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8355 N/B MAINTENANCE
8355 N/B MAINTENANCE
138
8.7 Keyboard (K/B) Touch-Pad (T/P) Test Error
Symptom:
Error message of keyboard or touch-pad failure is shown or any key does not work.
ISA_IOW#
ISA_IOR#
ISA_IRQ1
ISA_IRQ12
SD [0:7]
U19
74CBTD
3384
ROMCS#
U511
Key Board
Controller
H8/F3437
KI [0:7]
KO [0:15]
KBD_CS0
J8
R640
0
Touch-Pad Module
SW4 SW7
J10
+5VS
L517
600Z/100M
H8_KBCS#
8
93
96
97
53
54
23
18
R642 1M
X501 16MHz
C678
18P
C679
18P
3
2
25
L523
SW4
SMT1-03
SW7
SMT1-03
SW_LEFT
SW_RIGHT
5 , 6
7 , 8
12 , 11
10 , 9
1,2
1
2
95
H8_T_CLK
T_DATA
U509
Super I/O
PC87393
P22
P23
P23
P22
P22
KI5KI6
KO0
SCRL_UP
SCRL_LEFT
SW5
SW8
SW6
SW9
VDD5
R821
10K
P23
SCRL_DN
SCRL_RIGHT
L522
ISA_MCCS#
H8_MCCS#
SA2
R209
10K
159
98
14
7273
KI4 KI3
+5V_TP
C759
0.1U
From U20
South Bridge
R216
0
R829
0
F504
0.5A/POLYSW
R288
22
R305
22
R297
22
R333
22
R289
22
R306
22
R298
22
R334
22