LG GCE-8080N Service Manual

INTRODUCTION

FEATURES

1. General

1) Enhanced IDE interface.

2) Ultra Slim Type CD-RW Drive (Height : 12.7 mm)

3) 2 Mbytes buffer memory.

4) Exact Link Function Support.

5) 3 Way eject support (Software, Open button, Emergency eject).

6) Supports Power saving mode and Sleep mode.

7) Vertical and Horizontal Operation.

2. Supported disc formats

1) Reads and writes data in each CD-ROM, CD-ROMXA, CD-Text, Video CD, and CD-EXTRA

2) Reads data in Photo CD (Single and Multi session).

3) Reads and writes standard CD-DA.

4) Reads and writes CD-R discs conforming to “Orange Book Part 2”.

5) Reads and writes CD-RW discs conforming to “Orange Book Parts 3”.

3. Supported write method

1) Disc at once, Session at once, Track at once (TAO), Variable packet, Fixed packet, and Multi-session.

4. Performance

1) Random 140 ms average access time.

2) CD-R record speed : 2x, 4x, 8x

3) CD-RW record speed : 2x, 4x, 8x

4) CD-ROM : Max 3,600 KB/sec(Max 24x) Sustained Transfer rate.

5) Supports real time error correction and real time layered error correction at each speeds.

6) Supports CD-R write operation at double speed, quadruple speed, eighth speed.

7) Supports CD-RW write operation at double speed , quadruple speed and eighth speed.

8) PIO Mode 4, Multi DMA Mode 2 Support.

9) Multimedia MPC-3 Spec compliant

10) Support CD-TEXT read and Write.

11) Support Exact Link function

5. Audio

1) Outputs 16 bit digital data over ATA interface.

2) 4 Times Digital Filter for CD Audio

3) Software Volume Control

This service manual provides a variety of service

information.

It contains the mechanical structure of the CDR/RW Drive and the electronic circuits in schematic form. This CD-R/RW Drive was manufactured and assembled under our strict quality control standards and meets or exceeds industry specifications and standards.

This CD-R/RW drive is an internal slim drive unit designed for use with IBM PC, HP Vectra, or

compatible slim notebook computer. It can write as much as 700 Mbytes of digital data into CD-R disc, and can read as much as 700 Mbytes of digital data stored in a CD-ROM, CD-R and CD-RW disc.

This CD-R/RW Drive can easily meet the upcoming MPC level 3 specification, and its Enhanced Intelligent Device Electronics (E-IDE) and ATAPI interface allows Plug and play integration in the majority of today’s PCs without the need of an additional interface card.

The differences of CD-R/CD-RW discs and General CD-ROM

1. Recording Layer

Recordable CD has a wobbled pre-groove on the surface of disc for laser beam to follow track.

2. Disc Specification

Read-only Disc

CD-R and CD-RW Disc

3~11T

1.6um

0.4~0.5 um

(Pit)Groove

Land

Track pitch(p)

Radial Direction

Groove

Land

Radial Error Signal

The Groove wobble

Average center

Actual center

CD-ROM CD-R CD-RW

Standard Yellow Book Orange Book II Orange Book III

Record Not available Write once Re-writable

I 11/Itop

> 0.6 > 0.6 0.55 > M11> 0.70

(HF Modulation)

Write Laser Power(mW) 10-30 mW 6-25 mW

Read Laser Power(mW) < 0.5 mW < 0.7 mW < 1.0 mW

Jitter < 35 nsec < 35 nsec < 35 nsec

Reflectivity (R

top) 70 % 65 % 15 % ~ 25 %

CD-ROM (READ-ONLY DISC)

a=30nm

3. Disc Materials

1) CD-ROM disc

Laser Beam

Groove

Substrate (Polycarbonate)

Organic Dye Layer

Reflective Layer

Protective Layer

Label Printing

2) CD-R disc

Pigment Reflective Layer Color

Phtalocyanine Gold/Silver Yellow/White

Cyanine Gold/Silver Dark Green/Bright Green

Azo Gold/Silver Dark Blue

• It is composed of Silver _ colored aluminum plate and Reflective layer.

• Groove (Pit) of aluminum plate make a track.

• Laser wavelength : 780 nm, Laser Power (Read): 0.5mW

• Signal is detected by the

difference of reflective beam intensity between “pit” and

“Land” on the disc.

• It is so-called WORM (Write Once Read Many) CD.

