Sony SCD-XA777ES Service Manual ▷ View online
2
SCD-XA777ES
TABLE OF CONTENTS
1.
SERVICING NOTES
...............................................
4
2.
GENERAL
...................................................................
9
3.
DISASSEMBLY
3-1. Disassembly flow ............................................................ 10
3-2. Case (Top) ....................................................................... 11
3-3. Loading Panel Assy ......................................................... 11
3-4. Front Panel Section ......................................................... 12
3-5. MAIN Board, Bracket (MAIN) ...................................... 12
3-6. Mechanism Deck (CDM19JB-DVBU4B/
3-2. Case (Top) ....................................................................... 11
3-3. Loading Panel Assy ......................................................... 11
3-4. Front Panel Section ......................................................... 12
3-5. MAIN Board, Bracket (MAIN) ...................................... 12
3-6. Mechanism Deck (CDM19JB-DVBU4B/
CDM19JN-DVBU4B), RF Board ................................... 13
3-7. Disc Table, Belt, Loading Motor (M1) ........................... 13
3-8. Optical Pick-up (KHM-230AAA/J1NP) ........................ 14
3-9. Base Unit (DVBU4B) ..................................................... 15
3-8. Optical Pick-up (KHM-230AAA/J1NP) ........................ 14
3-9. Base Unit (DVBU4B) ..................................................... 15
4.
TEST MODE
.............................................................. 16
5.
DIAGRAMS
5-1. Block Diagram – RF/SERVO Section – ........................ 31
5-2. Block Diagram – MAIN Section (1/2) – ....................... 32
5-3. Block Diagram – MAIN Section (2/2) – ....................... 33
5-4. Block Diagram – AUDIO Section (1/2) – ..................... 34
5-5. Block Diagram – AUDIO Section (2/2) – ..................... 35
5-6. Block Diagram
5-2. Block Diagram – MAIN Section (1/2) – ....................... 32
5-3. Block Diagram – MAIN Section (2/2) – ....................... 33
5-4. Block Diagram – AUDIO Section (1/2) – ..................... 34
5-5. Block Diagram – AUDIO Section (2/2) – ..................... 35
5-6. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 36
5-7. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 37
5-8. Printed Wiring Boards
– LOADING MOTOR/RF/SWITCH Boards – .............. 38
5-9. Schematic Diagram
– LOADING MOTOR/RF/SWITCH Boards – .............. 39
5-10. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 40
5-11. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 41
5-12. Schematic Diagram – MAIN Board (1/5) – .................. 42
5-13. Schematic Diagram – MAIN Board (2/5) – .................. 43
5-14. Schematic Diagram – MAIN Board (3/5) – .................. 44
5-15. Schematic Diagram – MAIN Board (4/5) – .................. 45
5-16. Schematic Diagram – MAIN Board (5/5) – .................. 46
5-13. Schematic Diagram – MAIN Board (2/5) – .................. 43
5-14. Schematic Diagram – MAIN Board (3/5) – .................. 44
5-15. Schematic Diagram – MAIN Board (4/5) – .................. 45
5-16. Schematic Diagram – MAIN Board (5/5) – .................. 46
5-17. Printed Wiring Board – D.OUT Board – ....................... 47
5-18. Schematic Diagram – D.OUT Board – .......................... 47
5-19. Printed Wiring Board
5-18. Schematic Diagram – D.OUT Board – .......................... 47
5-19. Printed Wiring Board
– MOTHER Board (Component Side) – ........................ 48
5-20. Printed Wiring Board
– MOTHER Board (Conductor Side) – ......................... 49
5-21. Schematic Diagram – MOTHER Board (1/2) – ............ 50
5-22. Schematic Diagram – MOTHER Board (2/2) – ............ 51
5-23. Printed Wiring Board – AUDIO FRONT Board – ......... 52
5-24. Schematic Diagram – AUDIO FRONT Board – ........... 53
5-25. Printed Wiring Board – AUDIO SURR Board – ........... 54
5-26. Schematic Diagram – AUDIO SURR Board – .............. 55
5-27. Printed Wiring Board – AUDIO C/SW Board – ............ 56
5-28. Schematic Diagram – AUDIO C/SW Board – .............. 57
5-29. Printed Wiring Board – PANEL Board – ...................... 58
5-30. Schematic Diagram – PANEL Board – ......................... 59
5-31. Printed Wiring Boards
5-22. Schematic Diagram – MOTHER Board (2/2) – ............ 51
5-23. Printed Wiring Board – AUDIO FRONT Board – ......... 52
5-24. Schematic Diagram – AUDIO FRONT Board – ........... 53
5-25. Printed Wiring Board – AUDIO SURR Board – ........... 54
5-26. Schematic Diagram – AUDIO SURR Board – .............. 55
