Adjustment - Kenwood CD-203 Service Manual

No. ITEM
Open the tray (Normal mode), then turn the power off.
1 LASER POWER
1. Press the STOP key.
2. Press the OPEN key.
3. Load a disc, then press the CLOSE key.
4. Press the PLAY key.
5. Press the OPEN key to open the tray.
6. Turn the power off. (Player stops as the tray is opened while the disc clamped.)
7. While pressing the TIME DISP. key, turn the power ON to enter the Test mode.
TRACKING ERROR
2
BALANCE
FOCUS ERROR
3
BALANCE
Apply signal of
4 TRACKING GAIN
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.
LPF: Around 47 kΩ+ 390 pF or so.
Step 1~4 are in Test Mode.
(a) Laser power
Pickup

ADJUSTMENT

INPUT OUTPUT
SETTINGS SETTINGS
Apply the sensor section
−
of optical power meter
on the pickup lens.
Connect an oscilloscope
Test disc as follows.
Type 4 CH1 : RF (CN2 pin 1)
CH2 : TE1 (CN2 pin 6)
Connect an oscilloscope
Test disc as follows.
Type 4 CH1 : RF (CN2 pin 1)
CH2 : TE1 (CN2 pin 6)
Test disc
Type 4 Connect a LPF to CN2
pin 5-6 to which you
1.2 kHz, connect an oscilloscope
50mVrms to or AC voltmeters.
CN2 pin 5-6.
0.08~0.15 mW
Optical power meter
CD-203/204/DPF-R3010/R3010E/R4010/R4010E
PLAYER ALIGNMENT
SETTINGS POINTS
While pressing the
TIME DISP. key, turn
the AC ON. (Test
mode) Press the
PLAY/PAUSE key,
then confirm that the
display is "03".
Press the
PLAY/PAUSE key, TE BALANCE
then confirm that the
display is "03".
Press the
PLAY/PAUSE key, FE BALANCE
then confirm that the
display is "05".
Press the
TRACKING
PLAY/PAUSE key,
then confirm that the
display is "05".
(e) Tracking gain
CN2
1
2
3
_
4
5
1.2 kHz
50 mVrms
6
+
7
ALIGN
FOR
On the power from
0.08 to 0.15 mW,
when the diffraction
−
grating is correctly
aligned with the RF
level of 1.0 Vp-p or
more.
Symmetry between
upper and lower pat-
VR2
terns
Optimum eye pattern
VR1
Two VTVMs should
GAIN
read the same value.
VR3
VC
+
L.P.F. VTVM
+
L.P.F. VTVM
FIG.
(a)
(e)
5