Nokia 7600 - Cell Phone 29 MB Operating instructions

Customer Care Solutions
NMM-3 Series Transceivers
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-1
Company Confidential
6-Troubleshooting

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-2 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Table of Contents
Page
No
Introduction to NMM-3 troubleshooting .............................................................................. 3
General guidelines for NMM-3 troubleshooting ................................................................. 3
Tools needed for troubleshooting .............................................................................. 3
General guidelines .......................................................................................................... 3
Nominal current consumption ................................................................................. 4
Diagnostics .................................................................................................................................... 5
Phone is Dead ..................................................................................................................5
Flash Programming Fault .............................................................................................. 6
SIM Card Fault .................................................................................................................7
Keypad Fault ..................................................................................................................... 8
Display Fault .................................................................................................................... 10
Illumination Fault ........................................................................................................... 11
Charge Fault ..................................................................................................................... 12
Accessory Fault ................................................................................................................13
Audio Fault ....................................................................................................................... 14
Camera Fault .................................................................................................................... 15
USB Fault .......................................................................................................................... 16
GSM900/1800 Tx Troubleshooting ............................................................................ 17
Helgo Troubleshooting .................................................................................................. 18
PA & Antenna Switch Troubleshooting .................................................................... 19
GSM Rx Troubleshooting .............................................................................................. 20
GSM1800 Rx Troubleshooting .................................................................................... 21
GSM900/1800 Synthesizer Troubleshooting .......................................................... 22
WCDMA Tx Troubleshooting ........................................................................................ 23
PA & DC-DC Converter Troubleshooting .................................................................. 24
WCDMA Rx Troubleshooting ....................................................................................... 25
WCDMA Rx Synthesizer Troubleshooting ................................................................ 26
WCDMA Tx Synthesizer Troubleshooting ................................................................. 27
GSM/WCDMA Antenna Troubleshooting ................................................................. 28
Test Points ...................................................................................................................................... 28
Calibration required when components changed ............................................................... 31
Tables
1 Baseband Components .................................................................................................. 31
2 WCDMA tuning alignments to be run when RF components are changed .... 31
3 GSM tuning alignments to be run when RF components are changed ........... 31

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-3
Company Confidential
Introduction to NMM-3 Troubleshooting
This document is intend to be a guide for localizing and repairing electrical faults in the
NMM-3 device. First there is a brief guide for fault localizing. Then fault repairing is
divided into troubleshooting paths.
Before any service operation you must be familiar with the NMM-3 product and module
level architecture. You should also be familiar with the NMM-3 specified service tools
such as the Phoenix service software, flashing tools and software.
General guidelines for NMM-3 trouble shooting
Tools needed for troubleshooting
• Service tools (as listed at service tools chapter in service manual)
• Laboratory power supply with current indicator
• Oscilloscope
• Digital multimeter …
General guidelines
If the device cannot be turned on by any means, see “dead device” trouble shooting
Current consumption (missing consumption) gives an idea whether the device is able to
start up.
Dropping supply voltage or very large current consumption indicates a short circuit
Check whether the connection with Phoenix works and what can be discovered with
Phoenix (ADC-readings, baseband selftest, bb-calibrations etc.)
Check baseband selftests with Phoenix if “CONTACT SERVICE” is shown on the display.
Check visually display and rocker faults
Force phone to LOCAL mode and make keyboard test by phoenix
Check that board-to-board connector is OK, and connectors make good contacts.
If liquid damage, stop repairing!
Flash phone before disassembling it if fault is not obvious and Phoenix connection is OK.
Disassemble phone:
Try to locate failed module, is it Engine, UI or camera module.
Check failed module visually:

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-4 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Mechanical damages?
Solder joints OK?
Continue with specific trouble shooting procedure for the module:
If there is an obvious fault, repair it before reflashing the device
Flash first if a fault is not obvious
If flashing is not working go to flashing trouble shooting
Due to CSP packages short circuits or broken solder joints are not easily seen. If the
examined signal seems to be continuously in low or high level, then measure for possible
short circuit to ground (signal low) or to supply voltage (signal high) Note that if a prob-
lem is not found from any visible contact/component it can be under CSPs where the sig-
nal is connected.
Care must be taken when assembling and disassembling the transceiver. Failure to do
this may result in unnecessary damage to device.
Nominal current consumption
NOTE: Service tools need some amount of current to work.
The following current consumption values are measured from a complete NMM-3.
Vbatt = 3.6V
Measured nominal currents are drawn from the main battery.
Measurements have been made with a current probe connected to an oscilloscope.
Operating mode Current consumption
Idle 90 mA
2w audio call (backlights off) 350 mA
Viewfinder 260 mA