5-27. Printed Wiring Board – AUDIO C/SW Board – ............ 56
5-28. Schematic Diagram – AUDIO C/SW Board – .............. 57
5-29. Printed Wiring Board – PANEL Board – ...................... 58
5-30. Schematic Diagram – PANEL Board – ......................... 59
5-31. Printed Wiring Boards
– HP/JOG/KEY/R.CNTL Boards – ................................ 60
5-32. Schematic Diagram
– HP/JOG/KEY/R.CNTL Boards – ................................ 61
5-33. Printed Wiring Board – A-POWER Board – ................. 62
5-34. Schematic Diagram – A-POWER Board – .................... 63
5-35. Printed Wiring Board – D-POWER Board – ................. 64
5-36. Schematic Diagram – D-POWER Board – ................... 65
5-37. Printed Wiring Boards – AC/AC SW Boards – ............. 66
5-38. Schematic Diagram – AC/AC SW Boards – ................. 67
5-39. IC Pin Function Description ........................................... 76
5-34. Schematic Diagram – A-POWER Board – .................... 63
5-35. Printed Wiring Board – D-POWER Board – ................. 64
5-36. Schematic Diagram – D-POWER Board – ................... 65
5-37. Printed Wiring Boards – AC/AC SW Boards – ............. 66
5-38. Schematic Diagram – AC/AC SW Boards – ................. 67
5-39. IC Pin Function Description ........................................... 76
6.
EXPLODED VIEWS
6-1. Case Section .................................................................... 91
6-2. Front Panel Section ......................................................... 92
6-3. Bottom Section ................................................................ 93
6-4. Board Section-1 ............................................................... 94
6-5. Board Section-2 ............................................................... 95
6-6. Chassis Section ............................................................... 96
6-7. Mechanism Deck Section
6-2. Front Panel Section ......................................................... 92
6-3. Bottom Section ................................................................ 93
6-4. Board Section-1 ............................................................... 94
6-5. Board Section-2 ............................................................... 95
6-6. Chassis Section ............................................................... 96
6-7. Mechanism Deck Section
(CDM19JB-DVBU4B, CDM19JN-DVBU4B) .............. 97
6-8. Base Unit Section (DVBU4B) ........................................ 98
7.
ELECTRICAL PARTS LIST
............................... 99
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
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 PUB-
LISHED BY SONY.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
3
SCD-XA777ES
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• 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.
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1
LASER product.
The CLASS 1 LASER PRODUCT
MARKING is located on the rear exterior.
LASER product.
The CLASS 1 LASER PRODUCT
MARKING is located on the rear exterior.
The following caution label is located
inside the unit.
inside the unit.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
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 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
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.
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 AC voltmeter. 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are suitable. (See Fig. A)
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are suitable. (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
µ
F
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
This label is located on the left exterior.
US and Canadian models
AEP model
4
SCD-XA777ES
SECTION 1
SERVICING NOTES
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.
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.
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.
CLEANING OF OPTICAL PICK-UP LENS
In cleaning the lens of optical pick-up, use the air blower.
Never use a cotton swab for cleaning the lens of optical pick-up,
which otherwise causes a trouble.
Never use a cotton swab for cleaning the lens of optical pick-up,
which otherwise causes a trouble.
RESETTING OPERATION AT POWER ON
If the power is turned on with a disc loaded in the set, a sequence
of operation as shown below will be performed.
(The operation varies depending on the type of disc)
Condition: continue mode
of operation as shown below will be performed.
(The operation varies depending on the type of disc)
Condition: continue mode
(1) CD
1.
Sled reverse move (sled in)
2.
Disc detect
3.
