Pioneer PD-P920M Service Manual page 32

Multi- play compact disc player

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PD-P920M

Out of adjustment

Optimum adjustment

;

Out of adjustment

Optimum

adjustment

Figure 5 Eye pattern

5. RF Level Adjustment

@ Objective

To optimize the playback RF signal amplitude

@ Symptom when out of | No play or no search

adjustment

@Measurementinstru-

| Connect the oscilloscope to

@ Player state

Test mode, play

ment connections

TPI, Pin 1 (RF).

[Procedure]

1. Move the pickup to midway across the disc (R=35 mm) with the MANUAL/TRACK

SEARCH FWD b> / DDI or

REV KK / <1) key, then press the PROGRAM key, then the PLAY/PAUSE

/ (0 key in that order to close the

respective servos and put the player into play mode.

2. Adjust VR1 (laser power).so that the RF signal amplitude is 1.2 Vp-p + 0.1 V.

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