• It is composed of polycarbonate layer, Organic dye layer, Reflective layer, and Protective

layer.Gold/Silver Reflective layer is used to enhance the reflectivity

• According to the kinds of Organic dye layer, it is divided by Green CD, Gold CD, Blue CD.

• Laser Wavelength : 780 nm, Laser Power (read) : 0.7 mW

• Recording Power : 4x(10~15mW), 8x(14~20mW), 12x(15~30mW).

• When some part of dye layer is exposed to laser heat, it’s color changs black.Therefore, writing and

reading is enabled by the difference of reflectivity between changed part and unchanged part.

• Polycarbonate layer has Pre_Groove which make a Track.

Laser Beam

Pit

Substrate (Polycarbonate)

Reflective Layer

Protective Layer

Label Printing

33)) CCDD--RRWW DDiisscc

Reading process of Optical Disc

Laser Beam

Groove

Substrate (Polycarbonate)

Reflective Layer

Dielectric Layer(TL)

Dielectric Layer(UL)

Protective Layer

Label Printing

• It is composed of polycarbonate layer, alloy(silver, arsenic) layer, aluminum reflectivity layer, protective layer.

• An crystalized alloy layer is transformed into noncrystalized by the laser heat. Therefore, writing and reading

is enabled by the difference of reflectivity.

• It is possible to overwrite about 1000 times.

• Laser Wavelength : 780 nm, Laser Power (Read) : 1.0mW

• Recording Power : Erase (4~12mW), Write (6~25mW)

• When disc rewriting, new data is overwritten previously recorded data.

• Polycarbonate layer has a Pre-Groove which make a track.

Lens

Beam Spot

Focusing Lens

Laser Spot at Constant Read Intensity

Reflected Light Signal

Laser Spot Position (Time)

Previously Recorded Marks

Groove Land Mirror

top

Numerical aperture: NA=nsinθ,

n: Refractive index

Focus depth : H =

λ/

laser spot diameter :

D = λ/NA

5. Writing Process of CD-R Disc

a b c d e f g

Incident Laser Powe r

(Read)

(Write)

Laser Spot Position (Time)

a b c d e f g

Laser Spot Position (Time)

Laser Spot

Recorded Mark

Reflected Light Signal

Below "ORP"– Mark Too Short

At Optimum Record Power ("ORP")

Above "ORP" – Mark Too Long

Time

6. Writing process of CD-RW Disc

Write Power

Erase Power

Read Power

Groove

Crystal

Amorphous

Recorded state

(lower reflectivity)

Melting/

quenching

Heating/

gradual cooling

Crystal phase

Erased state

(higher reflectivity)

7. Organization of the PCA, PMA and Lead-in Area

1) Layout of CD-ROM disc

Center hole Clamping and Label Area Information Area

Lead-in Area

Diameter 15 mm

Diameter 46 mm

Diameter 120 mm

Program Area

Read Only Disc

Lead-out Area

Program Area Lead-out Area

Center hole

Clamping and Label Area

Information Area

PCA PMA

Test Area Count Area

Diameter 15 mm

Diameter 45 mm

Diameter 120 mm

Unrecorded Disc

Tsl-00:35:65 Tsl-00:15:05

Tsl-00:13:25

Tsl

99:59:74 00:00:00

in out

Test Area : for performing OPC procedures.

Count Area : to find the usable area immediately in T.A

Tsl : start time of the Lead-in Area, as encoded in ATIP

PMA : Program Memory Area

Disc Center

2) Layout of CD-R/RW disc

8. Function of PCA and PMA area

1) PCA (Power Calibration Area)

• PCA area is used to determine the correct Laser Power for a disc. – Method 1 : PCA area is divided by a track. – Method 2 : The previous Calibration value is referred. – Method 3 : ROPC is used to determine Laser Power value automatically in data writing.

• CD-R Disc can write maximum 99 Tracks but CD-RW Disc can write unlimited tracks because it has a rewritable

function.

2) PMA (Program Memory Area)

• It has a track information (track No, track Start/End time) of every track before writing completed. – PMA area has the last written point and the next writable point of a disc. – In case of CD to CD copy, some writer may not write PMA area.

* When Disc is Finalized,

PMA information is transferred to the Lead_In area so that general Driver can read it.

* Because PCA and PMA area exist before Lead-In area, General CD Player or CD-ROM Drive can’t read

these areas.

