Pioneer XR-P640M, XR-P340M XR-P7 4oM, XR-P64M, XR-P34M xR-P7 4, XR-P64, XR-P340, CH1, YEDS7

Page 37

xR-P7 4o￿M, XR-P64{)M, XR-P34()M xR-P7 4{), XR-P64{), XR-P340

I TrackingServo Loop Gain Adjustment

o Objective

To optimize the tracking servo loop gain.

OSymptom when out of adjustment

oMeasurement Instrument Connections

lProcedurel

Playback does not start, during searchesthe actuator is noisy, or tracks are skipped.

SeeFig. 5.

o

Player State

Test mode,play

ISettings]

o

Adjustment Location

vR8151(TRK GAN)

CH1

 

 

 

50mVzldivision

o

Disc

YEDS_7

X-Y mode

 

 

 

CHz

 

 

 

20mVzldivision

 

 

 

1. Set the AF generatoroutput to l.2kHz and 2Vp-p.

2 . PresstheMANUAL/TRACKSEARcHFwD>> . >>!keyorREV!<< . << ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

halfway acrossthe di5g(ft:35mm), then pressthe DOLBY NR key, thePLAY /PAUSE >/llkey twice in that order to close the corresponding servos and put the player into play mode.

3. Adjust VR8151 (TRK GAN) so that the Lissajous waveform is symmetrical about the X axis and the Y axis.

( 1 0 :1 )

Pin3 (TRIN)

 

Pin4 (GND)

1.2kHz

( 1 0 :t 1 2 V P - P

 

Pin2 (TRER)

 

0.001uF

Low pass filter

Fis.

Tracking Gain Adjustment

ffi

HighergainOptimumgainLower gain

1 - 3 7

Image 37
Contents P74M XR-P74M, XR-P64M, XR-P34M xR-P7 &, XR-pOaO, XR-P34 SafetyinformationA F E T YP R E C a U T I O N S Labetcheck Forcd Multi XR-P74OM, XR-P64OM, XR-P34OM xR-P7 N, XR-P64, XR-P34CLASS1vrsr8r,ErAsER Laserproduct RA0tATtotwHHrloPtN Forcd SingleXR-P74M, XR-P64M, XR-P340M xR-P7 Q, XR-P64, XR-P3@ SpecfcationsFM/AM tun.r slstion FMTunrrSoction XR-P74OM, XR-P64OM, XR-P34OM R-P7 Q. XR-P6@, XR-P34O PanelfacilitiesReceiver Tapedeck XR-P74M, XR-P621M, XR-P34M xR-P7 &, XR-P64, XR-P340@oor--ev.NRoN/OFFbuttonXR-P3/o/XR-P3/0Monly Tapedeck MULTI-PIAYCDPLAYER Cdplayer6l VOLUME-/+l buttons @ Numberbuttons Remotecontrolunit O PowER butron @ Functionbutton FunciXR-P74M, XR-P64M, XR-P340M xR-P7 N, XR-P640, XR-P34 SleepXR-P74M, XR-P640M, XR-P34M xF-P7 40, XR-P640, XR-P34 DisassemblyPoweramp Modulesection BlockdiagramXR-P740M, XR-P640M, XR-P340M xR-P740, XR-P64J--,XR-P34.o OVT lXR-P740M, XR-P64M, XR-P340M xR-P7 44, XR-P640, XR-P34 Pin Functionof Power Amo ModuleTzv +t2vXR-P740M, XR-P640M, XR-P34M xR-P7 40, XR-P64trJ, XR-P340 IC InformationRc9268F ilc84o1 AF cD AssY PinAssignment ViewSystem Control Micro-computer o PinAssignmentTopView XR-P740M, XR-P640M, XR-P340M xR-P7 40, XR-P6 Q, XR-P340So1 FIPs 7GFIP21 P1o/KO3 P XR-P74M, XR-P640M, XR-P34M xR-P7 &, XR-P640, XR-P34PinAssignmentTop View XR-P7@M, XR-P640M, XR-P340M xR-P7 &, XR-P64J, XR-P340PLL9162 XR-P74OM, XR-P64OM. XR-P34OM xR-P7 &, XR-P64, XR-P3460 FIP26 P1s/KO8 P PDGtoSA ADDoN Iflc3951 DtspLAyAssy XR-P740M, XR-P640M, XR-P34M xR-P7 Q, XR-P64, XR-P340ExceptXR-P34OM and XR-P34Ol System Control Micro-computer a PinFunctionOuty Lnverter PinAssignmentTopViewDolby OFF P7 4OM. XR-P64OM, XR-P34OM xR-P74, XR-P64, XR-P340 TSnnill fltNfifrl\VlltFrllN S KAIRAIKE\XR.-P7 4AM, XR-P640M, XR-P340M PR@XR-P74, XR-P64, XR-P340 Lnvzool v3951 ADDoN DtspLAyAssylXR-P7@M, XR-P64OM, XR-P3@M xR-P7 40, XR-P64, XR-P34 AdjustmentsTunersection FM TunerSectionHandlingPrecautions Poweramp MODULESECTTONReferto Fig .2 1Adjustment and Confirmationof ldle Current XR-P74OM. XR-P64OM, XR.P34OM xR.-P7 4o-, XR-P64HJ,XR-P340RearAmp Side REAR,PWR,PRTECASSY XR-e2461y1, XR-P640M, XR-P34M R-P7 Q, XR-P64O, XR-P34ORemarks Donot opemteSurroundAmp7 E o XR-P74O/M. XR-P64OM. 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