Sony CDPXB-740, CDPXB-740-E Service manual
CDP-XB740/XB740E
SERVICE MANUAL
Photo: CDP-XB740
Model Name Using Similar Mechanism CDP-XB720/XB720E
CD Mechanism Type CDM14FLS-5BD25
Base Unit Type BU-5BD25
Optical Pick-up Type KSS-213BA/F-NP
SPECIFICATIONS
AEP Model
CDP-XB740
UK Model
CDP-XB740E
COMPACT DISC PLAYER
1
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 3
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
2. GENERAL ..........................................................................6
3. DISASSEMBLY
3-1. Front Panel ........................................................................... 7
3-2. Base Unit (BU-5BD25)......................................................... 7
4. TEST MODE ....................................................................... 8
5. ELECTRICAL BLOCK CHECKING ........................ 10
6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 12
6-2. Printed Wi ring Board – BD Section –................................. 14
6-3. Schematic Diagram – BD Section – ................................... 15
6-4. Printed Wiring Board – Main Section – .............................. 16
6-5. Schematic Diagram – Main Section – ................................ 17
6-6. Printed Wiring Board – Display Section –..........................18
6-7. Schematic Diagram – Display Section – ............................ 19
6-8. Schematic Diagram – Power/HP Section – ........................ 20
6-9. Printed Wiring Board – Power/HP Section – ...................... 20
6-10. Schematic Diagram – Loading Motor Section –............... 21
6-11. Printed Wiring Board – Loading Motor Section – ............21
6-12. IC Pin Functions................................................................ 22
6-13. IC Block Diagrams............................................................ 26
7. EXPLODED VIEWS
7-1. Case Section........................................................................ 29
7-2. Front Panel Section ............................................................. 30
7-3. Mechanism Deck Section (CDM14FLS-5BD25) ............... 31
7-4. Base Unit Section (BU-5BD25).......................................... 32
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
8. ELECTRICAL PARTS LIST ........................................ 33
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
PARTS No. MODEL
4-997-214-6s
4-997-214-7s
XB740
XB740E
2
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
Insert a tapering driver into the aperture of the unit bottom, and turn
in the direction of arrow.
*
To close the disc table, turn the driver in the reverse direction.
Pull out disc table.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer
electrostatic breakdown because of the potential difference
generated by the charged electrostatic load, etc. on clothing and
the human body.
During repair, pay attention to electrostatic breakdown and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveform is output continuously.
3
CD-TEXT TEST DISC
This unit is able to display the TEXT data (character information)
written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313: J-2501-126-A) is used
for checking the display.
To check, perform the following procedure.
Procedure:
1. Turn ON the power and set the test disc.
2. Press the B button and play back the disc.
3. The following will be displayed on the fluorescent indicator tube.
Display : CD TEXT– – – –
4. Rotate the l AMS L knob to switch the track. The text
data of each track will be displayed.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed properly . These will be displayed as a space or a character resembling it. For details,
refer to “Table 2 : CD-TEXT DISC Recorded Contents and Display”.
Table 1 : CD-TEXT TEST DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters)
TRACK
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Displayed Contents
1kHz/0dB/L&R
20Hz/0dB/L&R
40Hz/0dB/L&R
100Hz/0dB/L&R
200Hz/0dB/L&R
500Hz/0dB/L&R
1kHz/0dB/L&R
5kHz/0dB/L&R
7kHz/0dB/L&R
10kHz/0dB/L&R
16kHz/0dB/L&R
18kHz/0dB/L&R
20kHz/0dB/L&R
1kHz/0dB/L&R
1kHz/-1dB/L&R
1kHz/-3dB/L&R
1kHz/-6dB/L&R
1kHz/-10dB/L&R
1kHz/-20dB/L&R
1kHz/-60dB/L&R
1kHz/-80dB/L&R
TRACK
No.