9. OPC and ROPC

1) OPC (Optimum Power Control)

• This is the first step of writing process, because CD writer has its own laser power value and media have different writing characteristics,

– This is determined by the Writing characteristic, speed, temperature, and humidity. – Laser wavelength is determined by the environmental temperature (775~795nm) and Optical Laser Power is

determined by the test and retry.

• Asymmetry and optimum writing Power

– EFM signal Asymmetry is determined by the writing power.

Therefore, Optical Power which has the same value to the preset power value can be estimated by measuring HF signal Asymmetry on the PCA area.

• Measurement of Asymmetry

* Parameter setting (Beta) : Using AC coupled HF signal before equalization

Beta = (A1+A2)/(A1-A2)

Time

P << Po

Time

P = Po

HF Signal

Time

P >> Po

2) ROPC (Running Optimum Power Control)

• Variable primary factor of Optimum Power

– Change of Power sensitivity on the Disc. (limited to 0.05 *Po) – Wavelength shift of the laser diode due to the operating temperature change. – Change of the Spot aberration due to the Disc skew,

Substrate thickness, Defocus.

– Change of Disc or Optics conditions due to the long term OPC

==> It is necessary to adjust continuously to obtain the Optimum Power.

• Principle of Running OPC

– To meet the factors mentioned above,

a horizontal _ direction movement of a curve is uesd.

– Beta = f(B-level) = constant on the Recorded Disc – Procedure of ROPC

a. Reference B-level is determined during OPC Procedure. b. During Recording, B-level value is controlled to have a close

Reference B-level value.

c. Normalization of B-level is used to eliminate the effect of reflectivity fluctuation.

==> The reflected B-level value is normalized by the disc reflectivity itself.

CCDD--RR// RR WW

Media

Write Strategy Determination

PCA Test Area

Program Area

PMA Area

Lead-In Area

Lead-out Area

OPC

PCA Count Area

ROPC

* Recording Capacity of CD-R/RW (74Minute Recording media)

• (2048 Byte/Sector) X (75 Sector/Second) X (60 Second/Minute) X 74 Minute = 681,984,000 Bytes = 682 Mbytes

• But the actual recording capacity is about 650 Mbytes. (according to the ISO 9660 standard, approximately 30 Mbytes are used to make directory structure and volume names.)

Incident recording pulse

Reflected recording pulse

Sampled timing B

11T

Sample B-level (Write Power)

Level B

Sampled at timing B

Pwo decided by OPC

Recording Power

Level B with Pwo

normalized to recording power

Sample Disc Reflectivity (Read power)

10. Writing Process of DISC

INTERNAL STRUCTURE OF THE PICK-UP

1. Inner Circuit of the PICK-UP

J1-1

J2-1 T-

J2-2 F-

J2-3 T+

J2-4 F+

J1-2

J1-3

J1-4

J1-5

J1-6

J1-7

J1-8

J1-9

J1-10

J1-11

J1-12

J1-13

J1-14

J1-15

J1-16

J1-17

J1-18

J1-19

J1-20

J1-21

J1-22

J1-23

J1-24

J1-25

J1-26

J1-27

J1-28

J1-29

J1-30

T-

F-

T+

F+

GND1

GND2

IIN2

IIN3

GND

OUTEN3

OUTEN2

GND3

IINR

VOUT1

Vref

FE4(B)

FE3(C)

FE2(D)

FE1(A)

Vcc1(HPN)

GND4

OSCEN

ENABLE

Vcc2(DRV)

GND5

4.7k

R33

0.1u

R39

0.1V C2

LD(-)

HIJH7247

IJ4

VCC

FE1

FE2

FE3

FE4

PHTDGND

LD(+)EFGH

MON

R10

C1 0.1u

C11

0.1U

R37 8.2k

C27

B5052

IJ15

51k

15k

1011121314

15k

C6 D.1U

VCO1

OSCEN

ENABLE

RAMP

GND1

OUT

VCO2

PDIN

OUTEN3

OUTEN2

IIN3

IIN2

RFREQ

IINR

VREF

VOUT

• Focus Error = (A+C) - (B+D)

• Dpp = {(A+D)-(B+C)} - k{(E+G) - (F+H)}

2. Signal detection of the P/U

1) Focus Error Signal ==> (A+C)-(B+D)

This signal is generated in RF IC (IC402 : CXA3558R) and controls the pick-up’s up and down to focus on Disc.

2) Tracking Error Signal (DPP Method) ==> {(A+D)-(B+C)}- kx {(F+H)-(E+G)}

This signal is generated in RF IC (IC402 : CXA3558R) and controls the pick-up’s left and right shift to find to track on Disc.

