Pioneer XR-P640M, XR-P340M XR-P740M, XR-P64M, XR-P34M xR-P74, XR-P64, XR-P34, VR8152 Fcsgan

XR-P740M, XR-P64()M, XR-P34()M xR-P74{), XR-P64(), XR-P34()

6. CD SECTION{FORCD MULTIAND CD SINGLE)

I AdiustmentMethods

If a discplayeris adjustedincorrectlyor inadequately,it maymalfunctionor notwork at all eventhoughtlere is nothingat aUwrong with the pickup or the circuitry. Adjust correctly foUowirg the adjustmentprocedure.

a Adjustment ltems/Vefitication ltems and Order

If the specifiedvaluescannotbe obtainedor no adjustmentis possibleby performing the verificationsor adjustments describedin steps1-4, the pickupblockmaybe defective.

Step	Item	Test Point	Adiustment Location
1	Focus offset verification	TPl, Pin6(FOER)	None
2	Tracking error balance verification	TPl, Pin2(TRER)	None
3	Pickup radial/tangential direction tilt	TP1, Pinl (RF)	Radial tilt	adjustment screw,
	adjustment		Tangential	titt adjustment screv/
	RF level veriJication	TPl, Pinl (RF)	None
	Focus servo loop gain adiustment	TP1, Pin5(FOIN)	VR8152(FCSGAN)
		TP1, Pin6(FOER)
6	Tracking servo loop gain adjustment	TPl, Pin3(TRIN)	VR8151(TRK GAN)
		TPl, Pin2(TRER)

O Abbreviation Table

FOER :FocusError

TRER : Tracking Error

FCSGAN : FocusGain

TRK GAN : Tracking Gain

FOIN : FocusIn

TRIN : Tracking In

O Measuring Instruments and Tools

1.Dualtraceoscilloscope(10: I probe)

2.Low-frequencyoscillator

3.TestdiscffEDS-Z)

4.Low passfilter (39kO+ 0.0019F)

5.Resistor(100kO)

6.8cmdisc (With at leastabout20 minutesoI recording)

7.Ball point hexagonwrench(GGK1002)

8.Standardtools

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