Samsung ML-4500/XEV Service Manual page 101

Schematic Diagrams
Main Circuit Diagram(3/5)
1
A(0:17)
D(0:15)
A
B
*ROMCS
*RD
*WR
C
D
E
F
1
Samsung Electronics
2 3
U8
A(18)
16 45
D(15)
A18 D15
A(17) 17 43 D(14)
A17 D14
48 41
A(16) D(13)
A16 D13
1 39
A(15) D(12)
A15 D12
2 36
A(14) D(11)
A14 D11
3 34
A(13) D(10)
A13 D10
A(12) 4 32 D(9)
A12 D9
5 30
A(11) D(8)
A11 D8
6 44
A(10) D(7)
A10 D7
7 42
A(9) D(6)
A9 D6
8 40
A(8) D(5)
A8 D5
18 38
A(7) D(4)
A7 D4
19 35
A(6) D(3)
A6 D3
20 33
A(5) D(2)
A5 D2
+5V
21 31
A(4) D(1)
A4 D1
A(3) 22 29 D(0)
A3 D0 *RAS0
23
A(2)
A2 *CAS1
24 37
A(1)
A1 VCC *CAS0
25
A(0) R96
A0
10K
47
_BYTE
9
NC1
C97
10
NC2
100nF
13 46
NC3 VSS1
14 27
NC4 VSS2
26
_CE
GND5
28 15
_OE _BUSY
11 12
_WE _RESET *F_POR
C127 C125 C128
AM29F800B-70EC
100pF 68pF 100pF
GND5 GND5 GND5
+5V
D5
R107
MMSD914T1
10K
+5V
14
1 3 1
U5
KIA7045P
C112 C5
C119 7
22uF
10nF
100nF 2
16V
GND5
GND5
D11
RB420D T147
2 3
4 5
U9
17 2
A(0) D(0)
A0 DQ1
18 3
A(1) D(1)
A1 DQ2
A(2) 19 4 D(2)
A2 DQ3
20 5
A(3) D(3)
A3 DQ4
23 7
A(4) D(4)
A4 DQ5
24 8 D(5)
A(5)
A5 DQ6
25 9
A(6) D(6)
A6 DQ7
A(7) 26 10 D(7)
A7 DQ8
27 33
A(8) D(8)
A8 DQ9
28 34
A(9) D(9)
A9 DQ10
35
D(10)
DQ11
16 36
D(11)
NC1 DQ12
15 38
D(12)
NC2 DQ13
39
D(13)
DQ14
40
D(14)
DQ15
41
D(15)
DQ16
14
RAS*
30
UCAS*
31 1
LCAS* VCC1
13 6
WR* VCC2
29 21
OE* VCC3
C94 C95
R42 R45
68pF 33pF
11 22
100nF 100nF
NC3 GND1
12 37
NC4 GND2
GND5 GND5
32 42
NC5 GND3
KM416C1200BLJ-6
R113
100
*RD
R118
100
*WR
+5V
R26
0
C98
*F_POR
100nF
+5V
GND5
U11-2
U11-1
74F14
R30
74F14
1K
2 4
3
*POR
C45
1nF
GND5
+5V
R79
10K
*WTD_OUT
C35
1nF
GND5
4 5
6 7
U10
17
A(0)
A0
18
A(1)
A1
A(2) 19
A2
20
A(3)
A3
23
A(4)
A4
24
A(5)
A5
25
A(6)
A6
26
A(7)
A7
27
A(8)
A8
28
A(9)
A9
16
NC1
15
NC2
+5V
14
*RAS1 RAS*
30
*CAS1 UCAS*
31
*CAS0 LCAS*
13
WR*
29
OE*
C96
R43 R44
68pF 33pF
11
100nF
NC3
12
NC4
32
NC5
GND5 GND5
KM416C1200BLJ-6
GND5
U13-3
DM7406MX
6
5
LED_DATAI LED_DATA
C31
1nF
U13-4
GND5
DM7406MX
8
9
LED_PAPERI LED_PAPER
C32
1nF
U13-5
DM7406MX
GND5
10
11
LED_ERRORI LED_ERROR
C33
1nF
U13-6
DM7406MX
GND5
12
13
LED_TONERI LED_TONER
C34
1nF
GND5
Engineer:
Drawn by:
R&D CHK:
DOC CTRL CHK:
MFG ENGR CHK:
DATE : 2000.04.14
6 7
8
A
2
D(0)
DQ1
3
D(1)
DQ2
4 D(2)
DQ3
5
D(3)
DQ4
7
D(4)
DQ5
8
D(5)
DQ6
9
D(6)
DQ7
10
D(7)
DQ8
33
D(8)
DQ9
34
D(9)
DQ10
35
D(10)
DQ11
36
D(11)
DQ12
38
D(12)
DQ13
39
D(13)
DQ14
40
D(14)
DQ15
+5V
41
D(15)
DQ16
B
1
VCC1
6
VCC2
21
VCC3
C91 C92 C93
22
GND1
100nF 100nF 100nF
37
GND2
42
GND3
GND5
C
D
E
SAMSUNG
PRINTER DIV
F
APOLLO
Size:
TITLE:
A3
ML-4500
Drawing Number:
REV: 0.2
Page: 3
8
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