Sony CDX-M770 Service Manual ▷ View online
25
CDX-M770
4-1. IC PIN DESCRIPTIONS
• IC501 CXD2598Q (DIGITAL SERVO, DIGITAL SIGNAL PROCESSOR) (SERVO BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
DVDD
—
Digital power supply pin
2
DVSS
—
Digital ground
3
SOUT
O
Servo brock serial data output (Not used.)
4
SOCK
O
Servo brock serial data read clock output (Not used.)
5
XOLT
O
Servo brock serial data latch output (Not used.)
6
SQSO
O
Sub Q 80 bit, PCM peak and level data output. CD TEXT data output
7
SQCK
I
Clock input from SQSO read out.
8
SCSY
I
Fixed at “L”.
9
SBSO
O
Serial output of sub-P to W. (Not used.)
10
EXCK
I
Clock input from SBSO read out. (Fixed at “L”)
11
XRST
I
System reset (“L”: Reset)
12
STSM
I
System mute input (Fixed at “L”)
13
DATA
I
Serial data input from CPU.
14
XLAT
I
Latch input from CPU. Latch serial data at the falling edge.
15
CLOK
I
Serial data transfer clock input from CPU.
16
SENS
O
SENS output for CPU.
17
SCLK
I
Clock input from SENS serial data read.
18
ATSK
I/O
Input/output for anti-shock.
19
WFCK
O
WFCK (Write Flame Clock) output (Not used.)
20
XUGF
O
XUGF output (Not used.)
21
XPCK
O
XPCK output (Not used.)
22
GFS
O
GFS output
23
C2PO
O
C2PO output (Not used.)
24
SCOR
O
“H” output at either detection, sub code sync S0 or S1.
25
C4M
O
4.2336 MHz output (Not used.)
26
WDCK
O
Word clock output f=2Fs (Not used.)
27
COUT
I/O
Track number count signal input/output (Not used.)
28
MIRR
I/O
Mirror signal input/output (Not used.)
29
DVSS
—
Digital ground
30
DVDD
—
Digital power supply pin
31
DFCT
I/O
Diffect signal input/output (Not used.)
32
FOK
I/O
Focus OK signal input/output
33
PWM1
I
External control input of spindle motor.
34
LOCK
I/O
Lock signal input/output
35
MDP
O
Servo control output of spindle motor.
36
SSTP
I
Disc most inner track detection signal input
37
FSTIO
I/O
2/3 frequency division input/output of pins ih and ij. (Not used.)
38
SFDR
O
Sled drive output
39
SRDR
O
Sled drive output
40
TFDR
O
Tracking drive output
41
TRDR
O
Tracking drive output
42
FFDR
O
Focus drive output
43
FRDR
O
Focus drive output
44
DVDD
—
Digital power supply pin
45
DVSS
—
Digital ground
46
TEST
I
Test pin (Fixed at “L”.)
47
TES1
I
Test pin (Fixed at “L”.)
48
XTSL
I
X’tal select input (“L”: 16.9344 MHz, “H”: 33.8688 MHz)
49
VC
I
Center voltage input
50
FE
I
Focus error signal input
51
SE
I
Sled error signal input
SECTION 4
DIAGRAMS
26
CDX-M770
Pin No.
Pin Name
I/O
Pin Description
52
TE
I
Tracking error signal input
53
CE
I
Center servo analog input
54
RFDC
I
RF signal input
55
ADIO
O
Test pin (Not used.)
56
AVSSO
—
Analog ground
57
IGEN
I
Constant current input from OP amplifier.
58
AVDDO
—
Analog ground
59
ASYO
O
EFM full-swing output (“L”: VSS, “H”: VDD)
60
ASYI
I
Asymmetry comparate voltage input
61
RFAC
I
EFM signal input
62
AVSS3
—
Analog ground
63
CLTV
I
VCO control voltage input from master.
64
FILO
O
Filter output for master PLL. (slave=digital PLL)
65
FILI
I
Filter input from master PLL.
66
PCO
O
Charge pump output for master PLL.
67
AVDD3
—
Analog power supply pin
68
BIAS
I
Asymmetry circuit constant current input
69
VCTL
I
VCO2 control input from wideband EFM PLL.
70
V16M
O
VCO2 oscillator output for wideband EFM PLL. (Not used.)
71
VPCO
O
Charge pump output for wideband EFM PLL. (Not used.)
72
DVSS
—
Digital ground
73
MD2
I
Digital out ON/OFF control input (“L”: OFF, “H”: ON)
74
DOUT
O
Digital out output
75
ASYE
I
Asymmetry circuit ON/OFF input (“L”: OFF, “H”: ON)
76
DVDD
—
Digital power supply pin
77
LRCK
O
D/A interface LR clock output (f=Fs)
78
LRCKI
I
D/A interface LR clock input
79
PCMD
O
D/A interface serial data output (2’s COMP, MSB fast)
80
PCMD
I
D/A interface serial data input (2’s COMP, MSB fast)
81
BCK
O
D/A interface bit clock output
82
BCKI
I
D/A interface bit clock input
83
EMPH
O
Emphasis ON/OFF signal output
84
EMPHI
I
Emphasis ON/OFF signal input (“H”: ON, “L”: OFF)
85
XVDD
—
Power supply for master clock.
