Nokia RH-37 Series Guide

Nokia Customer Care
RH-37 Series Transceivers
Issue 1 07/04 2004 Nokia Corporation Page 1
Company Confidential
6(a) - Baseband Troubleshooting
Instructions

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 2 Nokia Corporation Issue 1 07/04
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Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 3
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

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 4 Nokia Corporation Issue 1 07/04
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Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 5
Test Points

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 6 Nokia Corporation Issue 1 07/04
Troubleshooting
Top level flow 1
Yes
Yes
No
No
No
No
TOP
Phone is
totally
dead?
Flash
programming
does not work?
Phone does not
start up or phone
is jammed?
Charging does
not work?
Yes
Yes
Phone is
dead
Flash
faults
Phone is
jammed
Charger
TOP2
XPress on Grip
LEDs do not
work?
XPress
on Grip
LEDs
Yes

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 7
Top level flow 2

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 8 Nokia Corporation Issue 1 07/04
Phone is dead 1
Is voltage
=3,7VDC at L2200 and
C2239
Phone is
dead
Is VBAT=3.7VDC
(meas. on X2000)?
Is Pin 1 on
S2419 "high" when
power key is not
pressed?
Is Pin1 on
S2419=0VDC when
power key
is pressed?
Dead2
Yes
Failure in
VBAT line,
check: X2000
Check: L2200
and C2239
Yes
Check R2423,
C2402
Check S2419,
PWB
Yes
Yes
No
No
No
No
Retest

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 9
Phone is dead 2
Is
PURX=1.8VDC
on J2800 1sec. after
power key
is pressed?
Dead2
Is Sleep CLK on
J2802 = 32.8kHz,
1.8Vpp?
Is VR3=2.78VDC
seen at C2234?
Is there a
26MHz clock
(typ) 850mVpp
at R2902?
Yes
Check: B2200,
C2241, C2210,
PWB then
replace D2200
Replace
D2200, PWB
Yes
Check C2234
then replace
D2200, PWB
Check R2902,
C2902
Yes
No
No
No
No
Retest
See Waveform 1
See Waveform 2
Phone is
Jammed
Yes
Waveform 1
Waveform 2

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 10 Nokia Corporation Issue 1 07/04
Flash faults 1
Measure
BSI pulse during
Flash programming.
Is it OK?
Measure
FBUSTX line
during Flash
programming from
testpoint J2809.
Is it 1.8V?
Yes No
Yes
No
No
Yes
No
Yes
Flash
faults
Does the phone set the
Fbus TXD
at J2809 line high after
the startup?
Does the phone set
Fbus TXD line
low after the
line has
been high?
Flash
faults
2
Change UPP
Change UPP Change UEM
Check BSI
line, X2000,
C2001 -
C2005, R2270,
C2270, R2273
Retest

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 11
Flash faults 2

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 12 Nokia Corporation Issue 1 07/04
Phone is jammed 1
Measure
32.8 kHz Sleep Clk
from C2241.
Is it OK?
Yes
No
No
Yes
Yes
Phone
is
jammed
Check
VBATT1-6, VIO,
VCORE, VFLASH1,
VANA,
VR3 lines.
Are they ok?
Check L2200,
C2239,
BSI/BTEMP lines
and VBATT lines
Check BSI/BTEMP
lines. If OK UEM
regulators are not
working. Change
UEM.
Check B2200,
C2210, C2241.
Change UEM
Measure
32.8kHz
Sleep Clk
from testpoint J2802.
Is it OK?
Measure
VIO, VCORE,
VFLASH1,
VANA, VR3 voltages.
Are they
OK?
Yes
No
No
See Waveform 3
See Waveform 4
Retest
Goto Part
2
Retest
Waveform 3
Waveform 4

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 13
Measure
PURX signal
from testpoint
J2800. Is it 1.8V?
Change UEM
No
Yes
Retest
Jammed
2
Measure
26MHz RFClk
from J2815.
Is it O K?
Yes
See W aveform 5
Check R2902 and
C2902. If ok
change N7500.
Part 2
Waveform 5

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 14 Nokia Corporation Issue 1 07/04
Phone is jammed 2
Measure
watchdog signal
CBUSDA from
testpoint J2805.
Is it ok?
Measure
FBUSRX signal
during phone info read
from testpoint J2810.
Is it OK?
Measure
FBUSTX signal
during phone info read
from testpoint J2809.
Is it OK?
Yes
No
No
No
Yes
No
No
No
Yes
Yes
Jammed
2
Phone
shutsdown after
30sec?
Measure
DBUSClk 13MHz
signal from
testpoint J2811.
Is it OK?
Check phone
info.
Is it OK?
Change UEM Change UPP
Change UEM
Change UPP
See Waveform 7
See Waveform 6
See Waveform 8
Retest
Waveform 6
Waveform 7
Waveform 8

