Pioneer XR-P340M XR-P740M, XR-P640M, XR-P34M xR-P7 40, XR-P64J, XR-P340, LProcedurel, Disc

XR-P740M, XR-P640M, XR-P34()M xR-P7 40, XR-P64{J_, XR-P340

!Pickup Radlal/Tangential Titt Adjustmont (For GD Multil

a Objective	To adjust t}te angle of the pickup relative to the disc so that the laser beams are shone straight
	down into the disc for the best read out of the RF signals.
o Symptom when out	Sound broken; some discs can be played but not others.
of adjustment
o Measurement	Connect the oscilloscopeto	o	Player State	Test mode, play
Instrument	TP1, Pinl (RF).
Connections		o	Adjustment Location	Pickup radial tilt adjustmentscrew
	[Settings] 20mV/division			and tangential tilt adjustment
	200ns7ldivision			screw
	AC mode
		o Disc		YEDS - 7

lProcedurel

1 . PresstheMANUAL/TRACKSEARcHFwD>> . >>!keyorREv<< . << ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

halfway acrossthe disc (R:35mm).

Pressthe DOLBY NR key, thePLAY/PAUSE >/,key twice in that order to closethe respectiveservosand put the player into play mode.

2.First, adjust the radid tilt adjustment screw with a Phillips screwdriver so that the eye pattern (the diamond shapeat the center of the RF signal) can be seen the most clearly.

3.Next, adjust the tangential tilt adjustment screw with a Phillips screv/driver so that the eye pattern (the diamond shape at the center of the RF signal) can be seen the most clearly (Fig. 3).

4.Adjust the radial tilt adjustment screw and the tangential tilt adjustment screw again so that the eye pattern can be seen the most clearly. As necessary,adjust the two screws alternately so that the eye pattern can be seenthe most clearly.

5.When the adjustment is completed, lock the radial and tangential adjustment screw.

Note: Radial and tangential mean the directions relative to the disc shown in Fig. 2.

Radial direction

Tangential direction

d " O I

Disc

Fig.2

1 - 3 3