Table of Contents
Advertisement
5. RF Level Adjustment
@ Objective
To optimize the playback RF signal amplitude
Symptom when out of
adjustment
No play or no search
@ Measurement instru-
ment connections
Connect the oscilloscope to
@ Player state
TPI, Pin { (RF).
Test mode, play
@ Adjustment location
| VRI{laser power)
[Settings]
50mV/division
10 ms/division
AC mode
@ Disc
YEDS-7
[Procedure]
1, Move the pickup to midway across the disc (R=35 mm) with the MANUAL SEARCH FWD PP or REV <k key, then
press the PROGRAM key, then the PLAY
> 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.
46
Advertisement
Table of Contents
