Nokia RH-6 Series Baseband Description & Troubleshooting page 70

RH-6
6 - BB Description & Troubleshooting
A-cover assembly - keyboard
Continue
Are the Flip
keys working?
End
Page 70
Company Confidential
Change A-Cover
No Assy. Are the keys
working now?
No
Check X307 (solder
joints). Is it OK?
Yes
Check L303 - l309
(solder joints).
Are they OK?
Yes
Measure ROW2,
ROW3 and ROW4
lines from X307. Are
voltage level ~ 1.8V?
Yes
Measure SLEEPX-
signal fom testpoint
J403 when key is
pressed.
Is voltage level ~
1.8V?
Yes
When keypad is
pressed, are the
LED's turned on?
No
Illumination
fault
© 2003 Nokia Corporation.
CCS Technical Documentation
Retest failing
Yes
A-Cover Assy.
No Change X307
Change defect
No
part
No
Check lines ROW2,
ROW3 and ROW4
from X307. If OK,
change Z300. If still
fails, change UPP
Issue 1 10/2003