Samsung S1000 Service Manual page 14

Alignment and Adjustments
4-3 CD
4-3-1 To Adjust FOCUS BIAS (STOP 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 FE2.
4. Set WVR1 to 0mV.
4-4
4-3-2 To Adjust Tracking Gain (PLAY mode)
1. Connect the ground terminal of the oscilloscope to Vref and (+) terminal to TE2.
2. Load and play the disc.
3. While the disc is running adjust the gain with WVR4 as shown below.
Low Frequency
Normal Frequency
0V
VOLT/DIV : 0.2V
VOLT/DIV : 0.2V
TIME/DIV : 2mS
TIME/DIV : 2mS
4-3-3 To Adjust Focus Gain (PLAY mode)
1. Connect the ground terminal of the oscilloscope to Vref and (+) terminal to FE2.
2. Load and play the disc.
3. While the disc is running adjust the gain with WVR3 as shown in the following figure.
Low Frequency
Normal Frequency
100mV
0V
VOLT/DIV : 0.1V
VOLT/DIV : 0.1V
TIME/DIV : 2mS
TIME/DIV : 2mS
4-3-4 To Adjust E/F Balance (PLAY mode)
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 TE2.
5. Load and play the disc.
6. Turn WVR4 counterclockwise to the minimum value.
7. Raise WVR2 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. Ajdut WVR4 (arrow) for normal sound.
High Frequency
0V 0V
VOLT/DIV : 0.2V
TIME/DIV : 2mS
High Frequency
250mV
100mV
0V
0V
VOLT/DIV : 0.1V
TIME/DIV : 2mS
0V
A=B
Samsung Electronics