Samsung sd608 Reference Information

3-1Samsung Electronics

3. General information

3-1-1 Circuit description

3-1-1. Front

ROM

3-1-2. Rear

Figure 3-1

Figure 3-2

Earphone

jack

Up/Down

Volume

LED

Disc

tray

Emergency

HOLE

Stop/Open

button

Digital output

terminal

(Optional)

Sound output

terminal

Master/Slave

select pin

Interface terminal

Power terminal

3-2 Samsung Electronics

3-2. Circuit description

3-2-1. RF

3-2-1(A) IC101 (TA1313F)

IC101(TA1313F) is used in combination with TC9489F as bipolar IC developed for CD/DVD RF signal system. In main, it
receives the pick-up output converted into I/V and preforms DVD waveform equalization(EQ), CD equalization(EQ),
astigmatic focus error signal generation, 1-beam tracking error signal generation(by DPD method), 3-beam tracking error
signal generation FE, TE, RF GAIN adjutment and laser power control, etc.

1) Reference potentiometer
IC101 selects a single power method and from pick-up input singnal terminl works on the basis VrA of 2.1.V.

2) CD/DVD-RF signal system: IC101(TA1313F)
Figure 3-3 shows the flow of RF signal generated in pick-up.

EQ control parameter

1. EQF(58pin): Change the peak frequency with EQ frequency features.
(Convert PWM signal, (TC9489F(168-pin) into DC via low-pass fiter and supply it.)

2. EQB(57pin): Change the boost of EQ frequency features.

3. VRCK(17pin):Input the base clock and link the peak frequency with it.

Figure 3-3

3-3Samsung Electronics

3-2-2 SERVO circuit description

3-2-2(A) Outline

SERVO system of DVD is divided into FOCUS SERVO, TRACKING SERVO, STEP MOTOR LINKED SERVO and
SPINDLE MOTOR CONTROL SERVO.

1) FOCUS SERVO
Focus the optical spot outputted from object lens on disc surface correctly by maintaining a regular distance between

object lens of Pick-up and disc for surface vibration of disc.

2) TRACKING SERVO

Make the object lens follow the disc track in use of tracking error signal created from Pick-up.

3) STEP MOTOR LINKED SERVO

When the tracking actuator inclines to outer as the object lens follow the track at play, move STEP motor a little. and
prevent it from leaning.

4) SPINDLE MOTOR CONTROL SERVO

Control the disc motor to maintain a constant angular velocity in use of FG signal outted in Drive IC.