Pioneer PD-M603 Manuale di servizio - Pagina 20

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PD-M603

8. ADJUSTMENTS

8.1. Adjustment Methods

If a disc player is adjusted incorrectly or inadequately, it may malfunction or not work at all even though there is

nothing at all wrong with the pickup or the circuitry. Adjust correctly following the adjustment procedure.

@ Adjustment Items/Verification Items and Order

If the specified values cannot be obtained or no adjustment is possible by performing the verifications or adjustments

described in steps 1 — 4, the pickup block may be defective.

TPI, PinS(FCS. IN)

Focus servo loop gain adjustment

TPI, Pin6(FCS. ERR)

R152(FCS. GAN)

TP1, Pin3(TRK. IN)

TP1, Pin2(TRK. ERR)

VaR)

@ Abbreviation table

FCS. ERR _ :Focus Error

TRK. ERR

:Tracking Error

FCS GAN _ :Focus Gain

TRK GAN

: Tracking Gain

FCS. IN

:Focus In

TRK.IN

— :Tracking In

Tracking servo loop gain adjustment

aed

eas

@ Measuring Instruments and Tools

1. Dual trace oscilloscope (10:1 probe)

2. Low-frequency oscillator

3. Test disc (YEDS - 7)

4. Low pass filter (39k Q +0.001 uF)

5. Resistor (100 k22 )

6. Standard tools