Sony WX-7700MDX Service Manual ▷ View online
77
WX-7700MDX
Pin No.
Pin Name
I/O
Description
71 to 78
NCO
O
Not used
79
FL W
O
Control signal output terminal when writing into internal flash memory data Not used
80
FWE
I
Enable signal input terminal when writing into internal flash memory data Not used
81
RES
I
System reset signal input from the master controller, reset signal generator and reset switch
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
82
NMI
I
Non maskable interrupt input terminal
Connect to the back-up power supply detection circuit (BU IN (pin ef) ) in this set
Connect to the back-up power supply detection circuit (BU IN (pin ef) ) in this set
83
STBY
I
Hard ware standby signal input terminal
“L”: hard ware standby mode (fixed at “H” in this set)
“L”: hard ware standby mode (fixed at “H” in this set)
84
VCC
—
Power supply terminal (+5V)
85
XTAL
O
System clock output terminal (18.432 MHz)
86
EXTAL
I
System clock input terminal (18.432 MHz)
87
VSS
—
Ground terminal
88
NCO
O
Not used
89
VCC
—
Power supply terminal (+5V)
90 to 96
NCO
O
Not used
97
UNISO
O
Serial data output to the SONY bus interface IC
98
UNISI
I
Serial data input from the SONY bus interface IC
99, 100
VSS
—
Ground terminal
101
UNICKI
I
Serial clock signal input for the bus interface from the master controller
102
NCO
O
Not used
103
AVCC
—
Power supply terminal (+5V) (for the A/D converter and D/A converter)
104
VREF
I
Reference voltage (+5V) input terminal (for the A/D converter and D/A converter)
105
LVL L
I
Analog signal input for front side (L-ch side) from the CXD2727Q
106
LVL R
I
Analog signal input for front side (R-ch side) from the CXD2727Q
107 to 112
NIL
I
Not used
113
AVSS
—
Ground terminal (for the A/D converter and D/A converter)
114
VSS
—
Ground terminal
115 to 118
NCO
O
Not used
119
PWM CYCLE
O
PWM synchronizing generation output terminal Not used
120 to 122
PWM B,
PWM G,
PWM R
O
LCD back light LED drive signal output terminal
Color switching by RGB composition
Color switching by RGB composition
123 to 125
MD0 to MD2
I
Setting terminal for the CPU operational mode
126 to 128
NCO
O
Not used
78
WX-7700MDX
6-1. MAIN SECTION
SECTION 6
EXPLODED VIEWS
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
delay should be anticipated when ordering
these items.
• Accessories are given in the last of the elec-
trical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
3-037-885-02 ROLLER (GUIDE)
2
3-037-891-01 SPRING (GUIDE)
3
3-037-890-01 SPRING (FULCRUM: R), TORSION
4
3-037-889-01 SPRING (FULCRUM: L), TORSION
5
3-023-449-21 COVER (FLEXIBLE)
6
3-037-878-01 SCREW, ORNAMENTAL
7
3-236-431-01 PANEL (L), GUIDE
8
4-356-741-31 SCREW, TAPPING (BIND 2X8)
9
3-233-365-01 COVER
10
3-236-432-01 PANEL (R), GUIDE
11
1-790-926-21 CORD (WITH CONNECTOR) (POWER)
* 12
3-040-641-01 SHEET (FLEXIBLE), PROTECTION
13
3-245-717-01 SLEEVE (PANEL)
F1
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A/32V)
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
9
8
7
#1
6
12
13
13
1
2
3
front panel section
sub panel
sub assy section
sub assy section
4
11
6
8
#1
chassis (B)
assy section
assy section
chassis (T)
assy section
assy section
F1
2
1
5
10
#1
The components identified by
mark 0 or dotted line with mark
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Replace only with part number
specified.
79
WX-7700MDX
6-2. SUB PANEL SUB ASSY SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
X-3380-866-2 PANEL SUB ASSY, SUB
* 52
X-3377-968-1 ESCUTCHEON (MD) ASSY
53
3-025-484-01 SPRING (DOOR)
54
3-038-395-01 SCREW (2X4), +P TIGHT
55
A-3274-514-A SUB BOARD, COMPLETE
* 56
3-230-714-01 SHEET (PHOTO)
57
3-233-356-01 BUTTON (EJECT) (Z MD. Z CD)
57
56
55
54
51
53
52
54
not supplied
80
WX-7700MDX
6-3. FRONT PANEL SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
* 101
X-3377-682-1 BRACKET (L) ASSY
102
3-037-855-41 PANEL, FRONT BACK
103
4-356-741-31 SCREW, TAPPING (BIND 2X8)
* 104
X-3377-683-1 BRACKET (R) ASSY
105
1-823-602-21 CABLE, FLEXIBLE FLAT 7P
#2
7-621-772-10 SCREW +B 2X4
#3
7-685-103-19 SCREW +P 2X5 TYPE2 NON-SLIT
#2
#2
#3
103
102
104
103
101
105
display board section
front panel sub section
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