Cd Section; Tel 13942296513 - Sony HCD-M333 Service Manual

QQ
3 7 63 1515 0

CD SECTION

Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩ 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.
RF Level Check
BD (CD) BOARD
Procedure :
1. Connect an oscilloscope to TP (RFAC) and TP (DVC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
Note: Clear RF signal waveform means that the shape "◊" can be
clearly distinguished at the center of the waveform.
TE
L 13942296513
www
.
http://www.xiaoyu163.com
oscilloscope
TP(RFAC)
TP(DVC)
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.1 ± 0.3Vp-p
x ao u163
y
i
http://www.xiaoyu163.com
2 9
8
E-F Balance (1 Track jump) Check
BD (CD) BOARD
TP (TE)
TP (DVC)
Procedure:
1. Connect an oscilloscope to TP (TE) and TP (DVC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback the number five track.
Press the CD u button. (Becomes the 1track jump mode.)
4.
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
0V
level=1.1 ± 0.6Vp-p
Specification level:
Q Q
3 6 7 1 3 1 5
Ajustment Location :
[BD (CD) BOARD] — SIDE A —
co
.
HCD-M333
9 4 2 8
Oscilloscope
B
A (DC voltage)
Symmetry
A
x 100=less than ±22%
B
0 5 8 2 9 9 4 2 8
TP (RFAC)
IC103
IC101
IC104
TP (TE)
TP (DVC)
m
9 9
Center of
waveform
9 9
35