MiTAC 7521 PLUS/N - Manual (Page 118)

117
7521 7521 Plus / N N/B MAINTENANCE Plus / N N/B MAINTENANCE
8.6 KEYBOARD(K/B) TOUCH-PAD(T/P) , ESB TEST ERROR
Error message of keyboard failure is shown or any key doesn’t work.
U14
H8/3434F
KEYBOARD
CONTROLLER
KI[0~7]
KO[0~15]
IOW#
IOR#
IRQ1
SD[0:7]
H8_KBCS#
+3V
RP520
U31
LPC
TO
ISA
W83626F
KBD_US/JP#
X2
16MHz
SW2 SW3
U507
74CBTD
3384
97
96
53
2
3
KBCS#
95
25
L54
L53
J515
+5V
C262
SW2
SW1
L55
10
J500
T/P SWITCH B.D
CHARGE
B.D
SW B.D
QSB0#
QSB1#
QSB2#
QSB3#
QSB4#
BAT_D
BAT_C
J3
U11
W83601R
16
15
14
13
7
2
1
RP7
+5V
L3 F1
K/M CLK
M DATA
M CLK
K/M DATA 68
58
20
11
FA5
5
2
1
6
4
J502
PS/2 Mouse
RP18
U24
SIS 630S
SH6
SH18
SH20
SH20
SH20
SH21
J501
KI1
KI2
KI3
KI4
KI5
SH12
SH12
J5
+5V
C6
IRQ12 H8/T_DATA 54 57
H8/T_ CLK
TOUCH-PAD MODULE