3) RF Signal ==> (A+B+C+D)

This signal is converted to DATA signal in DSP IC (IC102 : OTI-9796).

Pick-Up module

Photo Diode

Tracking

Focusing

Infrared Iaser

k[(F+H) - (E+G)]

(A+D) - (B+C)

(A+D) - (B+C) - k[(F+H) - (E+G)]

Offset

Sub2

Main

Tp/2

Sub1

Track Center

F, E

D,C A,B

H,G

DESCRIPTION OF CIRCUIT

1. ALPC (Automatic Laser Power Control) Circuit

1-1. ALPC Loop Circuit

FPDO

VRDCN

VRDC

RREF1

RREF2

VWDCN

WREF

FPDO

RFPDSH

SRDC

FVREF

WFPDSH

SWDC

WLDON

WR/RE

APCCSW

VWDC

VRDC

Q400 Q401

0.15u

C410

150P

R434

R405

R415

R403

R404

8200P

470

10K

C410

R406

150P

R442

R419

C427

C431

C435

R444

C428

FW-REC

VWDC

OUTEN3

OUTEN2

LDON

OUTEN2

OUTEN3WGATE

CON400

P/U

IC403

DAC

IC102 OTI9796

VREF

(FVREF)

RLDON

RREFSW

APCCSW

WRITEG

WFPDG

S/H

Delay

LDLMTC

-8~+7.75dB

0.25dB step

R7 "1":ON

20k

100p

R12

10k

R10

H:OFF

L:ON

H:ON

L:OFF

20k

R11

10k

20k "0": GND

GND

(Read)

(Write)

REPDG

20dB/26dB

VRGSW

MPXOUT

(testmode)

MPXOUT

(testmode)

S/H

Gain

adj.

typ. 0/6dB

100

4 29

184

183

141

166

1-2. ALPC(Automatic Laser Power Control) Circuit Operation

This circuit consists of Feedback Loop to maintain light output of the Laser Diode(FPDO). Feedback signal, output voltage from PD(Photo Detector) of P/U, is used monitor the light power of Laser Diode.

1) Read Loop

RREF(Read Reference Voltage) of IC402(CXA3558) Pin 5,6, which is from DAC(IC403) Pin 18,19, is the reference level of the Read Loop part of this ALPC Circuit.

• When Playback

VRDC(Pin 4) signal of IC402(CXA3558) is output to P/U through Gain Control S/W and drives Laser Diode during play back. This S/W Ciruit is designed to reduce transition time from CD-RW writing mode to playback mode.

• When writing mode

- CD-R Three Laser Power Levels, Read, Write, and Overwrite, are used to write on CD-R disc, and Read

Level is used to monitor the output laser power. For stabilizing read loop, the S/H signal(RFPDSH), which sample and hold the Read Level of laser power in the CD-R writing mode, is input through Pin 32 of CXA3558.

- CD-RW

Three Laser Power Levels, Read, Erase and Write, are used to write on CD-RW disc, and Erase Level is used, during CD-RW writing, to monitor output laser power. It is not VRDC but VWDC that is the output signal of the control loop performed by Erase level.

2) Write Loop

For stabilizing write Loop, the S/H signal(WFPDSH), which sample and hold the Erase Level of laser

power in the CD-RW writing mode, is input through Pin 31 of CXA3558.

Output voltage of Write Loop, VWDC(Pin 8 of CXA3558), is protected by the high limit diode applied to

P/U.

In the writng mode, the reference signal of Write Loop is WREF(Pin 3&4 of IC403)and it is input to Pin 10

of IC402(CXA3558).

2. RF Amplifier Circuit

Block Diagram

off set adj

(B+C)-(A+D)

2((A+D)-(B+C))

4((F+H)-(E+G))

2((A+D)-(B+C))

A+B+C+D

Gain Adj

LPF

(100KHz)

RRF

IC101 197

A,B,C,D

90 91 92

LPF (40kHZ)

CEO

IC101 204

LPF

(200KHz)

LP F

(200KHz)

E,F,G,H

99 98

Gain Adj

LPF

IC101

198

IC101

194

Gain Adj

HPF

(1kHz)

HPF

EQRFP

IC101

163

(10KHz)

BPF AGC

AGC

HPF

(10kHz)

