Acer Extensa 900 Maintenance Manual
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Notebook Schematic Diagrams A-5 Figure A-1 Notebook Main Board Logic Diagrams (Sheet 4 of 30)
A-6 Notebook Schematic Diagrams Figure A-1 Notebook Main Board Logic Diagrams (Sheet 5 of 30)
Notebook Schematic Diagrams A-7 Figure A-1 Notebook Main Board Logic Diagrams (Sheet 6 of 30)
A-8 Notebook Schematic Diagrams Figure A-1 Notebook Main Board Logic Diagrams (Sheet 7 of 30) $MD32 $MD33 $MD34 $MD35 $MD36 $MD37 $MD38 $MD39 $CAS#4 $CAS#5 2 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 101 103 105 107 109 111 113 115 117 119 121 123 125 127 129 131 133 135 137 139 141 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 143 146 145 CN12 SDIMM144 $MA[0..11]$MD[0..63] $MD0 $MD1 $MD2 $MD3 $MD4 $MD5 $MD6 $MD7 $CAS#0 $CAS#1 $MD[0..63] DRAM_VCCDIMM SOCKET 2,6 2 2 2 $RAS#2$RAS#3$MWE#$MD8 $MD9 $MD10 $MD11 $MD12 $MD13 $MD14 $MD15 $MA0 $MA1 $MA2 9 1 2 R202 100KR3 DIMM_IN# $MD40 $MD41 $MD42 $MD43 $MD44 $MD45 $MD46 $MD47 $MA3 $MA4 $MA5 M+5V 23 19MOS_ON# ID_CLK 9 81 4 1 0 7 U51C SOLCX125M 1 2R154 100KR3 $MD48 $MD49 $MD50 $MD51 $MD52 $MD53 $MD54 $MD55 $MD56 $MD57 $MD58 $MD59 $MD60 $MD61 $MD62 $MD63 $MA7 $MA11 $CAS#6 $CAS#7M+3.3V M+3.3V 1 2R81 2KR3 $MD16 $MD17 $MD18 $MD19 $MD20 $MD21 $MD22 $MD23 $MD24 $MD25 $MD26 $MD27 $MD28 $MD29 $MD30 $MD31 $MA6 $MA8 $MA9 $MA10 $CAS#2 $CAS#319DIMM_DATA 2 C166 SCD1U C167 SCD1U C168 SCD1U C169 SCD1U C172 SCD1U C179 SCD1U C171 SC10U16V 1 2 R82 3K3R3 $CAS#[0..7]$CAS#[0..7] DRAM_VCC C180 SCD1U C176 SCD1U C177 SCD1U C178 SCD1U DRAM_VCC
Notebook Schematic Diagrams A-9 Figure A-1 Notebook Main Board Logic Diagrams (Sheet 8 of 30)
A-10 Notebook Schematic Diagrams Figure A-1 Notebook Main Board Logic Diagrams (Sheet 9 of 30)
Notebook Schematic Diagrams A-11 Figure A-1 Notebook Main Board Logic Diagrams (Sheet 10 of 30)
A-12 Notebook Schematic Diagrams Figure A-1 Motherboard PWB Logic Diagrams (Sheet 11 of 23 )
Notebook Schematic Diagrams A-13 Figure A-1 Notebook Main Board Logic Diagrams (Sheet 12 of 30)
A-14 Notebook Schematic Diagrams
Figure A-1 Notebook Main Board Logic Diagrams (Sheet 13 of 30)
4,14,15,17,19,20,25
20,23
1
2
R101
DUMMY-R3
SD[0..7]
@IRQ8# IRQ#8SD7
SD1 SD2 SD3 SD4 SD5 SD6
SD0SD[0..7]
U40 PIN 22
4 23
19
19VCC 24
CS$ 13
AS 14R/W$ 15
DS 17RST$ 18RCL$ 21
EXTRAM 22
BC 20
X1 2
X2 3AD711
AD610
AD59
AD48
AD37
AD26
AD15
AD04INT$19
SQW23
MOT1
VSS12
VSS16
U40
BQ3285E
1
2R105
10KR3
2 1
G1
GAP-OPEN
1 2RX13
DUMMY-R3
CX21
SCD1U
PWRGOOD#RTCASRTCRWRTCDSPWRGOOD#
RTCAS
RTCRW
RTCDS
+5V+5VRTCSB: ADD DUMMY RESISTER TO
14
ENEXTCMOS
4
SA[0..15]
A0 12
A1 11
A2 10
A3 9
A4 8
A5 7
A6 6
A7 5
A8 27
A9 26
A10 23
A11 25
A12 4
A13 28
A14 29
A15 3
A16 2
CE
22VCC32
VSS16
VPP 1 DQ013
DQ114
DQ215
DQ317
DQ418
DQ519
DQ620
DQ721
PGM31
OE
24
A17/N.C30
U45
S128K8-150
SA0
SA1
+5V
BIOS ROM
C213
SCD1U
1 2 3 456D16
RB731U
SB:ADD 100KR3 FOR QUICK DISCHARGE4
3
2
1
Q6
S2N3906
1
2
R147
10KR3
C226
SCD1U
1
2RX21
100KR3
MEMW# SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
MEMW#
M+12V
4 19
19MEMR#
XSA16XSA17SA2
SA3
SA4
SA5
SA6
SA7
SA8
SA9
SA10
SA11
SA12
SA13
SA14
SA15
MEMR#4
25 1
2 3 1
4
7U44A
SSHC32
RTCROMCS#DISROMRTCROMCS#
DISROM
+5V
193
1 2
Q7
RN1424
FLASH_ONFLASH_ON
14
23X4
CAN32768
1
2BT1
BR1225-H1A