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CDCX-937
Service manual
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Sony CDCX-937, CDCR-937, CDCX-937 Service manual

CDC-R937/X937
SERVICE MANUAL
Ver 1.1 2004. 04
Photo: CDC-R937
• The CD section have no adjustment.
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
CDC-R937
Model Name Using Similar Mechanism NEW CD Drive Mechanism Type MG-930B-185 Optical Pick-up Name OPTIMA-752B
RADIO SECTION
(FM)
Frequency Range: 87.5 MHz – 108 MHz Intermediate frequency: 10.7 MHz (CDC-R937) Usable Sensitivity: 12.7 dBf 50 dB Quieting Sensitivity: 17.2 dBf IF Rejection: 100 dB Frequency Response: 30 Hz – 15,000 Hz S/N Ratio: 67 dB (CDC-R937)
70 dB (CDC-X937) Stereo Separation: 35 dB at 1 kHz Alternate Channel Selectivity: 98 dB Capture Ratio: 3 dB
(AM) (CDC-X937)
Frequency Range: 530 kHz – 1,710 kHz Usable Sensitivity: 30 µV (30 dB)
(MW) (CDC-R937)
Frequency Range: 531 kHz – 1,602 kHz Intermediate frequency: 10.71 MHz/450 kHz Usable Sensitivity: 30 µV (30 dB)
(LW) (CDC-R937)
Frequency Range: 144 kHz – 288 kHz (1 kHz/9 kHz step) Intermediate frequency: 10.71 MHz/450 kHz Usable Sensitivity: 30 µV (30 dB)
CD SECTION
Frequency Response: 17 Hz – 20 kHz +0/–3 dB Dynamic Range: More than 92 dB Channel Separation: More than 60 dB S/N Ratio: More than 90 dB Wow/Flutter: Unmeasurable
AUDIO SECTION
Max. Power Output: 45 W × 4 channels
AUX IN Input
Input sensitivity (load impedance) AUX IN: 300 mV (10 kΩ)
– Continued on next page –
FM/AM COMPACT DISC PLAYER
CDC-X937
9-877-344-02
2004D04-1 © 2004. 04
FM/MW/LW COMPACT DISC PLAYER
CDC-R937
Sony Corporation
e Vehicle Company Published by Sony Engineering Corporation
1
CDC-R937/X937
GENERAL
Power-Supply Voltage: 14.4 V (11 to 16 V allowable),
Load Impedance: 4 Ω Tone Control: Bass ±10 dB at 100 Hz,
Preamp Output Voltage (load impedance): 2.2 V (10 kΩ) Installed size: 182 (W) × 53 (H) × 155 (D) mm
Supplied Accessory: Carrying case (1)
CARD REMOTE CONTROL
Dimensions: Approx. 33 (W) × 85 (H) × 7.5 (D) mm
Weight: Approx. 20 g (0.7 oz.) (including battery)
• Specifications and external appearance are subject to change without notice due to product improvement.
DC, negative ground
Treble ±10 dB at 10 kHz
(7 1/4 (W) × 2 1/8 (H) × 6 1/8 (D) inches)
(1 5/16 (W) × 3 3/8 (H) × 5/16 (D) inches)
SERVICE NOTES
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.
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
CDC-X937:
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
CDC-R937:
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
This compact disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the exterior.
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 P ARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
2
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

TABLE OF CONTENTS

1. GENERAL
Connections (CDC-X937) ....................................................... 4
Connections (CDC-R937) ....................................................... 5
2. DISASSEMBLY
2-1. Base (Around) ..................................................................... 8
2-2. CD Mechanism Block ......................................................... 8
2-3. Main Board Section ............................................................ 9
2-4. Main Board ......................................................................... 9
2-5. Heat Sink (CT) .................................................................. 10
2-6. Motor (SVX) Assy ............................................................ 10
2-7. Sub Board.......................................................................... 11
2-8. Servo Board....................................................................... 11
2-9. Floating Block Assy .......................................................... 12
2-10. Lever Assy (CD Up Holder CNF).....................................12
2-11. Lever (CD Roller) Sub Assy ............................................. 13
2-12. Lever Assy (CD Holder) ................................................... 13
2-13. Motor (Sled) Sub Assy...................................................... 14
2-14. Pick-up Sub Assy .............................................................. 14
CDC-R937/X937
3. ELECTRICAL ADJUSTMENT.................................... 15
4. DIAGRAMS
4-1. IC Pin Descriptions ........................................................... 16
4-2. Circuit Boards Location .................................................... 19
4-3. Block Diagram –CD Section–........................................... 20
4-4. Block Diagram –Main Section–........................................ 21
4-5. Block Diagram –Front Section–........................................ 22
4-6. Schematic Diagram –CD Mechanism Section– ................ 23
4-7. Printed Wiring Boards –CD Mechanism Section–............ 24
4-8. Printed Wiring Board –Main Section– .............................. 26
4-9. Schematic Diagram –Main Section (1/2)– ........................ 28
4-10. Schematic Diagram –Main Section (2/2)– ........................ 29
4-11. Printed Wiring Boards –Key Section– .............................. 30
4-12. Schematic Diagram –Key Section–................................... 31
4-13. Printed Wiring Boards –Front Section– ............................ 32
4-14. Schematic Diagrams –Front Section– ............................... 33
4-15. IC Block Diagrams............................................................ 34
5. EXPLODED VIEWS
5-1. Chassis Section ................................................................. 36
5-2. Panel Section .....................................................................37
5-3. Front Section ..................................................................... 38
5-4. CD Mechanism Section (1) ............................................... 39
5-5. CD Mechanism Section (2) ............................................... 40
6. ELECTRICAL PARTS LIST ........................................ 41
3
CDC-R937/X937
CONNECTIONS (CDC-X937)
SECTION 1

