Sony HCD-EC50DC / MHC-EC50DC Service Manual ▷ View online
45
HCD-EC50DC
PANEL BOARD IC701 MB90802-108 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
P24
O
Power relay control signal output
2
P25
O
Amp control signal output
3
P26
O
System reset signal output to the RF AMP
4
P27
O
Control signal output to the PB/REC EQ AMP/FUNCTION CONTROLLER
5
P30/SO3
O
Serial data output to the MP3 decoder
6
P31/SC3
O
Serial data transfer clock signal output to the MP3 decoder
7
P32/SI3
I
Serial data input from the MP3 decoder
8
P33/TMCK
O
Latch pulse signal output to the RF AMP
9
P34/IC0
I
Remote sensor signal input
10
P35/IC1
O
Serial data latch pulse output to the MP3 decoder
11
P36/OCU0
O
M-MUTE signal output to the MP3 decoder
12
P37/OCU1
O
Data transfer request signal output to the MP3 decoder
13
X0A/P90
O
Resonator output terminal (32.768kHz)
14
X1A/P91
I
Resonator input terminal (32.768kHz)
15
VCC
—
Power supply terminal (+3.3V)
16
VSS
—
Ground terminal
17
P40/LED0
O
STANDBY LED control signal output
18
P41/LED1
I
CD switch (SW3) input terminal
19
P42/LED2
I
CD switch (SW1) input terminal
20
P43/LED3
I
CD switch (SW2) input terminal
21
P44/LED4
O
Loading motor control signal output
22
P45/LED5/TOT0
O
Loading motor control signal output
23
P46/LED6/TOT1
O
Elevator up/down motor control signal output
24
P47/LED7/TOT2
O
Elevator up/down motor control signal output
25
P50/TIN0
I
CD chuck switch (SW7) input terminal
26
P51/TIN1
I
CD close switch (SW6) input terminal
27
P52/TIN2/PPG0
I
CD stock switch (SW5) input terminal
28
P53/PPG1
I
CD open switch (SW8) input terminal
29
P54/SI0
I
Internal status (SENSE) input from the CD DSP
30
P55/SC0
O
Serial data transfer clock signal output to the CD DSP
31
P56/SO0
O
Serial data output to the CD DSP
32
AVCC
—
Power supply terminal (+3.3V)
33
P57/SI1
I
Data input from the the tuner
34
P76
O
Oscillator control signal output to the CD DSP
35
AVSS
—
Ground terminal
36
P60/AN0
I
Power detection signal input
37
P61/AN1
I
Key AD input1
38
P62/AN2
I
Key AD input2
39
P63/AN3
I
Tuner tuned status analog SD signal input
40
P64/AN4
I
Tape mecha status (PLAY, REC) detect signal input
41
P65/AN5/INT0
I
Key wake-up input
42
P66/AN6/INT1
I
System controller stop mode control signal input
43
P67/AN7/INT2
I
CD-DSP SCOR signal input
44
VSS
—
Ground terminal
45
P70/AN8/INT3
I
Signal input from the encoder
46
P71/AN9/SC1
I
Audio level signal input
47
P72/AN10/SO1
O
STANDBY LED control signal output
48
P73/AN11/SI2
I
Signal input from the volume encoder
46
HCD-EC50DC
Pin No.
Pin Name
I/O
Description
49
P74/SDA/SC2
I
Data transfer request signal input from the MP3 decoder
50
P75/SCL/SO2
I
Acknowledge signal input from the MP3 decoder
51
MD2
I
Input pin for selecting operation mode (Connected to ground)
52
MD1
I
Input pin for selecting operation mode (Connected to +3.3V)
53
MD0
I
Input pin for selecting operation mode (Connected to +3.3V)
54
RSTX
I
System reset signal input terminal
55
V0/P80
O
Tuner chip enable signal output to the tuner
56
V1/P81
O
Clock signal output to the tuner
57
V2/P82
O
Data output to the tuner
58
V3
I
Reference power terminal of LCD controller/driver
59, 60
COM0, COM1
O
Common signal output to the LCD
61, 62
P83/COM2, P84/COM3
O
Common signal output to the LCD
63, 64
SEG0, SEG1
O
Segment signal output to the LCD
65
VCC
—
Power supply terminal (+3.3V)
66
VSS
—
Ground terminal
67 to 84
SEG2 to SEG19
O
Segment signal output to the LCD
85 to 89 SEG20/P10 to SEG24/P14
O
Segment signal output to the LCD
90
VCC
—
Power supply terminal (+3.3V)
91
VSS
—
Ground terminal
92
X1
I
Resonator input terminal (4.19MHz)
93
X0
O
Resonator output terminal (4.19MHz)
94 to 96 SEG25/P15 to SEG27/P17
O
Segment signal output to the LCD
97 to 100 SEG28/P20 to SEG31/P23
O
Segment signal output to the LCD
47
HCD-EC50DC
SECTION 8
EXPLODED VIEWS
NOTE:
•
-XX and -X mean standardized parts, so they
may have some difference from the original
one.
may have some difference from the original
one.
•
Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
•
The mechanical parts with no reference
number in the exploded views are not supplied.
number in the exploded views are not supplied.
Ref. No.
Part No.
Description
Remark
8-1.
OVERALL SECTION
The components identified by mark 0 or
dotted line with mark 0 are critical for safety.
Replace only with part number specified.
dotted line with mark 0 are critical for safety.
Replace only with part number specified.
Ref. No.
Part No.
Description
Remark
2
4
6
4
4
5
4
3
chassis section
#1
#4
#4
#4
#1
front panel
section
1
4
5
4
top section
F001
4
c
c
a
a
b
b
not
supplied
not
supplied
1
2-649-129-11 PANEL (L), SIDE
2
2-649-133-61 CABINET, REAR
3
2-649-130-11 PANEL (R), SIDE
4
3-254-143-11 SCREW (B3), (+) BV TAPPING
5
3-363-099-32 SCREW (CASE 3 TP2)
6
4-951-620-01 SCREW (2.6X8), +BVTP
0 F001
1-532-505-33 FUSE (T5AL/250V)
#1
7-685-247-14 SCREW +KTP 3X10 TYPE2 NON-SLIT
#4
7-685-647-79 SCREW +BVTP 3X10 TYPE2 N-S
48
HCD-EC50DC
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
8-2.
FRONT PANEL SECTION
55
53
58
51
62
63
54
56
64
64
63
63
57
52
63
61
60
59
not
supplied
not
supplied
including
No.58
not
supplied
not
supplied
not
supplied
not
supplied
not
supplied
not
supplied
not
supplied
not
supplied
not
supplied
51
2-649-118-11 CABINET, FRONT
52
2-649-123-02 BUTTON (EQ)
53
2-649-126-01 KNOB (VOL)
54
2-649-119-21 WINDOW (DISPLAY)
55
2-649-122-02 BUTTON (OPE)
56
2-649-124-03 BUTTON (DISC)
57
2-649-120-01 REFLECTOR (POWER)
58
2-649-121-01 BUTTON (POWER)
59
2-649-648-02 BUTTON (DSGX)
60
1-832-657-21 CABLE, FLEXIBLE FLAT (29 CORE)
61
A-1193-867-A PANEL BOARD, COMPLETE
62
A-1193-868-A JACK BOARD, COMPLETE
63
4-951-620-01 SCREW (2.6X8), +BVTP
64
4-225-252-01 CUSHION (FOOT)
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