Sony SCD-XB940 Bedienungsanleitung
SERVICE MANUAL
SUPER AUDIO CD PLAYER
AEP Model
UK Model
SPECIFICATIONS
SCD-XB940
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM55B-DVBU3
Base Unit Name DVBU3
Optical Pick-up Name KHM-220AAA/J1N
– Continued on next page –
Photo: Black type
Ver 1.1 2002.05
9-929-212-12 Sony Corporation
2002E0500-1 Home Audio Company
C2002.05 Published by Sony Engineering Corporation
2
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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 PUB-
LISHED BY SONY.
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.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
3
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY ......................................................... 8
4. DIAGRAMS
4-1. Notes for Printed Wiring Board and
Schematic Diagram ......................................................... 11
4-2. Printed Wiring Board – TK Board –.............................. 12
4-3. Schematic Diagram – TK Board – ................................ 13
4-4. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 14
4-5. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 15
4-6. Schematic Diagram – MAIN Board (1/6) – .................. 16
4-7. Schematic Diagram – MAIN Board (2/6) – .................. 17
4-8. Schematic Diagram – MAIN Board (3/6) – .................. 18
4-9. Schematic Diagram – MAIN Board (4/6) – .................. 19
4-10. Schematic Diagram – MAIN Board (5/6) – .................. 20
4-11. Schematic Diagram – MAIN Board (6/6) – .................. 21
4-12. Printed Wiring Board – AUDIO Board – ...................... 22
4-13. Schematic Diagram – AUDIO Board – ......................... 23
4-14. Printed Wiring Board – HP Board – .............................. 24
4-15. Schematic Diagram – HP Board –................................. 24
4-16. Printed Wiring Board – LOADING Board –................. 25
4-17. Schematic Diagram – LOADING Board – ................... 25
4-18. Printed Wiring Board – DISPLAY Board – .................. 26
4-19. Schematic Diagram – DISPLAY Board – ..................... 27
4-20. Printed Wiring Board – POWER Board – ..................... 28
4-21. Schematic Diagram – POWER Board –........................ 29
4-22. Printed Wiring Boards
– AC SW/TRANSFORMER Boards – ........................... 30
4-23. Schematic Diagram
– AC SW/TRANSFORMER Boards – ........................... 31
5. EXPLODED VIEWS................................................ 36
6. ELECTRICAL PARTS LIST ............................... 40
4
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down 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 emis-
sion, observe from more than 30 cm away from the objective lens.
MODEL IDENTIFICATION
– Back Panel –
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Part No.
HOW TO OPEN THE TRAY WHEN POWER SWITCH
TURNS OFF
There are two different methods to open the tray.
• Method-1
Insert a screw driver (3) into the aperture of the unit bottom, and
turn it in the direction of the arrow (to OUT direction).
tray
screw driver (3)
*To close the disc table, turn the screw driver (3)
in the reverse direction
(
to IN direction
)
.
Model Part No.
AEP 4-227-711-0
s
UK 4-227-711-1
s
tray
A
B
cam (CDM55)
screw driver (3)
• Method-2
1Insert a screw driver (3) into the aperture of the unit bottom,
and move the cam (CDM55) in the direction of arrow A.
2Pull the tray in the direction of arrow B.
ABOUT THE “E01” DISPLAY
“E01” is displayed when the above occurs in communication with
a system controller (IC605) and a display controller (IC203) at the
time of starting.
In this case, please check soldering, disconnection, etc. of each
IC.
Ver 1.1
5
SECTION 2
GENERAL This section is extracted from
instruction manual.
6
7
8
4connector
(CN992)
4connector
(CN351)
7two claws
2loading panel ass’y
qd front panel section
9knob (AMS)
6seven screws
(BV/RING)
qa connector
(CN201)
qs DISPLAY board
q; eight screws
(BVTP2.6 ×8)
7two claws
3wire (flat type) (10 core
)
(CN601)
5holder
1Pull out the tray.
(Refer to page 4, “HOWTO OPEN THE
TRAY WHEN POWER SWITCH TRANS OFF”.)
q; five screws
(BVTP2.6 ×8)
8
COVER (4095269)
FRONT PANEL SECTION
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
1two screws
1two screws
1two screws
1two screws
3cover (4095269
)
2
2
9
AUDIO/MAIN BOARD
MECHANISM DECK (CDM55B-DVBU3)
6three connectors
(CN301, 304, 351)
2two wires (flat type) (18 core)
(CN602, 603)
3two connectors
(CN605, 610)
4five screws
(BVTT3 ×8)
5MAIN board
9two PC board holders
7three screws
(BV/RING)
2wire (flat type) (10 core)
(CN601)
2two wires (flat type) (16 core)
(CN608, 611)
q; AUDIO board
8screw
(BVTT3 ×8)
1Pull out the tray.
(Refer to page 4, “HOW TO OPEN THE
TRAY WHEN POWER SWITCH TRANS OFF”.)
5screw
(BVTT3 ×8)
6mechanism deck
(CDM55B-DVBU3)
4connector
(CN605)
3two wires (flat type) (18 core)
(CN602, 603)
2loading panel ass’y
1Pull out the tray.
(Refer to page 4, “HOW TO OPEN THE
TRAY WHEN POWER SWITCH TRANS OFF”.)
10
TRAY
1Remove the tray. (Careful of the claw.)
claw
claw
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