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-5
Company Confidential
Diagnostics
Phone is Dead
Start
Is phone
current 0 mA?
Y
es
Will the phone
power-up in
Test or Local
mode?
Replace
X200
No
Check BSI
circuit R204
OK?
Y
es
Replace
R204 No
With the phone in
LOCAL mode, using
Phoenix check battery
voltage, recalibrate if
necessary.
Y
es
No
Is flash
programming
working?
Y
es
No
Flash fault
Check X200
(contact and
solder joints).
OK?
No
Are VFLASH1 and
V
IO enabled
momentarily at
power up?
Replace
UEME
D200
No
Y
es
Check RF-CLK
at both sides
of C300. Is it
19.2MHz?
Check R822,
C300, C861,
C870 and
L899. OK?
No
Y
es
Replace
G820
Y
es
Possible
problem with
TIKU, UEME, or
Memories.
Y
es
No
Replace
defective
part.
End

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-6 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Flash Programming Fault
Start
Is the FBUS TX-
line HIGH after
startu
p
?
No
Measure BSI-
pulse during
flash operation.
OK?
Check BSI circuit
including X200,
R204, R209, R214
and C226. OK?
No
Measure FBUS
TX-line during
flashing. Is it
~1.8V?
Y
es
Check R403, if
OK replace
UEME D200.
No
Replace TIKU
D300
No
Y
es
Is FBUS TX-line set
LOW after it has
been HIGH?
Wrong
manufacture ID
and device ID
Y
es
Y
es
Replace
Program
Flash D451
End (reset)
Y
es
Y
es
No
Phone is
dead
Possible short
circuit under TIKU
or program flash.
Replace or reflow
devices, Retest. OK?
No

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-7
Company Confidential
SIM Card Fault (Insert SIM / Card Rejected)
End
Start
Set phone to
LOCAL mode. Is
it OK?
No
Check BSI circuit
including X200, R204,
R209, R214 and C226.
If OK replace UEME
Measure FBUS
TX-line during
flashing. Is it
~1.8V?
Check SIM lines, if
OK replace UEME
D200.
Replace TIKU
D300
Y
es
Measure VSIM
V
oltage on C405.
Is it ~3.0V?
Check SIM
power-up
sequence. Is it OK
Y
es
No
No
Y
es
Check SIM connector
makes good contact
to SIM X405. OK? No Replace SIM
connector X405
Y
es

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-8 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Keypad Fault
Start
Measure Voltage on
S400 when pressed.
Is it high?
Check
S400 is
OK?
Check R432, R40
and R439 and
line, if OK,
re
p
lace UEME.
Replace S400
No
Is the volume
up key
working?
Is the power key
working?
No
Measure voltage
on S400 is it
hi
g
h?
Y
es
No
Y
es
Phone is
dead
Phone is
dead
Y
es
No
Is the volume
down key
working?
Y
es
Measure COL1 from
S402, when pressed, is
there a 50
µ
s
p
ulse?
Check S402, R400
and R438, if it still
fails replace TIKU
D300.
Replace TIKU
D300
Y
es
No
Measure ROW5
line from S402.
Is it ~1.8V?
Y
es
No
Check S402, R400
and R436, if it still
fails replace TIKU
D300.
No
Measure COL0 from
S402, when pressed, is
there a 50
µ
s
p
ulse?
Check S403, R400
and R438, if it still
fails replace TIKU
D300.
Replace TIKU
D300
Y
es
No
Measure ROW5
line from S403.
Is it ~1.8V?
Y
es
No
Check S403, R400
and R437, if it still
fails replace TIKU
D300.
No
Y
es
Continue
Y
es

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-9
Company Confidential
Replace the UI-
module. Are keys
workin
g
now?
Are the UI-
module keys
working?
Y
es
No
Y
es
Continue
Retest the faulty
UI-module.
Y
es
No
Check X400 solder
j
oints and spring
contacts. OK?
Replace
X400
No
Measure ROW0 –
ROW5 lines from
X400. Are voltage
levels ~1.8V?
Measure SLEEPX signal
on testpoint J301
when a key is pressed.
Is voltage level ~1.8V?
No
Y
es
When a key is
pressed, do the
LED’s illuminate?
Check ROW0 – ROW5
lines from X400. If OK
replace TIKU.
No
No
End
Illumination
Fault