ATFG

IC101

132

CXA 3558R

PDIC

GND

3.8V

LPH-321A

OTI-9796

Offset adj

X0.5

X0.25

3. Focus/Tracking/Sled Servo Circuit

3-1. Focus, Tracking & Sled Servo Process

Focus, Tracking Servo

E F

Pick- up

A,B,C,D,E,F,G,H

A,B,C,D

Focus Error Detector

Track Error Detector

A,B,C,D E,F,G,H

IC402 CXA3558R

TE FE

A/D

Low freq Gain Filter

Digital

DAC

Sled Co ntrol Signal

IC102 Servo Control OTI9796

LEVEL SHIFT

Tracking Focus ing Actuator

FAO

TAO

F+

F-

T+

T-

IC201 u-COM

Sled Co ntrol

SLED MOTOR

SLO

LEVEL SHIFT

SLO+

IC503 BA5929FP

SLO-

IC403 BU2500FV (DAC)

A/D

IC503 BA5929FP

3-2. Focus Servo

The aim of Focus Servo is to maintain the distance between object lens of P/U and disc surface, so that the detected RF signals (A, B, C, D) can be maximized. Focus Servo is based on focus error (FE) signal which is generated from focus error detection block in CXA3558 (IC402) using Astigmatism Method. Focus gain and path can be changed at the CXA3558 according to the disc, and the resulting output (FE) is input to Servo IC (IC102, OTI-9796). FE signal after first amplification in OTI-9796 is A/D converted and input to Digital Equalizer Block, most important part at the Focus Servo. At the Digital Equalizer, adjustments for Focus Bias and Loop Gain are performed. After D/A converted, Focus servo signal is output through FDO port (OTI-9796, Pin 207) and drive Focus Actuator through the Focus Drive IC (IC503, BA5929FP).

3-3. Tracking Servo

The aim of Tracking Servo is to make laser beam trace the data track on disc. Tracking Error (TE) signal is generated from tracking error detection block in CXA3558 (IC402) using DPP (Differential Push-Pull) Method. DPP method uses not only main beam (A, B, C, D) but side beams (E,F and G, H) for correcting DC offset generated in Push-Pull method. The remaining procedures of TE signal processing in OTI-9796 is similar to Focus Servo. After D/A converted, Tracking servo signal is output through TDO port (OTI-9796, Pin 208) and drive Tracking Actuator through the Tracking Drive IC (IC503, BA5929FP).

3-4. Sled Servo

The working distance of tracking actuator is too short to cover whole disc radius. Sled Servo make PU move by little and little so that the laser beam keep tracing the data track on disc continuously when tracking actuator reaches the working limit. Another function of Sled Servo is to seek a target point on disc, following user commands. SLD move of BW2500FV is generated in µ-com. SLD+, SLD- are output to sled motor via IC503 (BA5929FP).

DISASSEMBLY

1. CABINET

A. Release 3 screws (A). B. Lift up the Cabinet in the direction of arrow (1).

(See Fig.1)

2. MAIN CIRCUIT BOARD

A. Insert and press a rod in the Emergency Eject Hole and

then the CD Tray will open in the direction of arrow (2). B. Release 2 screws (B). C. Remove the Main Circuit Board.

3. FRONT PANEL

A. Remove the Front Panel.(The Front Panel is a snap on

type.)

B. At this time, be careful not to damage the 3 hooks (a) of

the it. (See fig.3)

C. Release 4 screws (C) and remove the Cover Bottom (3).

4. BASE PICK-UP

A. Remove the FPC Cable. At this time, the FPC connector

must be pulled in the direction of Front carefully.

B. Remove the Base Pick-up (4).

(1)

(A)

CABINET

2 HOOKS

HOOKS (a)

FRONT PANEL

COVER BOTTOM

BASE PICK-UP

FPC CONNECTOR

MAIN CIRCUIT BOARD

EMERGENCY EJECT HOLE

Fig.1

Fig.3

Fig.2

Fig.4

(2)

(3)

(C)

(2)

(B)

(4)

ATIP Absolute Time in Pre-groove. With an additional modulation of the “Wobble”, the “Groove” contains a time

code information.

Wobble The pre-groove in the Disc is not a perfect spiral but is wobbled.

With : – A typical amplitude of 30 nm

– A spatial peried of 54~64 µm

CW Continuous Wave. The laser light output is at a constant level.

DOW Direct Over-Write. The action in which new information is recored over previously recorded information in

CD-RW disc.

Overwrite

The action in which new information is recorded over previously recorded information.

(Pre-)Groove

The guidance track in which clocking and time code information is stored by means of an FM modulated wobble.

