Pioneer PD-P920M Service Manual page 23

PD-PS20KNvl
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
le ee Coen ie onmate
5 RF level adjustment TP1, Pin 1 (RF) VRI (RF level)
6
TP1, Pin5(FCS. IN)
TP1, Pin6(FCS. ERR) MRE RES Cen)
Tracking servo loop gain adjustment ne: aaa an VRIS1 (TRK. GAN)
Za Focus error signal verification TP1, Pin6(FCS. ERR) a
@ Abbreviation table
FCS. ERR :Focus Error
FCS. OFS _ :Focus Offset
TRK. ERR :Tracking Error
TRK. BAL :Tracking Balance
FCS GAN _ :Focus Gain
TRK GAN :Tracking Gain
FCS. IN :Focus In
TRK. IN 'Tracking In
Focus servo loop gain adjustment
@ Measuring Instruments and Tools
1. Dual trance oscilloscope (10:1 probe)
2. Low-frequency oscillator
3. Test disc (YEDS~ 7)
4. Low-pass filter (39 kQ + 0.001 yu F)
5. Resistor (100 kQ )
6. Standard tools
2a.