COVER/CIR/EXP-INT 98.4.24 2:57 PM y[W 6
DPC-885
ADJUSTMENT
INPUTOUTPUTPLAYERALIGNMENT
No.ITEMALIGN FORFIG.
SETTINGSETTINGSETTINGPOINT
On the power from
Apply the sensor Short the test land. Confirm0.08 to 0.15 mW,
section of optical that the display iswhen the diffraction
LASER
1�power meter on" ".�grating is correctly�
POWER
the Press FF Key and confirmaligned with the RF
pickup lens.that the display is 03.level of 1.0 Vp-p or
more.
Connect an
oscilloscope as
Press the PLAY key .FE
FOCUSTest discfollows.
2Confirm that the display isBALANCEOptimum eye pattern�
ERRORKTD-03CH1:RF
"05".VR3
(Check-land RF)
CH2:TE1
Connect an
oscilloscope as
TRACKINGTest discfollows.Press the FF key.TESymmetry between
3Confirm that the display is BALANCE�
ERRORKTD-03CH1:RFupper and lower
" ".
(Check-land RF)VR5
CH2:TE1
Test disc
KTD-03 ApplyConnect a LPF
signal ofbetween Check-
Press the PLAY key .FOCUSTwo VTVMs should
FOCUS1.0kHz,land FE1 and FE2
4Confirm that the display isGAINread the same(d)
GAIN0.05Vrmsto which connect an
"05".VR4value.
betweenoscilloscope or AC
Check-landvoltmeters.
FE1 and FE2.
Test disc
KTD-03 ApplyConnect a LPF
signal ofbetween Check-
Press the PLAY key .TRACKINGTwo VTVMs should
TRACKING1.0kHz,land TE1 and TE2
5Confirm that the display isGAINread the same(e)
GAIN0.05Vrmsto which connect an
"05".VR6value.
betweenoscilloscope or AC
Check-landvoltmeters.
TE1 and TE2.
Note: Test DISC KTD-03, TCD-783 or equivalent
LPF : Around 47k1 + 390 pF or so.
Step 1~5 are in Test Mode.
Check-lands andTEST
alignment point
(d) Focus Gain
Two VTVMs should read the same
value.AC voltmeter
FE1
L.P.F
FE2
1.0kHz
GNDL.P.F
0.05Vrms
(e) Tracking Gain
Two VTVMs should read the same
value.
AC voltmeter
RF
TE1
L.P.F
TE2
VR3
1.0kHzTE1
GNDL.P.FTGFBVR6
0.05VrmsFE1VCT.B
FE2TE2 VR5
FG
VR4
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