Kenwood DP-R896 Service Manual page 5

INPUT SET-
TINGS
ADJUSTMENT
OUTPUT SETTINGS
PLAYER
SETTINGS
DP-R896
ALIGNMENT
POINTS
ALIGN FOR
ove the clamper ass'y before step 1. And remount it after step 1.
LASER POWER
Set the sensor section
of the optical power
meter on the pickup
lens,
With pressing the
P.MODE key, turn the
power on to enter the
test mode. Press the
CHECK key to check
that the display is
"03",
On the power from
0.08 to 0.15 mW,
when the diffraction
grating is correctly
aligned with the RF
level of 1.0Vp-p or
more.
Cancel test mode and open the tray to load the disc.
TRACKING ERROR
Test disc
Type 4
Connect an oscilloscope
as follows.
CH1:RF (CN3-1)
CH2:TE (CN3-6)
aa
Load disc and set to
test mode.
Confirm the display
is "03".
TE BALANCE
VR4
Symmetry between
upper and lower or
DC=0 + 0.025V
FOCUS ERROR
Test disc
Type 4
Connect an oscilloscope
as follows.
CH1:RF (CN3-1)
CH2:TE (CN3-6)
Press the PLAY key.
Confirm that the dis-
play is "05".
| FE BALANCE
VR1
Optimum eye pattern
Note:
FOCUS GAIN
TRACKING GAIN
Test disc
Type 4
Apply signal of
1.0 kHz,
50mVrms to
CNS pin 2-3.
Test disc
Type 4
Apply signal of
1.0 kHz,
50mVrms to
CNS pin 5-6.
Connect a LPF to CN3
pin 2-3 to which connect
an oscilloscope or AC
voltmeters.
Connect a LPF to CN3
pin 5-6 to which connect
an oscilloscope or AC
voltmeters.
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.
LPF : Around 47 k Q +390 pF or so.
Step 1 ~5 are in Test Mode.
(a) Laser power
4,
Pickup
0.08 ~ 0.15
iG
Press the PLAY key.
Confirm that the dis-
play is "05".
Press the PLAY key.
Confirm that the dis-
play is "05".
FOCUS GAIN
VR2
TRACKING
GAIN
VR3
(e) Focus Gain, Tracking Gain
Optical power meter
Tracking gain
CN3
COOH OO/O
Two VTVMs should
read the same value.
Two VTVMs should
read the same value.