Land Land is characterized in the following way:

When radial signals are concerned,land is defined as the area between the grooves. When HF signal are concerned,land is defined as the area between the marks(pits) in tangential direction.

Hybrid Disc A Multisession disc of which the first Session is mastered. On a hybrid disc, recorded and

mastered information may co-exist.

Mastered Information,stored as pits on the disc during the manufacturing process of the disc. Information (when making the master)

OPC Optimum Power Control. Procedure is determined optimum recording power according to CD-

R/RW Media in recording start step.

ROPC Running OPC. The purpose is to continuously adjust the writing power to the optimum power

that is required. When the optimum power may change because of changed conditions of disc and change in operating temperature.

Jitter The 16 value of the time variation between leading and trailing edges of a specific (I3 … I11) pit

or land as measured by Time Interval Analysis.

Deviation The difference between a fixed value of Pit length and Land length.

TOC Table Of Contents : in the Lead-in Area the subcode Q-channel contains information about the

Tracks on the disc.

Packet A method of writing data on a CD in small increments. Writing Two kinds of packets can be written : Fixed-length and Variable-length.

Write The shape of the HF write signal used to modulate the power of the laser. Strategy The Write Strategy must be used for recordings necessary for disc measurements.

Information Wobble, ATIP, Disc Identification, Write Power, Speed Range OPC Parameters, etc are Area recorded in the Information area of CD-RW Disc

Finalization The action in which (partially) unrecorded or logically erased tracks are finished and the Lead-in

and/or Lead-out areas are recorded or overwritten with the appropriate TOC subcode.

Logical Erase

A method to remove information from a disc area by overwriting it with an EFM signal containing mode 0 subcode A logically erased area is equivalent to an unrecorded

Physical Erase

The action in which previously recorded information is erased by overwriting with a CW laser output. After a Physical Erase action, the erased area on the CD-RW disc is in the unrecorded state again.

Session

An area on the disc consisting of a Lead-in area, a Program area, a lead-out area.

Multi session

A session that contains or can contain more than one session composed Lead-in and Lead-out

GLOSSARY

TROUBLESHOOTING GUIDE

Are the pin 38

~ 42 of CON100 +5V respectively

after the power cable

connecting?

Reset or Power Check.

• Check the power(5V) short.

• Check the PC power cable.

• Repair the PC power supply.

• Check the IC105(RESET IC).

• Check the IC201(µ-com).

Does the pin 75

of IC102 change from0V to 5V at

the power supply initial input

mode?

• Is the pin 3 of

IC100 and IC106 3.3V?

• Is the pin 4 of IC101 2.5V?

• Is the pin 3 of IC400 1.65V?

YES

Is the X201 and X301 oscillating?

• Check the X201 and X301.

• Check the IC102.

• Check the IC100 and IC106.

• Check the IC101 and IC400.

Check it after connecting the power cable

only for NO Reset or Power ON.

YES

System Check.

Go to “Sled operating is abnormal”

Load tray without inserting disc.

Does Pick-up move to inside?

Does Spindle Motor

rotate in a moment?

Does Laser turn on?

After eject tray, Insert CD-ROM Disc

and reloading.

Does Disc stop?

Does Disc rotate

continuously as Disc recognition is

abnormal?

After eject tray, Insert CD-R Blank Disc

and reloading.

Does Disc rotate

continuously as Disc recognition is

abnormal?

Does Disc stop?

Go to “Spindle motor operating is

abnormal”

Go to “Laser is abnormal”

Go to “Spindle control is abnormal 1”

Go to “Spindle control is abnormal 2”

Go to “Spindle control is abnormal 3”

Go to “RF output is abnormal”

YES

Does Lens move

Up/Down?

Go to “Focus Actuator operating is

abnormal”

YES

Is there Sled

control signal output?

(IC403 pin 8)

Sled operating is abnormal.

Replace the IC501 (BA5929).

Replace the IC102(MICOM).

Aren’t DRV_ MUTE signal

“L”?(IC503 pin 17)

• Check the connction of IC503 pin 5.

• Replace the IC503(BA5929).

• Check the connction of CON400.

• Replace the Sled Motor.

Check the connection of IC201

pin 29.

Is there Sled FG signal

input? (IC102 pin 53)

YES

•

Check the

connecting line of IC403 pin8.

YES

Is there

Sled drive voltage input?

(IC503 pin 5)

YES

Is there

Sled drive voltage output?

(IC503 pin 11, 12)

YES

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