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Out of adjustment
Optimum adjustment
Out of adjustment
Out of
Optimum
Out of
adjustment
adjustment
adjustment
Figure 4 Eye pattern
4. RF Level Verification
@ Objective
To verify the playback RF signal amplitude
@ Symptom when out of
No play or no search
adjustment
@ Measurement instru-
Connect the oscilloscope to
@ Player state
ment connections
TP1, Pin 1 (RF) and GND of it
to TP1, Pin 3(VC).
Test mode, play
@ Adjustment location
| None
[Settings]
50mV/division
[Procedure]
1. Move the pickup to midway across the disc (R=35mm) with the MANUAL/TRACK SEARCH FWD
PPPDP or
REV {<k<ki key, then press the PG@M(PROGRAM) key, the PLAY > key, then the PAUSE []{] key in that order to
close the respective servos and put the player into play mode.
2. Verify the RF signal amplitude is 1.2 Vp-p + 0.2V.
41
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