MiTAC 8355 service manual Keyboard K/B Touch-Pad T/P Test Error, Key Board Controller

8355 N/B MAINTENANCE

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.

J8

P22

From U20

KBD_CS0

25

P23

South Bridge

SA2

93

P23

KI [0:7]

KI6

KI5

KI4

KI3

KO [0:15]

ISA_IOR#

96

R288

R289

SW5

SCRL_UP

KO0

U509

22

22

ISA_IOW#

97

P22

R305

R306

SW8

SCRL_DN

Super I/O

22

22

ISA_IRQ1

53

R297

SW6

R298

PC87393

SCRL_LEFT

U511

22

22

ISA_IRQ12

54

R333

SW9

R334

SCRL_RIGHT

Key Board

22

22

SD [0:7]

Controller

F504

+5V_TP

VDD5

H8/F3437

J10

0.5A/POLYSW

1,2

+5VS

P22

73

72

L517

C759

R821

R209

R640

L523

600Z/100M

0.1U

23

H8_T_CLK

0

12 , 11

10K

10K

H8_KBCS#

95

L522

R216

R829

18

T_DATA

10 , 9

0

0

H8_MCCS#

98

SW4

7 , 8

9

15

SW_LEFT

SMT1-03

8

U19

3

R642

1M

2

5 , 6

SW_RIGHT

ROMCS#

74CBTD

SW7

X501

16MHz

14

SMT1-03

ISA_MCCS#

3384 P23

1

2

C679

C678

18P

18P

SW4SW7

Touch-Pad Module

138