User Guide

Issue 1 12/04 COMPANY CONFIDENTIAL 43
Copyright © 2004 Nokia. All Rights Reserved.
RAE-6/RA-4
6 - Baseband Description and Troubleshooting Nokia Customer Care
■ Illumination troubleshooting
When lid open,
are all LEDs
illumanated in
PDA display?
Power on
NO
YES
Put a magnet next to
the hall sensor and
press some key on
cover, is CMT side
illuminated as it should?
YES
END
Are all LEDs
dead?
Measure LED
driver output from
N101 pin 4.
Is voltage
between 10-12V?
YES NO
Measure voltage
in N101 pin 8. Is
it high (>1.5V) or
is there PWM
signal?
Possible problem
with connector or
flex trace. Change
flex. OK?
NO
UEME FAULT?
Fault is in non-reworkable
component. Refer to
current BER handling
guidance.
NO
N101 failure.
Change
component (or
flex).
YES
YES
Measure DLIGHT
signal from N103
pin 2 with
oscilloscope. Is it
high or is there a
PWM signal?
YES
Check X102
connector pins
2,3 and 4. OK?
Change flex.
NO
NO
Check connector
X100 pin 30. OK?
NO
Change flex.NO
UEME FAULT?
Fault is in non-
reworkable
component. Refer
to current BER
handling guidance.
YES
Try again with
known good PDA
display. OK?
YES
Change flex.
NO
Yes, phone works
otherwise ok.
Change flex.
Try again with
known good PDA
display. OK?
NO
Is the PDA side still
illuminated?
NO
Possible Hall
reader fault. Visit
QWERTY
troubleshoot.
YES
The keypad is
illuminated and the
display is not?
Check connector
X101 pins 1 and
12. OK?
YES
Keypad and cover
display are dark?
NO
Measure voltage
from N102 pin 2. Is
it high? (>2V)
YES
Change N102.
OK?
YES
Change flex. NO
Check connector
X100 pin 28. OK?
NO
UEME FAULT?
Fault is in non-
reworkable
component. Refer to
current BER
handling guidance.
YES
Change flex.NO
CMT display is
illuminated and the
keypad is not?
NO NO
One of the LEDs is
broken. Change
the fault LED. OK?
YES
NO
NO
Change the CMT
display.
YES
Measure voltage
from J101
(or N103 pin 3).
Voltage between
10-12V?
YES
N103 failure.
Change
component (or
flex).
NO
Measure voltage
in N101 pin 1. Is
there ~VBAT
voltage?
YES
NO
OK
Fail in display
module’s LED flex.
Change display.
NO
Only half of the
LEDs are
illuminated?
Check R103, R104
and X102 pins 3
and 4.