Adjustment - Kenwood DPF-K6010V Service Manual

DPF-K6010V
INPUT
No. ITEM
SETTINGS
LASER
1
POWER
TRACKING
Test disc
ERROR
2
Type 4
BALANCE
FOCUS
Test disc
3 ERROR
Type 4
BIAS
Test disc
Type 4
TRACKING
4 Apply signal of 1.2
GAIN
kHz, 50mVrms to
CN2 pin 5-6.
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
10

ADJUSTMENT

OUTPUT
SETTINGS
Apply the sensor
section of optical
−
power meter on the
pickup lens.
Connect an oscillo-
scope as follows.
CH1 : RF (CN2 PIN1)
CH2 : TE1 (CN2 PIN6)
Connect an oscillo-
scope as follows.
CH1 : RF (CN2 PIN1)
CH2 : TE1 (CN2 PIN6)
Connect a LPF to
CN2 pin 5-6 to
which you connect
an oscilloscope or
AC voltmeters.
0.05~0.15 mW
Optical power meter
ALIGNMENT
PLAYER SETTINGS
While pressing the DISC 3
key, turn the AC ON. Press
the DISPLAY key, and then
press the SELECT [ 3 ] key.
confirm that the display is
"2 01".
Press the SELECT key(3),
TE BALANCE
then confirm that the display
is"2 01".
Press the SELECT key(3),
then confirm that the display
is "2 02".
Press the SELECT key(3), TRACKING
then confirm that the display
is "2 02".
(e) Tracking gain
CN2
1
2
3
_
4
1.2 kHz
5
50 mVrms
6
+
7
ALIGN FOR
POINTS
On the power from 0.05 to
0.15 mW, when the dif-
−
fraction grating is correct-
ly aligned with the RF
level of 0.8 Vp-p or more.
Symmetry between upper
and lower patterns
VR2
DC=0±25mV
FE BIAS
Optimum eye pattern
VR1
Two VTVMs should read
GAIN
the same value.
VR3
VC
+
L.P.F. VTVM
+
L.P.F. VTVM
FIG.
(a)
c
(b)
or
(d)
(e)