Sony MDX-C800REC Service Manual ▷ View online
25
3
K 2x3
4
K 2x3
5
optical pick-up
6
main shaft
1
OWH flexible board
2
OWH flexible board
2-15. OPTICAL PICK-UP
26
3-1. IC PIN DESCRIPTIONS
• IC560 MB90574FPV-G-297-BND (MD CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
SCTX
O
Write data transmission timing output to CXD2652AR, ON/OFF output of magnet
head
2
LDON
O
Laser ON/OFF control output (“H”: Laser ON)
3
LOAD
O
Loading motor control output (Loading direction)
4
EJECT
O
Loading motor control output (Eject direction)
5
MDMON
O
MD mechanism deck power supply control output
6
LNKOFF
O
LINK OFF output to SONY BUS (“H”: LINK OFF, “L”: LINK ON)
7
UNIREQ
O
Request output to SONY BUS (“H”: Request ON) (Not used in this set.)
8
VCC
—
Power supply pin (+5 V)
9, 10
NC
—
Not used (Open)
11
FLASH-W
I
Select input for flash write (“L”: Flash write mode)
12
RXD/DSPSI
I
UART RXD data input
13
TXD/DSPSO
O
UART TXD data output
14
LIMIT-IN
I
Sled innermost track detection switch input (“L”: Innermost track)
15
EE CKO
O
Serial clock output for EEPROM
16
EE SIO
I/O
EEPROM data input/output
17
SENS IN
I
Disk photo sensor input (“H”: With desk)
18, 19
NC
—
Not used (Open)
20
SRDT
I
Data input from MD servo IC
21
SWDT
O
Data output to MD servo IC
22
SCLK
O
Clock output to MD servo IC
23, 24
NC
—
Not used (Open)
25
UNISI
I
Data input from SONY BUS
26
UNISO
O
Data output to SONY BUS
27
UNCKI
I
Clock input from SONY BUS
28
MOD
O
Laser modulation select signal output
29, 30
NC
—
Not used (Open)
31
FOPEN
I
Front panel open signal input
32
CLOSE OK
O
Front panel open/close request signal output
33
VSS
—
Ground pin
34
C
—
Power stabilization capacitor pin
35
AGCHK
O
Effect output when aging operation end of test mode
36
AGING
O
Output of aging operation condition when test mode (Normally, open)
37
TFTON
O
Output of drop running condition when test mode (Normally, open)
38
DVCC
—
Power supply pin for D/A converter (+5 V)
39
DVSS
—
Ground pin for D/A converter
40
ERR-PWM
O
PWM output of error rate (Normally, open)
41
ADER-PWM
O
PWM output of AD error (Normally, open)
42
AVCC
—
Power supply pin for A/D converter (+5 V)
43
AVRH
—
External reference power supply for A/D converter (Connect to AVCC in this set.)
44
AVRL
—
External reference power supply for A/D converter (Connect to AVSS in this set.)
45
AVSS
—
Ground pin for A/D converter
46
NC
—
Not used (Open)
47
ACNT
I
A/D input for designation on aging times of LOADING/EJECT
48
DOB-SEL
I
A/D input for designation on digital out bit number (Fixed at “H” in this set)
49
INIT
I
Initial input when reset
50, 51
TEST 0, 1
I
Test pin (Normally, open)
52
REF-SEL
I
Reference select input (Fixed at “L” in this set.)
53
NC
—
Not used (Open)
54
VCC
—
Power supply pin (+5 V)
55
TSTMOD
I
Test mode input (“L”: Test mode)
SECTION 3
DIAGRAMS
27
Pin No.
Pin Name
I/O
Pin Description
56
TSTSO
O
Data output for test mode display (Normally, open)
57
TSTCKO
O
Clock output for test mode display (Normally, open)
58 – 62
NC
—
Not used (Open)
63
VSS
—
Ground pin
64
NC
—
Not used (Open)
65
DACRST
O
Reset output to DAC IC
66
DACCES
O
Chip enable output to DAC (SUB)
67
DAC SO
O
DAC control serial data output
68
DAC CKO
O
DAC control serial clock output
69
DAC CEF
O
Chip enable output to DAC (FRONT)
70
DAC CER
O
Chip enable output to DAC (REAR)
71, 72
NC
—
Not used (Open)
73
XIA
—
Input for sub clock oscillation (Fixed at “H” in this set)
74
XOA
—
Input for sub clock oscillation (Connect to ground pin in this set)
75
CC-XINT
I
XINT interruption input from MD servo IC
76
BUS-ON
I
BUS ON input of SONY BUS
77
BU-IN
I
Power instantaneously cut off check port of system
78
SQ-SY
I
SUBQ SYNC interruption input from MD servo IC
79
DISC-IN
I
DISC-IN (cartridge in switch) sensor input of MD mechanism deck
80
A-ATT
O
Audio attenuator output (“H”: ATT ON)
81
DQ-SY
I
Subcord Q sync of DIGITAL IN U-bit CD format from MD servo IC
82
NC
—
Not used (Open)
83
EJECT IN
I
EJECT (MD) switch input
84
SORCE
I
Select signal input of signal input (analog/digital input) (Not used in this set)
85
LOCK
O
Output of CLV lock condition when test mode (Normally, open)
86
HSTX
—
Hardware standby input (Connect to SYSRST in this set)
87
MD2
—
CPU operation mode designation input (Connect to ground pin in this set)
88, 89
MD1, 0
—
CPU operation mode designation input (Fixed at “H” in this set)
90
RSTX
—
Reset input (Fixed at “H” in this set)
91
VSS
—
Ground pin
92
X0
I
Main clock oscillation input (3.68 MHz)
93
X1
O
Main clock oscillation output (3.68 MHz)
94
VCC
—
Power supply pin (+5 V)
95, 96
NC
—
Not used (Open)
97
RAMBU
I
RAM backup detection input
98, 99
NC
—
Not used (Open)
100
MD/REC-ON
O
Power control output for overlight head
101
RF-ON
O
Power control output for RF AMP
102
REC-P
I
Detection signal input from REC position detection switch (“L”: REC position)
103
PLAY-P
I
Detection signal input from PLAY position detection switch (“L”: PLAY position)
104
PROTECT
I
Recording prevention claw detection input from write protect detection switch
(“H”: Write Protect)
105
REFLECT
I
Desk reflectance detection input from reflect detection switch
(“H”: Low reflectance disk IN)
106
PACK-IN
I
PACK-IN (LOADING END SENSOR) sensor input of MD mechanism deck
107
NC
—
Not used (Open)
108
REC/PLAY
I
Change select input on recording mechanism deck and playing mechanism deck
(“H”: REC, “L”: PLAY) (Fixed at “H” in this set)
109
DFCTSEL
I
Select input on used of DEFECT2 function (Not used in this set (Fixed at “H”)
110
WRPWR
O
Laser power select signal output to optical pick-up or CXD2652AR
(“L”: READ POWER, “H”: WRITE POWER)
111
PREHEAT
O
Preheat control output (“H”: Preheat ON)
112
MDRST
O
Reset output to MD servo IC
28
Pin No.
Pin Name
I/O
Pin Description
113
MDLAT
O
Latch output to MD servo IC
114
SERVO-ON
O
Power control output to MD servo IC
115 – 118
MNT3 – 0
I
Monitor 3 – 0 input of CXD2652AR
119
VSS
—
Ground pin
120
SENS
I
Sens input from MD servo IC
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