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Model
CDP-XE570
Pages
29
Size
5.62 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cdp-xe570.pdf
Date

Sony CDP-XE570 Service Manual ▷ View online

9
CDP-XE570
4-3. ADJ MODE
The following operations are performed in the ADJ mode, which is
set by connecting the TP1 (ADJ) terminal to the Ground and turning
on the power.
Table of Button Operations in ADJ Mode
The functions of the buttons are shown in the following table.
Function of Buttons
NOTE : Other buttons are not used for servicing and should not
be pressed without a reason.
Button
TIME/TEXT
M
m
CLEAR
Function
Tracking servo ON/OFF
OFFSET(VC)/EF.BIAS display
OFFSET(RF,FE,TRK) display
RFCK/GFS/ERROR RATE check mode
TP2
AFADJ
TP1
ADJ
GND
S531
l
 AMS 
L
[ DISPLAY BOARD ] – Conductor side –
10
CDP-XE570
Procedure :
1.
Connect oscilloscpe to test point TP (TE1) and TP (VC) on
BD BOARD.
2.
Turn Power switch on.
3.
Put disc (PATD-012) in to play the number five track.
4.
Press the  X  (Pause) button. (Becomes the 1 track jump mode)
5.
Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
E-F Balance Check
Procedure :
1.
Connect the test point TP1 (ADJ) on DISPLAY BOARD to
the ground with a lead wire on main board.
2.
Connect oscilloscpe to test point TP (TE1) and TP (VC) on
BD BOARD.
3.
Turn the Power switch on to set the ADJ mode.
4.
Put disc (PATD-012) in to play the number five track.
5.
Press the [TIME/TEXT] button. (The tracking servo are turned
OFF.)
6.
Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Traverse waveform
oscilloscope
BD board
TP (TE1)
TP (VC)
0V
level :  1.15 
±
 0.5 Vp-p
A (DC voltage)
Center of the waveform
B
0V
C (DC 
voltage)
Tracking servo
OFF
Tracking servo
        ON
SECTION 5
ELECTRICAL BLOCK CHECKING
Note:
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2.
Use PATD-012 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10M
 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.
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.35 
±
 0.4 Vp-p
oscilloscope
BD board
TP (TE1)
TP (VC)
0V
level : 1.15 
±
 0.5Vp-p
A (DC voltage)
Center of the waveform
B
symmetry
RF Level Check
oscilloscope
BD board
TP (RF AC)
TP (VC)
Procedure :
1.
Connect oscilloscope to test point TP (RF AC) and TP (VC) on
BD BOARD.
2.
Connect the test point TP1 (ADJ) on DISPLAY BOARD to the
ground with a lead wire.
3.
Turn Power switch on.
4.
Put disc (PATD-012) in to play the number five track.
5.
Press the [CLEAR] buton and select the RFCK function.
6.
Confirm that oscilloscope waveform is clear and check RF
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
E-F Balance (1 Track Jump) Check
     1 track jump waveform
7.
Press the [TIME/TEXT] button. (The tracking servo are turned
ON.) Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 6.
Traverse waveform
8.
Disconnect the lead wire of TP1 (ADJ) connected in step 1.
11
CDP-XE570
[ BD BOARD ] – Side B –
Adjustment Location :
[ DISPLAY BOARD ] – Conductor side –
CN102
IC101
TP(FE1)
TP(TE1)
TP(VC)
TP(RF AC)
TP2
AFADJ
TP1
ADJ
GND
S531
l AMS L
12
CDP-XE570
SECTION  6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
KEY board
DISPLAY board
HEADPHONE board
MAIN board 
BD board
LOADING board
POWER SW board
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