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Displayed Contents
1kHz/-90dB/L&R
Infinity Zero w/o emphasis//L&R
Infinity Zero with emphasis//L&R
400Hz+7kHz(4:1)/0dB/L&R
400Hz+7kHz(4:1)/-10dB/L&R
19kHz+20kHz(1:1)/0dB/L&R
19kHz+20kHz(1:1)/-10dB/L&R
100Hz/0dB/L*
1kHz/0dB/L*
10kHz/0dB/L*
20kHz/0dB/L*
100Hz/0dB/R*
1kHz/0dB/R*
10kHz/0dB/R*
20kHz/0dB/R*
100Hz Squer Wave//L&R
1kHz Squer Wave//L&R
1kHz w/emphasis/-0.37dB/L&R
5kHz w/emphasis/-4.53dB/L&R
16kHz w/emphasis/-9.04dB/L&R
NOTE : The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.
However, only 8 digits are displayed, and the 9th digit onwards are displayed as “– – – – –”.
4
Table 2: CD-TEXT TEST DISC Recorded Contents and Display
(In this unit, some special characters cannot be displayed. This is no a fault.)
TRACK
No.
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
to
99
Recorded contents Display
! ” # $% & ´ (21h to 27h)1kHz 0dB L&R
( ) + , – . / (28h to 2Fh)
*
01234567 (30h to 37h)
8 9 : ; < = > ? (38h to 3Fh)
@A B C D E F G (40h to 47h)
H I J K L M N O (48h to 4Fh)
P Q R S T U VW (50h to 57h)
X Y Z [ ¥ ] ^ _ (58h to 5Fh)
a b c d e f g (60h to 57h)
′
h i j k l m n o (68h to 6Fh)
p q r s t u v w (70h to 77h)
xyz{I }
i¢£¤¥ § (A0h to A7h) 8859-1
9 C ª
•±23
1
†
º ¿ (B8h to BFh)
~
(78h to 7Fh)
¬
–
PR
µ ¶ • (B0h to B7h)
′
14123
(A8h to AFh)
4
АБВГДЕЖЗ (C0h to C7h)
ИЙКЛМНОП (C8h to CFh)
DСТУФХЦ
ШЩЪЫЬY
˙
(D0h to C7h)
Я (D8h to DFh)
абвгдежз (E0h to E7h)
ийклмноп (E8h to FFh)
∂ стуфхц÷ (F0h to F7h)
шщъыьy я (F8h to FFh)
´
No.66
No.67
to
No.99
···· ! ” # $ % & are not displayed
( ) + – / ···· , . are not displayed
*
01234567····
8 9 = ? ···· : ; < > are not displayed
A B C D E F G ···· @ is not displayed
H I J K L M N O ····
P Q R S T U VW ····
X Y Z [ / ] ^ _ ····
A B C D E F G ····
′
H I J K L M N O ····
P Q R S T U VW ····
X Y Z ···· { I }
¬–
...
.
′
± ····
¿ ···· †
~
are not displayed
····
i ¢ £ ¤ ¥ § are not displayed
···· 9 C ª
P R are not displayed
2 3
µ ¶ • are not displayed
14123
1
º are not displayed
4
АБВГДЕ ···· Æ Ç are not displayed
È É Ê Ë Ì Í Î Ï ····
СТУФХЦ ···· D are not displayed
ÙÚÛÜY ···· Ø
´
ß are not displayed
АБВГДЕ ···· æ ç are not displayed
È É Ê Ë Ì Í Î Ï ····
СТУФХЦ ···· ∂ ÷ are not displayed
ÙÚÛÜY ···· ø ÿ are not displayed
´
T All the same
T All the same
to
T All the same
5
Front Panel
SECTION 2
GENERAL
1
2
345
LOCATION OF PARTS AND CONTROLS
1 POWER switch
2 PLAY MODE button
3 REPEAT button
4 FADER button
5 TIME/TEXT button
6 Disc tray
7 m,M button
8 EDIT/TIME FADE button
9 CHECK button
10 CLEAR button
11 AMS knob (PUSH ENTER)
12 x (stop) button
13 X (pause) button
14 H (play) button
15 A OPEN CLOSE button
16 Window display
17 LANGUAGE button
18 MUSIC SCAN button
19 AUTO SPACE button
20 PEAK SEARCH button
21 FILTER (STANDARD-1-2-3) switch
22 PHONE jack (AEP, AED model)
6
78910
11
16171819202122
13
1215 14
* AMS is the abbreviation for Automatic Music Sensor.
