Samsung MAX-485 - Page 38

8-3. CD section
9258
BTL DRIVE
8-3-1. To adjust FOCUS BIAS (STOP mode)
1) Set Volt/Div of the oscilloscope at DC 100mV.
2) In GND condition of the oscilloscope, set the wave form at OV,
and then set it in the DC range.
3) Connect the GND disconnector of the oscilloscope at VREF of
WCW10, and (+) disconnector to FE of WCW10.
4) By using WVR1 set it at OmV.
8-3-4. To adjust TRACKING GAIN (PLAY mode)
1) Connect;GND disconnector of the oscilloscope to VR of WCW10 and (+)disconnector to VREF of WCW10.
2) Load and play the disc.
3) While the disc is running adjust the gain with WVR4 as shown in the following picture.
(Normal freqency) (Low frequency) (High frequency)
VOLT/DIV: 0.2V
TIME/DIV: 2mS
VOLT/DIV: 0.2V
TIME/DIV: 2mS
VOLT/DIV:0.2V
TIME/DIV:2mS
8-3-3. To adjust FOCUS GAIN (PLAY mode)
1) Connect;GND disconnector of the oscilloscope to VR of WCW10 and (+)disconnector to VREF of WCW10.
2) Load and play the disc.
3) While the disc is running adjust the gain with WVR3 as shown in the following picture.
(Normal fregency) (Low frequency) (High frequency)
.1 VAI 2 aetDty
0.) vane
rei
VOLT/DIV: 0.1V
TIME/DIV: 2mS
VOLT/DIV: OV
TIME/DIV: 2mS
VOLT/DIV:0.1V
TIME/DIV:2mS
8-3-2. To adjust E/F BALANCE (PLAY mode)
1) Set TIME/DIV of the oscilloscope at 2mS.
2) Set Volt/DIV of the oscilloscope at 0.5V.
3) At GND setting of the oscilloscope set the wave form at Ov and
then set it in the DC range.
4) Connect;GND disconnector of the oscilloscope to VREF of WCW10
and (+)disconnector to VREF of WCW10.
5) Load and play the disc.
6) Turn WVR4 clockwise to the minimum value.
7) Raise WVR2 and adjust the wave form so that the middle of wave
comes to the GND of the oscilloscope or until the upper half of
wave form becomes symmetrical to the buttom half. (A=B)
8) Adjust WVR4 in the arrow direction to achieve a normal sound
effect.