Cd Section - Sony CXFD-S03CP Service Manual

CFD-S03CP/S03CPL
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3 7 63 1515 0

CD SECTION

Note:
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
BD90 board
TP (RFI)
TP (VC)
Test Point:
TE
L 13942296513
VC
C122
R140
C123
R143
TP121
B8
RFI
C144
C105
C148
C149
C104
R146
R148
C150
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oscilloscope
(DC range)
+
–
TP (VC)
TP (RFI)
M401
M
(SPINDLE)
S201
(LIMIT)
R402
IC401
R139
R127
R126
R415
C153
R125
C112
C108
R114
R113
IC101
R145
R153
R147
R149
R150
R104
C113
C132
C103
R106
R101
C126
R102
C127
CN301
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Procedure :
1. Connect oscilloscope to TP (RFI) and TP (VC) on the BD90
board.
2. Press the POWER button to turn the power ON, and press
the Z PUSH OPEN/CLOSE button to open the CD disc tray.
3. Set disc (YEDS-18) on the tray and press the u (CD) button
to playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
Q Q
3 6 7 1 3
B7
C403
C404
M402
(SLED)
M
R210
R209
R218
R208
R219 R207
R220
R206
R221
R205
R222
R204
R223
R203
R157
R156
R108
B9
R202
u163
.
2 9 9 4 2 8
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2 ± 0.3 Vp-p
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9