Sony HCD-VX555 / HCD-VX555J / MHC-VX555 / MHC-VX555J Service Manual ▷ View online
49
49
HCD-VX555/VX555J
6-25. SCHEMATIC DIAGRAM – TRANS SECTION –
50
50
HCD-VX555/VX555J
6-26. PRINTED WIRING BOARD – SW SECTION –
6-27. SCHEMATIC DIAGRAM – SW SECTION –
IC 401
IC 781
TO
MAIN
BOARD
(Page 27)
MAIN
BOARD
(Page 27)
P
TO
VIDEO
BOARD
(Page 44)
VIDEO
BOARD
(Page 44)
TO
PANEL
BOARD
(Page 36)
PANEL
BOARD
(Page 36)
O
R
L
J 402
AUDIO OUT
• See page 22 for Circuit Boards Location.
51
HCD-VX555/VX555J
6-28. IC PIN FUNCTION DESCRIPTION
• IC501 M30620MCA-A95FP (MASTER CONTROL) (MAIN BOARD)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
I/O
O
I
I
I
O
O
O
—
—
I
O
I
O
—
I
—
I
I
I
I
O
O
O
O
I
O
O
O
O
O
—
I
O
I
O
—
O
O
O
O
O
O
O
O
O
I
I
I
I
—
Pin Name
AUDIO-OUT
STEREO
TUNED
SIRCS
SUR1
SUR2
SUR3
N.C.
N.C.
XC-IN
XC-OUT
RESET
X-OUT
VSS
X-IN
VCC
NMI
RDS-INT
SCOR
RDS-DATA
ST-MUTING
ST-CE
ST-DOUT
BU-PWM3
ST-DIN
BU-PWM2
ST-CLK
BU-PWM1
IIC CLK
IIC DATA
N.C.
SQ-DATA
SQ-CLK
SENS
CD-DATA
N.C.
CD-CLK
CD-POWER
CLOCK-OUT
HOLD
M-RESET
XLT
XRST
LOAD-IN
LOAD-OUT
OPEN-SW
CLOSE-SW
BU UP/DOWN-SW
T-SENS
N.C.
Description
Audio out ON/OFF signal (H=ON,L=OFF)
STEREO detect signal input (L=ON,H=OFF)
TUNED detect signal input (L=ON,H=OFF)
Remote control receiver data signal input
Not used
Not used
Not used
Connected to ground
Connected to ground
Sub clock input
Sub clock output
System reset input
Main system clock output
Ground
Main system clock input
Power supply (+5V)
Not used (connected to Vcc)
RDS interrupt signal input
CD Q-data signal input
RDS data signal input
Tuner muting signal output
Tuner chip enable output
Tuner data signal output
BU PWM signal output
Tuner data signal input
BU PWM signal output
Tuner clock signal output
BU PWM signal output
IIC CLS output
IIC SDA output
Not used
CD SQ data input
CD SQ clock output
BD condition signal input
CD data signal output
Not used (connected to ground)
CD clock signal output
CD power control signal output (H=ON,L=OFF)
Test point (clock check)
MODE signal output
Display control IC reset signal output
CD LAT signal output
CD reset sgnal output
Loading motor control signal output
Loading motor control signal output
Tray open detect signal input
Tray close detect signal input
Pick-up up/down detect signal input
CD table detect signal input
Not used (connected to ground)
52
HCD-VX555/VX555J
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
O
O
I
O
O
I
I
O
I
O
O
—
O
—
O
O
O
O
O
I
—
—
I
I
O
—
—
O
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
O
O
—
I
—
—
I
Pin Name
A-TRG
B-TRIG
AMS-IN
CAPM-H/L
CAPM-CONTROL
A-PLAY
B-PLAY
TC-MUTING
REC/PB/PAS
NR-ON/OFF
REC-MUTING
VCC
SOFT-TEST
VSS
BIAS
EQ-H/N
PB-A/B
ALC
TC-RELAY
A-HALF
N.C.
N.C.
DISPLAY KEY
POWER KEY
STBY LED
N.C.
N.C.
GAME/VIDEO
DBFB
GEQ-DATA
GEQ CLK
LINE-MUTING
STK-MUTING
STBY-RELAY
REAR-RELAY
SURR-RELAY
FRONT-RELAY
PROTECT
A-SHUT
B-SHUT
B-HALF
MODEL-IN
SPEC-IN
FREQ-B
FREQ-A
AVSS
BOOSTER-SW
VREF
AVCC
AC-CUT
Description
A deck trigger control signal output
B deck trigger control signal output
AMS signal input (L=ON,H=OFF)
Capstan motor High/Low speed control signal output
Capstan motor REV/FWD/STOP control signal output
A deck play detect signal input
B deck play detect signal input
Tape deck line muting signal output (H=ON,L=OFF)
REC/PB/PAS select signal input (L=REC,Z=PB,H=PAS)
DOLBY NR ON/OFF signal output (H=ON,L=OFF)
REC MUTING ON/OFF signal output (L=ON,H=OFF)
Power supply (+5V)
Test point (soft check out)
Ground
BIAS ON/OFF signal output (H=ON,L=OFF)
EQ High/Normal select signal output (H=High,L=Normal)
Playback deck A/B select signal output (L=A,H=B)
ALC ON/OFF signal output (L=ON,H=OFF)
Tape deck relay ON/OFF signal output (H=ON,L=OFF)
A deck half detect signal input
Not used (connected to ground)
Not used (connected to ground)
Display key detect signal input
Power key detect signal input
Standby LED ON/OFF signal output (H=ON,L=OFF)
Not used (connected to ground)
Not used (connected to ground)
GAME/VIDEO select signal output (L=GAME,H=VIDEO)
DBFB ON/OFF signal output (L=ON,H=OFF)
Data signal output for IC101
Clock signal output for IC101
LINE muting ON/OFF signal output (H=ON,L=OFF)
Power amplifier ON/OFF signal output (H=ON,L=OFF)
Standby relay ON/OFF signal output
Not used
Not used
Front speaker relay ON/OFF signal output (H=ON,L=OFF)
Speaker protect ON/OFF signal input (L=ON,H=OFF)
A deck reel pulse signal input
B deck reel pulse signal input
B deck half detect signal input
MODEL input
Version select input
Not used
Not used
Analog ground
Not used
Analog reference voltage
Analog power supply
AC_CUT ON/OFF check (L=ON,H=OFF)
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