Sony XES-Z50 Service Manual page 78

XES-Z50
Q Q
3 7 6 3 1 5 1 5 0
7-4. BLOCK DIAGRAM – CONTROL UNIT (DISPLAY Section)
T E
L 1 3 9 4 2 2 9 6 5 1 3
ADDRESS BUS
DATA BUS
S-RAM FLASH MEMORY
IC805 IC804
11
WE
OE 28
CE 26
WE 17
41
OE
w w w
39
LB
UB 40
6
CE
05
.
DISPLAY CONTROLLER
IC802 (1/2)
LCD-RX 14
D0 – D15
DATA
LCD-TX 12
4
DSPL-RST
RST
A1 – A18
DSPL-ON 5
BZ811
(BUZZER)
96 DEC-CLR
89
DEC-CS
90
DEC-INT
72 LWR
GATE SWITCH
IC807 (1/3)
71 HWR
LB
GATE SWITCH
IC807 (2/3)
UB
GATE SWITCH
IC807 (3/3)
70 RD
56 A19
GATE SWITCH
IC803
91
ROM-CS
88 SRAM-CS
EXTAL XTAL
66 67
X802
14.745MHz
x a o
y
i
B
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8
DISPLAY CONTROLLER
IC901
LEVEL SHIFT BUFFER
12 TX-LCD
IC942 (1/2)
IC509
DATA
DATA
14 RX-LCD
LEVEL SHIFT
TRANSCEIVER
IC941 63 RES
IC507
RST
A0
36
66 EXTAL
X901
14.745MHz
67 XTAL
BUZZER DRIVE
BEEP
97
Q811
SWITCHING
LCD-BUSY 9
IC951 (1/2)
2
TIR
LCD-START 8
72
LWR
GATE SWITCH
IC921 (1/3) LCD RST 95
71 HWR
DIMER 85
LB
GATE SWITCH
IC921 (2/3)
CONTR
84
UB
GATE SWITCH
LCD-CS 99
IC921 (3/3)
SWITCHING
IC951 (2/2)
70 RD
Q Q
3 7 6 3
90 ROM-CS
88
SRAM-CS
ADDRESS BUS ADDRESS BUS
DATA BUS DATA BUS
S-RAM FLASH MEMORY
IC932 IC931
39 LB
40 UB
6 CE
41 OE
17 WE
26 CE
u 1 6 3
28 OE
11 WE
.
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9 2 4 9
LIQUID CRYSTAL
DISPLAY MODULE
SIRCS
SIRCS C (Page 81)
D0 – D15 D8 – D15
LCD-DAT 0
LCD-DAT 7
LCD-CONT
A1 – A19
LCD-BUSY
DIMER
CONTR
KEY-
RV801
CONT
KEY-CONT D (Page 81)
CONTRAST
LCD-LAT
1 5 1 5 0 8 9 2
m
c o
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