Acer Extensa 61X Service Manual page 226

SB: ADD DUMMY RESISTER TO
U40 PIN 22
23 PWRGOOD#
4 RTCAS
24 RTCRW
24 RTCDS
1
BT1
BH-12
2
4 SA[0..15]
+5V
U45C
1
4
RTCROMCS# 9
4
RTCROMCS#
8
DISROM 10
13 DISROM
7 SSHCT32
BIOSCE#
+5V +5V
1
R35
10KR3
2
U27
24 11
VCC AD7
PWRGOOD#
13 10
CS$ AD6
RTCAS
14 9
AS AD5
RTCRW
15 8
R/W$ AD4
RTCDS
17 7
DS AD3
G1 18 6
RST$ AD2
1 2 21 5
RCL$ AD1
22 4
EXTRAM AD0
GAP-OPEN 20 19
BC INT$
2 23
X1 SQW
1
MOT
3 12
X2 VSS
16
VSS
BQ3285E
CX31 X1 CX30
SC3P50V3KN 1 2 SC3P50V3KN
XTAL-32.768KHZ
HDD+5V
U52
SA0
20 8
A0 VCC
SA1 19
A1
SA2
18 21
A2 DQ0
SA3
17 22
A3 DQ1
SA4
16 23
A4 DQ2
SA5
15 25
A5 DQ3
SA6
14 26
A6 DQ4
SA7
13 27
A7 DQ5
SA8
3 28
A8 DQ6
SA9
2 29
A9 DQ7
SA10 31
A10
SA11
1
A11
SA12
12 7
A12 WE#
SA13 4
A13
SA14 5
A14
SA15 11 24
A15 VSS
10
8 XSA16 A16
8
XSA17
30 9
CE VPP
MEMR# 32 6
4 MEMR# OE A17
28F020-1
U52 IS TSOP PACKAGE,
MUST BE INSTALL.
FLASH_ON 2
8 FLASH_ON
## REMOVE U53 PAD
SD[0..7]
SD[0..7] 4,10,11,13,15
SD7 +5V
SD6
SD5 1
SD4 R9
SD3 10KR3
SD2
SD1 2
SD0 DX2
2 1 IRQ8#
IRQ8# 4,8
S1N4148
RTCIRQ8#
TPX3
TP-1
C265
SCD1U
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
MEMW#
MEMW# 4
BIOSVPP
C266
SCD1U
3
2 Q8
S2N3906
1
+12V
1
R222
10KR3
2
3
Q9
RN1424
1
ACER
TAIPEI TAIWAN R.O.C
Title
370P/J (RTC AND BIOS)
Size Document Number REV
A3 96149 SC
Date: February 12, 1997 Sheet 9 of 25