SAMSUNG max673 Alignment and Adjustments

2-1Samsung Electronics

2. Alignment and Adjustment

2-1 CD

WVR1

T.G

WVR2

F.G

WVR3

E/F. B

WVR4

F.B

Vref

0V

A=B

---100mV

---0V

---250mV

---0 V

---100mV

---0 V

2-1-1 To Adjust FOCUS BIAS(STOP mode)

2-1-3 To Adjust Focus Gain (PLAY mode)

2-1-2 To Adjust Tracking Gain (PLAY mode)

2-1-4 To Adjust E/F Balance (PLAY mode)

1. Set Volt/Div of the oscilloscope to DC 100mV.

2. Ground the scope input and set the waveform to 0V, DC range.

3. Connect the GND terminal of the oscilloscope to Vref, and (+) terminal to center of AP1.

4. Set WVR4 to 0mV.

1. Connect the ground terminal of the oscilloscope to Vref and (+) terminal to AP2.

2. Load and play the disc

3. While the disc is running adjust the gain with WVR1 as shown below.

1. Connect the ground terminal of the oscilloscope to Vref and (+) terminal to AP1.

2. Load and play the disc

3. While the disc is running adjust the gain with WVR2 as shown in the following figure.

VOLT/DIV : 0.2V TIME/DIV : 2mS

Normal frequency

Low frequency

High frequency

Low frequency

High frequency

VOLT/DIV : 0.1V TIME/DIV : 2mS

VOLT/DIV : 0.2V TIME/DIV : 2mS

1. Set TIME/DIV of the oscilloscope to 2mS.

2. Set Volt/DIV of the oscilloscope to 0.5V.

3. Ground the scope input and set to DC. and then set the DC range.

4. Connect the ground terminal of the oscilloscope to Vref and (+) terminal to center to AP2.

5. Load and play the disc.

6. Turn WVR1 counterclockwise to the minimum value.

7. Raise WVR3 and adjust the waveform so that its middle comes to ground of the oscilloscope (or until the upper half of waveform becomes symmetrical to the bottom half, A=B)

8. Adjust WVR1 (arrow) for normal sound.