS4

HA0-5,
17-19

10

7

7

CLK

5

RD

22

WE

24

INT1

94

INT3

88

ADDRESS

141
142

142
135
145

143

156

HA0-5,

155

17-19

IC201
EEPROM
AK6440AF

CS1
CS4

IC601
HGA
CXD8788Q

SDCPS
SDPWR

SDPRD

SDPIT

HD0

-15

PARALLEL
BUS

93

59

118

116
117

INTERRUPT

115

XDRV MUTE

CS

WRITE

R

128

ADDRESS

DATADATA

3
2
1

108

HCS

HWR
HRD

HINT

HD0-7

1010

EA0-1

TK51 BD.

IC701
SERVO DSP
CXD8791Q

GI02
GI01

ADC2

2.4V

PI

IC001
DVD/CD RF AMP

SSI33P3722

OPTICAL DEVICE

X001
27MHz

48
49

67

PI

0.1Vp-p - DVD

0.2Vp-p - cd

CN002/

12

CN003

7

29

9-12

9

10

R843
R842

1716

Q801

2.5V REF
IC803/7

R841

TLTB

TLTA

A-D

D805

3V

24

IN3+

27

IN4+

26

IN4-

23

IN3-

1

18

13

AM

D806

20

MUTE

IC801 1/3
TILT MOTOR
DRIVER
BA5981FP

ITA,B

1815-

16

17

12

11

B

432

15

10

TO
IC801/9

CN003/
CN004

CN002CN001

TILT
MOTOR

TILT SERVO

72

6 22 9910DVD02 1151

73

Audio/Video Processing Block

The RF / eye pattern signal is processed by several blocks to recover the
audio and video signal that is output the rear panel.

Optical Device

The optical device contains an active amplifier and matrix to produce a
low noise RF or eye pattern signal from the A-H detector’s signals. The
RF and A-H detector signals are all input to the RF amplifier IC001.

RF Amplifier IC001

The RF signal is amplified when small, and limited when large, to equalize
the eye pattern signal that is applied to the next A/V stage. The A-H
detector signals are matrixed in the RF amplifier to produce servo signals
like focus error (FE), tracking error (TE), track zero crossing (TZC) and PI
and Mirror signals for disc identification. These signals go to the servo IC.

ARP2 IC303

The Advanced RF Processor (ARP2) IC303 receives the analog eye pat­tern data and first converts it into a digital waveform by “slicing” it across
the middle. A voltage above the middle becomes a HIGH output and a
voltage below becomes a LOW voltage. The HIGH and LOW voltage
begin their digital journey within IC303. To support the digital signal a
clock is made from the input signal.

How successful the data locks to the internal PLL to make this clock can
be monitored at the JITTER pin 57 of IC303. A low voltage proves a lock.
This means the servos are OK and the signal processing is OK to this
point. A high voltage means the input eye pattern should be examined
again. A clear (no noise) signal means the servos are OK and the disc
signal is incorrect or IC303 is not able to lock onto the input signal (IC303
or its support parts are defective).

Additional signal processing within IC303 unscrambles the digital data
and channels the CD and DVD data into separate output ports. Both
outputs are fed to separate A/V Decoder IC401 inputs.

A/V Decoder IC401

The CD and DVD input signals undergo separate processing. The CD
audio is virtually untouched and leaves the IC in the audio processing
path to IC501.

The DVD video signal is MPEG decompressed using two external SDRAM
ICs (not shown) for momentary storage during the processing. The
subpicture (subtitle and DVD disc menu) pieces of data are loaded into
memory and when called for, added into the main picture. The digital
information is returned to analog form by the internal D/A converter. The
DVD player’s menu is added as an on screen display (OSD) just before
the analog video leaves IC401.

The DVD audio signal is also MPEG decompressed and the PCM is ex­tracted to take the route out of IC401 through IC501 and IC902 for the
analog audio processing. Dolby digital AC-3 decompression takes place
in this IC401 using the two external SDRAMs (not shown) that are also
used for video decompression. IC401 first recognizes the 5.1 channel
AC-3 or DTS data and informs Syscon IC202.

