Olivetti ECR 7900 Service Manual page 100

1 2
D
D[0..7]
D[0..7]
C
A0
A0
RD#
RD#
LCD_RST#
LCD_RST#
WR#
WR#
LCDCS#
LCDCS#
200000H
CONTROL DATA
200001H
DISPLAY DATA
200002H
IMAGE ADDRESS
3FFFFFH
B
BKL_ON
BKL_ON
A
1 2
94 ECR 7900 Service Manual
3 4
VCC
C46
0.1uF_25V
U5
2 18
D0
A1 B1
3 17
D1
A2 B2
D2 4 16
A3 B3
D3 5 15
A4 B4
1
6 14
D4
A5 B5
0
7 13
D5
A6 B6
8 12
D6
A7 B7
9 11
D7
A8 B8
1
DIR
19
G
74LV245A
VCC
C61
0.1uF_25V
U6
2 18
A1 Y1
3 17
A2 Y2
4 16
A3 Y3
5 15
A4 Y4
6 14
A5 Y5
7 13
A6 Y6
8 12
A7 Y7
9 11
A8 Y8
1
G1
19
G2
74LV541A
TP17
VBL
Q6
VCC
2SA1036K
E C
R115
LCD Back-Light Power (+5V)
10k
R187
2k
B
Q7
DTC143EKA
VCC VCC VCC VCC
+ + + +
3 4
Y108540-8
5
VCC VCC VCC
*
R102
R103 33
R104 33
R105 33
R106 33
R107 33
R108 33
R109 33
33
R110
R111 33
R112 33
R113 33
R114 33
33
VFD_CS0# R120 RD_CS#
VFD_CS0#
VFD_TXD R121 100 RD_DATA
VFD_TXD
VFD_CLK R122 100 RD_CLK
VFD_CLK
100
* mark is unmounted parts.
5
6 7
VCC
LCD Module Interface
VCC
* *
CN3
FB1
1
FB2 SBY321611T-320Y-S
2
LC_C_D# SBY321611T-320Y-S
3
LC_RD#
4
LC_RST#
5
LC_WR#
6
LC_D0
7
LC_D1
8
LC_D2
9
LC_D3
10
LC_D4
11
LC_D5
12
LC_D6
13
LC_D7
14
LC_CE#
15
LC_LEDA R199 0
16
17
18
9x2 Box- Header (2.54mm Pitch)
EC23 EC5 EC22
+ + +
10uF_16V
100uF_16V 10uF_16V
CN13
1
* *
TAB_TERMINAL
VCC VCC
-Vpw VCC
* *
EC6
VF1 VF2
10uF_16V
FB3
Remote Display Interface
R116
1k SBY321611T-320Y-S
CN4
1
2
3
4
5
6
7
* *
8
B8B-PH- K-S
FB4 EC21
SBY321611T-320Y-S 10uF_50V
6 7
8
D
8x2 Box- Header (2.54mm Pitch)
C
B
A
8