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-10 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Display Fault
Start
Check X400 and UI
connector X3
contacts and solder
j
oints. OK?
No Replace
defective part.
Check
continuity of
V
IO and
V
FLASH1, and
Replace TIKU
D300.
Are Display
LEDs
illuminatin
g
Y
es
Measure VIO (1.8V)
and VFLASH1 (2.7V) at
X3. are they OK?
Check for activity on
data, address, and WRX
lines and the RESX line
on power up. OK?
Y
es
No
No
End
Replace display
module. Does the
display now work?
Y
es Replace display
module.
No
Y
es
No Illumination
Fault

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-11
Company Confidential
Illumination Fault
Start
Replace display module.
Do lights work?
No
Are the display
LED’s working? No
Measure voltage on
V
400 Cathode.
Y
es
Check V400 and
L400. Are they OK?
Are the keypad
LED’s working?
~
18V
Y
es Replace Display
Check X400 and
X
3 contacts and
solder joints.
OK?
Replace
defective part.
Y
es
No
Replace
N400
~
0V
Replace
defective part.
Y
es
No
Replace
N400
Replace UI-module. Do
lights work?
No
No
Measure voltage on
R426. Is it ~2.2V?
Retest
No
Y
es
Replace
Keypad
LEDs
Check X400 and
X
3 contacts and
solder joints.
OK?
Replace
defective part.
Y
es
No
Y
es
Measure voltage on
V
400 Cathode. Is it
~10.5V?
Check V400 and L400.
Are they OK?
Y
es
Replace
N400
No
Replace
defective part.
No
Y
es Replace
N402
End

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-12 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Charger Fault
Start
Use Phoenix to
read BTEMP.
~Ambient?
Y
es
Replace
defective part.
Y
es
Using Phoenix with
the JBV-1 recalibrate
battery voltage and
charger current and
voltage.
End
Is charger rejected
when connected. No
Check X402,
F400, L402, V403,
C410, R200 and
C411. OK?
Y
es
No
Replace UEME
D200.
Check BTEMP
circuit including
X210, R211 and
C227. OK?
No
Y
es
Replace
defective part.
No

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-13
Company Confidential
Accessory Fault
Start
Check system
connector X401
contacts and solder
j
oints. OK?
Repair or replace
system connector.
No
ACI-Accessor
y
Non ACI-Accessor
y
Measure ACI line
(pin 3). Is it ~0V?
Look for activiy on
the ACI line on
initial accessory
connection.
Y
es
Check ACI line,
L4??, R429, R409.
If faulty, replace
defective part
and retest.
No No
Measure VOUT
(pin4) Is it ~2.8V?
Y
es
Check L4??
and R409.
OK?
No Replace
defective part.
No
Replace
UEME D200.
Y
es
In a call, check
operation of
XEAR and XMIC
Y
es
Y
es
No XMICNo XEAR
Check L404, L403,
R415, C412 and
C413. OK?
Replace UEME
No
Y
es
Replace
defective part.
Check L405-L407,
C416-C419 and
R421. OK?
Replace UEME
Y
es
No
End
In a call, check
operation of XEAR
and XMIC.

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-14 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Audio Fault
Start
Is the problem with the
Uplink or Downlink?
Does hands free
work?
U
p
linkDownlink
No
TIKU or UEME
Fault
Check contacts and
solder joints of UI
connector X400 and
earpiece connector,
replace earpiece if
necessary. OK?
Y
es
No
Y
es
Is the DC bias
voltage at R405
and R406 ~1.35V? No Replace
UEME
End
Measure MIC
Bias voltage
across R104, is it
~2.1V?
Check Microphone and
contacts, R103, R104, R105,
C103, C104 and L102
replace defective part.
No
Y
es
Replace
defective
part

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-15
Company Confidential
Camera Fault
Start
Is ‘Operation Failed’
message returned
when the camera is
selected?
Replace camera
module.
No
Y
es
Check camera
module is fitted
correctly and
contacts are OK?
Replace or refit
camera module.
No
Y
es
In view finder
mode, check VOUT
on N102 is ~1.8V
Replace
regulator N102
No
Y
es
In view finder
mode, check for
activity on signal
and clock lines.
Replace TIKU
D300
No
Y
es
Replace camera
module.
End

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-16 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
USB Fault
Start
Connect a USB device
to phone and check
N401 Vpu goes to 3.3V.
Check VCC
for ~5V
No
Y
es
Is there any
activity on
D+ and D-?
Y
es
No
Check R423, R424,
R410, R413 and
X410. OK?
Y
es
No
Replace
defective part.
Replace N401.
OK?
End
Check R442, L411,
C414 and X401.
Replace if defective.
No
Y
es
Replace
TIKU
No
Y
es