Audio DSP IC501

IC501 Audio Processing

CD DVD DVD with AC-3

Rear channel delay
(Digital Cinema
Sound / VES)

Dolby Prologic
Decoding

Dolby Surround A dds DTS flag to the

Rear channel delay
(Digital Cinema
Sound / VES)

Dolby Prologic
Decoding

digital output

Pass through of the

5.1 channel AC-3
signal

Downmixing of 5.1
channel AC-3 to 2
channels.

Signal balancing

Test tone generation

The outputs are digital signals to the rear panel coax and optical ports and
digital signals to the D/A converters IC902, IC905-7.

D/A Converters

IC902 receives the digital signals for the analog L/R channels. The re­mainder of the converters, IC905-7, is used for the 5.1 channel digital
conversion to analog signals.

OPTICAL

DEVICE

RF

A - H

RF AMP

IC001

RF

EYE
PATTERN

ARP2

IC303

57

DVD

CD

A/V

DECODER

IC401

VIDEO
OUTPUT

AUDIO

DSP

IC501

SERVO IC

D/A CONV

IC902
IC905
IC906
IC907

JITTER

A/V PROCESS BLOCKS

AUDIO

DIGITAL
AUDIO
(COAX/DIG)

L/R (ANALOG)
L/R MAIN (5.1)

L/R (REAR 5.1)
C/W (5.1)

AUDIO
OUTPUT

28DVD02 6 22 99

74

75

A/V Processing

There are three major ICs in the combined A/V processing chain; two
buffers in the following video chain and nine ICs in the final audio chain:

A/V Processing ICs

Combined A/V Video Audio
RF Amp IC001 Video Buffers IC303 DSP IC501
ARP2 IC303 Video Buffers IC321 2Ch D/A Conv. IC902
A/V Decoder Front Ch D/A Conv. IC902

Rear Ch D/A Conv. IC902
Center/Woofer D/A

Converter IC907
Amplifiers IC431, IC502,

IC541 and IC571

Once the servos begin operation, there is RF output from the optical de­vice in the base unit. These ICs process the RF output:

RF Amp IC001

Purpose:
Amplifies and matrixes the A-D input signals from the optical assembly to

produce RF, FE, PI outputs. Matrixes the E-H input signals to produce
TE (and TZC).

Outputs:

· RF signal for A/V and spindle motor processing

· FE,TE, PI signals for servo control

ARP2 IC303

Purpose:

· Asymmetrical correction – Active circuit for AC coupling the input RF
signal. Shapes sine input signal into a square wave.

· Sync clock extraction – Bit clock (PLL) made from the disc data.

· EFM and De-Interleaving – First level of descrambling the data pieces

using external memory IC304 (Reed – Solomon Code).

Outputs:

DVD Output Signals from IC303

Name From IC Purpose When present

SD 0-7
disc
data

XSHD IC303/pin 93 0.25usec low going pulse

IC303/pins
97, 98, 100-

105.

A/V disc data DVD PB only

DVD PB only
to mark the beginning of
the DVD data

XSRQ IC401/pin 51 Us ed as a busy line DVD PB only
XSAK IC303/pin 95 Data Acknowledgement DVD PB only
SDCK IC303/pin 91 Bit clock Power on

CD Output Signals from IC303

Name From IC303 Purpose When present
Data Pin 107 CD data Power on
D Out (data) Pin 110 CD data CD PB only
B Clk Pin 108 Bit clock Power on
L/R Clock Pin 109 Left/right clock Power on

The following waveforms show the two CD data outputs (Ch 1 and Ch 3)
from ARP2 IC303 accompanied by the left / right clock (Ch 2).

Channel 1 CD Data IC303/pin 107 5Vp-p
Channel 2 L/R Clock IC303/pin 109 5Vp-p
Channel 3 CD D Out (data) IC303/pin 110 5Vp-p
Time base 2usec/div.

