Sony WX-7700MDX Service Manual ▷ View online
WX-7700MDX
21
5
sensor (CD) board
4
special screw
3
guide (disc M)
2
1
two claws
1
motor frexible board (CN3)
6
LO motor sub assy
(loading) (M103)
(loading) (M103)
5
screw
(P2
(P2
×
3)
3
three screws
(PS2
(PS2
×
4)
1
pick-up flexible board
(CN2)
(CN2)
2
Remove two solders of lead wire
of loading motor.
of loading motor.
2
Remove five solders of lead wire
of sensor board and load board.
of sensor board and load board.
4
servo board
3-22. SENSOR (CD) BOARD
3-23. SERVO BOARD, LO MOTOR SUB ASSY (LOADING) (M103)
WX-7700MDX
22
5
arm roller assy
2
arm (roller)
1
tension spring (RA)
yellow
black
black
shaft retainer (roller)
4
shaft retainer
(roller)
(roller)
shaft retainer
(roller)
(roller)
retaining ring
(RA)
(RA)
3
retaining ring
(RA)
(RA)
7
special screw
8
load board
6
Remove two solders of lead wire
from load board.
from load board.
arm (roller)
arm (roller)
washer
washer
4
Slide the lever (D) in the direction of arrow.
5
Turn loading ring in the direction of arrow.
1
tension spring (KF1)
8
compression spring
(FL)
(FL)
7
compression spring
(FL)
(FL)
6
floating block assy
3
damper (T)
2
damper (T)
3-24. ARM ROLLER ASSY, LOAD BOARD
3-25. FLOATING BLOCK ASSY
WX-7700MDX
23
23
7
shaft (feed) assy
2
sled motor assy
(M101)
(M101)
1
two screws
(PS2
(PS2
×
3)
5
two screws (PS2
×
3)
6
plate spring (feed)
4
pick up flexible board
3
optical pick-up (KSS-720A)
3-26. OPTICAL PICK-UP (KSS-720A), SLED MOTOR ASSY (M101)
SECTION 4
PHASE ALIGNMENT
Note:
Follow the assembly procedure in the numerical order given.
4-1.
ASSEMBLY OF ARM (L/R) ASSY
3
three screws
(PS2.6
(PS2.6
×
4)
1
Pull the arm (R) assy in the direction of arrow
at the full.
at the full.
1
Pull the arm (L) assy
in the direction of arrow
at the full.
in the direction of arrow
at the full.
2
drive shaft assy
OK
NG
WX-7700MDX
24
24
SECTION 5
DIAGRAMS
5-1.
BLOCK DIAGRAM – CD SERVO Section –
75
AGCO
RF AMP,
FOCUS/TRACKING ERROR AMP,
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR,
DIGITAL FILTER, D/A CONVERTER.
CD-TEXT
IC1
77
RFO
91
FEO
93
TEO
76 AGCI
90 FE–
92 TE–
94
TE2
95 TEC
62 FD
63 TD
64 SD
65 MD
A
B
C
D
E
F
I-V AMP
PD
LD
DETECTOR
74 RFI
71
EFM
72 ASY
84
82
85
83
87
86
E
C
D
A
B
F
98 LD
97
PD
(FOCUS)
(TRACKING)
2-AXIS DEVICE
OPTICAL
PICK-UP BLOCK
(KSS-720A)
• SIGNAL PATH
: CD PLAY
LASER DIODE
M
M
M
17
18
VO3+
VO3–
14
13
VO1+
VO1–
11
12 VO2+
VO2–
10
9
VOL+
VOL–
FWD
REV
1
2
IN2 6
IN1 5
OPIN3– 23
OPIN4– 26
16
15
VO4–
VO4+
M103
(LOADING)
M102
(SPINDLE)
M101
(SLED)
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE/LOADING
MOTOR DRIVE
IC2
24
CD CLOCK
SWITCH
IC503
XTAL
27
EMPH
7
SO
8
SI
6
SCK
54
TSI
53
TSO
39
TSOI
55
TSCK
2
RFOK
52
PACK
5
STB
56
TSTB
4
A0
3
RST
IC3
CD-DATA,
CD-BCK,
CD-LRCK
BFOT
A
B
C
D
30
34
32
DOUT
LRCK
SCKO
CD-DATA
CD-BCK
CD-LRCK
27 CD CKO/TCKO
59 CD RFOK
64 CD PACK
37 CD STB
60 CD PH1
66 CD PH2
61 CD PH3
62 CD DSW
67 CD SELFSW
68 CD LIMIT
41 CD TSTB
36 CD A0
35 CD XRST
CD LM LO
57
CD LM EJ
58
MASTER CONTROLLER
(CD MECHANISM CONTROLLER)
IC550 (1/4)
25 CD SI/TSI
26 CD SO/TSO
SW3
(DISC SET)
SW1
(SELF)
SW4
(LIMIT)
CDM ON
CD EMPH
B
C
D
E
F
LD
PD
FCS+
FCS–
TRK+
TRK–
A
AUTOMATIC
POWER
CONTROL
Q1
DISC IN DETECT
D12, Q6
DISC SIZE
(8cm/12cm) DETECT
D11, Q7
LOADING
COMPLETION DETECT
D10, Q8
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