Sony HCD-GTX66 / HCD-GTX77 / HCD-GTX77BP / MHC-GTX66 / MHC-GTX77 / MHC-GTX77BP Service Manual ▷ View online
73
HCD-GTX66/GTX77/GTX77BP
Pin No.
Pin Name
I/O
Pin Description
85
PF1/RXD0
O
Serial data signal output
86
PF2/SCLK0/CTS0/
O
Serial data transfer clock signal output
CLK/TB0OUT0
87
PF3/TXD1/SPDO
O
Serial data signal output to the system controller
88
PF4/RXD1/SPDI
I
Serial data signal input from the system controller
89
PF5/SCLK1/CTS1/SPCLK
O
Not used in this set. (Open)
90
PN1/SDA0/TA3OUT/SO0
I/O
Two-way EEPROM IIC data bus Not used in this set.
91
PN2/SCL0/TA2IN/SI0
I/O
Two-way EEPROM IIC clock bus Not used in this set.
92
PN3/HCLK
O
Bit clock signal output to the CD-MP3 processor
93
PN4/HSSO/SDA1
O
Audio data output to the CD-MP3 processor
94
PN5/HSSI/SCL1
O
Gate signal output to the CD-MP3 processor
95
DVCC3A
—
Power supply pin (+3.3 V)
96
PG
I
Request signal input from the CD-MP3 processor
97
PG
I
Request signal input from the CD-MP3 processor
98, 99
PG1, PG0
I
Function selection signal input Fixed at “L” in this set.
100
DVSS
—
Ground pin
74
HCD-GTX66/GTX77/GTX77BP
IC900 MB90M407PF-G-151E1 (DISPLAY CONTROL, KEY CONTROL) (PANEL BOARD)
Pin No.
Pin Name
I/O
Pin Description
1 to 8
G16 to G23
O
Grid drive signal output to the vacuum fluorescent display
9, 10
P35, P36
O
Segment drive signal output to the vacuum fluorescent display
11
VSS-IO
—
Ground pin (for I/O port)
12 to 22
P34 to P24
O
Segment drive signal output to the vacuum fluorescent display
23
VDD-FIP
—
Power supply pin (+3.3 V) (for vacuum fluorescent display)
24 to 41
P23 to P6
O
Segment drive signal output to the vacuum fluorescent display
42
VSS-IO
—
Ground pin (for I/O port)
43 to 47
P5 to P1
O
Segment drive signal output to the vacuum fluorescent display
48
VKK
—
Power supply pin (–33 V) (for vacuum fluorescent display)
49 to 51
MD0 to MD2
I
Setting pin for the CPU operational mode
52
LED-VIDEO, USB
O
Dynamic LED drive signal output of the VIDEO and USB indicator (“H”: LED on)
53
LED-TAPE, AUDIO
O
Dynamic LED drive signal output of the TAPE and AUDIO indicator (“H”: LED on)
54
LED-CD, TUNER
O
Dynamic LED drive signal output of the CD and TUNER indicator (“H”: LED on)
55
LED-VOL1, 2
O
Dynamic LED drive signal output of the (VOL1) and (VOL2) indicator (“H”: LED on)
56
LED-VOL3, 4
O
Dynamic LED drive signal output of the VOL3 1st and VOL4 indicator (“H”: LED on)
57
LED-VOL5, 6
O
Dynamic LED drive signal output of the VOL5 3rd and VOL6 indicator (“H”: LED on)
58
LED-FF, FR
O
Dynamic LED drive signal output of the FF and FR indicator (“H”: LED on)
59
LED-REC/ERASE,
O
Dynamic LED drive signal output of the REC/ERASE and CD-USB SYNC/REC 1
CD-USB SYNC/REC 1
(“H”: LED on)
60
12C-DATA
I/O
Clock signal for IIC communication between Master Control controller and Display
Control controller
61
12C-CLOCK
I/O
Data signal for IIC communication between Master Control controller and Display
Control controller
62
AVCC
—
Power supply pin (+3.3 V) (for A/D conversion)
63
AVSS
—
Ground pin (for A/D conversion)
64 to 66
KEY0 to KEY2
I
Key input (A/D input)
67
ALL-BAND
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter
(A/D input)
68 to 71
BPF4 to BPF1
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter
(A/D input)
72
ORERATION DIAL
I
Jog dial pulse input from ORERATION DIAL encoder
73
VOLUME
I
Jog dial pulse input from the VOLUME encoder
74
NO USE
—
Not used. (GND)
75
LED-STOP
O
Dynamic LED drive signal output of the STOP indicator (“H”: LED on)
76
LED-CD-TAPE SYNC,
O
Dynamic LED drive signal output of the CD-TAPE SYNC and TAPE REC PAUSE/
TAPE REC PAUSE/START
START indicator (“H”: LED on)
77
RESET
I
System reset signal input from the Master Control controller (“L”: reset)
78
LED-AMS +, AMS –
O
Dynamic LED drive signal output of AMS + and AMS – indicator (“H”: LED on)
Not used in this set.
