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DW - $114X
7. Tracking Amp. Gain Adjustment
@ Symptom when out of | Player does not playback, track search is impossible, tracks are skipped.
adjustment
e@ Measurement instru-
| Connect the oscilloscope to
@ Player state
Spindle rotation frequency : Normal
ment connections
TP20! (CN601), Pin 2 (TE).
speed, focus ON, spindle ON/
{This connection may be via a
tracking OFF
low-pass filter
oko +1000pF).
@Adjustment location
|VR2 (TE. GAIN)
[Settings]
50 mV/division
5 ms/division
DC mode
[Procedure]
1. Move the pickup to midway across the disc (R=35mm).
2. Line up the bright line (ground) at the center of the oscilloscope screen and put the oscilloscope into DC mode.
3. Set to spindle rotation frequency : Normal speed, focus ON and spindle ON.
4. Adjust VR2 (TE. GAIN) so that the positive amplitude and negative amplitude of the tracking error signal at TP201
(CN601), Pin 2 (TE) is 2.0V + 0.1V.
GND
2.0V + 0.1V
47
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