IC setting for CD
4.
Servo error signal offset auto adjustment
5.
Spindle kick for LD on
6.
LD on
7.
Focus search
8.
Focus servo on
9.
Spindle kick
10. Spindle servo on
11. E-F balance auto adjustment
12. Tracking & sled servo on
13. Focus bias auto adjustment
14. Focus servo gain auto adjustment
15. Tracking servo gain auto adjustment
16. Jump to lead-in area
17. Read TOC
18. Stop
11. E-F balance auto adjustment
12. Tracking & sled servo on
13. Focus bias auto adjustment
14. Focus servo gain auto adjustment
15. Tracking servo gain auto adjustment
16. Jump to lead-in area
17. Read TOC
18. Stop
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
(2) SACD (single layer)
1.
Sled reverse move (sled in)
2.
Disc detect
3.
IC setting for SACD
4.
Servo error signal offset auto adjustment
5.
Spindle kick for LD on
6.
LD on
7.
Focus search
8.
Focus servo on
9.
Spindle kick
10. Spindle servo on
11. E-F balance auto adjustment
12. Tracking & sled servo on
13. Focus bias auto adjustment
14. Focus servo gain auto adjustment
15. Tracking servo gain auto adjustment
16. Jump to lead-in area
17. Read TOC
18. Stop
11. E-F balance auto adjustment
12. Tracking & sled servo on
13. Focus bias auto adjustment
14. Focus servo gain auto adjustment
15. Tracking servo gain auto adjustment
16. Jump to lead-in area
17. Read TOC
18. Stop
(3) SACD (dual layer)
1.
Sled reverse move (sled in)
2.
Disc detect
3.
IC setting for SACD
4.
Servo error signal offset auto adjustment
5.
Spindle kick for LD on
6.
LD on
7.
Focus search
8.
Focus servo on (layer 0)
9.
Spindle kick
10. Spindle servo on
11. E-F balance auto adjustment (layer 0)
12. Tracking & sled servo on (layer 0)
13. Focus bias auto adjustment (layer 0)
14. Focus servo gain auto adjustment (layer 0)
15. Tracking servo gain auto adjustment (layer 0)
16. Jump to lead-in area
17. Read TOC
18. Focus jump (layer 0tlayer 1)
19. E-F balance auto adjustment (layer 1)
20. Tracking & sled servo on (layer 1)
21. Focus bias auto adjustment (layer 1)
22. Focus servo gain auto adjustment (layer 1)
23. Tracking servo gain auto adjustment (layer 1)
24. Focus Jump (layer 1tlayer 0)
25. Stop
11. E-F balance auto adjustment (layer 0)
12. Tracking & sled servo on (layer 0)
13. Focus bias auto adjustment (layer 0)
14. Focus servo gain auto adjustment (layer 0)
15. Tracking servo gain auto adjustment (layer 0)
16. Jump to lead-in area
17. Read TOC
18. Focus jump (layer 0tlayer 1)
19. E-F balance auto adjustment (layer 1)
20. Tracking & sled servo on (layer 1)
21. Focus bias auto adjustment (layer 1)
22. Focus servo gain auto adjustment (layer 1)
23. Tracking servo gain auto adjustment (layer 1)
24. Focus Jump (layer 1tlayer 0)
25. Stop
Part No.
MODEL IDENTIFICATION
– Back Panel –
– Back Panel –
Model
Part No.
US and Canadian
4-235-601-1
[]
AEP
4-235-601-2
[]
5
SCD-XA777ES
HOW TO OPEN THE DISC TABLE WHEN POWER SWITCH TURNS OFF
OPTICAL PICK-UP SERVICE POSITION
Place the insulator on the MAIN board, then install the base unit (DVBU4B) on it as shown in the figure.
disc table
loading panel assy
tapering driver
cover (CAM)
2
Draw out the loading panel assy
in the direction of arrow
in the direction of arrow
B
.
1
Insert a tapering driver in the hole
at the bottom of the unit,
turn the cover (CAM) fully in the
direction of arrow
at the bottom of the unit,
turn the cover (CAM) fully in the
direction of arrow
A
.
B
A
base unit
(DVBU4B)
(DVBU4B)
MAIN board
insulator