Adjustment Methods - Pioneer PD-M602 Service Manual

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) a tilt adjustment screw,
adjustment Tangential tilt adjustment screw
| 4 | RF level verification TP1, Pin 1 (RF) fNoe
TP, Pin5(FCS. IN)
Vv
ie Focus servo loop gain adjustment TP1, Pin6(FCS. ERR) R152 (FCS. GAN)
TP1, Pin3(TRK. IN)
Vv
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
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