4-2-1. Block Diagram (Wobble CLV Servo)

 

 

 

 

 

 

C116

C117

C118

 

 

 

 

 

 

 

WAG1

WAG2

WAG3

 

 

 

 

 

 

 

18

19

20

 

 

 

 

SA

 

 

 

 

 

 

 

 

 

87

 

ADO

 

 

 

 

 

 

 

SB

S

HPF

AGC1

-

 

 

 

 

88

 

 

 

 

SC

/

 

 

 

HPF

 

 

 

 

H

 

 

 

+

 

Disc

 

 

89

HPF

 

AGC2

 

 

 

SD

 

 

 

 

 

 

 

BCO

 

 

 

 

Motor unit

Optical

 

90

 

 

 

 

 

 

MA

 

 

 

 

 

 

 

Pick-up

C171

92

 

 

 

 

 

 

HOP-7632TS

MB

 

 

BPF

HPF

AGC3

 

 

 

 

 

 

 

93

 

 

 

 

 

 

 

 

C172

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MC

 

 

 

 

 

WOBSIG

 

 

 

94

 

 

 

HPF

+

 

 

C173

 

 

 

37

 

 

MD

 

 

 

 

 

 

 

 

 

 

 

 

-

 

 

 

 

 

VREF

 

 

 

 

C174

95

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

WBLSH

 

IC101

 

 

 

 

 

WBLSH

 

31

 

R2S35002

 

 

 

 

1.65V

IC301

 

 

 

 

 

 

 

 

R8J32007

 

 

 

 

 

154

 

R375

 

 

 

 

 

 

 

SPD

SPD

P

 

M

 

 

 

 

SP

 

211

 

 

 

 

 

 

W

 

U

 

 

 

 

 

C349

R349

M

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

PH

 

 

 

 

 

Motor Kick

 

 

 

 

 

 

 

 

 

 

 

 

1.65V

 

 

 

 

REG

 

 

 

 

 

 

 

 

 

 

 

 

 

4-2-2. Wobble CLV Servo

CD-R : 4x, 8x, 16x, 24x, 32x, 40x, 48x

/CD-RW : 4x, 10x, 16x, 24x, 32x

/DVD-R : 2x, 4x, 8x, 16x(PCAV)

/DVD-R DL : 2x, 4x

/DVD-RW : 1x, 2x, 4x, 6x

/DVD+R : 2.4x, 4x, 8x, 12x, 16x(PCAV)

/DVD+R DL : 2.4x, 4x, 6x

/DVD-RAM : 2x, 3x, 3-5x(PCAV)

/DVD+RW : 2.4x, 4x, 8x

When drive write DVD-RAM/R/RW/+R/+RW/CD-R/CD-RW, the spindle motor is controlled using Wobble CLV Spindle Servo.

The WOBSIG signal(R2S35002 37pin) input to DSP IC(R8J32007 154pin). The DSP Controller in R8J32007 uses WOBSIG as linear velocity feed back, therefore the Wobble CLV Spindle Servo doesn’t work well when WOBSIG signal is abnormal.

The spindle controller PWM output signal SPD (R8J32007 211pin) input to SPIN in Drive IC(R2S30202FP 1pin) after Low-Pass Filtering.

The PWM output signal U,V, W signal(R2S30202FP 12, 13, 14pin) drives Spindle Motor without using a sensor.

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LG Electronics GSA-4167B, GSA-4168B, GSA-4165B service manual Block Diagram Wobble CLV Servo

GSA-4167B, GSA-4165B, GSA-4168B specifications

LG Electronics has been a prominent name in the electronics industry, particularly known for its innovative optical storage solutions. Among its noteworthy products are the GSA-4167B, GSA-4165B, and GSA-4168B DVD writers, each showcasing a blend of advanced technology and user-friendly features tailored to meet diverse consumer needs.

The LG GSA-4167B stands out for its versatility and performance. This model supports a wide range of disc formats, including DVD-R, DVD+R, DVD-RW, DVD+RW, and dual-layer DVDs, enhancing its usability for various applications. With a generous writing speed of up to 16x for DVD+R and 8x for dual-layer DVDs, users can create and backup data efficiently. This device is equipped with LG’s Super Multi technology which allows it to read and write multiple formats, making it a perfect choice for users who wish to maximize their media experience without being restricted to a single format.

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On the other hand, the LG GSA-4168B is known for its advanced capabilities, particularly in terms of burning dual-layer DVDs. Supporting speeds up to 16x for standard DVDs and 4x for dual-layer formats, it combines speed with efficiency. This model incorporates LightScribe technology, enabling users to etch labels directly onto specially coated discs, adding a personal touch to data storage. Its efficient cooling system helps maintain performance during extensive usage, ensuring longevity and reliability.

All three models represent LG's commitment to quality and innovation in optical storage technology. With features such as Power Burn technology and Seamless Link, they provide users peace of mind during high-speed data transfers. Their compatibility with different operating systems further enhances their versatility, making them suitable for both home users and professionals. Overall, the GSA-4167B, GSA-4165B, and GSA-4168B are exemplary models that reflect LG Electronics' dedication to advancing technology and enhancing user experience in the realm of optical drives.