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5. Focus Servo Loop Gain Adjustment

@ Objective

To optimize the focus servo loop gain.

@Symptom when out of | Playback does not start or focus actuator noisy.

adjustment

[Procedure]

1. Set the AF generator output to 1.2kHz and 1 Vp-p.

2. Press the TRACK / MANUAL SEARCH FWD D> - Dpjor REV I<k]- <<] key to move the pickup to halfway across

Figure 4

Focus Gain Adjustment

Higher gain

Optimum gain

Lower gain