86
XTAI
I
X’tal oscillator input from master clock (16.9344 MHz).
87
XTAO
O
X’tal oscillator output for master clock (16.9344 MHz). (Not used.)
88
XVSS
—
Ground pin for master clock.
89
AVDD1
—
Analog power supply pin
90
AOUT1
O
Lch analog output (Not used.)
91
AIN1
I
Lch OP amplifier input (Not used.)
92
LOUT1
O
Lch LINE output (Not used.)
93
AVSS1
—
Analog ground
94
AVSS2
—
Analog ground
95
LOUT2
O
Rch LINE output (Not used.)
96
AIN2
I
Rch OP amplifier input (Not used.)
97
AOUT2
O
Rch analog output (Not used.)
98
AVDD2
—
Analog power supply pin
99
RMUT
O
Rch “0” detect Flug (Not used.)
100
LMUT
O
Lch “0” detect Flug (Not used.)
27
CDX-M770
• IC5 CXP84640-072Q (CD SYSTEM CONTROL) (SERVO BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
ITRPT
—
Not used in this set.
2, 3
—
—
Not used in this set.
4, 5
NCO
—
Not used in this set.
6
OPEN
I
Front panel open detection input
7
CLOSE
O
Front panel close control output
8
LINKOFF
I
Bus interface link input
9
NCO
—
Not used in this set.
10
D SW
I
Down switch input (SW1)
11
SSTP
I
Limit switch input (SW4)
12, 13
NCO
—
Not used in this set.
14, 15
—
—
Not used in this set.
16
EMPH O
O
De-emphasis ON/OFF control output
17
CDMON
O
CD mechanism deck power control output
18
CD ON
O
CD power control output
19
A MUT
O
System attenuate control output
20
LD ON
O
Laser power ON/OFF control output
21
CD RST
O
CD system reset output
22
HOLD
O
Hold switch output
23
AGC CONT
O
AGC control output
24
—
—
Not used in this set.
25
PH3
I
Not used in this set.
26
TSTIN0
I
Not used in this set.
27
TSTIN1
I
Not used in this set.
28
TST.CLV
I
Not used in this set.
29
NCO
—
Not used in this set.
30
RESET
I
System reset input (“L”=Reset)
31
X IN
I
X’tal oscillator input from system clock. (10 MHz)
32
X OUT
O
X’tal oscillator output for system clock. (10 MHz)
33
GND
—
Analog ground
34
XT OUT
O
Not used in this set.
35
XT IN
I
Not used in this set.
36
AVSS
—
A/D converter ground
37
AVREF
I
A/D converter reference voltage input
38
TEP L
I
Not used in this set.
39
TEP H
I
Not used in this set.
40
SLED–
I
Sled drive input
41
PH2
I
Not used in this set.
42
SEK/SMET
I
Fixed at “H” in this set.
43
GFS/MNT2 SEL
I
Fixed at “H” in this set.
44
SC-JIG ON/OFF
I
Fixed at “H” in this set.
45
SCLK
O
CD-TEXT data read clock output
46
LOCK
I/O
Lock signal input/output
47
—
—
Not used in this set.
48
SCK2
O
Sub Q read clock output
49
SI2
I
Sub Q 80 bit, PCM peak and level data 16 bit input.
50
—
—
Not used in this set.
51
BUS CLK
I/O
Bus system serial clock input/output
52
BUS SI
I
Bus system serial interface input
53
BUS SO
O
Bus system serial interface output
54
F OK
I
Focus OK signal input
55
GFS
I
GFS signal detection input
56
TEST MODE
I
Fixed at “H” in this set.
28
CDX-M770
Pin No.
Pin Name
I/O
Pin Description
57
SENS
I
SENS signal input
58
—
—
Not used in this set.
59
—
—
Not used in this set.
60
BU.IN
I
Back-up power detection input
61
BUSON
I
Bus on control input
62
IN SW
I
Disc in switch input (SW3)
63
SELF SW
I
Self switch input (SW2)
64
SCOR
O
Sub-code sync output
65 CD-CKO O CD signal process serial clock output
66
LM LOD
O
Loading motor control output
67
CD DATA
O
CD signal process serial data output
68
CD-XLAT
O
CD signal process serial data latch output
69
LM-EJ
O
Loading motor control output
70
DRV-OE
O
Focus/tracking coil/sled motor control output
71
MD2
O
Digital out ON/OFF control output (“L”: OFF, “H”: ON)
72
VDD
—
Power supply pin
73
NIH
I
Fixed at “H” in this set.
74
V/Z
I
Fixed at “H” in this set.
75
PH1
I
Not used in this set.
76
—
—
Not used in this set.
77
DOUT-SEL
I
Fixed at “H” in this set.
78 – 80
—
—
Not used in this set.
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