Sony CDPCX-55 Service manual
CDP-CX55
SERVICE MANUAL
Model Name Using Similar Mechanism CDP-CX50/CX571
CD Mechanism Type CDM-46TE
Base Unit Type KSM-213BFN/M-NP
Optical Pick-up Type KSS-213B/S-N
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
PX Model
MICROFILM
COMPACT DISC PLAYER
— 1 —
TABLE OF CONTENTS
1. SERVICING NOTE
.......................................................... 3
2. GENERAL .......................................................................... 6
3. DISASSEMBLY
3-1. Front Panel ......................................................................... 16
3-2. Illumination ASSY..............................................................16
3-3. CD Mechanism Deck .......................................................... 17
3-4. Base Unit and Magnet Holder............................................. 17
3-5. CD Mechanism Section ...................................................... 18
4. TEST MODE .....................................................................19
5. MECHANICAL ADJUSTMENTS ..............................22
6. ELECTRICAL ADJUSTMENTS ............................... 25
7. DIAGRAMS
7-1. Circuit Boards Location ......................................................28
7-2. IC Block Diagrams ............................................................. 30
7-3. Block Diagrams
• BD Section........................................................................ 33
• Main Section..................................................................... 35
7-4. Printed Wiring Board — BD Section —............................. 37
7-5. Schematic Diagram — BD Section — ............................... 39
7-6. Printed Wiring Board — Audio Section — ........................41
7-7. Schematic Diagram — Audio Section — ........................... 43
7-8. Printed Wiring Board — Main Section —.......................... 45
7-9. Schematic Diagram — Main Section — ............................ 47
7-10. Printed Wiring Board — Display Section — .................... 49
7-11. Schematic Diagram — Display Section —....................... 51
7-12. Printed Wiring Board — Sensor, Motor Section —.......... 53
7-13. Schematic Diagram — Sensor, Motor Section — ............ 54
7-14. IC Pin Functions................................................................ 55
8. EXPLODED VIEWS
8-1. Case Section........................................................................ 59
8-2. Front Panel Section ............................................................. 60
8-3. Chassis Section ................................................................... 61
8-4. Mechanism Deck Section 1 (CDM-46TE) ......................... 62
8-5. Mechanism Deck Section 2 (CDM-46TE) ......................... 63
8-6. Optical Pick-up Section (KSM-213 BFN/M-NP)............... 64
9. ELECTRICAL PARTS LIST ........................................ 65
MODEL IDENTIFICATION
— BACK PANEL —
PARTS No.
4-991-160-0π
4-991-160-1π
4-991-160-2π
4-991-160-3π
4-991-160-4π
4-991-160-5π
4-991-160-6π
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
The laser component in this product
is capable of emitting radiation
exceeding the limit for Class 1.
US model
Canadian model
AEP model
Australian model
E, PX model
Singapore model
UK model
MODEL
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
— 2 —
This caution label
is located inside
the unit.
SECTION 1
SERVICING NOTE
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for A C leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated A C v oltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
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 pickup 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 repeatedly.
0.15
Ω
µ
F
1.5k
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT . NE REMPLA CER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
— 3 —
CD-TEXT TEST DISC
This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display.
To check, perform the following procedure.
Checking Method:
1. Turn ON the power, set the disc on the disc table with the side labeled as “test disc” as the right side , close the front co v er, and chuck the
disc.
2. Press the ” button and play back the disc.
3. The following will be displayed on the fluorescent indicator tube.
Display : 1kHz/0 dB/ L&R
4. Press the = and + buttons to switch the track. The text data of each track will be displayed.
For details of the displayed contents for each track, refer to “Table 1 : CD-TEXT TEST DISC TEXT Data Contents” and “Table 2 : CDTEXT TEST DISC Recorded Contents and Display”.
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.
