DP-SG7/SG7G
ADJUSTMENT
No. ITEM INPUT SETTINGS OUTPUT SETTINGS PLAYER SETTINGS ALIGNMENT POINTS ALIGN FOR FIG.
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, when the diffraction grating is correctly aligned with the RF level of 0.6 Vp-p or more.
1
LASER POWER
�
Apply the sensor section of optical power meter on the pickup lens.
Press the PLAY/PAUSE key, then confirm that the LED is "03".
�
(a)
2
FOCUS ERROR BIAS
Test disc Type 4
Connect an oscilloscope as follows. CH1 : RF (CN3 pin 1) CH2 : TE (CN3 pin 6)
Press the PLAY/PAUSE key, then confirm that the LED is "05".
FE BIAS VR2
Optimum eye pattern
3
TRACKING ERROR BALANCE
Test disc Type 4
Connect an oscilloscope as follows. CH1 : RF (CN3 pin 1) CH2 : TE (CN3 pin 6)
Press the PLAY/PAUSE key, then confirm that the LED is "03".
TE BALANCE VR1
Symmetry between upper and lower patterns
4
TRACKING GAIN
Test disc Type 4 Connect a LPF to CN3 Apply signal of pin 5-6 to which you 1.2 kHz, connect an oscilloscope 50mVrms to or AC voltmeters. CN3 pin 5-6.
Press the PLAY/PAUSE key, then confirm that the LED is "05".
TRACKING GAIN VR3
Two VTVMs should read the same value.
(e)
Note: Type 4 disc : SONY YEDS-18 Test Disc or equivalent.(KTD-0V) LPF: Around 47 k�+ 390 pF or so. Step 1~4 are in Test Mode.