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 15
Charger
Connect
charger
(ACP-7E)
Check R2001,
C2005 R2274,
C2271, R2271,
and line.
Change UEM
Retest
Check X2001,
C2006, C2007,
F2000, L2003
and line.
Yes
No
Yes
No
No
Yes
Yes
Remove (fuse)
F2000 and measure
current. Is it
~350...390 mA?
Read
BTEMP value.
(compare it to ambient
temperature). Is it
~25°C (0319)?
Measure
voltage over (TVS)
V2000. Is it
>3.0 Vdc?
Does
Battery bar
scroll?
Charger
Does
the display show "Not
charging"?
No
Check C2004,
R2270, R2273
and C2270.
Check FUSE
F2000
Yes
No
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
chart do not help.

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 16 Nokia Corporation Issue 1 07/04
Xpress on Grip LEDs
XPress
on Grip
LEDs
Are all LEDs on? Yes
Check LEDs, transistors V2421- V2425, resistors
R2402 - R2419. Change faulty component. The
LEDs V2408, V2409, V2410 or V2411 are placed
below the shielding frame and repair would be very
difficult . Therefore if one of these LEDs is faulty,
repair can be considered as uneconomic. Board
exchange might be taken into account.
Are
GENIO 8,11,12,13,21,15,16 and 17
high?
No
Yes
Change UPP
D2800
No
Retest
Set phone in Local mode.
Select LED Control from menu
Testing using Phoenix. Turn all
LEDs on.
Are
KLIGHT and KLIGHT2
< 0,5 V ?
Change UEMEK
D2200
No
Yes
End

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 17
SIM Card
SIM
card
Insert
SIM card
faults?
Does phone enter
LOCAL MODE.
OK?
Measure
VSIM voltage
from X2700.
Is it 3V or
1.8V?
Check SIM
power Up sequence.
Is it OK?
Check BSI line,
X2000, C2004,
R2270, C2270,
R2273.
If OK change UEM.
Check VSIM line,
X2700, C2703,
C2219.
If ok change R2700.
If still wrong VSIM
voltage change UEM
Check SIM lines.
If OK change R2700.
If still fail change
UEM.
Change UPP
Retest
Yes
No
Yes
No
Yes
Yes
No
No

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 18 Nokia Corporation Issue 1 07/04
Audio faults 1
Measure
DC offset
voltagefrom Earpiece
pads. is it ~1.38V
to GND?
Set phone in LOCAL
mode.
Use Phoenix Audio
Test.
Set EXT IN, HP OUT,
LOOP ON
Measure
MICB2voltage
from XMICP
pads. Is it ~2.2V
Yes
No
Yes
Yes
Yes
No
No
No
Audio
faults
Is HP
earpiece
working?
Audio
faults 2 Earpiece Audio
faults3
Check L2150,
R2151, C2179
and line.
If OK change
UEM.
Retest
Try
changing earpiece.
Is it working
now?

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 19
Audio faults 2
Audio
faults
2
Change
microphone.
Is it working
now
Measure MICB1 DC
voltage from MICP pad, J2430.
Is it >1,0VDC
Retest
Set phone in LOCAL mode.
Use Phoenix Audio Test.
Set Hp microphone in, Ext
speaker out, Loop On.
Audio
faults
3
Check R2160,
C2152, C2175,
R2156, L2153,
C2154 and line. If
OK change UEME
Check R2153,
R2154, C2159,
C2171 and line.
If OK change UEM. If
still fail change UPP
Yes
No
No
Yes No
Yes
Is HP
microphone
working

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 20 Nokia Corporation Issue 1 07/04
Audio faults 3
Measure DC
volts on
speaker pads of
X2002, pin 11 - 14. Are they
~0,8V DC (to GND)
Set phone in LOCAL mode.
Use Phoenix Audio Test. Set
Ext microphone in Ext speaker
out, Loop On.
Change UEM
Check L2001, C2020,
C2021, C2181, R2175,
X2002 and lines. If ok
change UEM
Set phone in LOCAL mode.
Use Phoenix Audio Test. Set
Ext microphone in Ext
speaker out, Loop On
Check R2174, R2162,
C2170, C2173 and
lines. If ok change
UEM
Audio
faults
4
Measure DC volts
on micp pad of
X2002, pin 10. Is it
~2.2 V DC (to GND)
Check R2173, C2150,
C2176, C2184, R2158,
R2171, L2000, C2012,
C2013, X2002 and
lines. If ok change UEM
Yes
No
Yes
Yes
Yes
No
No
No
Audio
faults
3
Is Ext-mic
working
Is Ext-ear
worki ng
Retest