79
LED-PLAY
O
Dynamic LED drive signal output of PLAY and PAUSE indicator (“H”: LED on)
80
LED selector
O
Dynamic LED drive select signal output
81
VSS-CPU
—
Ground pin (for CPU)
82
XO
O
System clock output (4 MHz)
83
XI
I
System clock input (4 MHz)
84
VCC-CPU
—
Power supply pin (+3.3 V) (for CPU)
85
NO USE
—
Not used. (GND)
86 to 100
G1 to 15
O
Grid drive signal output to the vacuum fluorescent display
75
HCD-GTX66/GTX77/GTX77BP
SECTION 7
EXPLODED VIEWS
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Accessories are given in the last of this
parts list.
• Abbreviation
AR : Argentina model
E2
E2
: 120V AC area in E model
E51 : Chilean and Peruvian model
MX : Mexican model
MX : Mexican model
Ref. No.
Part No.
Description
Remark
7-1. MAIN SECTION
Ref. No.
Part No.
Description
Remark
1
1-823-718-11 WIRE (FLAT TYPE) (17 CORE)
2
A-1249-256-A EFFECTOR BOARD, COMPLETE
3
3-363-099-32 SCREW (CASE 3 TP2)
4
3-363-099-02 SCREW (CASE 3 TP2)
5
3-703-136-12 SCREW, TAPPING
6
3-077-331-21 +BV 3 (3-CR)
7
2-895-478-22 PANEL, LOADING (GTX77/GTX77BP)
7
2-895-478-32 PANEL, LOADING (GTX66)
8
2-342-117-31 CASE (TOP)
9
1-828-956-11 WIRE (FLAT TYPE) (9 CORE)
10
3-378-109-12 CUSHION, SARANET
0 11
1-468-737-51 SWITCHING, POWER
M891
1-763-372-11 FAN, DC
TU901
1-693-734-11 TUNER (FM/AM) (ANTENNA)
#1
7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
#2
7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
#3
7-685-648-79 SCREW +BVTP 3X12 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.
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
M891
#1
#1
#1
#1
#1
#2
#2
#2
#2
#1
#1
#1
#1
#1
#3
#3
#2
not supplied
not supplied
not supplied
not supplied
not supplied
(PRIMARY board)
(PRIMARY board)
front panel section (1)
chassis section
CD block section
TU901
7
8
9
5
6
10
11
5
1
2
3
4
4
3
#2
Ver. 1.1
76
HCD-GTX66/GTX77/GTX77BP
7-2. FRONT PANEL SECTION (1)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
1-828-964-11 WIRE (FLAT TYPE) (11 CORE)
52
3-087-053-01 +BVTP 2.6 (3CR)
53
1-417-656-11 DECK, MECHA
54
A-1249-247-A MIC BOARD, COMPLETE
55
2-895-507-01 KNOB (MIC)
56
A-1249-249-A USB CONNECTOR BOARD, COMPLETE
not supplied
front panel section (2)
52
56
52
52
55
52
52
52
53
54
51
Ver. 1.1
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