Servo System Adjustments; Ld Side A Adjustment - Sony MDP-V10 Service Manual

7-6. SERVO SYSTEM ADJUSTMENTS

7-6-1. LD Side A Adjustment

1 Put the LD alignment disc HLV-8 in with the CAV side to the
side A, play it and pause at the chapter 3 (#2201).
2 Connect an oscilloscope to LD RF terminal on the MD adjust-
ment cable and adjust RV701 so that the RF waveform goes
maximum in the state the TRACKING and SLED are ON.
Fig. 7-6.
3 Play #770 and pause.
4 Check that the vertical bar appears on TV monitor and right and
left crosstalks (moire) are the same level and minimum.
Fig. 7-7.
5 Tracking gain and focus gain adjustment are not necessary.
– Already adjusted at the optical pick-up block side –
6 Check the tracking bal
Measure the resistance at the Y terminal of TRACKING ERR
on jig with oscilloscope.
A
0 Vdc
B
Check that it meets
A – B
< =
–6
2 (A + B)
Fig. 7-8.
Maximum
Cross talk (moire)
< =
x 100 (%) 9
TRACKING BAL check
Note: The last code-C of parts No. for MD
TRIG ERR
7-4
adjustment cable will be assigned
with TRK ERR Y1 and Y2 ( part).
In this case, use the Y1 terminal.
MD adjustment cable
Measurement point
Mode: TRACKING, SLED OFF
Oscilloscope: 1V/div
LD RF
Fig. 7-9.