Sony CDP-CX455 Service Manual ▷ View online
25
CDP-CX455
Mechanical Adjustments
Pop Up Mechanism Adjustment
1.
Turn on the power and set the disc to number 24.
2.
With the power ON, while pres sing the TIME and MEGA
CONTROL buttons, press the 1/u button to enter the test mode.
CONTROL buttons, press the 1/u button to enter the test mode.
3.
Rotate the JOG dial and select “CDM Test”.
Press the JOG dial.
Press the JOG dial.
4.
Rotate the JOG dial and select the mechanism adjustment mode.
(“Mech Adjust” is displayed.)
Press the JOG dial.
(“Mech Adjust” is displayed.)
Press the JOG dial.
5.
Keep pressing the TOP ARTIST 1 button to operate the loading
mechanism, and continue pressing until the disc table locks.
(Fig. 1)
mechanism, and continue pressing until the disc table locks.
(Fig. 1)
6.
Keep pressing the TOP ARTIST 2 button to raise the pop up
part.
part.
7.
Loosen the adjusting screw, move the screwdriver left and right
until the lever (POP UP) does not touch the slit wall, and secure
the screw. (Fig. 2)
until the lever (POP UP) does not touch the slit wall, and secure
the screw. (Fig. 2)
The following buttons have special functions in this mode.
TOP ARTIST 1 button: Loading mechanism IN operation
TOP ARTIST 5 button: Loading mechanism OUT operation
TOP ARTIST 2 button: Pop up part UP operation
TOP ARTIST 6 button: Pop up part DOWN operation
TOP ARTIST 5 button: Loading mechanism OUT operation
TOP ARTIST 2 button: Pop up part UP operation
TOP ARTIST 6 button: Pop up part DOWN operation
At this position,this
part will be locked.
part will be locked.
Lever (POP-UP 400)
Fix to the center so that the
lever (POP-UP 400) does
not touch the slit.
lever (POP-UP 400) does
not touch the slit.
Cover (chassis 400)
Fig. 1
Fig. 2
SECTION 5
ADJUSTMENTS
Table Sensor Adjustment
1.
Enter the CDM Test mode and select “Mech Adjust” with the
JOG dial, and press the dial.
JOG dial, and press the dial.
2.
Press the TOP ARTIST 1 button to operate the loading mechanism,
and continue pressing until the disc table locks. (Fig. 3)
and continue pressing until the disc table locks. (Fig. 3)
3.
Loosen the fixing screw and move the holder so that both PLAY
button LED (green) and the ALBUM SELECT button LED
(green) light.
If the holder is not in the correct position, the MEGA
CONTROL button LED (orange) or the PAUSE button LED
(orange) lights.
button LED (green) and the ALBUM SELECT button LED
(green) light.
If the holder is not in the correct position, the MEGA
CONTROL button LED (orange) or the PAUSE button LED
(orange) lights.
4.
Moving the disc table right and left with a hand after the screw
is fixed, the table will move by the play of a disc table. If the
LEDs light up alternately, the adjustment will be performed
correctly. (Fig. 4)
is fixed, the table will move by the play of a disc table. If the
LEDs light up alternately, the adjustment will be performed
correctly. (Fig. 4)
MEGA CONTROL
ALBUM SELECT
Fig. 3
Fig. 4
Holder (table sensor 400)
S tight, screw
(PTTWH 3
(PTTWH 3
×
6)
Swing
Table (400) assembly
At this position,this
part will be locked.
part will be locked.
26
CDP-CX455
Electrical Adjustment
Note:
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
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 10M
Ω 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.
when the signal level is low than specified value with the
following checks.
S-Curve Check
Procedure :
1.
1.
Chuck the disc (YEDS-18) beforehand.
2.
Connect oscilloscope to test point TP (FE1) on BD board.
3.
With the power ON, while pressing the TIME and MEGA
CONTROL buttons, press the
CONTROL buttons, press the
1/u button.
Rotate the DISC/ALBUM/CHARACTER dial, select “BU
Test” and press the dial.
Test” and press the dial.
4.
Rotate the DISC/ALBUM/CHARACTER dial, and select “bdt
S CURVE”. Press the dial “LD AL” is displayed.
S CURVE”. Press the dial “LD AL” is displayed.
5.
Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 3±1
Vp-p.
between A and B. And confirm peak to peak level within 3±1
Vp-p.
S-curve waveform
6.
Pressing the MENE/NO button stops the output of the
waveform (S CURVE). “bdt S CURVE”is displayed.
waveform (S CURVE). “bdt S CURVE”is displayed.
7.
To end this mode, press the ?/1 button.
Note : • Try to measure several times to make sure than the ratio of
A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
Adjustment Location: BD board (See page 28)
RF Level Check
oscilloscope
BD board
TP (FE1)
TP (DVC)
TP (DVC)
symmetry
A
B
Within 3
±
1 Vp-p
VOLT/DIV : 1V
TIME/DIV : 400
TIME/DIV : 400
µ
s
oscilloscope
BD board
TP (RFAC)
TP (DVC)
TP (DVC)
VOLT/DIV : 500mV
TIME/DIV : 1
TIME/DIV : 1
µ
s
level : 1.2 Vp-p
+0.25
–0.20
–0.20
Procedure :
1.
