Sony CX-LEM550 / XR-EM550 Service Manual ▷ View online
29
CX-LEM550
IC251
BA5947FM
1
LEVEL SHIFT
MUTING
D
15
16
+
–
+
–
D
D
17
18
D
19
20
VREF
21
22
23
24
25
26
27
28
PREVCC
OPOUT
OUTVREF
CH4CAPA
CH4IN
CH3FIN
CH3RIN
GND
MUTE
POWVCC
CH3OUTF
CH3OUTR
CH4OUTF
CH4OUTR
OPIN
–
2
OPIN+
INTERFACE
14
13
D
12
11
D
10
9
8
7
6
CH2FIN
CH2RIN
GND
5
4
CH1FIN
CH1RIN
VREFIN
POWVCC
CH2OUTR
CH2OUTF
CH1OUTR
CH1OUTF
INTERFACE
D
D
3
SW
INTERFACE
IC303
BH15FB1WG
THERMAL
PROTECTION
VOLTAGE
REFERENCE
CONTROL
BLOCK
OVER CURRENT
PROTECTION
VIN
+
−
1
GND
2
STBY
3
NC
4
V
OUT
5
30
CX-LEM550
IC301
TC94A34FG-002
33
34
35
36
37
38
39
40
41
42
1
8
43
57
62
58
61
56
63
52
50
47
46
45
44
48
49
25
26
27
28
29
30
31
32
17
18
19
20
21
22
23
24
9
10
11
2
3
4
5
6
7
64
55
53
51
12
13
14
15
16
54
SDO2/
/CS/
/RAS
/CS/
/RAS
PO12/
AD15/
/CAS
AD15/
/CAS
SDO3/
/OE
/OE
TXO
DIT
Bus
Switch
BUCK/
PO11/
AD14
PO11/
AD14
/CCE/
PO10/
AD13
PO10/
AD13
PO9/AD12
PO8/AD11
VDDM
General
Input/
Output
Port
Address Calc.
2sets
Y-
P
ointer
register
C-P
ointer
register
CDP
Control
I/F
Sub Code I/F
X-P
ointer
register
SRMSTB
VDDT
AD10
AD9
AD8
PO7AD7
PO6/AD6
PO5/AD5
YRAM
4k w
ord
CRAM
4k w
ord
ERAM
4k w
ord
x1
2k w
ord
x1
CR
OM
4k w
ord
x9
XRAM
4k w
ord
Timer
Flag
Interrupt
Control
SRAM/DRAM
I/F
SRAM I/F
1k bit
SRAM
X-Bus
Y
-Bus
VCO
Timing
Generator
PRAM
4k w
ord
PR
OM
4k w
ord
x5
40 bit
Instr
uction
Decoder
Prog
ra
m
Control
MCU I/F
register
XO/X1/X2
Y0/Y1/Y2
MX
MY
MZ
MA
C
A0
A1
AX
AY
ALU
A2
A3
round & limit
round & limit
A
udio I/F
SBSY/
BCKIB
D
ATA
/
SDI1
LRCKIA
BCKIA
SDI0
LRCKO
BCKO
SDO0
VDDT
VSS
/MIACK/
AD16
/MICK
MIDIO
/MILP
/MICS
STANDBY
/RESET
VDDP
PO4/
AD4
PO3/
AD3
PO2/
AD2
PO0/
AD0
VSS
PO1/
AD1
VDD
VSSP
VCOI
VDDX
TEST
60
VSSX
CK
O/
PO13/
AD16
MIMD
59
XI
XO
CKI/CLCK/
IRQ/FI0
VDD
VSS
PIO0/
SDI2/IO0
PIO1/
SDI3/IO1
PIO2/
IO2
PIO3/
IO3
B
US3/FI1/
PIO4/IO4
B
US2/FI2/
PIO5/IO5
B
US1/FI3/
PIO6/IO6
B
US0/
PIO7/IO7
SDO1//WE
SFSY/
LRCKIB
JT
A
G
I/F
31
CX-LEM550
IC302
BD3881FV
28
REC1O
27
REC1N
26
REC2N
25
REC2O
24
INC2
23
INC1
22
INB2
21
INB1
20
INA2
19
INA1
18
OUT1
17
BAS1
16
OUT2
15
BAS2
BASS
BASS
13
CONT
14
VEE
12
VDD
11
TRE2
10
TRE1
TREBLE
TREBLE
7
VOLIN1
8
VOLIN2
9
GND
VOLUME
VOLUME
6
PB1O
LOGIC
CONTROL
5
PB2O
4
PB2N
1
PB1N
2
PB1P
3
PB2P
– MAIN Board –
32
CX-LEM550
• IC Pin Function Description
• CONTROL BOARD IC801 LC876980B-52T4-E (SYSTEM CONTROLLER)
• CONTROL BOARD IC801 LC876980B-52T4-E (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
MI-ACK
I
Acknowledge signal input from the MP3 decoder
2
MP3-RST
O
Reset signal output to the MP3 decoder
3
MP3-REQ
I
Request signal input from the MP3 decoder
4
MI-CS
