Pioneer PDR-04 - Manual (Page 61)

PDR-04
6.3.9 Main and Sub Mix Ratio Adjustment Adjustment 2
► Objective
• Symptom when out
of adjustment
To mix the gain of the main signal output and sub signal output of the pickup.
Player does not playback.
• Measurement instru­
ment connections
Connect the oscilloscope to
CH1:CN104(TP1), Pint (STE)
CH2: CN104 (TP1), Pin 2 (MSTE)
[These connections must be via
low pass filters. ]
[ Settings ]
cm : 50 mV/div. AC mode
10 mS/div. ADD mode
CH2 : 100 mV/diV. AC mode
> Player state
> Adjustment
location
• Disc
Test mode, focus and spindle servos
closed and tracking servo open
VR110(MS. MIX)
(HEAD BOARD assy)
STD-903
[ Procedure ]
(1 ) Press the FINALIZE key, then the PLAY ► key In that order to close the focus servo then the spindle servo.
(2) Set the oscilloscope to ADD mode (waveform adding mode of CHI and CH2) and observe the adding waveform of CHI
and CH2.
(3) Adjust VR110 (MS. MIX) so that the amplitude of waveform becomes minimum.
6.3.10 Tracking Amp. Gain Adjustment Adjustment 2
• Objective
• Symptom when out
of adjustment
To correct the discrepancy in the tracking error level with the pickup.
Player does not playback, track search is impossible, tracks are skipped.
» Measurement instru­
ment connections
Connect the oscilloscope to
CN104 (TP1), Pin3(TE)
[These connection must be via a
low pass filter (15kQ + 0.001 pF). ]
[ Settings ] 20 mV/div.
5 mS/dIv.
DC mode
Player state
» Adjustment
location
• Disc
Test mode, focus and spindle servos
closed and tracking servo open
VR111 (TE. GAIN)
(HEAD BOARD assy)
STD-903
[ Procedure ]
(1 ) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD ►► or REV
◄◄ keys.
(2) Press the FINALIZE key, then the PLAY ► key in that order to close the focus servo then the spindle servo.
(3) Line up the bright line (ground) at the center of the oscilloscope screen and put the oscilloscope into DC mode.
(4) Adjust VR111 (TE. GAIN) so that the positive amplitude and negative amplitude of the tracking error signal at CN104
(TP1), Pin 3 (TE) is 1.0V+ 0.05V.
1.0V ± 0.05V
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