• Abbreviation
AED : North European
6
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. FRONT PANEL
• In order to remove the front panel block when the power supply
does not turn on, rotate the cam with tapering driver as the figure
shows, and the loading part will be moved.
Then pull out the loading part by your hand to remove the loading
panel as the figure shows. After that take out the front panel block.
Tapering driver
Loading panel
Loading part
3-2. BASE UNIT (BU-5BD25)
1 Turn the cam to the direction of
arrow (counter clock wise) by
tapering driver.
3 Yoke bracket
BU-5BD25
4 Remove the Base unit
(BU-5BD25) to the direction
of arrow.
2 Take off the disc table.
7
SECTION 4
TEST MODE
4-1. AF MODE
The following checks can be performed in the AF mode, which is
set by connecting the JW004 (AFADJ) terminal on MAIN
board to the Ground and turning on the power.
• FL tube check
After all segments light up, when the H button is pressed, the
following will be displayed. (Partial lighting 1)
A B C D E F
(Partial lighting 1)
When the x button is pressed, the following will be displayed.
(partial lighting 2)
42
6
16
The display will light up as follows (partial lighting 3) when the
l AMS L knob is rotated to the right, and as follows (partial lighting 4) when rotated to the left.
810
1412
18 20
(Partial lighting 2)
Button
LANGUAGE
MUSIC SCAN
AUTO SPACE
PEAK SEARCH
PLAY MODE
REPEAT
FADER
TIME EDIT
CLEAR
CHECK
• Remote commander check
When buttons other than the H button are pressed when the
whole display is lit, the display will change to partial lighting 2.
When the “H” button is pressed, the display will light up as
follows.
Button No.
Displayed
0
1
2
3
4
5
6
7
8
9
Button
EDIT/
TIME FADE
m
M
X
ENTER (AMS)
OPEN/
CLOSE A
PLAY H
STOP x
Button No.
Displayed
10
11
12
18
20
All lit
Partial lighting 1
Partial lighting 2
REMOCON PLAY
(Partial lighting 5)
JOG RIGHT
(Partial lighting 3)
JOG LEFT
(Partial lighting 4)
When the OPEN/CLOSE A button is pressed, all will light up
again.
• Key check
All buttons have corresponding button numbers. When a button
is pressed, the counter will count up and display the button’ s number. Ho wever , the counter will only count to “16”. It will not count
for buttons already pressed once, but will display the button’s
number.
88 TOTAL= 88
X
Display of button number
X
Display of counting
4-2. ADJ MODE
The following operations are performed in the ADJ mode, which
is set by connecting the JW003 (ADJ) terminal to the Ground and
turning on the power.
Table of Button Operations in ADJ Mode
The functions of the number buttons are shown in the following
table.
Function of Number Buttons
(With the General Remote Commander)
Button
Tracking servo, sled servo off
4
Tracking servo, sled servo on
9
S curve continuous output check mode
11
* NOTE : Other buttons are not used for servicing and should not
be pressed without a reason.
Function
8
4-3. AGING MODE
This unit is equipped with an aging mode to check operations of the
mechanism deck.
• When faults occur:
Aging stops, and the state when aging stopped is displayed on the
fluorescent display tube.
[ MAIN BOARD ] – Component Side –
• When no fault has occurred:
Aging is continued repeatedly.
Aging method 1
(When using the aging mode remote controller (J-2501-123-A)):
1. Press the POWER button and turn ON the power.
2. Set the disc on the tray.
3. Press the A GING START button of the aging remote controller .
4. Aging starts and the message shown in Fig. 1 is displayed on the
fluorescent display tube.
5. To end, press the POWER button.
Aging method 2 (When no aging mode remote controller):
1. Press the POWER button and turn ON the power.
2. Set the disc on the tray.
3. Press the A OPEN/CLOSE button, x button, and MUSIC
SCAN button at the same time. (If these buttons are not pressed
at the same time, nothing performs.)
4. Aging starts and the message shown in Fig. 1 is displayed on the
fluorescent display tube.
5. To end, press the POWER button.
Fig. 1 Message in Aging Mode
Code
No.