PM3394, FLUKE & PHILIPS

ch1: freq= 927kHz

ch1

T

ch2

1

ch3

2

3

CH1!5.00 V=

CH2!5.00 V=

CH3!5.00 V= ALT MTB2.00us- 2.00dv ch1+

CD Data Ou tput Waveforms – CD PB

Name Location Voltage/div

OPTICAL

DEVICE

KHM220

-AAA

RF

A-D

E-H

CN001

7

16
17

9

10
18

8

15

11

MB85 BD.

A-D (DC)

A-D
(AC)

TK51 BD.

3.3V

DVD

CD

20
32

40

17

19

107
108

109

110

97,98

7

RF IN1

RF IN2

CD DATA

BCLK

LRCK
CD OUT

105100

IC303
ARP2
CXD8784R

XSHD

SDCK

5V

C019R022

1

IC001

9-12

RF AMP
SSI33P

5-8

3722

REG
WJM2370U33

60

VPA
VPB

18

16,40--13

FE,TE,PI TO
SERVO IC701
MB85 BD.

SI
GO

CN003/
CN002

A/V DATA

5V

RF

1.2Vp-p
EYE

PATTERN

C001

21754

C002

SD0-7

4

IC302

5

XRAJ

XEAJ

XMWR

XOE

XSRQ

695445252312

151

150

148

152

XSAK

95949391

MDPO+
MDSO TO
SPINDLE

49

DRIVER

52

IC802

DATA
00-15

ADDRESS

A0-9

RAS

UCAS
LCAS

WE

OE

BUS

50
51
49
47

38-46

CD DATA
TO A/V DECODER
IC401

3.3V

2561

IC304
DRAM
KM416-

V1200
18
34

35
17

33

PARALLEL BUS
TO FLASH ROM IC205,
SYSCON IC202

DVD DATA
TO
A/V DECODER
IC401

A/V PROCESSING

76

6 22 9926DVD02 1172

77

These waveforms were taken with the player turned on and no disc in­serted. They show that the CD DOut data signal (ch 2) from IC303/pin
110 is fixed to half of the bit clock frequency (ch 1).

CD Output – Power ON only (no PB)

Channel 1 Bit Clock IC303/pin 108 5Vp-p
Channel 2 CD DO ut (data) IC303/pin 110 5Vp-p
Time base 0.25usec/div.

PM3394, FLUKE & PHILIPS

ch2:dc = 1.84 V, rms = 2.47 V

ch1

pkpk= 4.25 V, freq= 1.41MHz

T

ch2

1

ch3

2

3

CH1!5.00 V=

CH2!5.00 V=

CH3!5.00 V= ALT MTB 250ns- 2.00dv ch1+

Name Location Voltage/div

A/V Decoder IC401

Purpose

Video

· MPEG decompression using the external IC402 and IC403 memo­ries.

· Crops the 16x9 image for a 4x3 TV picture (software dependent).

· Communicates with IC202 with servo control changes to get info at

different parts of the disc.

· On screen display graphics.

· D/A Converter (analog video output).

· Generates MacroVision copyguard signals when instructed.

Audio

Flash ROM IC205

Contains fixed data about how this DVD player should store, retrieve and
process information. SYSCON IC202 processes this information. Some
of the information processed is as follows::

· Some variables in the MEPEG Video and AC-3 Audio processing

· What ICs to check during start up

· Stores the power ON DVD Sony logo

· Test mode overall operation (servo data is in IC201)

· Color bars used in the test mode (main picture)

· Menu languages and characters

· MPEG audio decompression

· Dolby Digital AC-3 decompression using external SRAM IC402 / IC403

Outputs:

· 6 Analog Video channel Outputs (Y, B-Y, R-Y, Composite, Y, C)

· 6 channels of Dolby Digital (AC-3) audio with clock signal support.

