Sony HCD-GX450 (serv.man2) Service Manual ▷ View online
45
HCD-GX450
Pin No.
Pin Name
I/O
Description
42
O-MP3-STB
O
Standby signal output to the MP3 decoder
43
I-MP3-REQ
I
Data send request signal input from the MP3 decoder
44
O-MP3-LP
O
Latch pulse signal output to the MP3 decoder
45
O-XLT
O
Latch pulse signal output to the CD DSP
46
xWR
I/O
Connected to +3.3V
47
O-XRST
O
System reset signal output to the CD DSP and motor/coil driver
48, 49
O-LM-R,
O-LM-F
O
Loading motor control signal output terminal
50, 51
O-TM-R,
O-TM-F
O
Table motor control signal output terminal
52 to 54
I-E-1 to I-E-3
I
Disc tray address sensor (rotary encoder) input terminal
55
I-CD NUMBER
SENS
I
Table address sensor input terminal
56
I-OPEN-SW
I
Disc tray open/close detection switch input terminal
57
O-CDG-MUTE-
DATA
O
Muting control signal output to the CD graphics decoder (not used)
58
O-CDG-RST
O
System reset signal output to the CD graphics decoder (not used)
59
O-CDG-BGC
O
NTSC/PAL switching control signal output terminal (not used)
60
I-CDG-DET
I
CD-G detection signal input terminal (not used)
61
O-CDG-POWER
O
Power on/off control signal output for CD-G section (not used)
62
VCC2
-
Power supply terminal (+3.3V)
63
O-VMUTE
O
Video muting on/off control signal output terminal (not used)
64
VSS
-
Ground terminal
65
O-LC72121-CLK
O
Serial data transfer clock signal output to the FM/AM tuner pack
66
I-LC72121-DI
I
Serial data input from the FM/AM tuner pack
67
O-LC72121-DO
O
Serial data output to the FM/AM tuner pack
68
O-LC72121-CE
O
Chip enable signal output to the FM/AM tuner pack
69
I-TUNED
I
Tuning detection signal input from the FM/AM tuner pack
70
I-STEREO
I
FM stereo detection signal input from the FM/AM tuner pack
71
O-ST-MUTE
O
Muting on/off control signal output to the FM/AM tuner pack
72
I-RDS-DATA
I
RDS data input from the terminal (not used)
73
O-MODEL1
O
Setting terminal for the destination and model type
74
I-KEY0
I
Front panel key input terminal (A/D input)
75 to 80
O-MODEL2 to
O-MODEL7
O
Setting terminal for the destination and model type (not used)
81
I-HP/AUDIO IN
I
Headphone plug and audio in plug insert detection signal input
82
I-MIC
I
MIC plug insert detection signal input terminal (connected to ground)
83
I-REAL-A
I
Deck-A tape reel rotating detection signal input terminal
84
I-REAL-B
I
Deck-B tape reel rotating detection signal input terminal
85
O-MOTOR
O
Capstan/reel motor drive signal output terminal
86
O-A-SOL
O
Deck-A plunger drive signal output terminal
87
O-B-SOL
O
Deck-B plunger drive signal output terminal
88
I-TAPE-A-STAT
I
Deck-A cassette detection signal, deck-A mode detection signal and recording (reverse
direction) detection signal input terminal (A/D input)
direction) detection signal input terminal (A/D input)
89
I-TAPE-B-STAT
I
Deck-B cassette detection signal, deck-B mode detection signal and recording (forward
direction) detection signal input terminal (A/D input)
direction) detection signal input terminal (A/D input)
90
O-REC/PB
O
REC/PB switching control signal output terminal
91
O-BIAS
O
REC bias on/off control signal output terminal
46
HCD-GX450
Pin No.
Pin Name
I/O
Description
92
I-TAPE-AMS
I
Auto music sensor detection signal input from the electrical volume
"L": music is present, "H": music is not present
"L": music is present, "H": music is not present
93
I-STREAM
I
Audio signal input for stream LED (A/D input)
94
I-VACS
I
VACS signal input terminal (A/D input)
95
I-PROTECTOR
I
Protector operating detection signal input terminal
96
AVSS
-
Ground terminal
97
I-POWER,
DISPLAY
I
Front panel key input terminal (A/D input)
98
VREF
I
Reference voltage input terminal (connected to +3.3V)
99
AVCC
-
Power supply terminal (+3.3V)
100
NC
O
Not used
47
HCD-GX450
PANEL BOARD IC701
µ
PD780232GC-508-8BT-A (FL/LED DRIVER)
Pin No.
Pin Name
I/O
Description
1
VDD1
-
Power supply terminal (+3.3V)
2
VSS1
-
Ground terminal
3
X1
I
System clock input terminal (4.19 MHz)
4
X2
O
System clock output terminal (4.19 MHz)
5
IC
I
Not used
6
RESET
I
System reset signal input from the system controller "L": reset
7
SCK1
I
Serial data transfer clock signal input from the system controller
8
SI1
I
Serial data input from the system controller
9
SO1
O
Serial data output to the system controller
10 to 15
NC
I
Not used
16
CE
I
Chip select signal input from the system controller
17
NC
I
Not used
18
AVSS
-
Ground terminal
19 to 22
KEY1 to KEY4
I
Front panel key input terminal (A/D input)
23
VSS0
-
Ground terminal
24
AVDD
-
Power supply terminal (+5V)
25
VDD0
-
Power supply terminal (+5V)
26 to 31
STREAM LED1 to
STREAM LED6
O
LED drive signal output terminal
32
SW LED
O
LED drive signal output terminal
33 to 44
NC
I
Not used
45 to 58
S1 to S14
O
Segment drive signal output to the fluorescent indicator tube
59
VDD2
-
Power supply terminal (+5V)
60
VLOD
-
Power supply terminal (for fluorescent indicator tube drive)
61 to 67
S15 to S21
O
Segment drive signal output to the fluorescent indicator tube
68 to 80
G1 to G13
O
Grid drive signal output to the fluorescent indicator tube
48
HCD-GX450
SECTION 5
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.
Ref. No.
Part No.
Description
Remark
1
3-363-099-32 SCREW (CASE 3 TP2)
2
4-245-183-61 CASE (SIDE-L) (US)
2
4-245-183-71 CASE (SIDE-L) (CND)
3
4-252-196-21 DOOR, CD
4
3-038-018-01 EMBLEM, SONY
5
4-244-849-61 CASE (TOP) (US)
5
4-244-849-71 CASE (TOP) (CND)
7
1-787-319-11 FAN, DC
Ref. No.
Part No.
Description
Remark
•
The mechanical parts with no reference number
in the exploded views are not supplied.
in the exploded views are not supplied.
•
Abbreviation
CND
CND
: Canadian model.
8
1-828-963-11 WIRE (FLAT TYPE) (11 CORE)
9
1-693-631-31 TUNER (FM/AM)
10
4-245-184-61 CASE (SIDE-R) (US)
10
4-245-184-71 CASE (SIDE-R) (CND)
11
1-828-970-11 WIRE (FLAT TYPE) (13 CORE)
#1
7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
#2
7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
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.
Les composants identifiés par une marque 0
sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant le
numéro spécifié.
sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant le
numéro spécifié.
5-1.
MAIN SECTION
CD mechanism deck
section-1
section-1
#1
#1
#2
#1
#1
#1
#1
#1
#1
#1
#1
#1
#1
#1
#1
#1
a
a
#2
3
2
10
1
1
1
1
5
front panel
section
section
Main board section
4
not
supplied
7
11
8
9
not
supplied
not
supplied
not
supplied
#2
not
supplied
not
supplied
b
b
PT902
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