Sony SCD-XA777ES Service Manual ▷ View online
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
6
SCD-XA777ES
Note:
Follow the disassembly procedure in the numerical order given.
D-POWER/POWER BOARDS AND RF BOARD SERVICE POSITION
1
Remove the case.
2
Turn over the set.
4
two bottom plates
3
four screws (3
×
8)
3
eight screws (3
×
8)
D-POWER board
POWER board
INSTALLATION TWO WIRES (FLAT TYPE) (25/35 CORE)
Note: When the wire (flat type) (35 core) is disconnected
from the RF board, then it is again connected,
disconnect the wire (flat type) (25 core) once,
and reconnect the wire (flat type) (35 core) first.
disconnect the wire (flat type) (25 core) once,
and reconnect the wire (flat type) (35 core) first.
wire (flat type) (35 core)
wire (flat type) (25 core)
RF board
– BOTTOM VIEW –
7
SCD-XA777ES
MAIN BOARD SERVICE POSITION
In checking the MAIN board, prepare jig (extension cable J-2501-205-A: 1.50 mm Pitch, 7 cores, Length 300 mm/
J-2501-086-A: 1.00 mm Pitch, 19 cores, Length 300 mm).
J-2501-086-A: 1.00 mm Pitch, 19 cores, Length 300 mm).
Note:
Be sure to ground the MAIN board with a lead wire when checking it.
lead wire
MAIN board
MOTHER board
connect jig (extension cable
J-2501-086-A) to the MAIN
board (CN901/902) and MOTHER
board (CN301/302).
J-2501-086-A) to the MAIN
board (CN901/902) and MOTHER
board (CN301/302).
connect jig (extension cable
J-2501-205-A) to the MAIN
board (CN903) and PANEL
board (CN1002).
J-2501-205-A) to the MAIN
board (CN903) and PANEL
board (CN1002).
AUDIO MODULE BLOCK SERVICE POSITION
audio module block