DVD
DATA
FROM
IC303

XSAK

XSRQ

XSHD

SDCK

A/V DATA BUS

CD
AUDIO
DATA
FROM
IC303

IC402,
IC403
DRAMS
KM16S

1020CT

CD OUT
CD L/RCLK

B CLK

CD DATA

L/RCK

BCK

A CH 120
A CH 340
A CH 560

97

ICLK

47
49

50
58

59

62

105100

51

57

65
61

98

SDCK
XSHD
XSRQ

XSAK

Y

B-Y
R-Y
COMP

Y
C

AUDIO PROCESS
TO IC501,IC902, IC905-7

AU212 BD.

CD IN2

29
32

CD LRK

31

CD BCK

30

CD IN1

0

121

1

120

25
26

21
22
23

IS MAX

IREQOW

IVRLIW

IC401
A/V DECODER
CXD1930Q

VIDEO PROCESS

COMPONENT OUTPUT

2

44
62

26
281
263

245

2
4
7

C
S VIDEO
OUT 1,2

R-YB-YY

101315

IC303
BUFFERS
BA7660F

174

V
MUTE

IC201/11

1

IC321
BUFFERS
BA7660F

131510

Y

VIDEO 1,2
OUT JACKS

6 29 9927DVD02 1173

78

79

,

Audio DSP IC501

Purpose:

· Down-mixing of six channel AC-3 into two (L/R) channels

· Dolby Prologic decoding

· Audio enhancements when there is no AC-3 received (this rear chan-

nel delay circuitry is only found in some models):

q Digital Cinema Soundâ gives you the illusion of various spatial room

environments

q Virtual Enhanced Surround (VES) for 3D sound with two speakers
q Enhanced Surround for a greater sense of presence from the normal

Dolby Prologic sound

· Digital coax and optical output

· Rear channel delay

· Front/rear level balancing

· Test tone generation

Outputs:

DSP IC501 Output Signals

Name From

IC501
L/R Clock Pin 10 48kHz or 44.1kHz clk * Power On
Bit Clock Pin 9 2.3MHz or 2.1MHz clk. * Power On
CH78O Pin 11 Data for analog channels Audio PB
CH12O Pin 15 Data for 5.1 front channels Audio PB
CH34O Pin 14 Data for 5.1 rear channels When AC-3

CH56O Pin 12

DO Pin 16 Digital Output Power On

Data for 5.1 center and
woofer channels

* Depending upon the last disc detected. First frequency is for DVD.

Purpose When present

source is input
When AC-3

source is input

D/A Converters IC902, IC905 – IC907

Purpose
Converts the digital input to analog output when received.
Support Signals
All the D/A IC support signals go to the same pins of these ICs because

they are the same number IC (CXD8799).

D/A Converter Required Signals

Name

Vcc 8, 9 3.3V (not shown) At power

Audio
Data

L/R Clock 1 44.1kHz = CD detected

Bit Clock 3 2,116MHz = CD detected

Master
Clock
(Xtal)

Output 13 & 16 2Vp-p (analog audio) During PB
Chip

Select
Communi

cations
Clock

Communi
cations
Data

Location

pin #

2Data

3Vp-p

48.kHz = DVD detected
3Vp-p

2,304MHz = DVD detected
3Vp-p

5 33.868MHz = CD detected

36.864MHz = DVD detected
4Vp-p

28 10usec, 3Vp-p, low pulse. At play,

27 4 gr oups of 8 low going pulses. During PB

26 20usec positive going data

pulses. Data is used for reset
mute, and gain/balance.

H= pause or stop.

Signal

When

Present

ON
During PB

At power
ON

At power
ON

At power
ON

pause, stop.

