Kenwood D-S300, Руководство по обслуживанию

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DP-4090/5090/D-S300
9
ADJUSTMENT
FIG.
GND
+
_
L.P.F.
+
+
L.P.F.
VTVM
VTVM
1
2
3
4
5
6
7
1.2 kHz
50 mVrms
(a)
No. ITEM
INPUT
SETTINGS
OUTPUT
SETTINGS
ALIGNMENT
POINTS
ALIGN
FOR
PLAYER
SETTINGS
1 LASER POWER
−
Apply the sensor section
of optical power meter
on the pickup lens.
−
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.
While pressing the
UP key, turn the AC
ON. (Test mode)
Press the
PLAY/PAUSE key,
then confirm that the
display is "03".
(a) Laser power
Pickup
3
FOCUS ERROR
BALANCE
Test disc
Type 4
Connect an oscilloscope
as follows.
CH1 : RF (CN2 pin 1)
CH2 : FE (CN2 pin 2)
FE BALANCE
VR1
Optimum eye pattern
Press the
PLAY/PAUSE key,
then confirm that the
display is "05".
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.
LPF: Around 47 k
Ω
+ 390 pF or so.
0.08~0.15 mW
Optical power meter
2
TRACKING ERROR
BALANCE
Test disc
Type 4
Connect an oscilloscope
as follows.
CH1 : RF (CN2 pin 1)
CH2 : TE (CN2 pin 6)
TE BALANCE
VR2
Symmetry between
upper and lower pat-
terns
Press the
PLAY/PAUSE key,
then confirm that the
display is "03".
CN2
(e) Tracking gain
(e) 4 TRACKING GAIN
Test disc
Type 4
Apply signal of
1.2 kHz,
50mVrms to
CN2 pin 5-6.
Connect a LPF to CN2
pin 5-6 to which you
connect an oscilloscope
or AC voltmeters.
TRACKING
GAIN
VR3
Two VTVMs should
read the same value.
Press the
PLAY/PAUSE key,
then confirm that the
display is "05".
Step 1~4 are in TEST MODE