0
Load in
1
Access to TOC
2
Access to last track
3
Playback of last track
(3 seconds)
4
Access to first track
5
Playback of first track
(3 seconds)
6
Load out
State
Display when
normal
AGING-0
AGING-1
AGING-2
Counter display
AGING-4
Counter display
AGING-6
Display when
abnormal
ERROR-0
ERROR-1
ERROR-2
ERROR-3
ERROR-4
ERROR-5
ERROR-6
JW004
(AFADJ)
JW003
(ADJ)
CN302
9
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 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.
S Curve Check (With general remote commander)
oscilloscope
BD board
TP (FE)
TP (VC)
Procedure :
1. Connect oscilloscope to test point TP (FE) on BD board.
2. Connect the test point JW003 (ADJ) on MAIN board to the
ground with a lead wire.
3. Turn ON the power.
4. Put disc (YEDS-18) in press H (play) button.
5. When the 11 button of the remote commander is pressed, the S
curve will be output continuously.
6. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 3
+ 1.5
– 1
Vp-p.
S-curve waveform
symmetry
S-curve waveform
symmetry
A
Within 3.8 ± 1.1 Vp-p
B
7. After check, remove the lead wire connected in step 2 and 3.
Note :
• Try to measure several times to mak e sure than the r atio 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.
RF Level Check
oscilloscope
BD board
TP (RF)
TP (VC)
Procedure :
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turn ON the power.
3. Put disc (YEDS-18) in to play the number five track.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
A
B
+ 1.5
Within 3 Vp-p
– 1
7. After check, remove the lead wire connected in step 2.
Note :
• Try to measure sev eral times to make sur e 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.
S Curve Check (Without general remote commander)
oscilloscope
BD board
TP (FE)
TP (VC)
Procedure :
1. Connect oscilloscope to test point TP (FE) on BD board.
2. Connect between test point TP (FEI) and TP (VC) by lead wire.
3. Connect both ends of TP R151 of the BD board to the lead wire.
4. Turn ON the power.
5. Put disc (YEDS-18) in and actuate the focus search. (actuate the
focus search when disc table is moving in and out.)
6. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And conf irm peak to peak le vel within 3.8 ± 1
Vp-p.
Note:
A clear RF signal waveform means that the shape “◊” can be clearly
distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.2 ± 0.2 Vp-p
E-F Balance (1 Track Jump) Check
(Without general remote commander)
oscilloscope
BD board
TP (TE)
TP (VC)
Procedure :
1. Connect oscilloscpe to test point TP (TE) on BD board.
2. Turn ON the power.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the X (Pause) button. (Becomes the 1 track jump mode)
5. Check the lev el B of the oscilliscope's wa v eform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
10
1 track jump waveform
Center of the waveform
B
Adjustment Location :
[ MAIN BOARD ] – Component Side –
0V
level : 1.3 Vp-p
+ 0.7
– 0.6
symmetry
A (DC voltage)
E-F Balance Check (With general remote commander)
oscilloscope
BD board
TP (TE)
TP (VC)
Procedure :
1. Connect the test point JW003 (ADJ) on MAIN board to the
ground with a lead wire on main board.
2. Connect oscilloscpe to test point TP (TE) on BD board.
3. Turn ON the power and to set the ADJ mode.
4. Put disc (YEDS-18) in to play the number five track.
5. Press the 4 button. (The tracking servo and the sledding 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
Center of the waveform
JW004
(AFADJ)
JW003
(ADJ)
CN302
[ BD BOARD ] – Side A –
TP
(R151)
B
0V
level : 1.3 ± 0.6 Vp-p
A (DC voltage)
7. Press the 9 button. (The tracking servo and sledding serv o are
turned ON.) Confirm the C (DC voltage) is almost equal to the
A (DC voltage) is step 6.
Traverse waveform
C (DC
0V
Tracking servo
Sledding servo
OFF
Tracking servo
Sledding servo
ON
voltage)
8. Disconnect the lead wire of JW003 (ADJ) connected in step 1.
TP(RF)
TP(IOP)
TP(TE)
TP(VC)
CN102
TP(FE)
TP(FEI)
IC101
11
6-1. CIRCUIT BOARDS LOCATION
d
SECTION 6
DIAGRAMS
POWER board
HP board
(AEP, AED)
SW board
DF board
LOADING board
PANEL board
BD board
MAIN boar
• Abbreviation
AED: North European
12
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