MiTAC 7521 N - Page 104

103
7521
7521
N/B MAINTENANCE
N/B MAINTENANCE
7.6 KEYBOARD(K/B) TOUCH-PAD(T/P) TEST ERROR
Error message of keyboard failure is shown or any key doesn’t work.
U12
H8/3434F
KEYBOARD
CONTROLLER
KI[0~7]
KO[0~15]
J5
IOW#
IOR#
IRQ1
IRQ12
SD[0:7]
H8_KBCS#
+3V
RP519
U31
LPC
TO
ISA
W83626F
KBD_US/JP#
X2
16MHz
TOUCH-PAD MODULE
SW2
SW3
U508
74CBTD
3384
97
96
53
54
2
3
KBCS#
95
25
H8/T_DATA
L56
L57
J515
R245
R246
+5V
C245
H8/T_ CLK
SW2
SW1
L58
57
10
J500
T/P SWITCH B.D
CHARGE
B.D
SW B.D
QSB0#
QSB1#
QSB2#
QSB3#
QSB4#
BAT_D
BAT_C
J3
U35
W83601R
10
9
7
6
5
15
14
RP22
+5V
C9
L3
F1
K/M CLK
M DATA
M CLK
K/M DATA
68
58
20
11
FA5
1
2
5
6
4
J502
PS/2 Mouse
+5V
RP17
U22
SIS630