Pioneer PD-M602/KUXJ Service Manual - Page 20

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8. ADJUSTMENTS

8.1. Adjustment Methods

PD-M602

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.

Focus offset verification

TP1, Pin 6(FCS. ERR)

Tracking error balance verification

TP1, Pin2(TRK. ERR)

Noes

Pickup radial/tangential direction tilt

TP1, Pin 1 (RF)

tilt adjustment screw,

adjustment

Tangential tilt adjustment screw

| 4 | RF level verification

TP1, Pin 1 (RF)

fNoe

TP, Pin5(FCS. IN)

Focus servo loop gain adjustment

TP1, Pin6(FCS. ERR)

R152 (FCS. GAN)

TP1, Pin3(TRK. IN)

ae Tracking servo loop gain adjustment

TP1, Pin2(TRK. ERR)

R151 (TRK. GAN)

@ 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 kQ )

6. Standard tools

FCS. ERR

TRK. ERR

FCS GAN

TRK GAN

FCS. IN

TRK. IN

@ Abbreviation table

'Focus Error

:Tracking Error

'Focus Gain

'Tracking Gain

:Focus In

:Tracking In