Filter
Top Products
XR-P740M,
XR-P64()M,
XR-P34()M
xR-P74{),
XR-P64(), XR-P34()
6. CD SECTION
{FOR
CD MULTI AND
CD SINGLE)
I
Adiustment Methods
If
a disc
player
is
adjusted incorrectly or inadequately, it may
malfunction or not work at all even though tlere is nothing at
aU wrong with the
pickup
or the circuitry. Adjust correctly
foUowirg the adjustment
procedure.
a Adjustment ltems/Vefitication ltems
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.
O
Abbreviation Table
FOER :Focus Error
TRER : Tracking Error
FCS GAN : Focus Gain
TRK GAN : Tracking Gain
FOIN
: Focus In
TRIN
: Tracking In
O
Measuring Instruments and Tools
1. Dual trace oscilloscope
(10
:
I
probe)
2. Low-frequency oscillator
3. Test disc ffEDS-Z)
4. Low
pass
filter
(39kO
+ 0.0019F)
5.
Resistor
(100kO)
6. 8cm disc
(With
at
least about 20 minutes oI recording)
7. Ball
point
hexagon
wrench
(GGK1002)
8. Standard tools
Step
Item
Test Point Adiustment Location
1 Focus offset verification TPl, Pin6
(FOER)
None
2 Tracking error balance verification TPl, Pin2
(TRER)
None
3
Pickup radial/tangential
direction tilt
adjustment
TP1, Pinl
(RF)
Radial tilt adjustment screw,
Tangential titt adjustment screv/
RF level
veriJication
TPl, Pinl
(RF)
None
Focus servo loop
gain
adiustment
TP1, Pin5
(FOIN)
TP1, Pin6
(FOER)
VR8152
(FCS
GAN)
6 Tracking servo loop
gain
adjustment
TPl, Pin3
(TRIN)
TPl, Pin2
(TRER)
VR8151
(TRK
GAN)
1-28