Advertisement
7. Tracking Servo Loop Gain Adjustment
@ Objective
To optimize the tracking servo loop gain.
@ Symptom when out of | Playback does not start, during searches the actuator is noisy, or tracks are skipped.
adjustment
@Measurementinstru-
| See Figure 7.
@ Player state
Test mode, play
ment connections
[Settings]
CHI
CH2
@ Adjustment location
| VR1S1 (TRK. GAN)
[Procedure]
1. Set the AF generator output to 1.2kHz and 2 Vp-p.
2. Press the MANUAL SEARCH FWD D> or REV <ki key to move the pickup to halfway across the disc (R=35 mm),
Pin 3 (TRK. IN)
Pin 4 (GND)
Low pass filter
Tracking Gain Adjustment
48
Advertisement
