MiTAC 8050QMA Manuel de service télécharger pdf (Page 122)

121

50QMA

N/B Maintenance

8.6 Keyboard (K/B) Touch-Pad (T/P) Test Error-1

Error message of keyboard or touch-pad failure is shown or any key does not work.

Keyboard or Touch-Pad

Test Error

Try another known good Keyboard

or Touch-pad.

Test

Ok?

Replace the faulty

Keyboard or Touch-Pad.

Check

J4, J5

for cold solder?

Yes

One of the following parts or signals on the motherboard

may be defective, use an oscilloscope to check the signals

or replace the parts one at a time and test after each

replacement.

Yes

Re-soldering.

Parts

U13

U14

U709

SW3

SW4

L48

Signals

+3VS

+VDD3

+KBC_CPUCORE

KI[0..7]

KO[0..15]

T_CLK

T_DATA

Is K/B or T/P

cable connected to notebook

properly?

Yes

Correct it.

Board-level

Troubleshooting

Replace

Motherboard

MiTac Secret

Confidential Document

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 137 138

Commentaires sur ces manuels

Pas de commentaire

MiTAC 8050QMA Manuel de service Page 122

Commentaires sur ces manuels

Produits connexes et manuels pour Carnets de notes MiTAC 8050QMA