Pioneer PD-M423 서비스 매뉴얼 - 페이지 22

{카테고리_이름} Pioneer PD-M423에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Pioneer PD-M423 44 페이지. Multi-play compact disc player
Pioneer PD-M423에 대해서도 마찬가지입니다: 사용 설명서 (16 페이지)

페이지 인쇄

PD-M423, PD-M403

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 1.2 kHz and 1 Vp-p.

2. Press the TRACK /MANUAL SEARCH FWDPo> .- DP] or REV KK. <ki key to move the pickup to halfway across

the disc (R=35 mm), then press the PGM(PROGRAM) key, the PLAY/PAUSE [> / [ll] key twice in that order to

close the corresponding servos and put the player into play mode.

3. Adjust VR152 (FCS. GAN) so that the Lissajous waveform is symmetrical about the X axis and the Y axis.

Focus Gain Adjustment

Higher gain

Optimum gain

Lower gain