DP-SG7/SG7G
ADJUSTMENT
INPUTOUTPUTPLAYERALIGNMENTALIGN
No.ITEMFIG.
SETTINGSSETTINGSSETTINGSPOINTSFOR
While pressing the "REPEAT" key, turn the AC ON.
{ Refer to test mode (MODE 0 0) }
On the power from
0.08 to 0.15 mW,
Press the
Apply the sensor sectionwhen the diffraction
PLAY/PAUSE key,
1LASER POWER-of optical power meter-grating is correctly(a)
then confirm that the
on the pickup lens.aligned with the RF
LED is "03".
level of 0.6 Vp-p or
more.
Connect an oscilloscopePress the
FOCUS ERRORTest discas follows.PLAY/PAUSE key,FE BIAS
2Optimum eye pattern
BIASType 4CH1 : RF (CN3 pin 1)then confirm that theVR2
CH2 : TE (CN3 pin 6)LED is "05".
Connect an oscilloscopePress the
Symmetry between
TRACKING ERRORTest discas follows.PLAY/PAUSE key, TE BALANCE
3upper and lower pat-
BALANCEType 4CH1 : RF (CN3 pin 1)then confirm that the VR1
terns
CH2 : TE (CN3 pin 6)LED is "03".
Test disc
Type 4Connect a LPF to CN3Press the
TRACKING
Apply signal ofpin 5-6 to which youPLAY/PAUSE key,Two VTVMs should
4TRACKING GAINGAIN(e)
1.2 kHz,connect an oscilloscopethen confirm that theread the same value.
VR3
50mVrms toor AC voltmeters.LED is "05".
CN3 pin 5-6.
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.(KTD-0])
LPF: Around 47 k1+ 390 pF or so.
Step 1~4 are in Test Mode.
(a) Laser power(e) Tracking gain
0.08 0.15 mWCN3
1RF
2FE1
VC
3FE2
VC
_4
+
TE2
1.2 kHz5L.P.F.VTVM
50 mVrms
6TE1
++
Pickup7 S.SL.P.F.VTVM
Optical power meter
ALIGNMENT POINTS
CN1
T-GAINTE-B FE-B
VR3VR1VR2
4 |
ACEC