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-17
Company Confidential
GSM900/1800 TX Troubleshooting
Replace faulty
component
Tx OK
Check output signal level
from antenna conncetor
+32.5dBm @ 897.4MHz (GSM900)
+29.5dBm @ 1747.8MHz (GSM1800)
OK ?
Check all
power levels
OK ?
Tune Tx
power levels
OK ?
Tx signal found ?
Check output signal
on 500MHZ span
Signal found on
correct frequency ?
Synthesizer
troubleshooting
HELGO
troubleshooting
Check with RF probe signal
level on PA input
+0dBm on 900 PA i/p
-1dBm on 1800 PA i/p
OK ?
Start Tx power level tuning
and check tuned DAC values:
Highest level ~700 (GSM900)
Highest level ~600 (GSM1800)
Lowest level ~170
Base level ~150
Major differences ?
Check with oscilloscope
900 & 1800 PA CONTROL
VPCTRL >1.5V max
C564/C565
OK ?
PA & ant. switch
troubleshooting
Check Tx filter/
Tx balun input level
-4dBm on 900 FILT i/p
-4dBm on 1800 BALUN i/p
OK ?
Tune TX DAC
values
Check power control
loop components
OK ?
Replace faulty
component
Replace HELGO
Yes
Yes
No
Yes
No
Yes
No
No
No
Yes
No
Yes Yes
Yes
No
No
Yes
No
Yes
No
Phoenix Settings:
Band = GSM900/GSM1800
Active Unit = Tx
Op Mode = Burst
Tx Chan = 37 GSM900
Pwr Lvl = 5
Tx Chan = 700 GSM1800
Pwr Lvl = 0
PA Mode = Free
Tx Data Type = Random
Yes

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-18 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
HELGO Troubleshooting
Y
es
Y
es
Check with RF FET Probe:
V
CO Output signal
3589.6Mhz CH37 (GSM900)
3495.6MHZ CH700 (GSM1800)
Level>-10dBm
OK?
No
No
Y
es
Check with scope/multimeter
TXI/TXQ Signals
V
R2,VR3,VR4,VR5,=2.8V
V
R1A=4.8V
V
REF01=1.35V
HELGA serial interface
TXP & TXC signals
OK?
Y
es
Check modulator output
components
OK?
Replace Helgo
Replace faulty
components
No
Phoenix Settings:
Band=GSM900
Active Unit=Tx
Op Mode=Burst
Tx Chan=37
PA Mode=Free
Pwr Lvl=19
Synthesizer
Troubleshooting
Baseband
Troubleshooting
HELGO

CCS Technical Documentation 6-Troubleshooting
Company Confidential NMM-3
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-19
Company Confidential
PA and Antenna Switch Troubleshooting
Check with RF probe
+4dBm 900MHz
-4dBm 1800MHz Check with oscilloscope:
Check Ant Switch
GSM VANT-2 = 2.6V pulse
GSM VANT-1 = 2.6V pulse
OK ?
Check VANT line components
L638/L639/C551/352
OK ?
Check with oscilloscope:
VBatt = 3.8V
VCC1 = VCC2 = VCC3 = 3.8V
VTXLO-G= 2.8V pulse (0V GSM1800)
VTXB-G= 2.8V pulsed (0V GSM1800)
VTXB-D= 2.8V pulsed (0V GSM900)
OK ?
Check components
around PA
OK ?
Replace faulty
component
Replace HELGO
Replace PA
Replace faulty
component
Replace ant.
switch
Yes
Yes
No
Yes
Yes
Yes
No
No
No
Yes
OK ?

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-20 Copyright 2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
GSM900 RX Troubleshooting
Y
es
No
No
No
No
Y
es
Apply a –85dBm
942.46771MHz signal
from generator to RF
connector
Scope at
GRXI/GRXQ
Signal 1.3Vpp
DC Offset=1.2V
Freq=67.7KHz
900MHz chain
functional
Change
generator
level to
–50dBm
Is spectrum analyser
Ant Switch output
-53dBm?
Spectrum analyser
ant switch Input
-51dBm
Spectrum
analyser
V
CO output
3769.6MHz
-20dBm
Scope
V
ant_1 =0
V
In Rx mode
Check
ant switch
Check
Helgo
Y
es
Y
es
Y
es
Y
es
Y
es
Spectrum analyser
Helgo Inputs
-54dBm
Check
V
R2,VR3,VR4,VR5=2.8
V
Helgo serial interface
Baseband
Troubleshooting
Synthesizer
troubleshooting
No
No
Y
es
Y
es
Check
L633,L634
No
Phoenix Settings:
Band:GSM900
Active unit:RX
Op Mode:Continuous
Rx/Tx Chan:37
AGC:maximum (default)
Check C575 &
RF connector
HELGO
Troubleshooting