Samsung SCX-1100 Service Manual page 101

SCHEMATIC DIAGRAMS
Main Circuit Diagram (4/8)
1
ADDR(1:19)
A
R32
A20
_ROM_CS
_RD
_WR
B
_F_POR
C
D
E
1
Repair Manual
4-4
2
U7 DATA(0:15)
1107-001302
0 ADDR(1:12)
R41
3.3V
_SD_RAS
_SD_CAS
0
C37
A21
100nF
A22
_SCS0
DGND
_WR
_F_POR DQM0
DQM1
R42
0
SCLK
SD_CKE
DGND
U1-3 U2-4
MC74VHC32DR2 74VHC08MX
R9 10K R10 10K
C6
C9
1nF
1nF
DGND DGND
R13 180K
R12
68K
DGND
U2-2
74VHC08MX
DGND
2
3 4
U8 DATA(0:15)
K4S641632D-TC75
C53 C69 C52 C51 C55 C68
100nF 100nF 100nF 100nF 100nF 100nF
DGND
(Unused)
U2-3
74VHC08MX
SD_CKE
C8 C10
100pF 100pF
DGND
3.3V VB
VB2
D2
Q2
MMSD914T1
KSA1182-Y
R22 0 R21 200
R17 1.5K (UNUSED)
Q8
2SC2812L6-TA
R16
200
C31 C30
16V 16V
5.5V,5V
10uF 10uF
DGND
(Unused)
3 4
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5 6
U9
ADDR(1:11) K4S161622D-TC70
VB
DQM0
DQM1
3VB
_WR
_SD_CAS
_SD_RAS
_SCS1
A20
C45
100nF
C57
100nF C42 C44
100nF 100nF
DGND DGND
3.3V 3.3V
C4
C18
100nF 100nF
DGND DGND
U3-1
U1-1
74VHC27
MC74VHC32DR2
DGND
DGND
_SRAS
U1-2
_SCAS
MC74VHC32DR2
VB
C5
100nF
CHX
DGND
R371 U2-1
100K
74VHC08MX
DGND
DGND
CHY
U1-4
MC74VHC32DR2
ED. 1 01.08.06
DATE
SIGN
C
A
H
R
E
P
C
.
K
REF NO SEC
5 6
7
DATA(0:15)
A
3VB 3.3V
R40
0
SD_CKE
SCLK
C54 C56 C43
100nF 100nF 100nF
B
_SD_RAS
C
_SD_CAS
D
CHXX
CHYY
E
2 3
E D
SCX-1100
N W
G G Main Board
. .
REV 0.2
MEMORY
4/8
Samsung Electronics