Service manual

FO-DC550 CIRCUIT DIAGRAM 14 - 16
C269
0.1U
5 33J
C270
0.1U
C257
0.1U
L10
ZJSR5101-102TA
R238
4.7KJ
C280
0.1U
IC39
K4S561632D
VSS
54
RAS
18
WE
16
CAS
17
VSS
41
VSS
28
VDD
1
VDD
14
VDD
27
BA0
20
BA1
21
A0
23
A1
24
A2
25
A3
26
A4
29
A5
30
A6
31
A7
32
A8
33
A9
34
A10
22
A11
35
VDDQ
3
VDDQ
9
VDDQ
43
VDDQ
49
VSSQ
6
VSSQ
12
VSSQ
46
VSSQ
52
DQ0
2
DQ1
4
DQ2
5
DQ3
7
DQ4
8
DQ5
10
DQ6
11
DQ7
13
DQ8
42
DQ9
44
DQ10
45
DQ11
47
DQ12
48
DQ13
50
DQ14
51
DQ15
53
LDQM
15
UDQM
39
CS
19
CLK
38
CKE
37
A12
36
N.C
40
BR115 10kJX4
1
2
3
45
6
7
8
C332
0.1U
C299
0.1U
C333
0.1U
C279
0.1U
C334
0.1U
C401
N.M.
C268
0.1U
C278
0.1U
C281
0.1U
R327 0J
C298
0.1U
6 4.7KJ
C272
47U/16V
+
C265
47p
R217
0J
C264
NM
C271
0.1U
R329
10kJ
C297
0.1U
C290
0.1U
R330 0J
IC38
GND
27
GND
46
VCC
37
IO0
29
IO1
31
IO2
33
IO3
35
IO4
38
IO5
40
IO6
42
IO7
44
IO8
30
IO9
32
IO10
34
IO11
36
IO12
39
IO13
41
IO14
43
IO15/A-1
45
A0
25
A1
24
A2
23
A3
22
A4
21
A5
20
A6
19
A7
18
A8
8
A9
7
A10
6
A11
5
A12
4
A13
3
A14
2
A15
1
A16
48
A17
17
A18
16
VCCW
13
WE
11
RESET
12
BYTE
47
CE
26
OE
28
RY/BY
15
A19
9
A20
10
WP/ACC
14
C289
0.1U
BR116 10kJX4
1
2
3
45
6
7
8
C256
NM
BR117 10kJX4
1
2
3
45
6
7
8
C288
0.1U
R328 0J
BR118 10kJX4
1
2
3
45
6
7
8
_SDRAM_CLK
_
DQMA0
_SDRAM_CKE
_SDRAM_DQMB1
_SDRAM_DQMB0
ROM_CS_L
_
DQMB1
SDRAM_RAS_L
SDRAM_CAS_L
SDRAM_CAS_L
ROM_CS_L
_
DQMA1
_SDRAM_DQMA1
_
DQMB0
SDRAM_WE_L
_SDRAM_DQMA0
SDRAM_BANK0
SDRAM_BANK1
M
_CS0_L
SDRAM_RAS_L
SDRAM_WE_L
SDRAM_RAS_L
SDRAM_CAS_L
_SDRAM_CLK
SDRAM_BANK0
_SDRAM_DQMA0
SDRAM_BANK1
_SDRAM_CS0_L
SDRAM_WE_L
_SDRAM_CKE
T
_SDRAM_DATA7
_
DATA6
_SDRAM_DATA2
_
DATA12
_SDRAM_DATA8
_
DATA8
_SDRAM_DATA1
_
DATA5
_
DATA11
_SDRAM_DATA0
_
DATA10
_
DATA13
_
DATA2
_
DATA14
_SDRAM_DATA7
_
DATA9
M
_DATA0
_
DATA7
_
DATA4
_SDRAM_DATA3
_SDRAM_DATA4
_SDRAM_DATA5
_
DATA3
_SDRAM_DATA5
_SDRAM_DATA9
_SDRAM_DATA6
_SDRAM_DATA3
_SDRAM_DATA4
_SDRAM_DATA1
_SDRAM_DATA6
_
DATA1
_SDRAM_DATA2
_SDRAM_DATA0
_
DATA15
RY_BY
SDRAM_ADDR12
SDRAM_ADDR6
SDRAM_ADDR0
SDRAM_ADDR9
SDRAM_ADDR2
SDRAM_ADDR4
SDRAM_ADDR0
SDRAM_ADDR10
SDRAM_ADDR1
SDRAM_ADDR2
SDRAM_ADDR9
SDRAM_ADDR11
SDRAM_ADDR7
SDRAM_ADDR5
SDRAM_ADDR12
SDRAM_ADDR4
SDRAM_ADDR5
SDRAM_ADDR3
SDRAM_ADDR6
SDRAM_ADDR11
SDRAM_ADDR3
SDRAM_ADDR7
SDRAM_ADDR8
SDRAM_ADDR8
SDRAM_ADDR10
SDRAM_ADDR1
_SDRAM_CKE
_SDRAM_CS0_L
_SDRAM_DATA8
_SDRAM_DATA9
_SDRAM_DATA10
_SDRAM_DATA11
_SDRAM_DATA12
_SDRAM_DATA13
_SDRAM_DATA14
_SDRAM_DATA15
_SDRAM_DQMA1
_SDRAM_DATA0
_SDRAM_DATA1
_SDRAM_DATA2
_SDRAM_DATA3
_SDRAM_DATA4
_SDRAM_DATA5
_SDRAM_DATA6
_SDRAM_DATA7
_SDRAM_DATA8
_SDRAM_DATA9
_SDRAM_DATA10
_SDRAM_DATA11
_SDRAM_DATA12
_SDRAM_DATA13
_SDRAM_DATA14
_SDRAM_DATA15
VCC3
VCC3
VCC3
VCC3OA3.3V
VCC3
VCC3
VCC3
_SDRAM_CLK
_SDRAM_CLK
SDRAM_BANK[1:0]
_SDRAM_DATA[15:0]
SDRAM_BANK[1:0]
_SDRAM_DATA[15:0]
SDRAM_ADDR[12:0]
_SDRAM_DATA[15:0]
SDRAM_BANK[1:0]
SDRAM_ADDR[12:0]
SDRAM_ADDR[12:0]
SDRAM_ADDR[12:0]
/RESET0
_SDRAM_DATA[15:0]
Model
E-Sort Model
FAX Model
Vendor/Type
4Mbit
16Mbit
LH28F160BJE-BTL90
LH28F400BVE-BL85
Flash ROM
Flash ROM
(8-D4) (8-E4) (8-E3)
(8-E4)(8-D2)(8-D3)(8-C3)
(8-E3)(8-E4)(8-C4)
(8-D2)(8-C3)
(8-C4) (8-D4) (8-E3)
(8-C3) (8-D3) (8-D4)
(8-E4) (8-D3)
(8-D4) (8-D2) (8-D1)
(8-D2)
(8-D4)(8-E4)(8-C3)
(8-D4)(8-C3)
(8-C3)
(8-C4) (8-D4) (8-E4)
LH28F800BJE-PBTL908Mbit
(US)
FAX Model
(except US)
R327/R328/R330 ; 0J
R327/R328/R330 ; OPEN
R327/R328/R330 ; OPEN
(8-D4)
C
C
D
D
E
E
4
3
2
1
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