Nokia RM-11 Series Troubleshooting Manual page 56

RM-11
Troubleshooting - Baseband
FM Radio Faults
FM Radio
faults
Is the FM radio
working?
YES
Does the FM radio
produce a "Bong"
sound when
changing channels
(frequencies)?
YES
Check soldering
under C358/R359/
R360/C362. If not
working, then
change FM radio
chip (N356)
©2005 Nokia Corporation
Page 56
Power on mobile
terminal and turn FM
NO
radio on using
Phoenix.
YES
Measure VFlash2
(VCCD/VCCA/
VCCVCO) at C359/
C372/L357. Is it
2.8V?
YES
Measure FM1=1.8V,
FM2=11 Khz,
FM3=1.8V, and
FM4=32 Khz. Is it
OK?
NO YES
Measure FMANT at
L358. Is it 1.0V?
YES
FM
END
Radio
faults 2
CC Technical Documentation
Check solder on
N356, X101, and
NO
replace N356 if not
working.
Check VFlash2 line
NO
Change UPP (D400)
NO
Check L351, L358,
C367, C378, C379,
C112, C113, C114,
C115. If OK, check
NO
Pop-port connector
(X101) on pin 11, 12,
13, 14.
Confidential
From
FM
Radio
faults 2
Issue 2 09/2005