Nokia 6230 Servicehandbuch

RH-12/RH-28

Baseband Troubleshooting Instructions

CCS Technical Documentation

Page 40

 Nokia Corporation

Issue 1 02/04

UI-module

keys working

Try to change UI

PWB. Are the

keys working now

?

Retest UI module

Check X300 & X301

(Soldering and spring

contacts). Is it okay?

Change X300 and/

or X301

No

No

Yes

No

When keypad is

pressed, are the

LED's lit?

Check lines Row0-Row4,
UP, DOWN,and SELECT

from X300.

If Ok, change Z300 and/or

Z301. If it still fails, change

TikuEdge

Illumination fault

End

Yes

Yes

Yes

Yes

No

No

No

Measure SleepX

signal (J403), when key is

pressed. Is voltage level

~1,8 V?

Measure Row0-Row4,

UP, DOWN and SELECT

lines from X301. Are

voltage levels ~1,8 V?