During PB

L/R CK

FROM

IC401/25

B CLK
FROM
IC401/26

A CH 120
A CH 340
A CH 560
FROM
IC401/21,23

CD OUT
CD L/R
B CK
CD DATA

49

IC501

47

AUDIO DSP
CXD1901R

52
51
50

CD DO

25

CD LR

28

27

CD BK

26

CD SO

CH780

CH120

CH340

CH560

109

DO

16

11

15

14

12

D IN

D IN

D IN

D IN

L/R CLK

B CK

IC902

2

2 CH D/A
CXD8799

IC905
FRONT D/A

2

CXD8799

IC906
REAR D/A

2

CXD8799

IC907

2

CENTER
WOOFER D/A
CXD8799

16
13

13

16
13

16

13

16

CN005/
CN301

14

15

1811
1613

21

8
623

3

11

95

77
59

3
5

3

5

3
5

3
5

AV212 BD.MB85 BD.

IC431
AMP
BA4558

IC431
AMP
BA4558

IC431
AMP
BA4558

IC431
AMP
BA4558

1
7

5.1 CH OUTPUTS

1
7

1
7

1
7

DIGITAL
OUTPUT TO:
COAX JACK
OPTICAL PORT

AUDIO

L

OUT

R

1,2

L

FRONT

R

L

REAR

R

CENTER

L

WOOFER

R

CN007/

BCK INL/R IN

CN302

31

AUDIO PROCESSING

80

5 25 9917DVD02 1158

81

Test Mode

The test mode allows you to diagnosis problems and make adjustments
using the remote commander and TV monitor. The instructions and re­sults are given on the TV screen (OSD).

Test Mode Access

1. Plug in the DVD player,

2. Select DVD on the remote,

3. Aim the remote at the DVD player; and

4. Press the TITLE, CLEAR and POWER buttons one after another.
The red standby light changes to green and the blue Dolby Digital light will
come on. The display will momentarily flash DIAG START as IC202 re­trieves the program from the flash ROM IC205.

Exit

To leave the test mode, turn the power off.

Tests

The initial test mode menu shows seven options. Selecting a number
enters that option level. You can navigate through each menu of that
level using the remote’s PREV or NEXT keys. The RETURN key brings
you to the previous level.

0. Syscon Diagnosis

This is a communications test between IC202 and IC on the parallel bus
and is similar to the quicker checks that occur during power ON. If the
unit powers on, it will usually pass this check.

Writing information in and reading the same information checks most ICs.
When the two match, the IC is deemed good. This testing occurs when
the TV screen changes to a blue background. The IC is good if the origi­nal menu reappears.

In this check, the remainder of the video IC401 is tested by producing a
video patterns to confirm operation. The audio IC501 is instructed to
produce individual audio tones to each channel.

In checking the A/V Decoder (CDX1930 IC401), the OSD words
“CHG_COLCON” mean this part of the IC is OK.

1. Drive Auto Adjustment

Automatically plays the disc and reloads new data into EEProm IC201.
This is used when memory IC201 or the optical assembly is replaced.
Test discs are required for these adjustments. The Super Audio CD
(SACD) procedure is in this generic test program, but this DVD player
cannot play SACDs.

2. Drive Manual Adjustment

Servo adjustments stored in EEProm IC201 can be altered manually. This
operation is useful if you want to determine if the player can identify the
disc type as the first step in playing the disc.

Servo Usage - Automatic Disc Identification

Servos used Servos NOT used

Sled moves laser
outward slightly

Laser Tilt motor resets platform to mid position at

Focus Tracking
Spindle motor kick Spindle motor servo (lock)

Within the Manual Adjustment is a Servo Control subsection that permits
you to turn on each servo separately for observation. You can also play
the disc and observe an eye pattern when all servos are on (sled does not
come on in PB).

Sled moves laser assembly to home position
at Manual Adj. entry (pressing the # 2 button)

Manual Adj. entry (pressing the # 2 button)

3. Mechanical Aging

This mode cycles the tray in, and then momentary plays the disc for iden­tification. The number of cycles and the disc type found is displayed on
the TV screen.

4. Emergency History

This is the most valuable diagnostic information in the test mode. The
last failure is recorded in EEProm IC201 and displayed on the TV. Ten
codes may all pertain to one failure that affects various parts of the DVD
circuitry that is monitored. An emergency code list is found in the service
manual.

