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Sony MDX-C800REC Service Manual page 29

Fm/am mini disc recorder
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• IC700 MB90574PMT-G-259-BND (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
1
TUN ON
O
Tuner power control output (TU +5.6 V)
2
SET UP
O
Not used in this set (Open)
3
FM ON
O
Not used in this set (Open)
4
AM ON
O
Not used in this set (Open)
5
N.C.O
O
Not used in this set (Open)
6
SYS RESET
O
SONY BUS system reset output (SONY BUS interface to CD, external control)
7
BUS ON
O
SONY BUS on control output (SONY BUS interface to CD, external control)
8
VCC
—
+5 V power supply pin
Flash drive power control output (ILL ON power supply)
9
FLS PON
O
"H" is output when flash read.
10
EEDATA
O
EEPROM data output
11
EECLK
O
EEPROM CLK output
12
DOOR SW/RXD
I
Door open/close detection input
13
TXD
O
Serial data output
14
N.C.O
O
Not used in this set (Open)
15
BEEP
O
Beep output
16
AMP MUTE
O
Power amplifier mute output
17 – 19
N.C.O
O
Not used in this set (Open)
20
UNI SI
I
SONY BUS serial data input (SONY BUS interface to CD, external control)
21
UNI SO
O
SONY BUS serial data output (SONY BUS interface to CD, external control)
22
UNI CLK
I/O
SONY BUS serial clock input/output (SONY BUS interface to CD, external control)
23
N.C.O
O
Not used in this set (Open)
24
SIRCS
I
Remote commander (infrared rays reseiver) input
25 – 29
N.C.O
O
Not used in this set (Open)
30
SW SHIFT
O
Tuner switch shift output
31
N.C.O
O
Not used in this set (Open)
32
TUNER MUTE
O
Tuner mute control output (AM DET MUTE)
33
VSS
—
Ground pin
34
C
—
Capacitance connect pin of power supply stabilization
35
AD ON
O
Power supply control output for AD conversion
36
RDS ON
O
Power supply signal output to RDS (Not used in this set (Open))
37
N.C.O
O
Not used in this set (Open)
38
DVCC
—
D/A converter VRER pin
39
DVSS
—
D/A converter GND pin
40
POWER ON
O
System power supply control output
41
N.C.O
O
Not used in this set (Open)
42
AVCC
—
Analog power supply pin
43
AVRH
I
A/D converter Vref (+) pin
44
AVRL
I
A/D converter Vref (–) pin
45
AVSS
—
Analog ground pin
46
KEY IN0
I
Key signal input 0 (A/D analog input)
47
KEY IN1
I
Key signal input 1 (A/D analog input)
48
DSTSEL0
I
Initial setting input of destination
49
RC IN0
I
Key input of rotary commander (A/D analog input)
50
QUALITY
I
Noise detection input (A/D analog input)
51
FM AGC
I
FM AGC detection input (A/D analog input)
52
MPT
I
Multipath detection input (A/D analog input)
53
VSM
I
Signal meter detection input (A/D analog input)
54
VCC
—
+5 V power supply pin
55, 56
N.C.O
O
Not used in this set (Open)
57
E-VOL MOTE
O
Electron volume mute output
58
N.C.O
O
Not used in this set (Open)
Pin Description
"L": close, "H": open
"L": off, "H": on
29
Pin No.
Pin Name
I/O
59
MUTE
O
LINE level mute output
60
AMP ON
O
Power amplifier standby control output (to STNBY pin of power IC)
61
N.C.O
O
Not used in this set (Open)
62
FLASH WHT
I
Flash memory read mode detect input
63
VSS
—
Ground pin
64
RE IN0
I
Rotary encoder input 0
65
PWM
I
D/D converter oscillator frequency signal input
66
RE IN1
I
Rorary encoder input 1
67
MD BOOT
I
Flash write select input
68
N.C.O
O
Not used in this set (Open)
69
RAM BU
I
RAM reset detection input
70
II DATA
I/O
I2C BUS serial data input/output (SONY BUS interface to tuner, electron volume, RDS.)
71
II CLK
I/O
I2C BUS serial clock input/output (SONY BUS interface to tuner, electron volume, RDS.)
72
RC IN1
I
Shift input of rotary commander
73
X1A
I
Low speed oscillator connect pin (32,768 kHz)
74
X0A
O
75
SHIFT
O
D/D converter frequency change signal output
76
KEYACK
I
Key acknowledge input
77
BU IN
I
Backup voltage detection input
78
DAVN
I
Block synchronization detection input of RDS data
79
TEL ATT
I
Telephone (TEL) detection input
80
TEST IN
I
Test mode setting pin
Display microcomputer frash write setting output
81
DP BOOT
O
"L" is output when write of display microcomputer
82 – 84
N.C.O
O
Not used in this set (Open)
85
NS MASK
O
Noise mask output
86
HSTX
I
Hardware standby input (This set connect to RSTX.)
87
MD2
I
Input for operation mode (This set connect to VSS.)
88
MD1
I
Input for operation mode (This set connect to VCC.)
89
MD0
I
Input for operation mode (This set connect to VCC.)
90
RSTX
I
Reset input
91
VSS
—
Ground pin
92
X0
O
High speed oscillator connect pin (3.6864 MHz)
93
X1
I
94
VCC
—
+5 V power supply pin
95
N.C.O
O
Not used in this set (Open)
96
PARKING
I
Parking brake detection input
97
N.C.O
O
Not used in this set (Open)
98
SHIN
O
Not used in this set (Open)
99
N.C.O
O
Not used in this set (Open)
100
ILL IN
I
Illumination (ILL IN) detection input
101
NOSE SW
I
Front panel attachment detection input
102
PACK IND
O
Door indicator output
103
PD
O
Codec power supply control output
104
SERVO-ON
I
Servo power supply control signal input from mechanism microcomputer
105
ACC IN
I
Accessory power supply (ACC) detect input
106
SMUTE
O
Codec mute signal output
107 – 118
N.C.O
O
Not used in this set (Open)
119
VSS
—
Ground pin
120
LOW +B CHK
O
Low battery check output
29
Pin Description
"L": packing condition
"L": on, "H": off
"H": on
"H": mute

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