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Nokia Customer Care
RH-37 Series Transceivers
6(a) - Baseband Troubleshooting
Instructions
Issue 1 07/04 2004 Nokia Corporation Page 1
Company Confidential
RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
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Page 2 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(a) - BB Troubleshooting Instructions
Table of Contents
Page No
Test Points.................................................................................................................................................. 5
Troubleshooting........................................................................................................................................ 6
Top level flow 1 ..................................................................................................................................... 6
Top level flow 2 ..................................................................................................................................... 7
Phone is dead 1 ..................................................................................................................................... 8
Phone is dead 2 ..................................................................................................................................... 9
Flash faults 1 .......................................................................................................................................10
Flash faults 2 .......................................................................................................................................11
Phone is jammed 1 .............................................................................................................................12
Phone is jammed 2 .............................................................................................................................14
Charger ..................................................................................................................................................15
Xpress on Grip LEDs ...........................................................................................................................16
SIM Card ...............................................................................................................................................17
Audio faults 1 ......................................................................................................................................18
Audio faults 2 ......................................................................................................................................19
Audio faults 3 ......................................................................................................................................20
Audio faults 4 ......................................................................................................................................21
Earpiece .................................................................................................................................................22
Display faults 1 ...................................................................................................................................23
Display faults 2 ...................................................................................................................................24
Keypad faults 1 ...................................................................................................................................25
Keypad faults 2 ...................................................................................................................................26
Camera faults 1 ...................................................................................................................................27
Camera faults 2 ...................................................................................................................................28
Self test .................................................................................................................................................29
Functional cover interface ...............................................................................................................30
Issue 1 07/04 Nokia Corporation Page 3
RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
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Page 4 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(a) - BB Troubleshooting Instructions
Test Points
Issue 1 07/04 Nokia Corporation Page 5
RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Troubleshooting
Top level flow 1
TOP
Phone is Yes Phone is
totally dead
dead?
No
Flash
programming Yes Flash
does not work? faults
No
Phone does not Yes Phone is
start up or phone jammed
is jammed?
No
Charging does Yes
not work?
Charger
XPress on Grip Yes
XPress
LEDs do not on Grip
work? LEDs
No
TOP2
Page 6 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(a) - BB Troubleshooting Instructions
Top level flow 2
Issue 1 07/04 Nokia Corporation Page 7
RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Phone is dead 1
Phone is
dead
Failure in
Is VBAT=3.7VDC VBAT line,
No
(meas. on X2000)? check: X2000
Yes
Is voltage
=3,7VDC at L2200 and No Check: L2200
C2239 and C2239
Yes
Is Pin 1 on
S2419 "high" when Check R2423,
No C2402
power key is not
pressed?
Yes
Is Pin1 on
S2419=0VDC when Check S2419,
power key No
PWB
is pressed?
Yes
Dead2 Retest
Page 8 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(a) - BB Troubleshooting Instructions
Phone is dead 2
Dead2
Is Sleep CLK on Check: B2200,
J2802 = 32.8kHz, No C2241, C2210,
1.8Vpp? PWB then
replace D2200
Yes
See Waveform 1
Is
PURX=1.8VDC
on J2800 1sec. after Replace
No
power key D2200, PWB
is pressed?
Yes
Waveform 1
Is VR3=2.78VDC Check C2234
No then replace
seen at C2234?
D2200, PWB
Yes
Is there a
26MHz clock Check R2902,
No C2902
(typ) 850mVpp
at R2902?
Waveform 2
Yes See Waveform 2
Retest
Phone is
Jammed
Issue 1 07/04 Nokia Corporation Page 9
RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Flash faults 1
Flash
faults
Measure
Does the phone set the BSI pulse during
Fbus TXD Yes No
Flash programming.
at J2809 line high after Is it OK?
the startup?
Check BSI
Yes line, X2000,
No C2001 -
C2005, R2270,
C2270, R2273
Measure
FBUSTX line
during Flash
programming from
testpoint J2809.
Yes Is it 1.8V? No
Change UPP Change UEM
Does the phone set
Fbus TXD line
low after the
line has Yes
been high?
Change UPP
No
Flash
faults Retest
2
Page 10 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(a) - BB Troubleshooting Instructions
Flash faults 2
Issue 1 07/04 Nokia Corporation Page 11
RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Phone is jammed 1
Phone
is
jammed
Measure
VIO, VCORE,
VFLASH1,
No Check L2200,
VANA, VR3 voltages.
Are they C2239,
OK? BSI/BTEMP lines Waveform 3
and VBATT lines
Check
VBATT1-6, VIO,
VCORE, VFLASH1,
VANA, No Retest
Yes VR3 lines.
Are they ok?
Check BSI/BTEMP
lines. If OK UEM
Yes regulators are not
working. Change
Measure UEM.
32.8kHz
Sleep Clk
from testpoint J2802.
Is it OK? No See Waveform 4 Waveform 4
Measure
32.8 kHz Sleep Clk
from C2241.
Is it OK?
Yes No
See Waveform 3 Yes
Check B2200,
Change UEM
C2210, C2241.
Goto Part
2
Retest
Page 12 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(a) - BB Troubleshooting Instructions
P a rt 2
S e e W a v e f o rm 5
Waveform 5
M e a s u re
Check R2902 and
2 6 M H z R F C lk
C 2 9 0 2 . If o k
f ro m J 2 8 1 5 .
change N7500.
Is it O K ?
Yes
M e a s u re
P U R X s ig n a l
f ro m te s tp o in t No Change UEM
J 2 8 0 0 . Is it 1 .8 V ?
Yes
Jam m ed R e te s t
2
Issue 1 07/04 Nokia Corporation Page 13
RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Phone is jammed 2
Jammed
2
Waveform 6
Measure
Phone
watchdog signal
shutsdown after Yes CBUSDA from
30sec? testpoint J2805.
Is it ok?
No Waveform 7
No
Change UPP
See Waveform 6
Measure
DBUSClk 13MHz
signal from No
testpoint J2811.
Is it OK?
See Waveform 7
Yes
Waveform 8
Measure
FBUSRX signal
during phone info read No
from testpoint J2810.
Is it OK?
No
Check phone Change UEM
info.
Is it OK?
Measure
FBUSTX signal
during phone info read No
from testpoint J2809.
Is it OK?
Yes
See Waveform 8 Yes
Change UEM Change UPP
Retest
Page 14 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(a) - BB Troubleshooting Instructions
Charger
Charger If charging does not work, the cause
might be faulty or no calibration of BB.
Therefore the calibration should be
checked if the procedures in the flow
Connect chart do not help.
charger
(ACP-7E)
Does Does Check C2004,
Battery bar No the display show "Not Yes R2270, R2273
scroll? charging"? and C2270.
Yes No
Measure
Check FUSE
voltage over (TVS)
No F2000
V2000. Is it
>3.0 Vdc?
Check X2001,
Yes C2006, C2007,
F2000, L2003
and line.
Read
BTEMP value. Check R2001,
(compare it to ambient
No C2005 R2274,
temperature). Is it
C2271, R2271,
~25