### Syscon Diagnosis ###

Check Menu

### Mecha Aging ###

0. Quit

1. All

0

1

2. Version

3. Peripheral

4. Servo

5. Supply

6. AV Decoder

7. Video

8. Audio

## Drive Auto Adjustment ##

0. ALL

1. DVD-SL

2. CD

3. DVD-DL

4. SACD

## Drive Manual Operation ##

1. Disc Type

2. Servo Control

3. Track/Layer Jump

2

4. Manual Adjustment

5. Auto Adjustment

6. Memory Check

0. Disc Check Memory

Adjustment Menu

Exit: RETURN

Operation Menu

Exit: RETURN

TEST MODE ACCESS
With the unit in standby, press
these 3 buttons on the remote at
the same time:

• TITLE

• CLEAR

• POWER

Test Mode Menu

0. Syscon Diagnosis

1. Drive Audo Adjustment

2. Drive Manual Operation

3. Mecha Aging

4. Emergency History

5. Version Information

6. Video Level Adjustment
Exit: Power Key

_
Model: DPX1230UC
Revision: 1.500

On Screen Display

Press OPEN key

Abort: STOP key

### EMG. History ###

Laser Hours CD 0h

DVD 2h

1. 82 05 01 06 00 61 00 00
00 00 00 00 00 00 00 00

2. 63 68 01 04 04 00 03 3F
68 00 03 00 00 FE FF 00

Select: 1 - 9 Scroll: UP/Down
(1: Last EMG.) Exit: Return

## Version Information ##

IF con. Ver. 1.000 (D6FD)

Group 02

SYScon. Ver. 1.500 (DOB5)

Model 20

Region 01
Servo DSP Ver. 1.000
Exit: RETURN

3

4

5

82

83

Clearing Emergency Codes

· Press TITLE, then CLEAR while viewing the emergency history screen.

Clearing Laser Hours (after replacing the laser)

· Press DISPLAY, then CLEAR while viewing the emergency history
screen.

6. Video Level Adjustment

RV401 on the MB85 Bd. is adjusted for 1Vp-p video output.

Additional Test Mode

There is an additional test that permits the Interface IC201 to power up
the DVD unit and test the front panel display. This individual operation of
the Interface IC201 is independent of the initial start up communications
with Syscon IC202.

Access:
Plug in the DVD player
Press and hold the front panel keys:

RETURN
STOP

Self-Diagnostic Function (Customer Error Codes)

In the owner’s manual there are two codes listed that can appear on the
front panel display when there is a problem:

C13 = The disc is dirty (This really means the RF eye pattern is fluctuating

or the eye pattern is below normal amplitude.

C31 = The disc is not correctly inserted. (The disc was put in upside

down.)

Exx = To prevent the player from malfunctioning, the self-diagnostics has

stopped the unit. Please give the xx number to your service tech­nician.

The xx refers to the error codes listed in the (DVP-S530D) DVD service

manual, on page 6-4.

Press this remote control key:

MENU

Activity
All lights on the front panel will turn on. After a few moments, the front

panel display will cycle through all the segments. You can interrupt the
cycle to test an input button by just pressing the button on the front panel
or remote. The button pressed will be identified on the display.

NOTES

84

85

,

Troubleshooting

When the model DVP-S530 DVD player is first plugged in and turned on, several things occur before “NO DISC” is displayed on the front panel. One
operation is performed after the next until it reaches the end of the chain. A failure will prevent it from reaching the end and often a side trip is taken to
protect the unit by shutting down. Finding out where in the chain the unit has stopped will help locate the failure. Below is a general description of the
start-up operations followed by problems and answers. Use the information below as a troubleshooting guide to remain on track throughout your
testing.