— 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
! ” # $ % & ´ (21h to 27h)1kHz 0dB L&R
( ) + , – . / (28h to 2Fh)
*
01234567 (30h to 37Fh)
8 9 : ; < = > ? (38h to 3Fh)
@A B CD E F G (40h to 47Fh)
H I J K L MN O (48h to 4Fh)
P Q R S T U VW (50h to 57Fh)
X Y Z [ ¥ ] ^ _ (58h to 5Fh)
a b c d e f g (60h to 57Fh)
′
h i j k l m n o (68h to 6Fh)
p q r s t u v w (70h to 77Fh)
xyz{I}
~
(78h to 7Fh)
i ¢ £ ¤ ¥ § (A0h to A7h) 8859-1
¬
–
≥ C ª
•±23
1
†
PR
µ¶ • (B0h to B7h)
′
1
1
º ¿ (B8h to BFh)
4
2
3
4
(A8h to AFh)
АБВГДЕЖЗ (C0h to C7Fh)
ИЙКЛМНОП (C8h to CFh)
D СТУФХЦ
ШЩЪЫЬY
˙
(C0h to C7Fh)
ß (D8h to DFh)
абвгдежз (E0h to E7Fh)
ийклмноп (E8h to FFh)
∂ стуфхц÷ (F0h to F7Fh)
шщъыьy
ÿ (F8h to FFFh)
´
No.66
No.67
to
No.99
N All the same
N All the same
N All the same
N All the same
N All the same
N All the same
N All the same
X Y Z [ / ] ^ _ (58····
N All the same
N All the same
N All the same
xyz{I}
~ (78····
i ¢ £ ¤ ¥ § (A0····
≥ (A8···· C ª
′
µ • (B0····
† ¿ (B8····
•±23
1
N All the same
N All the same
N All the same
´
ÙÚÛÜY
ß (D8····
N All the same
N All the same
стуфхц÷(F0····
N All the same
N All the same
N All the same
to
N All the same
Display
is not displayed
¬
PR–are not displayed
¶ are not displayed
1
3
1
º are not displayed
4
4
2
— 5 —
LOCATION OF PARTS AND CONTROLS
Front Panel
1
23
20
21
22
SECTION 2
GENERAL
4
6
5
8
7
9
10
11
12
13
1 POWER switch
2 Front cover
3 CONTINUE button
4 Display window
5 SHUFFLE button
6 PROGRAM button
7 REPEAT button
8 TIME/TEXT button
9 INPUT button
10 DISC/CHARACTER/PUSH ENTER knob
11 SEARCH button
19 18
12 CHECK button
13 CLEAR button
14 ± button
15 ≠ button
16 p button
17 P button
18 · button
19 PLUS ONE button
20 X-FADE button
21 NO DELAY button
22 MEGA CONTROL button
17 16
15 14
This section is extracted from
instruction manual.
— 6 —
— 7 —
— 8 —
— 9 —
— 10 —
— 11 —
— 12 —
— 13 —
— 14 —
— 15 —
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. FRONT PANEL
3
Connector
LED board: CNP841
4
Two screws (BVTT3x6)
To AUDIO board
!º
Claw
Expand the front panel
in the direction of arrow
to release catching claws.
A
5
Bracket (illumination)
(with illumination assy)
1
Screw (BVTT3x6)
2
Screw (BVTT3x6)
6
A
!™
Front panel
3-2. ILLUMINATION ASSY
While pressing arrows A, B, and
C
, rotate the illumination assembly
in arrow direction
D
and remove it.
Screw
(BVTT3x6)
9
Three screws
(BVTT3x6)
B
7
Beam
8
Flat type wire
(21 core)
!¡
Claw
Expand the front panel
in the direction of arrow
to release catching claws.
MAIN board: CN503
B
ILLUMINATION ASSY
D
— 16 —
A
B
C
3-3. CD MECHANISM DECK
1
Screw
(PTPWH2.6x8)
2
Table (50)
3
Two screws
(BVTP3x8)
4
Ring (B)
!¡
5
Two screws
(BVTT3x10)
!∞
Connector
TABLE SENSOR
board: CN52
!™
CD mechanism deck
Screw
(BVTT3x10)
7
Connector
DISC SENSOR (S) board: CN53
6
Screw (BVTT3x10)
8
Flat type wire (16 core)
BD board: CN102
9
Flat type wire (9 core)
BD board: CN103
!º
Connector
SW board: CN54
!¢
Connector
TABLE SENSOR board: CN51
!£
Connector
MOTOR board: CN61
!§
CD mechanism base unit
3-4. BASE UNIT AND MAGNET HOLDER
2
Remove in the arrow direction while pressing the claw
with a screwdriver, etc.
7
Tension coil
spring (F-1)
Reinforcement assy
Remove in the arrow direction while pressing the claw
with a screwdriver, etc.
1
Two screws
(BTP2.6x8)
4
Magnet holder
3
Screw
(BTP2.6x10)
0
Torsion spring (Holder)
5
Two screws
(PTPWH2.6x8)
6
Two screws
(PTPWH2.6x8)
!¡
Base unit
9
— 17 —
BU holder assy
8
Tension coil spring (F-2)
3-5. CD MECHANISM SECTION
9
Slider (Lock)
NOTE:
Adjust the position of the gear
as shown in the figure when
attaching.
7
Cover
(Lever)
6
Screw
(BTP2.6x8)
3
Screw
(BTP2.6x8)
!º
Slider (Cam)
4
Cam cover
1
Screw
(BTP2.6x8)
!£
Slider
(Loading)
2
SW board
!¡
Disc holder
(A)
!™
Torsion spring
(Loading)
!¢
!∞
Loading lever ASSY
5
Screw
(BTP2.6x8)
Tension coil spring (Lever)
8
Disc holder
(B)
— 18 —
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