Sony MHC-VX333 (serv.man2) Service Manual ▷ View online
41
41
HCD-VX333
6-20. SCHEMATIC DIAGRAM DRIVER SECTION
• See page 49 for IC Block Diagrams.
CN1
(Page 28)
(4/4)
B
IC B/D
A
C
E
K
MTZJ-T
-77-3.9A
42
42
HCD-VX333
6-21. PRINTED WIRING BOARD TRANS SECTION
• See page 19 for Circuit Boards Location.
IC901
TRANS BOARD
VOLTAGE
SELECTOR
SELECTOR
TH
TH
TH
EXCEPT TH
EXCEPT TH
EXCEPT TH
EXCEPT TH
EXCEPT TH
POWER TRANSFORMER
E
C
B
SUB
TRANSFORMER
SUB TRANS BOARD
AC
IN
IN
1
2
3
E
TH
TH
1
4
G
TO
POWER AMP
BOARD
CN501
(Page 31)
POWER AMP
BOARD
CN501
(Page 31)
11
(11)
1-681-444-
11
(11)
1-681-445-
1
4
1
2
A
B
C
D
E
F
G
H
I
3
4
5
6
7
8
9
10
11
12
3
120
220
230-240
43
43
HCD-VX333
6-22. SCHEMATIC DIAGRAM TRANS SECTION
8A/250V
8A/250V
44
44
HCD-VX333
6-23. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC401 M30622MAA (MASTER CONTROL)
• MAIN BOARD IC401 M30622MAA (MASTER CONTROL)
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
O
I
I
O
O
O
—
—
I
O
I
O
—
I
—
I
I
I
I
I
O
I
I
O
O
I
O
—
—
—
I
I
I
O
—
O
O
—
O
O
O
O
I
O
I
I
I
I
—
Description
Serial data output to the display control.
Serial clock output to the display control.
Busy signal input from the display control. “L” : busy
Remote commander input.
Data signal output for IC301(BH3878KS2)
Latch signal output for IC301(BH3878KS2)
Clock signal output for IC301(BH3878KS2)
Connected to ground.
Connected to ground.
SUB SYSTEM CLOCK input.(32.768MHz)
SUB SYSTEM CLOCK output.(32.768MHz)
System reset input.
MAIN SYSTEM CLOCK output.(16MHz)
Connected to ground.
MAIN SYSTEM CLOCK input.(16MHz)
Power supply.(+5V)
PULL UP.(EVER+5V)
AC CUT ON(L)/OF(H) CHECK.
CD Q-data request signal input.
RDS interrupt signal input.
RDS data signal input.
Tuner mute signal output.
STEREO detect signal input.L=ON,H=OFF
TUNER detect signal input.L=ON,H=OFF
TUNER chip eneble output.
TUNER data output.
TUNER data input.
TUNER clock signal output.
Not used.
Not used.
Not used.
Subcode Q data input(CD data).
Subcode Q data input(CD clock).
BD condition signal input.
CD data output.
Not used.
CD clock output.
CD-POWER ON/OFF signal output.H=ON,L=OFF
Not used.
MODE signal input.
Micom reset signal output to the display control. “L” : reset
CD latch signal output.
CD reset signal output.
Loading motor control signal input.
Loading motor control signal output.
Tray open detect signal input.
Tray close detact signal input.
Pick-up up/down detect signal input.
CD table detect signal input.
Not used.
Pin Name
S-OUT
S-CLK
S-BSY
REMOTE IN
3878-DAT
3878-LAT
3878-CLK
BYTE
CN VSS
XC IN
XC OUT
RESET
X OUT
VSS
X IN
VCC
NMI
AC-CUT
RCOR
RDS-INT
RDS-DATA
ST-MUTE
STEREO(IN)
TUNER
ST-CE
ST-DOUT
ST-DIN
ST-CLK
VCD
VCD
NO USE
SQ-DAT IN
SQ-CLK
SENS
CD-DAT OUT
CAN’T-USE
CD-CLK
CD-POWER
CLOCK-OUT
HOLD
M-RESET
XLT
XRST
LOAD-IN
LOAD-OUT
OPEN
CLOSE
UP/DOWN
T-SENS
GAME/DVD
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
—
—
—
O
I
I
I
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
O
I
O
O
O
O
O
I
I
I
O
I
—
O
—
—
I
Description
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
Not used.
A deck trigger control signal output.H=ON,L=OFF
B deck trigger control signal output.H=ON,L=OFF
Power supply.(+5V)
Not used.
Connected to ground.
Capstan motor REV/FWD/STOP control signal output.H=REV,L=FWD/STOP
Detection input from the deck-B rec forward detect switch. “L” : rec
Detection input from the deck-B rec reverse detect switch. “L” : rec
A deck hafe detect signal input.
B deck hafe detect signal input.
A deck play detect signal input.
B deck play detect signal input.
AMS signal input.L=ON,H=OFF
DISPLAY KEY control signal output.
POWER KEY control signal output.
BIAS ON/OFF signal output.H=ON,L=OFF
Playback deck A/B select signal output.H=High,L=Normal
Tape deck relay ON/OFF signal output.H=ON,L=OFF
PB mute ON/OFF signal output .H=ON,L=OFF
REC mute ON/OFF signal output .H=ON,L=OFF
Serial data latch pulse output to BH3878KS2 (IC301)
Serial data latch pulse output to BH3878KS2 (IC301)
Serial data latch pulse output to BH3878KS2 (IC301)
Line mute signsl output.L=ON,H=OFF
Power amplifier mute ON/OFF signal output.H=ON,L=OFF
Speaker protect signal input.L=ON,H=OFF
STANDBY relay control signal output.
Rear speaker relay control output.
Front speaker relay control output.
A deck reel pulse detect signal output.
B deck reel pulse detect signal output.
Band pass filter signal input from the sound processor. (IC301)
MODEL
Version select signal input.
Video switch control signal output to the video switch. (IC704)
Signal level input for the variable attenuation control system.
Connected to ground.
POWER ON/OFF signal output.H=ON,L=OFF
Analog reference voltage.
Power supply.(+5V)
Serial data intput from the display control.
Pin Name
NO USE
CENT-MUTE
REAR-MUT
494-DAT
494-CLK
494-LT
SUR1
SUR2
SUR3
A-TRG
B-TRG
VDD
SOFT TEST
VSS
CAMP-CONT
B-REC FWD
B-REC REW
A-HAFE
B-HAFE
A-PLAY
B-PLAY
AMS-IN
DISPLAY KEY
POWER-KEY
BIAS
PB-A/B
TC-RELAY
PB-MUT
REC-MUT
SP-LATA
SP-LATB
SP-LATC
LINE-MUT
STK-MUT
PROTECT
STB-RELAY
REAR-RELAY
FRONT-RELAY
A-SHUT
B-SHUT
SP/VACS
MODE IN
SPEC-IN
VIDEO SW2
VACS
AVSS
POWER
AV-REF
AVCC
S-IN
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