Pioneer PD-M423 Manual de serviço - Página 15
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PD-M423, PD-M403
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.
[sep [
mem —~—~S—*dCSSCeat
Point
|__Adlutnant Location
pe!) Focus offset verification
TP1, Pin6(FCS. ERR)
oa
Tracking error balance verification
TP1, Pin2(TRK. ERR)
Pickue radial/tangential direction tilt
TP1, Pin 1(RF)
Radial as adjustment screw,
adjustment
Tangential tilt adjustment screw
;
Pani
TP1, Pin S(FCS. IN)
'
Vv
:
8
| Focus servo loop gain adjustment
TP1, Pin 6(FCS. ERR)
R152(FCS. GAN)
:
d a
a t
TP1, Pin3(TRK. IN)
Vv
:
ae Tracking servo loop gain adjustment
TP1, Pin2(TRK. ERR)
R151 (TRK. GAN)
@ 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
@ 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 u F )
5. Resistor (100 kQ )
6. Standard tools
25