Pioneer PDR-04 - Manual (Page 59)

PDR-04
6.3.4 3T Falling Edge Time Adjustment Adjustment 2
• Objective
• Symptom when out
of adjustment
Pulse adjustment for recording (3)
Player does not playback CD-R discs which was recorded with this player.
• Measurement instru­
ment connections
Connect the oscilloscope to
CHI : CN3506, Pin 3 (3T IN).
CH2 : CN3506, Pin 2 (3T OUT).
(STRATEGY SMALL BOARD assy)
[ Settings ]
CHI : 1 V/div. DC mode
20 nS/div.
CH2 :1 V/div. DC mode
Player state
• Adjustment
location
• Disc
Test mode, recording
power ON
VR3503 (3T DLY)
(STRATEGY SMALL BOARD assy)
None needed
[Procedure]
(1) Disconnect a connector CN3502.
(2) Turn VR104 (REC. PW) fully counterclockwise to reduce the power is minimum.
(3) Press REC O and REC MUTE O keys in this order to lights up the laser diode.
(4) Adjust the time from falling edge of CN3506 pin 3 to falling edge of pin 2 of waveform with 2V level.
(5) Adjust VR3503 (3T DLY) so that the DC voltage becomes 40nS ± 3nS.
2V
*GND
6.3.5 WBL+ Offset Adjustment
Adjustment 2
• Objective To adjust the gain balance of the wobble signal.
• Symptom when out
of adjustment
Player does not record or playback CD-R discs.
• Measurement instru­
ment connections
Connect the oscilloscope to
CNI 04 (TP1), Pin 6 (RWBL).
(HEAD BOARD assy)
[ Settings ] 1 mV/div.
5 mS/div.
DC mode
• Player state
• Adjustment
location
• Disc
Test mode, stop
VR107(WBL+. OFS)
(HEAD BOARD assy)
None needed
[ Procedure ]
(1) Turn VRI08 (WBL. OFS) to fully counterclockwise.
(2) Adjust VR107 (WBL+. OFS) so that the DC voltage at CNI04 (TP1), Pin 6 (RWBL) is -20mV + 10mV.
59