Sony CDX-V7800X Service Manual ▷ View online
13
Fig. 1
1
tension spring (RA)
2
arm (roller)
3
retaing ring (RA)
4
shaft retainer
5
shaft roller assy
retaing ring (RA)
arm
arm
washer
washer
shaft retainer
shaft retainer
6
Special screw
1
CN517
3
Removal the solders.
4
P 2x3
5
LO motor sub assy
(M903)
9
SERVO board
8
heat sink (CD)
2
CN518
7
Special screw
2-7. SERVO BOARD
2-8. SHAFT ROLLER ASSY
14
1
P 2x3
2
sled motor assy
(M902)
3
optical pick-up block
1
tension spring (KF1)
7
compression spring (FL)
6
floating block assy
8
compression spring (FL)
4
Fit lever (D) in the
direction of the arrow.
2
damper (T)
3
damper (T)
5
Turn loading ring in the
direction of the arrow.
2-9. FLOATING BLOCK ASSY
2-10. OPTICAL PICK-UP BLOCK
15
SECTION 3
DIAGRAMS
3-1. IC PIN DESCRIPTIONS
• IC513 CXP81960M-659R (CD SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
A MUTE
O
Audio mute control output
2
N.C
—
Not used. (Open)
3
CD ON
O
CD servo power supply control output
4
RW/R
O
RF amplifier gain control output (H: CD-RW, L: CD-R/CD-DA)
5
SLD MINUS
O
Sled motor control output
6
SELF SW
I
Disc self store switch input
7
E/(U)
I
Destination setting input (Fixed at H in this set)
8
PH1
I
Photo coupler input 1 (Not used in this set)
9
SDA
I/O
I2C interface data input/output for video encoder IC.
10
SCL
O
I2C interface clock output to video encoder IC.
11
H WAIT
I
Wait input from MPEG decoder (Host) IC.
12
H INT
I
Interruption input from MPEG decoder IC.
13 – 20
HDATA7 – 0
I/O
Host data 7 – 0 input for MPEG decoder IC.
21
EMPH O
O
D/A converter emphasis control output to DSP IC.
22
CD DATA
O
Data output to CD servo IC.
23
CD XTAL
O
System latch output to CD servo IC.
24
CD CKO
O
Clock output to CD servo IC.
25
D SW
I
Disc switch input
26
N.C
—
Not used. (Fixed at H in this set)
27
LIMIT SW
I
Sled limit switch input
28
SUBQ
I
CD sub-Q serial data input from DSP IC.
29
N.C
—
Not used. (Open)
30
SQCK
O
Sub-Q clock output to DSP IC.
31
N.C
—
Not used. (Open)
32
MSRQ
O
Serial request output of master microcomputer.
33
N.C
—
Not used. (Open)
34
CD RST
O
CD reset output
35, 36
N.C
—
Not used. (Open)
37
MP
I
Connect to VSS.
38
RESET
I
Slave microcomputer hard reset input
39
VSS
—
Ground
40
XTAL
O
Crystal oscillation output (12 MHz)
41
EXTAL
I
Crystal oscillation input (12 MHz)
42
N.C
—
Not used. (Fixed at H in this set)
43
TEXT IN
I
Not used. (Connect to SUBQ)
44
N.C
—
Not used. (Open)
45
TEXT CLK
O
Not used. (Connect to SQCK)
46
PH2
I
Photo coupler input 2 (Not used in this set)
47 – 49
N.C
—
Not used. (Open)
50
AVSS
—
Analog ground
51
AVREF
—
Analog power supply reference input
52
AVDD
—
Analog power supply pin
53
GFS/MNT2 SEL
I
GFS/MNT2 select input of DSP IC. (Fixed at H in this set)
54
N.C
—
Not used. (Fixed at H in this set)
55
FOK
I
Focus OK input from DSP IC.
56
GFS
I
Guard frame synchro input from DSP IC.
57, 58
N.C
—
Not used. (Fixed at L in this set)
59
TEMP H
I
Not used. (Open)
60
TEMP L
I
Not used. (Open)
61
LOCK
I
Lock input from DSP IC.
62
TEST MODE
I
Not used. (Fixed at H in this set)
16
Pin No.
Pin Name
I/O
Pin Description
63
SENS
I
Sensitivity input from DSP IC.
64
IN SW
I
Disc in switch input
65, 66
N.C
—
Not used. (Fixed at H in this set)
67
MP3
I
MP3 playback control input (H: not playback, L: playback)
68
PH3
I
Photo coupler input 3 (Not used in this set)
69
SCLK
O
Serial clock output to DSP IC.
70
LM LOADING
O
Loading motor loading (CD tray close) output
71
TV RST
O
TV encoder IC reset output
72
N.C
—
Not used. (Open)
73
TE CANCEL
O
Tracking error offset cancel output of RF amplifier. (Not used in this set)
74
FE CANCEL
O
Focus error offset cancel output of RF amplifier. (Not used in this set)
75
BU IN
I
Back-up power supply input
76
SCOR
I
SCOR input from DSP IC.
77
MSO
I
Serial input from master microcomputer IC.
78
MSI
O
Serial output to master microcomputer IC.
79
MSC
I
Serial clock input from master microcomputer IC.
80
MCS
I
Chip select input from master microcomputer IC.
81
LM EJECT
O
Loading motor eject (CD tray open) output
82
DRV OE
O
Mute control output for driver IC.
83
MD2
O
Check output for operation mode. (Not used in this set)
84
TEX
I
Not used. (Connect to VSS)
85
TX
O
not used. (Open)
86
VSS
—
Digital ground
87
VDD
—
Digital power supply pin
88
N.C
—
Not used. (Fixed at H in this set)
89
H R/W
O
Read/Write select output for MPEG decoder IC. (H: Read, L: Write)
90
H RD
O
Mode select output for MPEG decoder IC at read. (H: Multiflux, L: Individual)
91 – 93
HADDR2 – 0
O
Host address 2 – 0 output for MPEG decoder IC.
94
H CS
O
Host chip select output for MPEG decoder IC.
95
N.C
—
Not used. (Open)
96
H RST
O
Host reset output
97 – 99
N.C
—
Not used. (Open)
100
CDM ON
O
CD mechanism deck loading motor power supply control output (8 V).
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