GENERAL

This section is extracted from instruction manual.
4
CONNECTIONS (CDC-R937)
CDC-R937/X937
5
CDC-R937/X937
6
SECTION 2

DISASSEMBLY

Note : This set can be disassemble according to the following sequence.
SET
2-1. BASE (AROUND)
(Page 8)
2-2. CD MECHANISM BLOCK
(Page 8)
CDC-R937/X937
2-3. MAIN BOARD SECTION
(Page 9)
2-4. MAIN BOARD
(Page 9)
2-5. HEAT SINK (CT)
(Page 10)
2-6. MOTOR (SVX) ASSY
2-14. PICK-UP SUB ASSY
2-12. LEVER ASSY (CD HOLDER)
2-13. MOTOR (SLED) SUB ASSY
(Page 10)
(Page 14)
(Page 13)
(Page 14)
2-7. SUB BOARD
(Page 11)
2-8. SERVO BOARD
(Page 11)
2-9. FLOATING BLOCK ASSY
(Page 12)
2-10. LEVER ASSY (CD UP HOLDER CNF)
(Page 12)
2-11. LEVER (CD ROLLER) SUB SSY
(Page 13)
7
CDC-R937/X937
)
Note : Follow the disassembly procedure in the numerical order given.
2-1. BASE (AROUND)
2
screw (TH 2.6x4)
3
2-2. CD MECHANISM BLOCK
qa

CD mechanism block

3
screw
(
0
bracket (CD)
TH 2.6x4
)

base (around)

2
screw
(+
PTP 2.6x4
1
screw (TH 2.6x4)
)
7
(+
two
screws
PTP 2.6x4
)
1
screw
(+
PTP 2.6x4
8
holder (CD mecha
)
4
screw
(
two screws (TH 2.6x4)
9
6
CON771
TH 2.6x4
5
)
8
2-3. MAIN BOARD SECTION
8
two
screws
(M
2.6x3
)
7
CON721
4
Removal the solder.
brown
black
6
CON702
5
CON701
CDC-R937/X937
qs

MAIN board section

1
(+
screw
PTP 2.6x4
)
2-4. MAIN BOARD
6
screw
(+
PTT 2.6x5
qa
front section
)
3
sheet (PWB)
7
L chassis
5
(+
9
two
(M
2
cover
0
two ground point screws (+PTT 2.6x6)
screw
PTT 2.6x6
)
4
screw
(+
PTT 2.6x6
screws
2.6x3
)
)
3
Removal the solder.
9

MAIN board

8
R chassis
2
Removal the solder.
1
Removal
the solder.
9
CDC-R937/X937
y
2-5. HEAT SINK (CT)
1
(+
screw
BTT 2.6x8
)
2
two
(+
4

heat sink (CT)

screws
P 3x12
3
(+
) screw
PTT 2.6x8
)
2-6. MOTOR (SVX) ASSY
1
screw
PTT 2x3
(+
)
5
(+
4
Removal the solders.
black
brown
screw
PTT 2x3
)
6
SENSOR board
2
screw
(+
PTT 2x3
3
motor (SVX) ass
)
10
2-7. SUB BOARD
1
Removal the solders.
2
(+
screw
P 1.4x2
CDC-R937/X937
)
3

SUB board

2-8. SERVO BOARD
blue brown black
5
PIC2 FLEXIBLE board
1
Removal the solders.
gray
white
red
black
2
(+
screw
PTT 2x3
black
yellow
4

SERVO board

)
3
two
(M
screws
1.7x5
)
green
red
11
CDC-R937/X937
w
2-9. FLOATING BLOCK ASSY
1
8
claw
qs
oil damper
tension spring
0
2
tension spring
qd
floating block aasy
3
tension spring
9
7
claw
qa
oil damper
4
tension spring
5
tension spring
2-10. LEVER ASSY (CD UP HOLDER CNF)
1
screw
P 1.4x2
(+
2
leaf spring (roller)
)
6
claw
5

lever assy (CD up holder CNF)

4
tension spring
12
3
special scre
2-11. LEVER (CD ROLLER) SUB ASSY
1
2
3

lever (CD roller) sub assy

CDC-R937/X937
2-12. LEVER ASSY (CD HOLDER)
3
4

lever assy (CD holder)

2
special screw
1
torsion spring
13
CDC-R937/X937
y
y
2-13. MOTOR (SLED) SUB ASSY
1
screw
P 1.7x2
(+
2
)
motor (sled) sub ass
2-14. PICK-UP SUB ASSY
1
two
screws
B 1.4x5
(+
2
leaf spring
)
3
pick-up sub ass
14
SECTION 3

ELECTRICAL ADJUSTMENT

RDS Adjustment (CDC-R937 only)
Setting:98 MHz
31 dBµV (EMF) 1 kHz (Modulation Frequency) 45 kHz DEV
Check point: S.METER test point
Adjustment location: SFR101
Specification: 2.0±0.1 V
Procedure: Set to FM98.0 MHz and adjust SFR101 so that the test
point is 2.0±0.2 V.
Adjustment Location:
MAIN BOARD (CONDUCTOR SIDE)
IC501
CDC-R937/X937
TU101
TP1 S.METER
SFR101 RDS Adjustment
IC151
IC901
15
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