Operations Details found in:

1. DVD Player is plugged in and the power button is pressed. Power Control section of the training book

2. Communications between Interface IC201 and Syscon IC202 on
the serial bus.

3. Front panel blue Digital Dolby indicator lights. Power Control section

4. Communications with other IC s on the parallel bus. Parallel Data Communications section

5. SONY DVD appears on the fluorescent display. Power Control section

6. Sensors are checked and the Transport is returned to the initial
state (tray is closed, sled goes to home position).

7. Sony DVD logo appears on the monitor (OSD). See no logo problem listed below.

8. Search for a disc is initiated using the focus search operation and
other servos

9. NO DISC is displayed in the fluorescent display. Serial Data Communications / Power Contr ol section

GENERAL PROBLEMS AND TROUBLESHOOTING GUIDE

No Power ON

1. Unplug unit and press the POWER button to discharge the power
supply.

2. Watch the front panel Dolby Digital indicator while plugging the unit
into AC. If there is Interface IC201 to Syscon IC202 serial communi­cations, the blue indicator will light momentarily. See the Power Con­trol section for details.
To check the Interface IC201 alone (without IC202), use the proce­dure in the test mode section of this book (last paragraphs).

Power Control section

Mechanism section

Use the Test Mode section in the service manual to
test the Laser
Then see the problem servo section.

3. Press the power ON button. If the unit does not remain ON, there is a
loss of communication between Syscon IC202 and a slave IC or the
servo IC701 failed to reset the mechanism.
Communications occur when Syscon IC202 Chip Selects several ICs,
sends data and waits for an interrupt reply from each. Use the scope
to look for a low interrupt reply pulse at these ICs highlighted (in bold)
while repeatedly pressing the power button to reinitiate the sequence:

Focus, Spindle and Tracking servos.

Request Pulses to Syscon IC202 for Service

Interrupt pulse

From

ARP2 IC303/pin
86 (Wait)

A/V Decoder
IC401/pin 198
(wait)

A/V Decoder
IC401/pin 196
(interrupt)

Interface
IC201/pin 78
(CN006/pin 2)

ARP2 IC303/pin
83 (Interrupt)

Servo IC701/pin
128 (Interrupt)

EEProm
IC201/pin 1
(busy)

DSP IC501/pin 55
(Int errupt 0)

DSP IC501/pin 56
(Int errupt 1)

Through IC601 To

In pin 108 (arpwt)
Out pin 157 (wait)
In pin 72 (avdwt)
Out pin 157 (wait)

Direct IC202/pin 95

In pin 22 (interrupt)
Out pin 155 (Interrupt 3)

In pin 107 (interrupt)
Out pin 156 (Interrupt 1)
In pin 107 (interrupt)
Out pin 156 (Interrupt 1)
In pin 25
Out pin 155 (Interrupt 3)

IN pin 29
Out pin 155 (Interrupt 3)
IN pin 30
Out pin 155 (Interrupt 3)

IC202/pin 19
(Ready)

(interrupt)

IC202/pin 88
(interrupt)

IC202/pin 94
(interrupt)

IC202/pin 88
(interrupt)

4. After the brief communications above, the servo IC701 must initialize
the mechanism by closing the tray and moving the sled to home posi­tion. When completed, IC701 replies to Syscon IC202. If no reply is
received within approximately 2 seconds of powering ON, IC202 in­structs Interface IC201 to power down (set OFF). For details, see the
Mechanism section, Tray Motor Drive section and the Initial Sled Drive
section of this training book.

No DVD OSD logo

The DVD initial OSD power ON logo is stored in Flash ROM IC205. This
information takes the following path to become video that outputs the
AU212 board:

1. Flash ROM IC205 (storage)

2. Syscon IC202 (extraction and processing)

3. ARP2 IC303 (pass through)

4. A/V Decoder IC401 (sub-picture generation)

5. Video Buffers on the AU212 board

In the test mode (Syscon Diagnosis/A/V Decoder test), the A/V Decoder
can generate a main picture (color bar) or a sub picture (“CHG_COLCON”)
from the flash ROM data. Unfortunately they take the same path as the
logo, finally separating inside the A/V decoder IC401. Therefore if the
logo, test bars or test sub picture does not appear, the problem may be
the storage area in Flash ROM IC205. If none appear, the path from
Flash ROM to A/V Decoder IC401 is broken.

