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WX-7700MDX
27
27
5-4.
BLOCK DIAGRAM – DISPLAY/BUS CONTROL Section –
SP SI
SP CLK
BACK UP +5V
Q632
BUS ON/OFF
SWITCH
Q632
D631
PULL UP +5V
S641
S640
LSW801,
LSW803 – 813,
S820, 821
FRONT PANEL
OPEN/CLOSE MOTOR DRIVE
IC641
SW800
(RESET)
BACK UP +5V
BATT B+
75
100
99
40 98 97
96
6
81
FP DA
TA
MD DA
TA
30
101
MUTE
46
47
79
REFERENCE
VOLTAGE SWITCH
Q640, 641
BACK UP +5V
DATA
CLK
BUS-ON
BU CHECK
KEY ACTIVE
SWITCH
Q551
DATA
FP DATA
MD DATA
CLK
BUS-ON
BU CHECK
DATA
CLK
BU CHECK
BUS-ON
D638
BATT B+
D713
D639
D640
D551
D550
M
M640
FRONT PANEL
OPEN/CLOSE
S640
FRONT PANEL
OPEN DETECT
S641
FRONT PANEL
CLOSE DETECT
DATA
5
BUS ON
6
CLK
4
TH630
SONY BUS INTERFACE
IC630
(FOR SONY BUS)
BUS CONTROL IN
CN630
RESET
BATT
7
2
BATT B+
D714
D635
BATT B+
BATTERY CHECK
Q631
3
4
X660
4MHz
SIRCS
CONTROLLER
IC660
D637
D636
92
93
74
73
X550
32.768kHz
X551
3.6864MHz
D301
ILLON
BUS ON
LIQUID CRYSTAL
DISPLAY
LCD740
1-12, 18, 45, 51-53, 62-78,
82-87, 91-101, 110-132
100
54-61
13-17, 19-25, 46-50,
79-81, 88-90
OSC
C746, R751
DATA
CLK
CE1
INH
DATA
CLK
CE0
CE1
INH
OSC
C740, R742
DATA
CLK
CE0
INH
LIQUID CRYSTAL
DISPLAY
LCD741
1-8
133-140
LIQUID CRYSTAL
DISPLAY DRIVER
IC741
LIQUID CRYSTAL
DISPLAY DRIVER
IC740
53-80, 105-140
105
106
R-CH
PEAK HOLD
RESET SWITCH
Q790
B+ SWITCH
Q792
BACK UP +5V
120
121
122
LED749 – 758
(LCD BACK LIGHT)
X701
18.432MHz
SP SI,
SP CLK
FL
SIRCS B+
SIRCS B+
1 – 15, 17 – 56,
LED DRIVE
(COLOR SWITCHING)
Q747 – 749