XR-P740M, XR-P64()M, XR-P340M xR-P7 &, XR-P64(), XR-P34()

I FocusOffset Verilication

. Objective

Verify the DC offset for the focuserror amp.

aSymptomwhenout The modeldoesnot focusin andthe RF sigaalis dirty. of adjustment

a Measurement

Connectthe oscilloscopeto

a

Player State

Test mode, stopped

Instrument

TPl, Pin6(FOER)

 

 

(just the Power switch on)

Connections

 

 

 

 

 

[Settings] SmVldivision

a

Adjustment Location

None

 

l0ms7/division

 

 

 

 

DC mode

a

Disc

None needed

IProcedurel

Verify the DC voltageat TPl, Pin6FOER) is 0tsOmV.

Note: If the specified values cannot be obtained or no adjustment is possible by pertorming the veifications or adjustments described in adjustment items 1-4, the pickup block may be defective.

I TrackingErrorBalanceVerification

. Objective To verify that there is no variation in the sensitivity of the tracking photo diode.

aSymptomwhen out Play does not start or track searchis impossible. of adjustment

a Measurement

Connect the oscilloscope to

a PlayerState

Test mode, focus and spindle

Instrument

TPl,

Pin2 (TRER). This

 

servos closed and tracking

servo

Connections

connection may be Yia a low

 

open.

 

 

passfilter.

 

 

 

 

 

 

a Adjustment Location

None

 

 

[Settings] 50mV7/division

a Disc

YEDS_7

 

 

 

5ms7/division

 

 

 

DC mode

 

 

 

lProcedurel

 

 

 

 

 

1. Movethe pickupto midwayacrossthe disc(R:35mm) with the MANUALz/TRACK SEARCHFWD >>.

>>l

key or REV i{<1

. <l{

key.

 

 

 

2.Pressthe DOLBYNR key,thenthe PLAY7/PAUSEFutl key in thatorderto closethefocusservothenthespindle serYo.

3.Line up thebright line (ground)at the centerof the oscilloscopescreenandput the oscilloscopeinto DC mode,

4.Supposingthatthepositiveamplitudeof thetrackiqgerrorsignalat TP1,pin2(TRER)is (A)andthenegatiyeamplitude is (B). the following expressionis satisfied.

When

When

o = t , + ' ] = o . r

A . B , ? ' ] s o . r

When lhsrg is a DC compon€nt

Whon thero is no DC componenr

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Pioneer XR-P740M, XR-P64M, XR-P340M xR-P7 &, XR-P64, XR-P34, FocusOffset Verilication, TrackingErrorBalanceVerification