Keypad problems

1. Connect the phone under test to Wintesla.

2. Select Testing -> User interface testing

3. Select the CMT to be tested from the "Display" panel and click "Start key test" (figure 1). The test starts and the button text changes to "Stop key test".

4. Click the "Stop key test". Result window (Figure 2) appears.

All letters under the key names should show "A".

Repeat the test. If the result is the same, use table 1 to find out the signals connected to the particular key(s).

5. Click "Start key test" again.

This time, press and release all keys through, then stop the test.

There should be "P" for every key.

If "A" results are seen, repeat and press these keys again. If key presses are not registered, find out the signals connected to the key.

6. Change the keypad to be tested to PDA. Repeat test steps 4 and 5 for the PDA keyboard. The result window is shown in Figure 3.

7. Open the CMT side cover. Check the 50-way connector on UL2.

Is it properly inserted, both parts of the connector properly soldered?

Repair, retest

8. Check CMT key mat alignment and membrane switches on the mat. Replace key mat if broken.

9. Check 70-way connector on KL8.

Is it properly inserted, both parts of the connector properly soldered?

Repair, retest

10. Locate the faulty part by placing the parts into service jig and changing the parts one by one. Follow instructions in the proper section (2.23 for KL8 fault, 4.4 for UL8 flex fault, 3.5 for UL2 display module fault).

Table 1. Keyboard matrix (keys on UL2 module highlighted) - English keymat

Col0

Coll

Col2

Col3

Col4

Col5

Col6

Col7

Col8

Col9

Row0

cmt Soft1

cmt Up

cmt Soft2

pda Soft 3

pda Soft 1

Space

Info <

/ >

Row1

cmt Send

cmt Down

cmt End

pda Soft 4

pda Soft 2

Z

Shift

C

B

Row2

cmt 1

cmt 2

cmt 3

cmt Profile

cmt Power

Chr

N

M

, @

Row3

cmt 4

cmt 5

cmt 6

cmt *

cmt #

Menu

Up

Right

Down

Left

Row4

cmt 7

cmt 8

cmt 9

cmt 0

■ 5

+-

Backspace

Enter

Row5

ESC

App1

App2

App3

app4

App6

App7

App8

Row6

Ctrl

V

X

6

App5

Row7

1

2

3

4

5

7

8

9

0

P

Row8

Tab

Q

W

E

R

T

Y

U

I

O

Row9

Caps

A

S

D

F

G

H

J

K

L

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