No DVD PB (CD PB OK)

1. Use the test mode to perform the DVD auto adjustments using the
DVD test disc.

2. Use the test mode to examine the OSD emergency code entries for
failures. The emergency code list description is in the DVP-S330/
S530/S550/S705 service manual on page 6-10E. The front panel
customer code errors are preceded by a C and listed on page 6-4 of
the manual.

3. Use the test mode to manually play the DVD disc by activating servos
1-6 individually.

4. The minimum (marginal) eye pattern amplitude is 0.8Vp-p @ CN012/
pin 1. Clean lens or replace laser. Follow eye pattern into ARP2

86

87

IC303/pin 17 (1.4Vp-p) which should produce less than 0.5Vdc at
IC303/pin 57 if the PLL clock is able to lock to the data. Insufficient
IC303/pin 17 input level will prevent a lock and so will a defective
IC303.

5. This DVD player uses the laser and focus servos to identify the DVD.
One may not be working. From the test mode, manually turn on the
laser and focus search servos (Drive Manual Operation/Servo Con­trol) for observation.

· Laser test – using a light meter measure the laser light (never look
directly at the laser) and measure voltage across R006 (laser cur­rent). 1Vdc or more across R006 means the laser is at the end of life.
The light measurement is quick but not a definitive test. The current
measurement is better.

· Focus search test – Scope FE (test connector CN012/pin 3) for 1.5Vp­p minimum sine wave used for disc layer ID. Scope MIRROR output
at CN002/pin 16 for 3Vp-p pulses during the search. The Mirror sig­nal is an amplified the PI signal. Both come from RF Amplifier IC001.

No DVD DL PB (other discs PB OK)

1. Perform the test mode’s “Drive Auto Adjustments” using a Single, and
then a Dual layer disc, to reload data into the EEProm IC201.

2. Check the operation of the tilt circuit in the test mode by seeing if the
tilt incline gear moves manually (Test mode/Drive Manual Operation/
Manual Adj/Tilt Position).

3. A single layer DVD Eye pattern’s minimum level is 0.8Vp-p at the MB­85 board test connector CN012/pin 1. The laser level is affected by
dirt/oil in the lens and the tilt circuit. A new laser will output approxi­mately 1.2Vp-p.

IC303/pin 57 if PLL clock is locked (3V= no lock, 0V = defective IC or
external short).

6. This DVD player uses the laser and focus servos to identify the CD.
One servo may not be working properly. From the test mode, manu­ally turn on the laser and focus search servos (Drive Manual Opera­tion/Servo Control) for observation.

· Laser test – Using a light meter, measure the laser light (never look
directly at the laser) and measure the voltage across R006 (laser cur­rent). 1Vdc or more across R006 means the laser is at the end of its
life. The light measurement is quick, but is not a definitive test. The
current measurement is better.

· Focus search test – Scope FE (test connector CN012/pin 3) for 1.5Vp­p minimum sine wave used for disc layer ID. Scope MIRROR output
at CN002/pin 16 for 3Vp-p pulses during the search. The Mirror sig­nal is an amplified the PI signal. Both come from RF Amplifier IC001.

No Disc PB

1. Use the test mode to perform the CD auto adjustments.

2. Use the test mode to examine the emergency code entry for failures.

3. Use the test mode to manually PB the CD disc by activating servos 1­6 individually to see if one is faulty.

4. The minimum (marginal) eye pattern amplitude is .8Vp-p @ CN012/
pin 1. Clean lens or replace laser. Follow eye pattern into ARP2
IC303/pin 19 (1.4Vp-p) which should produce less than 0.6Vdc at

5

SEL Service Company

A Division of Sony Electronics Inc.

1 Sony Drive

Park Ridge, New Jersey 07656

DVD020699

Printed in U.S.A.