1.
Connect oscilloscope to test point TP (RFAC) on BD board.
2.
Turn Power switch on.
3.
Put disc (YEDS-18) in to play the number five track.
4.
Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
signal level is correct or not.
Note: A clear RF signal waveform means that the shape “
◊” can be
clearly distinguished at the center of the waveform.
RF signal waveform
Adjustment Location: BD board (See page 28)
27
CDP-CX455
1.
Connect the oscilloscope to Pins 1, 2, and 3 of TP1 of the
MAIN board.
MAIN board.
2.
Check that no discs are loaded in the unit.
3.
With the power ON, while pressing the TIME and MEGA
CONTROL buttons, press the
CONTROL buttons, press the
1/u button. Rotate the DISC/
ALBUM/CHARACTER dial, select “CDM Test” and press the
dial.
Rotate the DISC/ALBUM/CHARACTER dial and select
“TableRotation” and press the dial.
The disc table starts to rotate in the clockwise direction.
dial.
Rotate the DISC/ALBUM/CHARACTER dial and select
“TableRotation” and press the dial.
The disc table starts to rotate in the clockwise direction.
4.
Loosen the fixing screw, move the mounting board (SENSOR),
and secure the mounting board (SENSOR) at the point the H
portion of the H-H waveform comes the center of the H portion
of the D.SENS waveform.
and secure the mounting board (SENSOR) at the point the H
portion of the H-H waveform comes the center of the H portion
of the D.SENS waveform.
Disc Sensor Adjustment
Be sure to perform this adjustment after sensor adjustment in
MECHANICAL ADJUSTMENT.
MECHANICAL ADJUSTMENT.
Connection:
Waveform:
5.
Rotate the DISC/ALBUM/CHARACTER knob in the
counterclockwise direction and the disc table starts to rotate in
the same direction. Check that the waveform at this time is the
same as that in step 4. If larger by a considerable extent, rotate
the DISC/ALBUM/CHARACTER knob in the clockwise
direction and the disc table starts to rotate in the same direction.
Repeat from step 4.
counterclockwise direction and the disc table starts to rotate in
the same direction. Check that the waveform at this time is the
same as that in step 4. If larger by a considerable extent, rotate
the DISC/ALBUM/CHARACTER knob in the clockwise
direction and the disc table starts to rotate in the same direction.
Repeat from step 4.
6.
Rotate RV501 of the MAIN board and adjust so that the H and
L portions of the D.S waveform become the same.
L portions of the D.S waveform become the same.
S tight, screw
(PTTWH 3
(PTTWH 3
×
6)
D. sens (out) board
D.SENS
H-H
CH1
CH2
D.SENS
H-H
CH1
CH2
Should be at the center
D.SENS
CH1
Adjust so that these widths
become the same.
become the same.
D.SENS OUT: Pin
1
GND: Pin
2
H-H OUT: Pin
3
oscilloscope
CH1 CH2
D.SENS OUT
GND
H-H OUT
GND
H-H OUT
MAIN board
TP1
Adjustment Location: MAIN board (See page 28)
Spray Mode
• This mode is used for the measurement of the table sensor signal
outputs characteristics.
Procedure :
1.
1.
Check that no discs are loaded in the unit.
With the power ON, while pressing the TOP ARTIAT 8 and
H buttons, press the +100 button.
“Spray Mode” is displayed.
With the power ON, while pressing the TOP ARTIAT 8 and
H buttons, press the +100 button.
“Spray Mode” is displayed.
2.
Press the H button to start the measurement. “Now ···ing” is
displayed during the measurement of one rotarion.
displayed during the measurement of one rotarion.
3.
The result of the measurement is displayed as below.
4.
To end this mode, press the
1/u button.
DISC
CD TEXT
1
CD2
GROUP
NO DELAY
MULTI
PROGRAM 1 2 3 X-FADE
DELETE
CD3
REPEAT
SHUFFLE
1
SEC
STEP
MIN
ART.
GROUP
TRACK
HIT
ART.
NEXT
2nd
P = 3 .6 V b = 1 .4 V
Minimum value
of the peak at the
High/High part of
TSENS1/TSENS2
of the peak at the
High/High part of
TSENS1/TSENS2
Maximum value
of the bottom at the
LOW/LOW part of
TSENS1/TSENS2
of the bottom at the
LOW/LOW part of
TSENS1/TSENS2
display
28
CDP-CX455
[ BD BOARD ] – Conductor Side –
Adjustment Location :
[ MAIN BOARD ] – Component Side –
TP(FE1)
TP(DVC)
TP(RF AC)
IC 103
IC 101
TP1
TP(AFADJ)
GND
TP(ADJ)
1
3
RV501
DISC SENSOR
ADJUSTMENT
DISC SENSOR
ADJUSTMENT
IC501
IC504
– Conductor Side –
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