CDP-C5CS
SECTION 5
ELECTRICAL ADJUSTMENTS
NOTE:Procedure:
1. CD Block is basically designed to operate without adjustment.1. Set the test disc (PATD-012). Disc chucking operation is
Therefore, check each item in order given.complete, then pr[POWER]ess the button to turn the power
2. Use PATD-012 disc (4-225-203-01) unless otherwise indicated.off.
3. Use an oscilloscope with more than 10M& impedance.2. Connect an oscilloscope to test point TP (RFDC) and TP (VC)
4. Clean the object lens by an applicator with neutral deteron the BD board.gent
when the signal level is low than specified v3.alue with theConnect between test point TP (ADJ) on the MAIN board and
following checks.GND by lead wire.
4. Press the [POWER] button to turn the power on and enter the
S Curve CheckADJ mode, then playback the number two track automatically.
Connection:5. Confirm that oscilloscope waveform is clear and check the
level of between RFDC top and VC is correct or not.
oscilloscope
NOTE: A clear RFDC signal waveform means that the shape E�O
BD boardcan be clearly distinguished at the center of the waveform.
RFDC signal waveformTP (FE1)+
TP (VC)�
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
Procedure:
1. Set the test disc (PATD-012). Disc chucking operation is com-
plete, then pr[POWER]ess the button to turn the power off.
2. Connect an oscilloscope to test point TP (FE1) and TP (VC)
level: 1.15 ? 0.35 Vp-p
on the BD board.
3. Connect between test point TP (ADJ) on the MAIN board and
GND by lead wire.
4. Press the [POWER] button to turn the power on and enter the
ADJ mode.
VC
Then playback the number two track automatically, press the
x button to stop the playback.
5. Press the [CHECK] button actuate the focus search. (actuaChecking Location:te BD board
the focus search when disc table is moving in and out)
6. Check the oscilloscope waveform (S-curve) is symmetrRFAC Level Checicalk
between A and B. And confirm peak to peak le? 1 vel within 2 Connection:
Vp-p.
oscilloscope
S-curve waveformBD board
TP (RFAC)+
TP (VC)�
symmetry
Procedure:
1. Set the test disc (PATD-012). Disc chucking operation is
A
complete, then pr[POWER]ess the button to turn the power
within 2 ? 1 Vp-p
off.
B
2. Connect an oscilloscope to test point TP (RFAC) and TP (VC)
on the BD board.
NOTE: Y Try to measure several times to make sure than the r3.Connect between test point atioTP (ADJ) on the MAIN board and
of A : B or B : A is more than 10 : 7.GND by lead wire.
Y Take sweep time as long as possible and light up the4. Press the [POWER] button to turn the power on and enter the
brightness to obtain best waveform.ADJ mode, then playback the number two track automatically.
5. Confirm that oscilloscope waveform is clear and check RFAC
Checking Location: BD board
signal level is correct or not.
NOTE: A clear RFAC signal waveform means that the shaE�pe O
RFDC Level Check can be clearly distinguished at the center of the waveform.
Connection:
RFAC signal waveformVOLT/DIV: 200 mV
TIME/DIV: 500 ns
oscilloscope
BD board
TP (RFDC)+level: 1.35 ? 0.4 Vp-p
TP (VC)�
Checking Location: BD board
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ACEC