O
Chip select signal output to the MP3 decoder
5
MI-LP
O
Serial data latch pulse output to the MP3 decoder
6
MP3-STB
O
Standby control signal output to the MP3 decoder
7
XTCN
O
Oscillation circuit control signal output to the CD DSP
“H”: auto oscillation, “L”: oscillation off
8
X-RST
O
Reset signal output to the CD DSP
9
XLT
O
Serial data latch pulse output to the CD DSP
10
SCOR
I
Subcode sync (S0+S1) detection signal input from the CD DSP
11
RESET
I
Reset signal input from the reset switch “L”: reset For several hundreds msec.
after the power supply rises, “L” is input, then it changes to “H”
12
I-XT1
I
Sub system clock input terminal (32.768 kHz)
13
O-XT2
O
Sub system clock output terminal (32.768 kHz)
14
VSS1
—
Ground terminal
15
XIN
I
Main system clock input terminal (10 MHz)
16
XOUT
O
Main system clock output terminal (10 MHz)
17
VDD1
—
Power supply terminal (+3.2V)
18
I-POWER_MONITOR
I
Power monitor input terminal
19
MODEL DETECT
I
Model destination setting terminal
20
KEY1
I
Front panel key input terminal (A/D input)
21
AREA
I
Model destination setting terminal
22
VOL_ENCODER
I
Dial pulse input of the rotary encoder (for VOLUME control)
23
I_POWER_DOWN
I
Power down detection signal input terminal “L”: power down, normally : “H”
24
TA-SW
I
Cassette in/out detect switch signal input from the tape mechanism deck
“L”: cassette in
25
RDS-DATA
I
RDS serial data input from the FM/AM tuner unit
26
RDS-CLK
I
RDS serial data transfer clock signal input from the FM/AM tuner unit
27
KEY0
I
Front panel key input terminal (A/D input)
28
F-DATA
O
Serial data output to the electrical volume
29
RMC_IN
I
Remote control signal input from the remote control receiver
30
NC VREF
—
Not used
31 to 42
G1 to G12
O
Grid drive signal output to the fluorescent indicator tube
43 to 45
S1 to S3
O
Segment drive signal output to the fluorescent indicator tube
46
VDD3
—
Power supply terminal (+3.1V)
47 to 50
S4 to S7
O
Segment drive signal output to the fluorescent indicator tube
51
VP
—
Power supply terminal (–29V)
52 to 60
S8 to S16
O
Segment drive signal output to the fluorescent indicator tube
61 to 65
NC
—
Not used
66
CD OPEN
I
CD lid open/close detection switch input terminal
67
TA END SW
I
END switch signal input from the tape mechanism deck
68
TA PLAY SW
I
PLAY switch signal input from the tape mechanism deck
69
NC
—
Not used
70
TU STEREO
I
FM stereo detection signal input from the FM/AM tuner unit
71
TU TUNED
I
Tuning detection signal input from the FM/AM tuner unit
72
VDD4
—
Power supply terminal (+3.1V)
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